Rename .c files to .cc files.

gcc/ada/ChangeLog: * adadecode.c: Moved to... * adadecode.cc: ...here. * affinity.c: Moved to... * affinity.cc: ...here. * argv-lynxos178-raven-cert.c: Moved to... * argv-lynxos178-raven-cert.cc: ...here. * argv.c: Moved to... * argv.cc: ...here. * aux-io.c: Moved to... * aux-io.cc: ...here. * cio.c: Moved to... * cio.cc: ...here. * cstreams.c: Moved to... * cstreams.cc: ...here. * env.c: Moved to... * env.cc: ...here. * exit.c: Moved to... * exit.cc: ...here. * expect.c: Moved to... * expect.cc: ...here. * final.c: Moved to... * final.cc: ...here. * gcc-interface/cuintp.c: Moved to... * gcc-interface/cuintp.cc: ...here. * gcc-interface/decl.c: Moved to... * gcc-interface/decl.cc: ...here. * gcc-interface/misc.c: Moved to... * gcc-interface/misc.cc: ...here. * gcc-interface/targtyps.c: Moved to... * gcc-interface/targtyps.cc: ...here. * gcc-interface/trans.c: Moved to... * gcc-interface/trans.cc: ...here. * gcc-interface/utils.c: Moved to... * gcc-interface/utils.cc: ...here. * gcc-interface/utils2.c: Moved to... * gcc-interface/utils2.cc: ...here. * init.c: Moved to... * init.cc: ...here. * initialize.c: Moved to... * initialize.cc: ...here. * libgnarl/thread.c: Moved to... * libgnarl/thread.cc: ...here. * link.c: Moved to... * link.cc: ...here. * locales.c: Moved to... * locales.cc: ...here. * mkdir.c: Moved to... * mkdir.cc: ...here. * raise.c: Moved to... * raise.cc: ...here. * rtfinal.c: Moved to... * rtfinal.cc: ...here. * rtinit.c: Moved to... * rtinit.cc: ...here. * seh_init.c: Moved to... * seh_init.cc: ...here. * sigtramp-armdroid.c: Moved to... * sigtramp-armdroid.cc: ...here. * sigtramp-ios.c: Moved to... * sigtramp-ios.cc: ...here. * sigtramp-qnx.c: Moved to... * sigtramp-qnx.cc: ...here. * sigtramp-vxworks.c: Moved to... * sigtramp-vxworks.cc: ...here. * socket.c: Moved to... * socket.cc: ...here. * tracebak.c: Moved to... * tracebak.cc: ...here. * version.c: Moved to... * version.cc: ...here. * vx_stack_info.c: Moved to... * vx_stack_info.cc: ...here. gcc/ChangeLog: * adjust-alignment.c: Moved to... * adjust-alignment.cc: ...here. * alias.c: Moved to... * alias.cc: ...here. * alloc-pool.c: Moved to... * alloc-pool.cc: ...here. * asan.c: Moved to... * asan.cc: ...here. * attribs.c: Moved to... * attribs.cc: ...here. * auto-inc-dec.c: Moved to... * auto-inc-dec.cc: ...here. * auto-profile.c: Moved to... * auto-profile.cc: ...here. * bb-reorder.c: Moved to... * bb-reorder.cc: ...here. * bitmap.c: Moved to... * bitmap.cc: ...here. * btfout.c: Moved to... * btfout.cc: ...here. * builtins.c: Moved to... * builtins.cc: ...here. * caller-save.c: Moved to... * caller-save.cc: ...here. * calls.c: Moved to... * calls.cc: ...here. * ccmp.c: Moved to... * ccmp.cc: ...here. * cfg.c: Moved to... * cfg.cc: ...here. * cfganal.c: Moved to... * cfganal.cc: ...here. * cfgbuild.c: Moved to... * cfgbuild.cc: ...here. * cfgcleanup.c: Moved to... * cfgcleanup.cc: ...here. * cfgexpand.c: Moved to... * cfgexpand.cc: ...here. * cfghooks.c: Moved to... * cfghooks.cc: ...here. * cfgloop.c: Moved to... * cfgloop.cc: ...here. * cfgloopanal.c: Moved to... * cfgloopanal.cc: ...here. * cfgloopmanip.c: Moved to... * cfgloopmanip.cc: ...here. * cfgrtl.c: Moved to... * cfgrtl.cc: ...here. * cgraph.c: Moved to... * cgraph.cc: ...here. * cgraphbuild.c: Moved to... * cgraphbuild.cc: ...here. * cgraphclones.c: Moved to... * cgraphclones.cc: ...here. * cgraphunit.c: Moved to... * cgraphunit.cc: ...here. * collect-utils.c: Moved to... * collect-utils.cc: ...here. * collect2-aix.c: Moved to... * collect2-aix.cc: ...here. * collect2.c: Moved to... * collect2.cc: ...here. * combine-stack-adj.c: Moved to... * combine-stack-adj.cc: ...here. * combine.c: Moved to... * combine.cc: ...here. * common/common-targhooks.c: Moved to... * common/common-targhooks.cc: ...here. * common/config/aarch64/aarch64-common.c: Moved to... * common/config/aarch64/aarch64-common.cc: ...here. * common/config/alpha/alpha-common.c: Moved to... * common/config/alpha/alpha-common.cc: ...here. * common/config/arc/arc-common.c: Moved to... * common/config/arc/arc-common.cc: ...here. * common/config/arm/arm-common.c: Moved to... * common/config/arm/arm-common.cc: ...here. * common/config/avr/avr-common.c: Moved to... * common/config/avr/avr-common.cc: ...here. * common/config/bfin/bfin-common.c: Moved to... * common/config/bfin/bfin-common.cc: ...here. * common/config/bpf/bpf-common.c: Moved to... * common/config/bpf/bpf-common.cc: ...here. * common/config/c6x/c6x-common.c: Moved to... * common/config/c6x/c6x-common.cc: ...here. * common/config/cr16/cr16-common.c: Moved to... * common/config/cr16/cr16-common.cc: ...here. * common/config/cris/cris-common.c: Moved to... * common/config/cris/cris-common.cc: ...here. * common/config/csky/csky-common.c: Moved to... * common/config/csky/csky-common.cc: ...here. * common/config/default-common.c: Moved to... * common/config/default-common.cc: ...here. * common/config/epiphany/epiphany-common.c: Moved to... * common/config/epiphany/epiphany-common.cc: ...here. * common/config/fr30/fr30-common.c: Moved to... * common/config/fr30/fr30-common.cc: ...here. * common/config/frv/frv-common.c: Moved to... * common/config/frv/frv-common.cc: ...here. * common/config/gcn/gcn-common.c: Moved to... * common/config/gcn/gcn-common.cc: ...here. * common/config/h8300/h8300-common.c: Moved to... * common/config/h8300/h8300-common.cc: ...here. * common/config/i386/i386-common.c: Moved to... * common/config/i386/i386-common.cc: ...here. * common/config/ia64/ia64-common.c: Moved to... * common/config/ia64/ia64-common.cc: ...here. * common/config/iq2000/iq2000-common.c: Moved to... * common/config/iq2000/iq2000-common.cc: ...here. * common/config/lm32/lm32-common.c: Moved to... * common/config/lm32/lm32-common.cc: ...here. * common/config/m32r/m32r-common.c: Moved to... * common/config/m32r/m32r-common.cc: ...here. * common/config/m68k/m68k-common.c: Moved to... * common/config/m68k/m68k-common.cc: ...here. * common/config/mcore/mcore-common.c: Moved to... * common/config/mcore/mcore-common.cc: ...here. * common/config/microblaze/microblaze-common.c: Moved to... * common/config/microblaze/microblaze-common.cc: ...here. * common/config/mips/mips-common.c: Moved to... * common/config/mips/mips-common.cc: ...here. * common/config/mmix/mmix-common.c: Moved to... * common/config/mmix/mmix-common.cc: ...here. * common/config/mn10300/mn10300-common.c: Moved to... * common/config/mn10300/mn10300-common.cc: ...here. * common/config/msp430/msp430-common.c: Moved to... * common/config/msp430/msp430-common.cc: ...here. * common/config/nds32/nds32-common.c: Moved to... * common/config/nds32/nds32-common.cc: ...here. * common/config/nios2/nios2-common.c: Moved to... * common/config/nios2/nios2-common.cc: ...here. * common/config/nvptx/nvptx-common.c: Moved to... * common/config/nvptx/nvptx-common.cc: ...here. * common/config/or1k/or1k-common.c: Moved to... * common/config/or1k/or1k-common.cc: ...here. * common/config/pa/pa-common.c: Moved to... * common/config/pa/pa-common.cc: ...here. * common/config/pdp11/pdp11-common.c: Moved to... * common/config/pdp11/pdp11-common.cc: ...here. * common/config/pru/pru-common.c: Moved to... * common/config/pru/pru-common.cc: ...here. * common/config/riscv/riscv-common.c: Moved to... * common/config/riscv/riscv-common.cc: ...here. * common/config/rs6000/rs6000-common.c: Moved to... * common/config/rs6000/rs6000-common.cc: ...here. * common/config/rx/rx-common.c: Moved to... * common/config/rx/rx-common.cc: ...here. * common/config/s390/s390-common.c: Moved to... * common/config/s390/s390-common.cc: ...here. * common/config/sh/sh-common.c: Moved to... * common/config/sh/sh-common.cc: ...here. * common/config/sparc/sparc-common.c: Moved to... * common/config/sparc/sparc-common.cc: ...here. * common/config/tilegx/tilegx-common.c: Moved to... * common/config/tilegx/tilegx-common.cc: ...here. * common/config/tilepro/tilepro-common.c: Moved to... * common/config/tilepro/tilepro-common.cc: ...here. * common/config/v850/v850-common.c: Moved to... * common/config/v850/v850-common.cc: ...here. * common/config/vax/vax-common.c: Moved to... * common/config/vax/vax-common.cc: ...here. * common/config/visium/visium-common.c: Moved to... * common/config/visium/visium-common.cc: ...here. * common/config/xstormy16/xstormy16-common.c: Moved to... * common/config/xstormy16/xstormy16-common.cc: ...here. * common/config/xtensa/xtensa-common.c: Moved to... * common/config/xtensa/xtensa-common.cc: ...here. * compare-elim.c: Moved to... * compare-elim.cc: ...here. * config/aarch64/aarch64-bti-insert.c: Moved to... * config/aarch64/aarch64-bti-insert.cc: ...here. * config/aarch64/aarch64-builtins.c: Moved to... * config/aarch64/aarch64-builtins.cc: ...here. * config/aarch64/aarch64-c.c: Moved to... * config/aarch64/aarch64-c.cc: ...here. * config/aarch64/aarch64-d.c: Moved to... * config/aarch64/aarch64-d.cc: ...here. * config/aarch64/aarch64.c: Moved to... * config/aarch64/aarch64.cc: ...here. * config/aarch64/cortex-a57-fma-steering.c: Moved to... * config/aarch64/cortex-a57-fma-steering.cc: ...here. * config/aarch64/driver-aarch64.c: Moved to... * config/aarch64/driver-aarch64.cc: ...here. * config/aarch64/falkor-tag-collision-avoidance.c: Moved to... * config/aarch64/falkor-tag-collision-avoidance.cc: ...here. * config/aarch64/host-aarch64-darwin.c: Moved to... * config/aarch64/host-aarch64-darwin.cc: ...here. * config/alpha/alpha.c: Moved to... * config/alpha/alpha.cc: ...here. * config/alpha/driver-alpha.c: Moved to... * config/alpha/driver-alpha.cc: ...here. * config/arc/arc-c.c: Moved to... * config/arc/arc-c.cc: ...here. * config/arc/arc.c: Moved to... * config/arc/arc.cc: ...here. * config/arc/driver-arc.c: Moved to... * config/arc/driver-arc.cc: ...here. * config/arm/aarch-common.c: Moved to... * config/arm/aarch-common.cc: ...here. * config/arm/arm-builtins.c: Moved to... * config/arm/arm-builtins.cc: ...here. * config/arm/arm-c.c: Moved to... * config/arm/arm-c.cc: ...here. * config/arm/arm-d.c: Moved to... * config/arm/arm-d.cc: ...here. * config/arm/arm.c: Moved to... * config/arm/arm.cc: ...here. * config/arm/driver-arm.c: Moved to... * config/arm/driver-arm.cc: ...here. * config/avr/avr-c.c: Moved to... * config/avr/avr-c.cc: ...here. * config/avr/avr-devices.c: Moved to... * config/avr/avr-devices.cc: ...here. * config/avr/avr-log.c: Moved to... * config/avr/avr-log.cc: ...here. * config/avr/avr.c: Moved to... * config/avr/avr.cc: ...here. * config/avr/driver-avr.c: Moved to... * config/avr/driver-avr.cc: ...here. * config/avr/gen-avr-mmcu-specs.c: Moved to... * config/avr/gen-avr-mmcu-specs.cc: ...here. * config/avr/gen-avr-mmcu-texi.c: Moved to... * config/avr/gen-avr-mmcu-texi.cc: ...here. * config/bfin/bfin.c: Moved to... * config/bfin/bfin.cc: ...here. * config/bpf/bpf.c: Moved to... * config/bpf/bpf.cc: ...here. * config/bpf/coreout.c: Moved to... * config/bpf/coreout.cc: ...here. * config/c6x/c6x.c: Moved to... * config/c6x/c6x.cc: ...here. * config/cr16/cr16.c: Moved to... * config/cr16/cr16.cc: ...here. * config/cris/cris.c: Moved to... * config/cris/cris.cc: ...here. * config/csky/csky.c: Moved to... * config/csky/csky.cc: ...here. * config/darwin-c.c: Moved to... * config/darwin-c.cc: ...here. * config/darwin-d.c: Moved to... * config/darwin-d.cc: ...here. * config/darwin-driver.c: Moved to... * config/darwin-driver.cc: ...here. * config/darwin-f.c: Moved to... * config/darwin-f.cc: ...here. * config/darwin.c: Moved to... * config/darwin.cc: ...here. * config/default-c.c: Moved to... * config/default-c.cc: ...here. * config/default-d.c: Moved to... * config/default-d.cc: ...here. * config/dragonfly-d.c: Moved to... * config/dragonfly-d.cc: ...here. * config/epiphany/epiphany.c: Moved to... * config/epiphany/epiphany.cc: ...here. * config/epiphany/mode-switch-use.c: Moved to... * config/epiphany/mode-switch-use.cc: ...here. * config/epiphany/resolve-sw-modes.c: Moved to... * config/epiphany/resolve-sw-modes.cc: ...here. * config/fr30/fr30.c: Moved to... * config/fr30/fr30.cc: ...here. * config/freebsd-d.c: Moved to... * config/freebsd-d.cc: ...here. * config/frv/frv.c: Moved to... * config/frv/frv.cc: ...here. * config/ft32/ft32.c: Moved to... * config/ft32/ft32.cc: ...here. * config/gcn/driver-gcn.c: Moved to... * config/gcn/driver-gcn.cc: ...here. * config/gcn/gcn-run.c: Moved to... * config/gcn/gcn-run.cc: ...here. * config/gcn/gcn-tree.c: Moved to... * config/gcn/gcn-tree.cc: ...here. * config/gcn/gcn.c: Moved to... * config/gcn/gcn.cc: ...here. * config/gcn/mkoffload.c: Moved to... * config/gcn/mkoffload.cc: ...here. * config/glibc-c.c: Moved to... * config/glibc-c.cc: ...here. * config/glibc-d.c: Moved to... * config/glibc-d.cc: ...here. * config/h8300/h8300.c: Moved to... * config/h8300/h8300.cc: ...here. * config/host-darwin.c: Moved to... * config/host-darwin.cc: ...here. * config/host-hpux.c: Moved to... * config/host-hpux.cc: ...here. * config/host-linux.c: Moved to... * config/host-linux.cc: ...here. * config/host-netbsd.c: Moved to... * config/host-netbsd.cc: ...here. * config/host-openbsd.c: Moved to... * config/host-openbsd.cc: ...here. * config/host-solaris.c: Moved to... * config/host-solaris.cc: ...here. * config/i386/djgpp.c: Moved to... * config/i386/djgpp.cc: ...here. * config/i386/driver-i386.c: Moved to... * config/i386/driver-i386.cc: ...here. * config/i386/driver-mingw32.c: Moved to... * config/i386/driver-mingw32.cc: ...here. * config/i386/gnu-property.c: Moved to... * config/i386/gnu-property.cc: ...here. * config/i386/host-cygwin.c: Moved to... * config/i386/host-cygwin.cc: ...here. * config/i386/host-i386-darwin.c: Moved to... * config/i386/host-i386-darwin.cc: ...here. * config/i386/host-mingw32.c: Moved to... * config/i386/host-mingw32.cc: ...here. * config/i386/i386-builtins.c: Moved to... * config/i386/i386-builtins.cc: ...here. * config/i386/i386-c.c: Moved to... * config/i386/i386-c.cc: ...here. * config/i386/i386-d.c: Moved to... * config/i386/i386-d.cc: ...here. * config/i386/i386-expand.c: Moved to... * config/i386/i386-expand.cc: ...here. * config/i386/i386-features.c: Moved to... * config/i386/i386-features.cc: ...here. * config/i386/i386-options.c: Moved to... * config/i386/i386-options.cc: ...here. * config/i386/i386.c: Moved to... * config/i386/i386.cc: ...here. * config/i386/intelmic-mkoffload.c: Moved to... * config/i386/intelmic-mkoffload.cc: ...here. * config/i386/msformat-c.c: Moved to... * config/i386/msformat-c.cc: ...here. * config/i386/winnt-cxx.c: Moved to... * config/i386/winnt-cxx.cc: ...here. * config/i386/winnt-d.c: Moved to... * config/i386/winnt-d.cc: ...here. * config/i386/winnt-stubs.c: Moved to... * config/i386/winnt-stubs.cc: ...here. * config/i386/winnt.c: Moved to... * config/i386/winnt.cc: ...here. * config/i386/x86-tune-sched-atom.c: Moved to... * config/i386/x86-tune-sched-atom.cc: ...here. * config/i386/x86-tune-sched-bd.c: Moved to... * config/i386/x86-tune-sched-bd.cc: ...here. * config/i386/x86-tune-sched-core.c: Moved to... * config/i386/x86-tune-sched-core.cc: ...here. * config/i386/x86-tune-sched.c: Moved to... * config/i386/x86-tune-sched.cc: ...here. * config/ia64/ia64-c.c: Moved to... * config/ia64/ia64-c.cc: ...here. * config/ia64/ia64.c: Moved to... * config/ia64/ia64.cc: ...here. * config/iq2000/iq2000.c: Moved to... * config/iq2000/iq2000.cc: ...here. * config/linux.c: Moved to... * config/linux.cc: ...here. * config/lm32/lm32.c: Moved to... * config/lm32/lm32.cc: ...here. * config/m32c/m32c-pragma.c: Moved to... * config/m32c/m32c-pragma.cc: ...here. * config/m32c/m32c.c: Moved to... * config/m32c/m32c.cc: ...here. * config/m32r/m32r.c: Moved to... * config/m32r/m32r.cc: ...here. * config/m68k/m68k.c: Moved to... * config/m68k/m68k.cc: ...here. * config/mcore/mcore.c: Moved to... * config/mcore/mcore.cc: ...here. * config/microblaze/microblaze-c.c: Moved to... * config/microblaze/microblaze-c.cc: ...here. * config/microblaze/microblaze.c: Moved to... * config/microblaze/microblaze.cc: ...here. * config/mips/driver-native.c: Moved to... * config/mips/driver-native.cc: ...here. * config/mips/frame-header-opt.c: Moved to... * config/mips/frame-header-opt.cc: ...here. * config/mips/mips-d.c: Moved to... * config/mips/mips-d.cc: ...here. * config/mips/mips.c: Moved to... * config/mips/mips.cc: ...here. * config/mmix/mmix.c: Moved to... * config/mmix/mmix.cc: ...here. * config/mn10300/mn10300.c: Moved to... * config/mn10300/mn10300.cc: ...here. * config/moxie/moxie.c: Moved to... * config/moxie/moxie.cc: ...here. * config/msp430/driver-msp430.c: Moved to... * config/msp430/driver-msp430.cc: ...here. * config/msp430/msp430-c.c: Moved to... * config/msp430/msp430-c.cc: ...here. * config/msp430/msp430-devices.c: Moved to... * config/msp430/msp430-devices.cc: ...here. * config/msp430/msp430.c: Moved to... * config/msp430/msp430.cc: ...here. * config/nds32/nds32-cost.c: Moved to... * config/nds32/nds32-cost.cc: ...here. * config/nds32/nds32-fp-as-gp.c: Moved to... * config/nds32/nds32-fp-as-gp.cc: ...here. * config/nds32/nds32-intrinsic.c: Moved to... * config/nds32/nds32-intrinsic.cc: ...here. * config/nds32/nds32-isr.c: Moved to... * config/nds32/nds32-isr.cc: ...here. * config/nds32/nds32-md-auxiliary.c: Moved to... * config/nds32/nds32-md-auxiliary.cc: ...here. * config/nds32/nds32-memory-manipulation.c: Moved to... * config/nds32/nds32-memory-manipulation.cc: ...here. * config/nds32/nds32-pipelines-auxiliary.c: Moved to... * config/nds32/nds32-pipelines-auxiliary.cc: ...here. * config/nds32/nds32-predicates.c: Moved to... * config/nds32/nds32-predicates.cc: ...here. * config/nds32/nds32-relax-opt.c: Moved to... * config/nds32/nds32-relax-opt.cc: ...here. * config/nds32/nds32-utils.c: Moved to... * config/nds32/nds32-utils.cc: ...here. * config/nds32/nds32.c: Moved to... * config/nds32/nds32.cc: ...here. * config/netbsd-d.c: Moved to... * config/netbsd-d.cc: ...here. * config/netbsd.c: Moved to... * config/netbsd.cc: ...here. * config/nios2/nios2.c: Moved to... * config/nios2/nios2.cc: ...here. * config/nvptx/mkoffload.c: Moved to... * config/nvptx/mkoffload.cc: ...here. * config/nvptx/nvptx-c.c: Moved to... * config/nvptx/nvptx-c.cc: ...here. * config/nvptx/nvptx.c: Moved to... * config/nvptx/nvptx.cc: ...here. * config/openbsd-d.c: Moved to... * config/openbsd-d.cc: ...here. * config/or1k/or1k.c: Moved to... * config/or1k/or1k.cc: ...here. * config/pa/pa-d.c: Moved to... * config/pa/pa-d.cc: ...here. * config/pa/pa.c: Moved to... * config/pa/pa.cc: ...here. * config/pdp11/pdp11.c: Moved to... * config/pdp11/pdp11.cc: ...here. * config/pru/pru-passes.c: Moved to... * config/pru/pru-passes.cc: ...here. * config/pru/pru-pragma.c: Moved to... * config/pru/pru-pragma.cc: ...here. * config/pru/pru.c: Moved to... * config/pru/pru.cc: ...here. * config/riscv/riscv-builtins.c: Moved to... * config/riscv/riscv-builtins.cc: ...here. * config/riscv/riscv-c.c: Moved to... * config/riscv/riscv-c.cc: ...here. * config/riscv/riscv-d.c: Moved to... * config/riscv/riscv-d.cc: ...here. * config/riscv/riscv-shorten-memrefs.c: Moved to... * config/riscv/riscv-shorten-memrefs.cc: ...here. * config/riscv/riscv-sr.c: Moved to... * config/riscv/riscv-sr.cc: ...here. * config/riscv/riscv.c: Moved to... * config/riscv/riscv.cc: ...here. * config/rl78/rl78-c.c: Moved to... * config/rl78/rl78-c.cc: ...here. * config/rl78/rl78.c: Moved to... * config/rl78/rl78.cc: ...here. * config/rs6000/driver-rs6000.c: Moved to... * config/rs6000/driver-rs6000.cc: ...here. * config/rs6000/host-darwin.c: Moved to... * config/rs6000/host-darwin.cc: ...here. * config/rs6000/host-ppc64-darwin.c: Moved to... * config/rs6000/host-ppc64-darwin.cc: ...here. * config/rs6000/rbtree.c: Moved to... * config/rs6000/rbtree.cc: ...here. * config/rs6000/rs6000-c.c: Moved to... * config/rs6000/rs6000-c.cc: ...here. * config/rs6000/rs6000-call.c: Moved to... * config/rs6000/rs6000-call.cc: ...here. * config/rs6000/rs6000-d.c: Moved to... * config/rs6000/rs6000-d.cc: ...here. * config/rs6000/rs6000-gen-builtins.c: Moved to... * config/rs6000/rs6000-gen-builtins.cc: ...here. * config/rs6000/rs6000-linux.c: Moved to... * config/rs6000/rs6000-linux.cc: ...here. * config/rs6000/rs6000-logue.c: Moved to... * config/rs6000/rs6000-logue.cc: ...here. * config/rs6000/rs6000-p8swap.c: Moved to... * config/rs6000/rs6000-p8swap.cc: ...here. * config/rs6000/rs6000-pcrel-opt.c: Moved to... * config/rs6000/rs6000-pcrel-opt.cc: ...here. * config/rs6000/rs6000-string.c: Moved to... * config/rs6000/rs6000-string.cc: ...here. * config/rs6000/rs6000.c: Moved to... * config/rs6000/rs6000.cc: ...here. * config/rx/rx.c: Moved to... * config/rx/rx.cc: ...here. * config/s390/driver-native.c: Moved to... * config/s390/driver-native.cc: ...here. * config/s390/s390-c.c: Moved to... * config/s390/s390-c.cc: ...here. * config/s390/s390-d.c: Moved to... * config/s390/s390-d.cc: ...here. * config/s390/s390.c: Moved to... * config/s390/s390.cc: ...here. * config/sh/divtab-sh4-300.c: Moved to... * config/sh/divtab-sh4-300.cc: ...here. * config/sh/divtab-sh4.c: Moved to... * config/sh/divtab-sh4.cc: ...here. * config/sh/divtab.c: Moved to... * config/sh/divtab.cc: ...here. * config/sh/sh-c.c: Moved to... * config/sh/sh-c.cc: ...here. * config/sh/sh.c: Moved to... * config/sh/sh.cc: ...here. * config/sol2-c.c: Moved to... * config/sol2-c.cc: ...here. * config/sol2-cxx.c: Moved to... * config/sol2-cxx.cc: ...here. * config/sol2-d.c: Moved to... * config/sol2-d.cc: ...here. * config/sol2-stubs.c: Moved to... * config/sol2-stubs.cc: ...here. * config/sol2.c: Moved to... * config/sol2.cc: ...here. * config/sparc/driver-sparc.c: Moved to... * config/sparc/driver-sparc.cc: ...here. * config/sparc/sparc-c.c: Moved to... * config/sparc/sparc-c.cc: ...here. * config/sparc/sparc-d.c: Moved to... * config/sparc/sparc-d.cc: ...here. * config/sparc/sparc.c: Moved to... * config/sparc/sparc.cc: ...here. * config/stormy16/stormy16.c: Moved to... * config/stormy16/stormy16.cc: ...here. * config/tilegx/mul-tables.c: Moved to... * config/tilegx/mul-tables.cc: ...here. * config/tilegx/tilegx-c.c: Moved to... * config/tilegx/tilegx-c.cc: ...here. * config/tilegx/tilegx.c: Moved to... * config/tilegx/tilegx.cc: ...here. * config/tilepro/mul-tables.c: Moved to... * config/tilepro/mul-tables.cc: ...here. * config/tilepro/tilepro-c.c: Moved to... * config/tilepro/tilepro-c.cc: ...here. * config/tilepro/tilepro.c: Moved to... * config/tilepro/tilepro.cc: ...here. * config/v850/v850-c.c: Moved to... * config/v850/v850-c.cc: ...here. * config/v850/v850.c: Moved to... * config/v850/v850.cc: ...here. * config/vax/vax.c: Moved to... * config/vax/vax.cc: ...here. * config/visium/visium.c: Moved to... * config/visium/visium.cc: ...here. * config/vms/vms-c.c: Moved to... * config/vms/vms-c.cc: ...here. * config/vms/vms-f.c: Moved to... * config/vms/vms-f.cc: ...here. * config/vms/vms.c: Moved to... * config/vms/vms.cc: ...here. * config/vxworks-c.c: Moved to... * config/vxworks-c.cc: ...here. * config/vxworks.c: Moved to... * config/vxworks.cc: ...here. * config/winnt-c.c: Moved to... * config/winnt-c.cc: ...here. * config/xtensa/xtensa.c: Moved to... * config/xtensa/xtensa.cc: ...here. * context.c: Moved to... * context.cc: ...here. * convert.c: Moved to... * convert.cc: ...here. * coverage.c: Moved to... * coverage.cc: ...here. * cppbuiltin.c: Moved to... * cppbuiltin.cc: ...here. * cppdefault.c: Moved to... * cppdefault.cc: ...here. * cprop.c: Moved to... * cprop.cc: ...here. * cse.c: Moved to... * cse.cc: ...here. * cselib.c: Moved to... * cselib.cc: ...here. * ctfc.c: Moved to... * ctfc.cc: ...here. * ctfout.c: Moved to... * ctfout.cc: ...here. * data-streamer-in.c: Moved to... * data-streamer-in.cc: ...here. * data-streamer-out.c: Moved to... * data-streamer-out.cc: ...here. * data-streamer.c: Moved to... * data-streamer.cc: ...here. * dbgcnt.c: Moved to... * dbgcnt.cc: ...here. * dbxout.c: Moved to... * dbxout.cc: ...here. * dce.c: Moved to... * dce.cc: ...here. * ddg.c: Moved to... * ddg.cc: ...here. * debug.c: Moved to... * debug.cc: ...here. * df-core.c: Moved to... * df-core.cc: ...here. * df-problems.c: Moved to... * df-problems.cc: ...here. * df-scan.c: Moved to... * df-scan.cc: ...here. * dfp.c: Moved to... * dfp.cc: ...here. * diagnostic-color.c: Moved to... * diagnostic-color.cc: ...here. * diagnostic-show-locus.c: Moved to... * diagnostic-show-locus.cc: ...here. * diagnostic-spec.c: Moved to... * diagnostic-spec.cc: ...here. * diagnostic.c: Moved to... * diagnostic.cc: ...here. * dojump.c: Moved to... * dojump.cc: ...here. * dominance.c: Moved to... * dominance.cc: ...here. * domwalk.c: Moved to... * domwalk.cc: ...here. * double-int.c: Moved to... * double-int.cc: ...here. * dse.c: Moved to... * dse.cc: ...here. * dumpfile.c: Moved to... * dumpfile.cc: ...here. * dwarf2asm.c: Moved to... * dwarf2asm.cc: ...here. * dwarf2cfi.c: Moved to... * dwarf2cfi.cc: ...here. * dwarf2ctf.c: Moved to... * dwarf2ctf.cc: ...here. * dwarf2out.c: Moved to... * dwarf2out.cc: ...here. * early-remat.c: Moved to... * early-remat.cc: ...here. * edit-context.c: Moved to... * edit-context.cc: ...here. * emit-rtl.c: Moved to... * emit-rtl.cc: ...here. * errors.c: Moved to... * errors.cc: ...here. * et-forest.c: Moved to... * et-forest.cc: ...here. * except.c: Moved to... * except.cc: ...here. * explow.c: Moved to... * explow.cc: ...here. * expmed.c: Moved to... * expmed.cc: ...here. * expr.c: Moved to... * expr.cc: ...here. * fibonacci_heap.c: Moved to... * fibonacci_heap.cc: ...here. * file-find.c: Moved to... * file-find.cc: ...here. * file-prefix-map.c: Moved to... * file-prefix-map.cc: ...here. * final.c: Moved to... * final.cc: ...here. * fixed-value.c: Moved to... * fixed-value.cc: ...here. * fold-const-call.c: Moved to... * fold-const-call.cc: ...here. * fold-const.c: Moved to... * fold-const.cc: ...here. * fp-test.c: Moved to... * fp-test.cc: ...here. * function-tests.c: Moved to... * function-tests.cc: ...here. * function.c: Moved to... * function.cc: ...here. * fwprop.c: Moved to... * fwprop.cc: ...here. * gcc-ar.c: Moved to... * gcc-ar.cc: ...here. * gcc-main.c: Moved to... * gcc-main.cc: ...here. * gcc-rich-location.c: Moved to... * gcc-rich-location.cc: ...here. * gcc.c: Moved to... * gcc.cc: ...here. * gcov-dump.c: Moved to... * gcov-dump.cc: ...here. * gcov-io.c: Moved to... * gcov-io.cc: ...here. * gcov-tool.c: Moved to... * gcov-tool.cc: ...here. * gcov.c: Moved to... * gcov.cc: ...here. * gcse-common.c: Moved to... * gcse-common.cc: ...here. * gcse.c: Moved to... * gcse.cc: ...here. * genattr-common.c: Moved to... * genattr-common.cc: ...here. * genattr.c: Moved to... * genattr.cc: ...here. * genattrtab.c: Moved to... * genattrtab.cc: ...here. * genautomata.c: Moved to... * genautomata.cc: ...here. * gencfn-macros.c: Moved to... * gencfn-macros.cc: ...here. * gencheck.c: Moved to... * gencheck.cc: ...here. * genchecksum.c: Moved to... * genchecksum.cc: ...here. * gencodes.c: Moved to... * gencodes.cc: ...here. * genconditions.c: Moved to... * genconditions.cc: ...here. * genconfig.c: Moved to... * genconfig.cc: ...here. * genconstants.c: Moved to... * genconstants.cc: ...here. * genemit.c: Moved to... * genemit.cc: ...here. * genenums.c: Moved to... * genenums.cc: ...here. * generic-match-head.c: Moved to... * generic-match-head.cc: ...here. * genextract.c: Moved to... * genextract.cc: ...here. * genflags.c: Moved to... * genflags.cc: ...here. * gengenrtl.c: Moved to... * gengenrtl.cc: ...here. * gengtype-parse.c: Moved to... * gengtype-parse.cc: ...here. * gengtype-state.c: Moved to... * gengtype-state.cc: ...here. * gengtype.c: Moved to... * gengtype.cc: ...here. * genhooks.c: Moved to... * genhooks.cc: ...here. * genmatch.c: Moved to... * genmatch.cc: ...here. * genmddeps.c: Moved to... * genmddeps.cc: ...here. * genmddump.c: Moved to... * genmddump.cc: ...here. * genmodes.c: Moved to... * genmodes.cc: ...here. * genopinit.c: Moved to... * genopinit.cc: ...here. * genoutput.c: Moved to... * genoutput.cc: ...here. * genpeep.c: Moved to... * genpeep.cc: ...here. * genpreds.c: Moved to... * genpreds.cc: ...here. * genrecog.c: Moved to... * genrecog.cc: ...here. * gensupport.c: Moved to... * gensupport.cc: ...here. * gentarget-def.c: Moved to... * gentarget-def.cc: ...here. * genversion.c: Moved to... * genversion.cc: ...here. * ggc-common.c: Moved to... * ggc-common.cc: ...here. * ggc-none.c: Moved to... * ggc-none.cc: ...here. * ggc-page.c: Moved to... * ggc-page.cc: ...here. * ggc-tests.c: Moved to... * ggc-tests.cc: ...here. * gimple-builder.c: Moved to... * gimple-builder.cc: ...here. * gimple-expr.c: Moved to... * gimple-expr.cc: ...here. * gimple-fold.c: Moved to... * gimple-fold.cc: ...here. * gimple-iterator.c: Moved to... * gimple-iterator.cc: ...here. * gimple-laddress.c: Moved to... * gimple-laddress.cc: ...here. * gimple-loop-jam.c: Moved to... * gimple-loop-jam.cc: ...here. * gimple-low.c: Moved to... * gimple-low.cc: ...here. * gimple-match-head.c: Moved to... * gimple-match-head.cc: ...here. * gimple-pretty-print.c: Moved to... * gimple-pretty-print.cc: ...here. * gimple-ssa-backprop.c: Moved to... * gimple-ssa-backprop.cc: ...here. * gimple-ssa-evrp-analyze.c: Moved to... * gimple-ssa-evrp-analyze.cc: ...here. * gimple-ssa-evrp.c: Moved to... * gimple-ssa-evrp.cc: ...here. * gimple-ssa-isolate-paths.c: Moved to... * gimple-ssa-isolate-paths.cc: ...here. * gimple-ssa-nonnull-compare.c: Moved to... * gimple-ssa-nonnull-compare.cc: ...here. * gimple-ssa-split-paths.c: Moved to... * gimple-ssa-split-paths.cc: ...here. * gimple-ssa-sprintf.c: Moved to... * gimple-ssa-sprintf.cc: ...here. * gimple-ssa-store-merging.c: Moved to... * gimple-ssa-store-merging.cc: ...here. * gimple-ssa-strength-reduction.c: Moved to... * gimple-ssa-strength-reduction.cc: ...here. * gimple-ssa-warn-alloca.c: Moved to... * gimple-ssa-warn-alloca.cc: ...here. * gimple-ssa-warn-restrict.c: Moved to... * gimple-ssa-warn-restrict.cc: ...here. * gimple-streamer-in.c: Moved to... * gimple-streamer-in.cc: ...here. * gimple-streamer-out.c: Moved to... * gimple-streamer-out.cc: ...here. * gimple-walk.c: Moved to... * gimple-walk.cc: ...here. * gimple-warn-recursion.c: Moved to... * gimple-warn-recursion.cc: ...here. * gimple.c: Moved to... * gimple.cc: ...here. * gimplify-me.c: Moved to... * gimplify-me.cc: ...here. * gimplify.c: Moved to... * gimplify.cc: ...here. * godump.c: Moved to... * godump.cc: ...here. * graph.c: Moved to... * graph.cc: ...here. * graphds.c: Moved to... * graphds.cc: ...here. * graphite-dependences.c: Moved to... * graphite-dependences.cc: ...here. * graphite-isl-ast-to-gimple.c: Moved to... * graphite-isl-ast-to-gimple.cc: ...here. * graphite-optimize-isl.c: Moved to... * graphite-optimize-isl.cc: ...here. * graphite-poly.c: Moved to... * graphite-poly.cc: ...here. * graphite-scop-detection.c: Moved to... * graphite-scop-detection.cc: ...here. * graphite-sese-to-poly.c: Moved to... * graphite-sese-to-poly.cc: ...here. * graphite.c: Moved to... * graphite.cc: ...here. * haifa-sched.c: Moved to... * haifa-sched.cc: ...here. * hash-map-tests.c: Moved to... * hash-map-tests.cc: ...here. * hash-set-tests.c: Moved to... * hash-set-tests.cc: ...here. * hash-table.c: Moved to... * hash-table.cc: ...here. * hooks.c: Moved to... * hooks.cc: ...here. * host-default.c: Moved to... * host-default.cc: ...here. * hw-doloop.c: Moved to... * hw-doloop.cc: ...here. * hwint.c: Moved to... * hwint.cc: ...here. * ifcvt.c: Moved to... * ifcvt.cc: ...here. * inchash.c: Moved to... * inchash.cc: ...here. * incpath.c: Moved to... * incpath.cc: ...here. * init-regs.c: Moved to... * init-regs.cc: ...here. * input.c: Moved to... * input.cc: ...here. * internal-fn.c: Moved to... * internal-fn.cc: ...here. * intl.c: Moved to... * intl.cc: ...here. * ipa-comdats.c: Moved to... * ipa-comdats.cc: ...here. * ipa-cp.c: Moved to... * ipa-cp.cc: ...here. * ipa-devirt.c: Moved to... * ipa-devirt.cc: ...here. * ipa-fnsummary.c: Moved to... * ipa-fnsummary.cc: ...here. * ipa-icf-gimple.c: Moved to... * ipa-icf-gimple.cc: ...here. * ipa-icf.c: Moved to... * ipa-icf.cc: ...here. * ipa-inline-analysis.c: Moved to... * ipa-inline-analysis.cc: ...here. * ipa-inline-transform.c: Moved to... * ipa-inline-transform.cc: ...here. * ipa-inline.c: Moved to... * ipa-inline.cc: ...here. * ipa-modref-tree.c: Moved to... * ipa-modref-tree.cc: ...here. * ipa-modref.c: Moved to... * ipa-modref.cc: ...here. * ipa-param-manipulation.c: Moved to... * ipa-param-manipulation.cc: ...here. * ipa-polymorphic-call.c: Moved to... * ipa-polymorphic-call.cc: ...here. * ipa-predicate.c: Moved to... * ipa-predicate.cc: ...here. * ipa-profile.c: Moved to... * ipa-profile.cc: ...here. * ipa-prop.c: Moved to... * ipa-prop.cc: ...here. * ipa-pure-const.c: Moved to... * ipa-pure-const.cc: ...here. * ipa-ref.c: Moved to... * ipa-ref.cc: ...here. * ipa-reference.c: Moved to... * ipa-reference.cc: ...here. * ipa-split.c: Moved to... * ipa-split.cc: ...here. * ipa-sra.c: Moved to... * ipa-sra.cc: ...here. * ipa-utils.c: Moved to... * ipa-utils.cc: ...here. * ipa-visibility.c: Moved to... * ipa-visibility.cc: ...here. * ipa.c: Moved to... * ipa.cc: ...here. * ira-build.c: Moved to... * ira-build.cc: ...here. * ira-color.c: Moved to... * ira-color.cc: ...here. * ira-conflicts.c: Moved to... * ira-conflicts.cc: ...here. * ira-costs.c: Moved to... * ira-costs.cc: ...here. * ira-emit.c: Moved to... * ira-emit.cc: ...here. * ira-lives.c: Moved to... * ira-lives.cc: ...here. * ira.c: Moved to... * ira.cc: ...here. * jump.c: Moved to... * jump.cc: ...here. * langhooks.c: Moved to... * langhooks.cc: ...here. * lcm.c: Moved to... * lcm.cc: ...here. * lists.c: Moved to... * lists.cc: ...here. * loop-doloop.c: Moved to... * loop-doloop.cc: ...here. * loop-init.c: Moved to... * loop-init.cc: ...here. * loop-invariant.c: Moved to... * loop-invariant.cc: ...here. * loop-iv.c: Moved to... * loop-iv.cc: ...here. * loop-unroll.c: Moved to... * loop-unroll.cc: ...here. * lower-subreg.c: Moved to... * lower-subreg.cc: ...here. * lra-assigns.c: Moved to... * lra-assigns.cc: ...here. * lra-coalesce.c: Moved to... * lra-coalesce.cc: ...here. * lra-constraints.c: Moved to... * lra-constraints.cc: ...here. * lra-eliminations.c: Moved to... * lra-eliminations.cc: ...here. * lra-lives.c: Moved to... * lra-lives.cc: ...here. * lra-remat.c: Moved to... * lra-remat.cc: ...here. * lra-spills.c: Moved to... * lra-spills.cc: ...here. * lra.c: Moved to... * lra.cc: ...here. * lto-cgraph.c: Moved to... * lto-cgraph.cc: ...here. * lto-compress.c: Moved to... * lto-compress.cc: ...here. * lto-opts.c: Moved to... * lto-opts.cc: ...here. * lto-section-in.c: Moved to... * lto-section-in.cc: ...here. * lto-section-out.c: Moved to... * lto-section-out.cc: ...here. * lto-streamer-in.c: Moved to... * lto-streamer-in.cc: ...here. * lto-streamer-out.c: Moved to... * lto-streamer-out.cc: ...here. * lto-streamer.c: Moved to... * lto-streamer.cc: ...here. * lto-wrapper.c: Moved to... * lto-wrapper.cc: ...here. * main.c: Moved to... * main.cc: ...here. * mcf.c: Moved to... * mcf.cc: ...here. * mode-switching.c: Moved to... * mode-switching.cc: ...here. * modulo-sched.c: Moved to... * modulo-sched.cc: ...here. * multiple_target.c: Moved to... * multiple_target.cc: ...here. * omp-expand.c: Moved to... * omp-expand.cc: ...here. * omp-general.c: Moved to... * omp-general.cc: ...here. * omp-low.c: Moved to... * omp-low.cc: ...here. * omp-offload.c: Moved to... * omp-offload.cc: ...here. * omp-simd-clone.c: Moved to... * omp-simd-clone.cc: ...here. * opt-suggestions.c: Moved to... * opt-suggestions.cc: ...here. * optabs-libfuncs.c: Moved to... * optabs-libfuncs.cc: ...here. * optabs-query.c: Moved to... * optabs-query.cc: ...here. * optabs-tree.c: Moved to... * optabs-tree.cc: ...here. * optabs.c: Moved to... * optabs.cc: ...here. * opts-common.c: Moved to... * opts-common.cc: ...here. * opts-global.c: Moved to... * opts-global.cc: ...here. * opts.c: Moved to... * opts.cc: ...here. * passes.c: Moved to... * passes.cc: ...here. * plugin.c: Moved to... * plugin.cc: ...here. * postreload-gcse.c: Moved to... * postreload-gcse.cc: ...here. * postreload.c: Moved to... * postreload.cc: ...here. * predict.c: Moved to... * predict.cc: ...here. * prefix.c: Moved to... * prefix.cc: ...here. * pretty-print.c: Moved to... * pretty-print.cc: ...here. * print-rtl-function.c: Moved to... * print-rtl-function.cc: ...here. * print-rtl.c: Moved to... * print-rtl.cc: ...here. * print-tree.c: Moved to... * print-tree.cc: ...here. * profile-count.c: Moved to... * profile-count.cc: ...here. * profile.c: Moved to... * profile.cc: ...here. * read-md.c: Moved to... * read-md.cc: ...here. * read-rtl-function.c: Moved to... * read-rtl-function.cc: ...here. * read-rtl.c: Moved to... * read-rtl.cc: ...here. * real.c: Moved to... * real.cc: ...here. * realmpfr.c: Moved to... * realmpfr.cc: ...here. * recog.c: Moved to... * recog.cc: ...here. * ree.c: Moved to... * ree.cc: ...here. * reg-stack.c: Moved to... * reg-stack.cc: ...here. * regcprop.c: Moved to... * regcprop.cc: ...here. * reginfo.c: Moved to... * reginfo.cc: ...here. * regrename.c: Moved to... * regrename.cc: ...here. * regstat.c: Moved to... * regstat.cc: ...here. * reload.c: Moved to... * reload.cc: ...here. * reload1.c: Moved to... * reload1.cc: ...here. * reorg.c: Moved to... * reorg.cc: ...here. * resource.c: Moved to... * resource.cc: ...here. * rtl-error.c: Moved to... * rtl-error.cc: ...here. * rtl-tests.c: Moved to... * rtl-tests.cc: ...here. * rtl.c: Moved to... * rtl.cc: ...here. * rtlanal.c: Moved to... * rtlanal.cc: ...here. * rtlhash.c: Moved to... * rtlhash.cc: ...here. * rtlhooks.c: Moved to... * rtlhooks.cc: ...here. * rtx-vector-builder.c: Moved to... * rtx-vector-builder.cc: ...here. * run-rtl-passes.c: Moved to... * run-rtl-passes.cc: ...here. * sancov.c: Moved to... * sancov.cc: ...here. * sanopt.c: Moved to... * sanopt.cc: ...here. * sbitmap.c: Moved to... * sbitmap.cc: ...here. * sched-deps.c: Moved to... * sched-deps.cc: ...here. * sched-ebb.c: Moved to... * sched-ebb.cc: ...here. * sched-rgn.c: Moved to... * sched-rgn.cc: ...here. * sel-sched-dump.c: Moved to... * sel-sched-dump.cc: ...here. * sel-sched-ir.c: Moved to... * sel-sched-ir.cc: ...here. * sel-sched.c: Moved to... * sel-sched.cc: ...here. * selftest-diagnostic.c: Moved to... * selftest-diagnostic.cc: ...here. * selftest-rtl.c: Moved to... * selftest-rtl.cc: ...here. * selftest-run-tests.c: Moved to... * selftest-run-tests.cc: ...here. * selftest.c: Moved to... * selftest.cc: ...here. * sese.c: Moved to... * sese.cc: ...here. * shrink-wrap.c: Moved to... * shrink-wrap.cc: ...here. * simplify-rtx.c: Moved to... * simplify-rtx.cc: ...here. * sparseset.c: Moved to... * sparseset.cc: ...here. * spellcheck-tree.c: Moved to... * spellcheck-tree.cc: ...here. * spellcheck.c: Moved to... * spellcheck.cc: ...here. * sreal.c: Moved to... * sreal.cc: ...here. * stack-ptr-mod.c: Moved to... * stack-ptr-mod.cc: ...here. * statistics.c: Moved to... * statistics.cc: ...here. * stmt.c: Moved to... * stmt.cc: ...here. * stor-layout.c: Moved to... * stor-layout.cc: ...here. * store-motion.c: Moved to... * store-motion.cc: ...here. * streamer-hooks.c: Moved to... * streamer-hooks.cc: ...here. * stringpool.c: Moved to... * stringpool.cc: ...here. * substring-locations.c: Moved to... * substring-locations.cc: ...here. * symtab.c: Moved to... * symtab.cc: ...here. * target-globals.c: Moved to... * target-globals.cc: ...here. * targhooks.c: Moved to... * targhooks.cc: ...here. * timevar.c: Moved to... * timevar.cc: ...here. * toplev.c: Moved to... * toplev.cc: ...here. * tracer.c: Moved to... * tracer.cc: ...here. * trans-mem.c: Moved to... * trans-mem.cc: ...here. * tree-affine.c: Moved to... * tree-affine.cc: ...here. * tree-call-cdce.c: Moved to... * tree-call-cdce.cc: ...here. * tree-cfg.c: Moved to... * tree-cfg.cc: ...here. * tree-cfgcleanup.c: Moved to... * tree-cfgcleanup.cc: ...here. * tree-chrec.c: Moved to... * tree-chrec.cc: ...here. * tree-complex.c: Moved to... * tree-complex.cc: ...here. * tree-data-ref.c: Moved to... * tree-data-ref.cc: ...here. * tree-dfa.c: Moved to... * tree-dfa.cc: ...here. * tree-diagnostic.c: Moved to... * tree-diagnostic.cc: ...here. * tree-dump.c: Moved to... * tree-dump.cc: ...here. * tree-eh.c: Moved to... * tree-eh.cc: ...here. * tree-emutls.c: Moved to... * tree-emutls.cc: ...here. * tree-if-conv.c: Moved to... * tree-if-conv.cc: ...here. * tree-inline.c: Moved to... * tree-inline.cc: ...here. * tree-into-ssa.c: Moved to... * tree-into-ssa.cc: ...here. * tree-iterator.c: Moved to... * tree-iterator.cc: ...here. * tree-loop-distribution.c: Moved to... * tree-loop-distribution.cc: ...here. * tree-nested.c: Moved to... * tree-nested.cc: ...here. * tree-nrv.c: Moved to... * tree-nrv.cc: ...here. * tree-object-size.c: Moved to... * tree-object-size.cc: ...here. * tree-outof-ssa.c: Moved to... * tree-outof-ssa.cc: ...here. * tree-parloops.c: Moved to... * tree-parloops.cc: ...here. * tree-phinodes.c: Moved to... * tree-phinodes.cc: ...here. * tree-predcom.c: Moved to... * tree-predcom.cc: ...here. * tree-pretty-print.c: Moved to... * tree-pretty-print.cc: ...here. * tree-profile.c: Moved to... * tree-profile.cc: ...here. * tree-scalar-evolution.c: Moved to... * tree-scalar-evolution.cc: ...here. * tree-sra.c: Moved to... * tree-sra.cc: ...here. * tree-ssa-address.c: Moved to... * tree-ssa-address.cc: ...here. * tree-ssa-alias.c: Moved to... * tree-ssa-alias.cc: ...here. * tree-ssa-ccp.c: Moved to... * tree-ssa-ccp.cc: ...here. * tree-ssa-coalesce.c: Moved to... * tree-ssa-coalesce.cc: ...here. * tree-ssa-copy.c: Moved to... * tree-ssa-copy.cc: ...here. * tree-ssa-dce.c: Moved to... * tree-ssa-dce.cc: ...here. * tree-ssa-dom.c: Moved to... * tree-ssa-dom.cc: ...here. * tree-ssa-dse.c: Moved to... * tree-ssa-dse.cc: ...here. * tree-ssa-forwprop.c: Moved to... * tree-ssa-forwprop.cc: ...here. * tree-ssa-ifcombine.c: Moved to... * tree-ssa-ifcombine.cc: ...here. * tree-ssa-live.c: Moved to... * tree-ssa-live.cc: ...here. * tree-ssa-loop-ch.c: Moved to... * tree-ssa-loop-ch.cc: ...here. * tree-ssa-loop-im.c: Moved to... * tree-ssa-loop-im.cc: ...here. * tree-ssa-loop-ivcanon.c: Moved to... * tree-ssa-loop-ivcanon.cc: ...here. * tree-ssa-loop-ivopts.c: Moved to... * tree-ssa-loop-ivopts.cc: ...here. * tree-ssa-loop-manip.c: Moved to... * tree-ssa-loop-manip.cc: ...here. * tree-ssa-loop-niter.c: Moved to... * tree-ssa-loop-niter.cc: ...here. * tree-ssa-loop-prefetch.c: Moved to... * tree-ssa-loop-prefetch.cc: ...here. * tree-ssa-loop-split.c: Moved to... * tree-ssa-loop-split.cc: ...here. * tree-ssa-loop-unswitch.c: Moved to... * tree-ssa-loop-unswitch.cc: ...here. * tree-ssa-loop.c: Moved to... * tree-ssa-loop.cc: ...here. * tree-ssa-math-opts.c: Moved to... * tree-ssa-math-opts.cc: ...here. * tree-ssa-operands.c: Moved to... * tree-ssa-operands.cc: ...here. * tree-ssa-phiopt.c: Moved to... * tree-ssa-phiopt.cc: ...here. * tree-ssa-phiprop.c: Moved to... * tree-ssa-phiprop.cc: ...here. * tree-ssa-pre.c: Moved to... * tree-ssa-pre.cc: ...here. * tree-ssa-propagate.c: Moved to... * tree-ssa-propagate.cc: ...here. * tree-ssa-reassoc.c: Moved to... * tree-ssa-reassoc.cc: ...here. * tree-ssa-sccvn.c: Moved to... * tree-ssa-sccvn.cc: ...here. * tree-ssa-scopedtables.c: Moved to... * tree-ssa-scopedtables.cc: ...here. * tree-ssa-sink.c: Moved to... * tree-ssa-sink.cc: ...here. * tree-ssa-strlen.c: Moved to... * tree-ssa-strlen.cc: ...here. * tree-ssa-structalias.c: Moved to... * tree-ssa-structalias.cc: ...here. * tree-ssa-tail-merge.c: Moved to... * tree-ssa-tail-merge.cc: ...here. * tree-ssa-ter.c: Moved to... * tree-ssa-ter.cc: ...here. * tree-ssa-threadbackward.c: Moved to... * tree-ssa-threadbackward.cc: ...here. * tree-ssa-threadedge.c: Moved to... * tree-ssa-threadedge.cc: ...here. * tree-ssa-threadupdate.c: Moved to... * tree-ssa-threadupdate.cc: ...here. * tree-ssa-uncprop.c: Moved to... * tree-ssa-uncprop.cc: ...here. * tree-ssa-uninit.c: Moved to... * tree-ssa-uninit.cc: ...here. * tree-ssa.c: Moved to... * tree-ssa.cc: ...here. * tree-ssanames.c: Moved to... * tree-ssanames.cc: ...here. * tree-stdarg.c: Moved to... * tree-stdarg.cc: ...here. * tree-streamer-in.c: Moved to... * tree-streamer-in.cc: ...here. * tree-streamer-out.c: Moved to... * tree-streamer-out.cc: ...here. * tree-streamer.c: Moved to... * tree-streamer.cc: ...here. * tree-switch-conversion.c: Moved to... * tree-switch-conversion.cc: ...here. * tree-tailcall.c: Moved to... * tree-tailcall.cc: ...here. * tree-vect-data-refs.c: Moved to... * tree-vect-data-refs.cc: ...here. * tree-vect-generic.c: Moved to... * tree-vect-generic.cc: ...here. * tree-vect-loop-manip.c: Moved to... * tree-vect-loop-manip.cc: ...here. * tree-vect-loop.c: Moved to... * tree-vect-loop.cc: ...here. * tree-vect-patterns.c: Moved to... * tree-vect-patterns.cc: ...here. * tree-vect-slp-patterns.c: Moved to... * tree-vect-slp-patterns.cc: ...here. * tree-vect-slp.c: Moved to... * tree-vect-slp.cc: ...here. * tree-vect-stmts.c: Moved to... * tree-vect-stmts.cc: ...here. * tree-vector-builder.c: Moved to... * tree-vector-builder.cc: ...here. * tree-vectorizer.c: Moved to... * tree-vectorizer.cc: ...here. * tree-vrp.c: Moved to... * tree-vrp.cc: ...here. * tree.c: Moved to... * tree.cc: ...here. * tsan.c: Moved to... * tsan.cc: ...here. * typed-splay-tree.c: Moved to... * typed-splay-tree.cc: ...here. * ubsan.c: Moved to... * ubsan.cc: ...here. * valtrack.c: Moved to... * valtrack.cc: ...here. * value-prof.c: Moved to... * value-prof.cc: ...here. * var-tracking.c: Moved to... * var-tracking.cc: ...here. * varasm.c: Moved to... * varasm.cc: ...here. * varpool.c: Moved to... * varpool.cc: ...here. * vec-perm-indices.c: Moved to... * vec-perm-indices.cc: ...here. * vec.c: Moved to... * vec.cc: ...here. * vmsdbgout.c: Moved to... * vmsdbgout.cc: ...here. * vr-values.c: Moved to... * vr-values.cc: ...here. * vtable-verify.c: Moved to... * vtable-verify.cc: ...here. * web.c: Moved to... * web.cc: ...here. * xcoffout.c: Moved to... * xcoffout.cc: ...here. gcc/c-family/ChangeLog: * c-ada-spec.c: Moved to... * c-ada-spec.cc: ...here. * c-attribs.c: Moved to... * c-attribs.cc: ...here. * c-common.c: Moved to... * c-common.cc: ...here. * c-cppbuiltin.c: Moved to... * c-cppbuiltin.cc: ...here. * c-dump.c: Moved to... * c-dump.cc: ...here. * c-format.c: Moved to... * c-format.cc: ...here. * c-gimplify.c: Moved to... * c-gimplify.cc: ...here. * c-indentation.c: Moved to... * c-indentation.cc: ...here. * c-lex.c: Moved to... * c-lex.cc: ...here. * c-omp.c: Moved to... * c-omp.cc: ...here. * c-opts.c: Moved to... * c-opts.cc: ...here. * c-pch.c: Moved to... * c-pch.cc: ...here. * c-ppoutput.c: Moved to... * c-ppoutput.cc: ...here. * c-pragma.c: Moved to... * c-pragma.cc: ...here. * c-pretty-print.c: Moved to... * c-pretty-print.cc: ...here. * c-semantics.c: Moved to... * c-semantics.cc: ...here. * c-ubsan.c: Moved to... * c-ubsan.cc: ...here. * c-warn.c: Moved to... * c-warn.cc: ...here. * cppspec.c: Moved to... * cppspec.cc: ...here. * stub-objc.c: Moved to... * stub-objc.cc: ...here. gcc/c/ChangeLog: * c-aux-info.c: Moved to... * c-aux-info.cc: ...here. * c-convert.c: Moved to... * c-convert.cc: ...here. * c-decl.c: Moved to... * c-decl.cc: ...here. * c-errors.c: Moved to... * c-errors.cc: ...here. * c-fold.c: Moved to... * c-fold.cc: ...here. * c-lang.c: Moved to... * c-lang.cc: ...here. * c-objc-common.c: Moved to... * c-objc-common.cc: ...here. * c-parser.c: Moved to... * c-parser.cc: ...here. * c-typeck.c: Moved to... * c-typeck.cc: ...here. * gccspec.c: Moved to... * gccspec.cc: ...here. * gimple-parser.c: Moved to... * gimple-parser.cc: ...here. gcc/cp/ChangeLog: * call.c: Moved to... * call.cc: ...here. * class.c: Moved to... * class.cc: ...here. * constexpr.c: Moved to... * constexpr.cc: ...here. * cp-gimplify.c: Moved to... * cp-gimplify.cc: ...here. * cp-lang.c: Moved to... * cp-lang.cc: ...here. * cp-objcp-common.c: Moved to... * cp-objcp-common.cc: ...here. * cp-ubsan.c: Moved to... * cp-ubsan.cc: ...here. * cvt.c: Moved to... * cvt.cc: ...here. * cxx-pretty-print.c: Moved to... * cxx-pretty-print.cc: ...here. * decl.c: Moved to... * decl.cc: ...here. * decl2.c: Moved to... * decl2.cc: ...here. * dump.c: Moved to... * dump.cc: ...here. * error.c: Moved to... * error.cc: ...here. * except.c: Moved to... * except.cc: ...here. * expr.c: Moved to... * expr.cc: ...here. * friend.c: Moved to... * friend.cc: ...here. * g++spec.c: Moved to... * g++spec.cc: ...here. * init.c: Moved to... * init.cc: ...here. * lambda.c: Moved to... * lambda.cc: ...here. * lex.c: Moved to... * lex.cc: ...here. * mangle.c: Moved to... * mangle.cc: ...here. * method.c: Moved to... * method.cc: ...here. * name-lookup.c: Moved to... * name-lookup.cc: ...here. * optimize.c: Moved to... * optimize.cc: ...here. * parser.c: Moved to... * parser.cc: ...here. * pt.c: Moved to... * pt.cc: ...here. * ptree.c: Moved to... * ptree.cc: ...here. * rtti.c: Moved to... * rtti.cc: ...here. * search.c: Moved to... * search.cc: ...here. * semantics.c: Moved to... * semantics.cc: ...here. * tree.c: Moved to... * tree.cc: ...here. * typeck.c: Moved to... * typeck.cc: ...here. * typeck2.c: Moved to... * typeck2.cc: ...here. * vtable-class-hierarchy.c: Moved to... * vtable-class-hierarchy.cc: ...here. gcc/fortran/ChangeLog: * arith.c: Moved to... * arith.cc: ...here. * array.c: Moved to... * array.cc: ...here. * bbt.c: Moved to... * bbt.cc: ...here. * check.c: Moved to... * check.cc: ...here. * class.c: Moved to... * class.cc: ...here. * constructor.c: Moved to... * constructor.cc: ...here. * convert.c: Moved to... * convert.cc: ...here. * cpp.c: Moved to... * cpp.cc: ...here. * data.c: Moved to... * data.cc: ...here. * decl.c: Moved to... * decl.cc: ...here. * dependency.c: Moved to... * dependency.cc: ...here. * dump-parse-tree.c: Moved to... * dump-parse-tree.cc: ...here. * error.c: Moved to... * error.cc: ...here. * expr.c: Moved to... * expr.cc: ...here. * f95-lang.c: Moved to... * f95-lang.cc: ...here. * frontend-passes.c: Moved to... * frontend-passes.cc: ...here. * gfortranspec.c: Moved to... * gfortranspec.cc: ...here. * interface.c: Moved to... * interface.cc: ...here. * intrinsic.c: Moved to... * intrinsic.cc: ...here. * io.c: Moved to... * io.cc: ...here. * iresolve.c: Moved to... * iresolve.cc: ...here. * match.c: Moved to... * match.cc: ...here. * matchexp.c: Moved to... * matchexp.cc: ...here. * misc.c: Moved to... * misc.cc: ...here. * module.c: Moved to... * module.cc: ...here. * openmp.c: Moved to... * openmp.cc: ...here. * options.c: Moved to... * options.cc: ...here. * parse.c: Moved to... * parse.cc: ...here. * primary.c: Moved to... * primary.cc: ...here. * resolve.c: Moved to... * resolve.cc: ...here. * scanner.c: Moved to... * scanner.cc: ...here. * simplify.c: Moved to... * simplify.cc: ...here. * st.c: Moved to... * st.cc: ...here. * symbol.c: Moved to... * symbol.cc: ...here. * target-memory.c: Moved to... * target-memory.cc: ...here. * trans-array.c: Moved to... * trans-array.cc: ...here. * trans-common.c: Moved to... * trans-common.cc: ...here. * trans-const.c: Moved to... * trans-const.cc: ...here. * trans-decl.c: Moved to... * trans-decl.cc: ...here. * trans-expr.c: Moved to... * trans-expr.cc: ...here. * trans-intrinsic.c: Moved to... * trans-intrinsic.cc: ...here. * trans-io.c: Moved to... * trans-io.cc: ...here. * trans-openmp.c: Moved to... * trans-openmp.cc: ...here. * trans-stmt.c: Moved to... * trans-stmt.cc: ...here. * trans-types.c: Moved to... * trans-types.cc: ...here. * trans.c: Moved to... * trans.cc: ...here. gcc/go/ChangeLog: * go-backend.c: Moved to... * go-backend.cc: ...here. * go-lang.c: Moved to... * go-lang.cc: ...here. * gospec.c: Moved to... * gospec.cc: ...here. gcc/jit/ChangeLog: * dummy-frontend.c: Moved to... * dummy-frontend.cc: ...here. * jit-builtins.c: Moved to... * jit-builtins.cc: ...here. * jit-logging.c: Moved to... * jit-logging.cc: ...here. * jit-playback.c: Moved to... * jit-playback.cc: ...here. * jit-recording.c: Moved to... * jit-recording.cc: ...here. * jit-result.c: Moved to... * jit-result.cc: ...here. * jit-spec.c: Moved to... * jit-spec.cc: ...here. * jit-tempdir.c: Moved to... * jit-tempdir.cc: ...here. * jit-w32.c: Moved to... * jit-w32.cc: ...here. * libgccjit.c: Moved to... * libgccjit.cc: ...here. gcc/lto/ChangeLog: * common.c: Moved to... * common.cc: ...here. * lto-common.c: Moved to... * 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author: Martin Liska <mliska@suse.cz> 2022-01-14 16:56:44 +0100
committer: Martin Liska <mliska@suse.cz> 2022-01-17 22:12:04 +0100
commit: 5c69acb32329d49e58c26fa41ae74229a52b9106 (patch)
tree: ddb05f9d73afb6f998457d2ac4b720e3b3b60483 /gcc/tree-ssa-tail-merge.c
parent: 490e23032baaece71f2ec09fa1805064b150fbc2 (diff)
download: gcc-5c69acb32329d49e58c26fa41ae74229a52b9106.zip
gcc-5c69acb32329d49e58c26fa41ae74229a52b9106.tar.gz
gcc-5c69acb32329d49e58c26fa41ae74229a52b9106.tar.bz2
1 files changed, 0 insertions, 1818 deletions
diff --git a/gcc/tree-ssa-tail-merge.c b/gcc/tree-ssa-tail-merge.c
deleted file mode 100644
index 8e1ea1a..0000000
--- a/gcc/tree-ssa-tail-merge.c
+++ /dev/null
@@ -1,1818 +0,0 @@
-/* Tail merging for gimple.
-   Copyright (C) 2011-2022 Free Software Foundation, Inc.
-   Contributed by Tom de Vries (tom@codesourcery.com)
-
-This file is part of GCC.
-
-GCC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 3, or (at your option)
-any later version.
-
-GCC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING3.  If not see
-<http://www.gnu.org/licenses/>.  */
-
-/* Pass overview.
-
-
-   MOTIVATIONAL EXAMPLE
-
-   gimple representation of gcc/testsuite/gcc.dg/pr43864.c at
-
-   hprofStartupp (charD.1 * outputFileNameD.2600, charD.1 * ctxD.2601)
-   {
-     struct FILED.1638 * fpD.2605;
-     charD.1 fileNameD.2604[1000];
-     intD.0 D.3915;
-     const charD.1 * restrict outputFileName.0D.3914;
-
-     # BLOCK 2 freq:10000
-     # PRED: ENTRY [100.0%]  (fallthru,exec)
-     # PT = nonlocal { D.3926 } (restr)
-     outputFileName.0D.3914_3
-       = (const charD.1 * restrict) outputFileNameD.2600_2(D);
-     # .MEMD.3923_13 = VDEF <.MEMD.3923_12(D)>
-     # USE = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     # CLB = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     sprintfD.759 (&fileNameD.2604, outputFileName.0D.3914_3);
-     # .MEMD.3923_14 = VDEF <.MEMD.3923_13>
-     # USE = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     # CLB = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     D.3915_4 = accessD.2606 (&fileNameD.2604, 1);
-     if (D.3915_4 == 0)
-       goto <bb 3>;
-     else
-       goto <bb 4>;
-     # SUCC: 3 [10.0%]  (true,exec) 4 [90.0%]  (false,exec)
-
-     # BLOCK 3 freq:1000
-     # PRED: 2 [10.0%]  (true,exec)
-     # .MEMD.3923_15 = VDEF <.MEMD.3923_14>
-     # USE = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     # CLB = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     freeD.898 (ctxD.2601_5(D));
-     goto <bb 7>;
-     # SUCC: 7 [100.0%]  (fallthru,exec)
-
-     # BLOCK 4 freq:9000
-     # PRED: 2 [90.0%]  (false,exec)
-     # .MEMD.3923_16 = VDEF <.MEMD.3923_14>
-     # PT = nonlocal escaped
-     # USE = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     # CLB = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     fpD.2605_8 = fopenD.1805 (&fileNameD.2604[0], 0B);
-     if (fpD.2605_8 == 0B)
-       goto <bb 5>;
-     else
-       goto <bb 6>;
-     # SUCC: 5 [1.9%]  (true,exec) 6 [98.1%]  (false,exec)
-
-     # BLOCK 5 freq:173
-     # PRED: 4 [1.9%]  (true,exec)
-     # .MEMD.3923_17 = VDEF <.MEMD.3923_16>
-     # USE = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     # CLB = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     freeD.898 (ctxD.2601_5(D));
-     goto <bb 7>;
-     # SUCC: 7 [100.0%]  (fallthru,exec)
-
-     # BLOCK 6 freq:8827
-     # PRED: 4 [98.1%]  (false,exec)
-     # .MEMD.3923_18 = VDEF <.MEMD.3923_16>
-     # USE = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     # CLB = nonlocal null { fileNameD.2604 D.3926 } (restr)
-     fooD.2599 (outputFileNameD.2600_2(D), fpD.2605_8);
-     # SUCC: 7 [100.0%]  (fallthru,exec)
-
-     # BLOCK 7 freq:10000
-     # PRED: 3 [100.0%]  (fallthru,exec) 5 [100.0%]  (fallthru,exec)
-	     6 [100.0%]  (fallthru,exec)
-     # PT = nonlocal null
-
-     # ctxD.2601_1 = PHI <0B(3), 0B(5), ctxD.2601_5(D)(6)>
-     # .MEMD.3923_11 = PHI <.MEMD.3923_15(3), .MEMD.3923_17(5),
-			    .MEMD.3923_18(6)>
-     # VUSE <.MEMD.3923_11>
-     return ctxD.2601_1;
-     # SUCC: EXIT [100.0%]
-   }
-
-   bb 3 and bb 5 can be merged.  The blocks have different predecessors, but the
-   same successors, and the same operations.
-
-
-   CONTEXT
-
-   A technique called tail merging (or cross jumping) can fix the example
-   above.  For a block, we look for common code at the end (the tail) of the
-   predecessor blocks, and insert jumps from one block to the other.
-   The example is a special case for tail merging, in that 2 whole blocks
-   can be merged, rather than just the end parts of it.
-   We currently only focus on whole block merging, so in that sense
-   calling this pass tail merge is a bit of a misnomer.
-
-   We distinguish 2 kinds of situations in which blocks can be merged:
-   - same operations, same predecessors.  The successor edges coming from one
-     block are redirected to come from the other block.
-   - same operations, same successors.  The predecessor edges entering one block
-     are redirected to enter the other block.  Note that this operation might
-     involve introducing phi operations.
-
-   For efficient implementation, we would like to value numbers the blocks, and
-   have a comparison operator that tells us whether the blocks are equal.
-   Besides being runtime efficient, block value numbering should also abstract
-   from irrelevant differences in order of operations, much like normal value
-   numbering abstracts from irrelevant order of operations.
-
-   For the first situation (same_operations, same predecessors), normal value
-   numbering fits well.  We can calculate a block value number based on the
-   value numbers of the defs and vdefs.
-
-   For the second situation (same operations, same successors), this approach
-   doesn't work so well.  We can illustrate this using the example.  The calls
-   to free use different vdefs: MEMD.3923_16 and MEMD.3923_14, and these will
-   remain different in value numbering, since they represent different memory
-   states.  So the resulting vdefs of the frees will be different in value
-   numbering, so the block value numbers will be different.
-
-   The reason why we call the blocks equal is not because they define the same
-   values, but because uses in the blocks use (possibly different) defs in the
-   same way.  To be able to detect this efficiently, we need to do some kind of
-   reverse value numbering, meaning number the uses rather than the defs, and
-   calculate a block value number based on the value number of the uses.
-   Ideally, a block comparison operator will also indicate which phis are needed
-   to merge the blocks.
-
-   For the moment, we don't do block value numbering, but we do insn-by-insn
-   matching, using scc value numbers to match operations with results, and
-   structural comparison otherwise, while ignoring vop mismatches.
-
-
-   IMPLEMENTATION
-
-   1. The pass first determines all groups of blocks with the same successor
-      blocks.
-   2. Within each group, it tries to determine clusters of equal basic blocks.
-   3. The clusters are applied.
-   4. The same successor groups are updated.
-   5. This process is repeated from 2 onwards, until no more changes.
-
-
-   LIMITATIONS/TODO
-
-   - block only
-   - handles only 'same operations, same successors'.
-     It handles same predecessors as a special subcase though.
-   - does not implement the reverse value numbering and block value numbering.
-   - improve memory allocation: use garbage collected memory, obstacks,
-     allocpools where appropriate.
-   - no insertion of gimple_reg phis,  We only introduce vop-phis.
-   - handle blocks with gimple_reg phi_nodes.
-
-
-   PASS PLACEMENT
-   This 'pass' is not a stand-alone gimple pass, but runs as part of
-   pass_pre, in order to share the value numbering.
-
-
-   SWITCHES
-
-   - ftree-tail-merge.  On at -O2.  We may have to enable it only at -Os.  */
-
-#include "config.h"
-#include "system.h"
-#include "coretypes.h"
-#include "backend.h"
-#include "tree.h"
-#include "gimple.h"
-#include "cfghooks.h"
-#include "tree-pass.h"
-#include "ssa.h"
-#include "fold-const.h"
-#include "trans-mem.h"
-#include "cfganal.h"
-#include "cfgcleanup.h"
-#include "gimple-iterator.h"
-#include "tree-cfg.h"
-#include "tree-into-ssa.h"
-#include "tree-ssa-sccvn.h"
-#include "cfgloop.h"
-#include "tree-eh.h"
-#include "tree-cfgcleanup.h"
-
-const int ignore_edge_flags = EDGE_DFS_BACK | EDGE_EXECUTABLE;
-
-/* Describes a group of bbs with the same successors.  The successor bbs are
-   cached in succs, and the successor edge flags are cached in succ_flags.
-   If a bb has the EDGE_TRUE/FALSE_VALUE flags swapped compared to succ_flags,
-   it's marked in inverse.
-   Additionally, the hash value for the struct is cached in hashval, and
-   in_worklist indicates whether it's currently part of worklist.  */
-
-struct same_succ : pointer_hash <same_succ>
-{
-  /* The bbs that have the same successor bbs.  */
-  bitmap bbs;
-  /* The successor bbs.  */
-  bitmap succs;
-  /* Indicates whether the EDGE_TRUE/FALSE_VALUEs of succ_flags are swapped for
-     bb.  */
-  bitmap inverse;
-  /* The edge flags for each of the successor bbs.  */
-  vec<int> succ_flags;
-  /* Indicates whether the struct is currently in the worklist.  */
-  bool in_worklist;
-  /* The hash value of the struct.  */
-  hashval_t hashval;
-
-  /* hash_table support.  */
-  static inline hashval_t hash (const same_succ *);
-  static int equal (const same_succ *, const same_succ *);
-  static void remove (same_succ *);
-};
-
-/* hash routine for hash_table support, returns hashval of E.  */
-
-inline hashval_t
-same_succ::hash (const same_succ *e)
-{
-  return e->hashval;
-}
-
-/* A group of bbs where 1 bb from bbs can replace the other bbs.  */
-
-struct bb_cluster
-{
-  /* The bbs in the cluster.  */
-  bitmap bbs;
-  /* The preds of the bbs in the cluster.  */
-  bitmap preds;
-  /* Index in all_clusters vector.  */
-  int index;
-  /* The bb to replace the cluster with.  */
-  basic_block rep_bb;
-};
-
-/* Per bb-info.  */
-
-struct aux_bb_info
-{
-  /* The number of non-debug statements in the bb.  */
-  int size;
-  /* The same_succ that this bb is a member of.  */
-  same_succ *bb_same_succ;
-  /* The cluster that this bb is a member of.  */
-  bb_cluster *cluster;
-  /* The vop state at the exit of a bb.  This is shortlived data, used to
-     communicate data between update_block_by and update_vuses.  */
-  tree vop_at_exit;
-  /* The bb that either contains or is dominated by the dependencies of the
-     bb.  */
-  basic_block dep_bb;
-};
-
-/* Macros to access the fields of struct aux_bb_info.  */
-
-#define BB_SIZE(bb) (((struct aux_bb_info *)bb->aux)->size)
-#define BB_SAME_SUCC(bb) (((struct aux_bb_info *)bb->aux)->bb_same_succ)
-#define BB_CLUSTER(bb) (((struct aux_bb_info *)bb->aux)->cluster)
-#define BB_VOP_AT_EXIT(bb) (((struct aux_bb_info *)bb->aux)->vop_at_exit)
-#define BB_DEP_BB(bb) (((struct aux_bb_info *)bb->aux)->dep_bb)
-
-/* Valueization helper querying the VN lattice.  */
-
-static tree
-tail_merge_valueize (tree name)
-{
-  if (TREE_CODE (name) == SSA_NAME
-      && has_VN_INFO (name))
-    {
-      tree tem = VN_INFO (name)->valnum;
-      if (tem != VN_TOP)
-	return tem;
-    }
-  return name;
-}
-
-/* Returns true if the only effect a statement STMT has, is to define locally
-   used SSA_NAMEs.  */
-
-static bool
-stmt_local_def (gimple *stmt)
-{
-  basic_block bb, def_bb;
-  imm_use_iterator iter;
-  use_operand_p use_p;
-  tree val;
-  def_operand_p def_p;
-
-  if (gimple_vdef (stmt) != NULL_TREE
-      || gimple_has_side_effects (stmt)
-      || gimple_could_trap_p_1 (stmt, false, false)
-      || gimple_vuse (stmt) != NULL_TREE
-      /* Copied from tree-ssa-ifcombine.c:bb_no_side_effects_p():
-	 const calls don't match any of the above, yet they could
-	 still have some side-effects - they could contain
-	 gimple_could_trap_p statements, like floating point
-	 exceptions or integer division by zero.  See PR70586.
-	 FIXME: perhaps gimple_has_side_effects or gimple_could_trap_p
-	 should handle this.  */
-      || is_gimple_call (stmt))
-    return false;
-
-  def_p = SINGLE_SSA_DEF_OPERAND (stmt, SSA_OP_DEF);
-  if (def_p == NULL)
-    return false;
-
-  val = DEF_FROM_PTR (def_p);
-  if (val == NULL_TREE || TREE_CODE (val) != SSA_NAME)
-    return false;
-
-  def_bb = gimple_bb (stmt);
-
-  FOR_EACH_IMM_USE_FAST (use_p, iter, val)
-    {
-      if (is_gimple_debug (USE_STMT (use_p)))
-	continue;
-      bb = gimple_bb (USE_STMT (use_p));
-      if (bb == def_bb)
-	continue;
-
-      if (gimple_code (USE_STMT (use_p)) == GIMPLE_PHI
-	  && EDGE_PRED (bb, PHI_ARG_INDEX_FROM_USE (use_p))->src == def_bb)
-	continue;
-
-      return false;
-    }
-
-  return true;
-}
-
-/* Let GSI skip forwards over local defs.  */
-
-static void
-gsi_advance_fw_nondebug_nonlocal (gimple_stmt_iterator *gsi)
-{
-  gimple *stmt;
-
-  while (true)
-    {
-      if (gsi_end_p (*gsi))
-	return;
-      stmt = gsi_stmt (*gsi);
-      if (!stmt_local_def (stmt))
-	return;
-      gsi_next_nondebug (gsi);
-    }
-}
-
-/* VAL1 and VAL2 are either:
-   - uses in BB1 and BB2, or
-   - phi alternatives for BB1 and BB2.
-   Return true if the uses have the same gvn value.  */
-
-static bool
-gvn_uses_equal (tree val1, tree val2)
-{
-  gcc_checking_assert (val1 != NULL_TREE && val2 != NULL_TREE);
-
-  if (val1 == val2)
-    return true;
-
-  if (tail_merge_valueize (val1) != tail_merge_valueize (val2))
-    return false;
-
-  return ((TREE_CODE (val1) == SSA_NAME || CONSTANT_CLASS_P (val1))
-	  && (TREE_CODE (val2) == SSA_NAME || CONSTANT_CLASS_P (val2)));
-}
-
-/* Prints E to FILE.  */
-
-static void
-same_succ_print (FILE *file, const same_succ *e)
-{
-  unsigned int i;
-  bitmap_print (file, e->bbs, "bbs:", "\n");
-  bitmap_print (file, e->succs, "succs:", "\n");
-  bitmap_print (file, e->inverse, "inverse:", "\n");
-  fprintf (file, "flags:");
-  for (i = 0; i < e->succ_flags.length (); ++i)
-    fprintf (file, " %x", e->succ_flags[i]);
-  fprintf (file, "\n");
-}
-
-/* Prints same_succ VE to VFILE.  */
-
-inline int
-ssa_same_succ_print_traverse (same_succ **pe, FILE *file)
-{
-  const same_succ *e = *pe;
-  same_succ_print (file, e);
-  return 1;
-}
-
-/* Update BB_DEP_BB (USE_BB), given a use of VAL in USE_BB.  */
-
-static void
-update_dep_bb (basic_block use_bb, tree val)
-{
-  basic_block dep_bb;
-
-  /* Not a dep.  */
-  if (TREE_CODE (val) != SSA_NAME)
-    return;
-
-  /* Skip use of global def.  */
-  if (SSA_NAME_IS_DEFAULT_DEF (val))
-    return;
-
-  /* Skip use of local def.  */
-  dep_bb = gimple_bb (SSA_NAME_DEF_STMT (val));
-  if (dep_bb == use_bb)
-    return;
-
-  if (BB_DEP_BB (use_bb) == NULL
-      || dominated_by_p (CDI_DOMINATORS, dep_bb, BB_DEP_BB (use_bb)))
-    BB_DEP_BB (use_bb) = dep_bb;
-}
-
-/* Update BB_DEP_BB, given the dependencies in STMT.  */
-
-static void
-stmt_update_dep_bb (gimple *stmt)
-{
-  ssa_op_iter iter;
-  use_operand_p use;
-
-  FOR_EACH_SSA_USE_OPERAND (use, stmt, iter, SSA_OP_USE)
-    update_dep_bb (gimple_bb (stmt), USE_FROM_PTR (use));
-}
-
-/* Calculates hash value for same_succ VE.  */
-
-static hashval_t
-same_succ_hash (const same_succ *e)
-{
-  inchash::hash hstate (bitmap_hash (e->succs));
-  int flags;
-  unsigned int i;
-  unsigned int first = bitmap_first_set_bit (e->bbs);
-  basic_block bb = BASIC_BLOCK_FOR_FN (cfun, first);
-  int size = 0;
-  gimple *stmt;
-  tree arg;
-  unsigned int s;
-  bitmap_iterator bs;
-
-  for (gimple_stmt_iterator gsi = gsi_start_nondebug_bb (bb);
-       !gsi_end_p (gsi); gsi_next_nondebug (&gsi))
-    {
-      stmt = gsi_stmt (gsi);
-      stmt_update_dep_bb (stmt);
-      if (stmt_local_def (stmt))
-	continue;
-      size++;
-
-      hstate.add_int (gimple_code (stmt));
-      if (is_gimple_assign (stmt))
-	hstate.add_int (gimple_assign_rhs_code (stmt));
-      if (!is_gimple_call (stmt))
-	continue;
-      if (gimple_call_internal_p (stmt))
-	hstate.add_int (gimple_call_internal_fn (stmt));
-      else
-	{
-	  inchash::add_expr (gimple_call_fn (stmt), hstate);
-	  if (gimple_call_chain (stmt))
-	    inchash::add_expr (gimple_call_chain (stmt), hstate);
-	}
-      for (i = 0; i < gimple_call_num_args (stmt); i++)
-	{
-	  arg = gimple_call_arg (stmt, i);
-	  arg = tail_merge_valueize (arg);
-	  inchash::add_expr (arg, hstate);
-	}
-    }
-
-  hstate.add_int (size);
-  BB_SIZE (bb) = size;
-
-  hstate.add_int (bb->loop_father->num);
-
-  for (i = 0; i < e->succ_flags.length (); ++i)
-    {
-      flags = e->succ_flags[i];
-      flags = flags & ~(EDGE_TRUE_VALUE | EDGE_FALSE_VALUE);
-      hstate.add_int (flags);
-    }
-
-  EXECUTE_IF_SET_IN_BITMAP (e->succs, 0, s, bs)
-    {
-      int n = find_edge (bb, BASIC_BLOCK_FOR_FN (cfun, s))->dest_idx;
-      for (gphi_iterator gsi = gsi_start_phis (BASIC_BLOCK_FOR_FN (cfun, s));
-	   !gsi_end_p (gsi);
-	   gsi_next (&gsi))
-	{
-	  gphi *phi = gsi.phi ();
-	  tree lhs = gimple_phi_result (phi);
-	  tree val = gimple_phi_arg_def (phi, n);
-
-	  if (virtual_operand_p (lhs))
-	    continue;
-	  update_dep_bb (bb, val);
-	}
-    }
-
-  return hstate.end ();
-}
-
-/* Returns true if E1 and E2 have 2 successors, and if the successor flags
-   are inverse for the EDGE_TRUE_VALUE and EDGE_FALSE_VALUE flags, and equal for
-   the other edge flags.  */
-
-static bool
-inverse_flags (const same_succ *e1, const same_succ *e2)
-{
-  int f1a, f1b, f2a, f2b;
-  int mask = ~(EDGE_TRUE_VALUE | EDGE_FALSE_VALUE);
-
-  if (e1->succ_flags.length () != 2)
-    return false;
-
-  f1a = e1->succ_flags[0];
-  f1b = e1->succ_flags[1];
-  f2a = e2->succ_flags[0];
-  f2b = e2->succ_flags[1];
-
-  if (f1a == f2a && f1b == f2b)
-    return false;
-
-  return (f1a & mask) == (f2a & mask) && (f1b & mask) == (f2b & mask);
-}
-
-/* Compares SAME_SUCCs E1 and E2.  */
-
-int
-same_succ::equal (const same_succ *e1, const same_succ *e2)
-{
-  unsigned int i, first1, first2;
-  gimple_stmt_iterator gsi1, gsi2;
-  gimple *s1, *s2;
-  basic_block bb1, bb2;
-
-  if (e1 == e2)
-    return 1;
-
-  if (e1->hashval != e2->hashval)
-    return 0;
-
-  if (e1->succ_flags.length () != e2->succ_flags.length ())
-    return 0;
-
-  if (!bitmap_equal_p (e1->succs, e2->succs))
-    return 0;
-
-  if (!inverse_flags (e1, e2))
-    {
-      for (i = 0; i < e1->succ_flags.length (); ++i)
-	if (e1->succ_flags[i] != e2->succ_flags[i])
-	  return 0;
-    }
-
-  first1 = bitmap_first_set_bit (e1->bbs);
-  first2 = bitmap_first_set_bit (e2->bbs);
-
-  bb1 = BASIC_BLOCK_FOR_FN (cfun, first1);
-  bb2 = BASIC_BLOCK_FOR_FN (cfun, first2);
-
-  if (BB_SIZE (bb1) != BB_SIZE (bb2))
-    return 0;
-
-  if (bb1->loop_father != bb2->loop_father)
-    return 0;
-
-  gsi1 = gsi_start_nondebug_bb (bb1);
-  gsi2 = gsi_start_nondebug_bb (bb2);
-  gsi_advance_fw_nondebug_nonlocal (&gsi1);
-  gsi_advance_fw_nondebug_nonlocal (&gsi2);
-  while (!(gsi_end_p (gsi1) || gsi_end_p (gsi2)))
-    {
-      s1 = gsi_stmt (gsi1);
-      s2 = gsi_stmt (gsi2);
-      if (gimple_code (s1) != gimple_code (s2))
-	return 0;
-      if (is_gimple_call (s1) && !gimple_call_same_target_p (s1, s2))
-	return 0;
-      gsi_next_nondebug (&gsi1);
-      gsi_next_nondebug (&gsi2);
-      gsi_advance_fw_nondebug_nonlocal (&gsi1);
-      gsi_advance_fw_nondebug_nonlocal (&gsi2);
-    }
-
-  return 1;
-}
-
-/* Alloc and init a new SAME_SUCC.  */
-
-static same_succ *
-same_succ_alloc (void)
-{
-  same_succ *same = XNEW (struct same_succ);
-
-  same->bbs = BITMAP_ALLOC (NULL);
-  same->succs = BITMAP_ALLOC (NULL);
-  same->inverse = BITMAP_ALLOC (NULL);
-  same->succ_flags.create (10);
-  same->in_worklist = false;
-
-  return same;
-}
-
-/* Delete same_succ E.  */
-
-void
-same_succ::remove (same_succ *e)
-{
-  BITMAP_FREE (e->bbs);
-  BITMAP_FREE (e->succs);
-  BITMAP_FREE (e->inverse);
-  e->succ_flags.release ();
-
-  XDELETE (e);
-}
-
-/* Reset same_succ SAME.  */
-
-static void
-same_succ_reset (same_succ *same)
-{
-  bitmap_clear (same->bbs);
-  bitmap_clear (same->succs);
-  bitmap_clear (same->inverse);
-  same->succ_flags.truncate (0);
-}
-
-static hash_table<same_succ> *same_succ_htab;
-
-/* Array that is used to store the edge flags for a successor.  */
-
-static int *same_succ_edge_flags;
-
-/* Bitmap that is used to mark bbs that are recently deleted.  */
-
-static bitmap deleted_bbs;
-
-/* Bitmap that is used to mark predecessors of bbs that are
-   deleted.  */
-
-static bitmap deleted_bb_preds;
-
-/* Prints same_succ_htab to stderr.  */
-
-extern void debug_same_succ (void);
-DEBUG_FUNCTION void
-debug_same_succ ( void)
-{
-  same_succ_htab->traverse <FILE *, ssa_same_succ_print_traverse> (stderr);
-}
-
-
-/* Vector of bbs to process.  */
-
-static vec<same_succ *> worklist;
-
-/* Prints worklist to FILE.  */
-
-static void
-print_worklist (FILE *file)
-{
-  unsigned int i;
-  for (i = 0; i < worklist.length (); ++i)
-    same_succ_print (file, worklist[i]);
-}
-
-/* Adds SAME to worklist.  */
-
-static void
-add_to_worklist (same_succ *same)
-{
-  if (same->in_worklist)
-    return;
-
-  if (bitmap_count_bits (same->bbs) < 2)
-    return;
-
-  same->in_worklist = true;
-  worklist.safe_push (same);
-}
-
-/* Add BB to same_succ_htab.  */
-
-static void
-find_same_succ_bb (basic_block bb, same_succ **same_p)
-{
-  unsigned int j;
-  bitmap_iterator bj;
-  same_succ *same = *same_p;
-  same_succ **slot;
-  edge_iterator ei;
-  edge e;
-
-  if (bb == NULL)
-    return;
-  bitmap_set_bit (same->bbs, bb->index);
-  FOR_EACH_EDGE (e, ei, bb->succs)
-    {
-      int index = e->dest->index;
-      bitmap_set_bit (same->succs, index);
-      same_succ_edge_flags[index] = (e->flags & ~ignore_edge_flags);
-    }
-  EXECUTE_IF_SET_IN_BITMAP (same->succs, 0, j, bj)
-    same->succ_flags.safe_push (same_succ_edge_flags[j]);
-
-  same->hashval = same_succ_hash (same);
-
-  slot = same_succ_htab->find_slot_with_hash (same, same->hashval, INSERT);
-  if (*slot == NULL)
-    {
-      *slot = same;
-      BB_SAME_SUCC (bb) = same;
-      add_to_worklist (same);
-      *same_p = NULL;
-    }
-  else
-    {
-      bitmap_set_bit ((*slot)->bbs, bb->index);
-      BB_SAME_SUCC (bb) = *slot;
-      add_to_worklist (*slot);
-      if (inverse_flags (same, *slot))
-	bitmap_set_bit ((*slot)->inverse, bb->index);
-      same_succ_reset (same);
-    }
-}
-
-/* Find bbs with same successors.  */
-
-static void
-find_same_succ (void)
-{
-  same_succ *same = same_succ_alloc ();
-  basic_block bb;
-
-  FOR_EACH_BB_FN (bb, cfun)
-    {
-      find_same_succ_bb (bb, &same);
-      if (same == NULL)
-	same = same_succ_alloc ();
-    }
-
-  same_succ::remove (same);
-}
-
-/* Initializes worklist administration.  */
-
-static void
-init_worklist (void)
-{
-  alloc_aux_for_blocks (sizeof (struct aux_bb_info));
-  same_succ_htab = new hash_table<same_succ> (n_basic_blocks_for_fn (cfun));
-  same_succ_edge_flags = XCNEWVEC (int, last_basic_block_for_fn (cfun));
-  deleted_bbs = BITMAP_ALLOC (NULL);
-  deleted_bb_preds = BITMAP_ALLOC (NULL);
-  worklist.create (n_basic_blocks_for_fn (cfun));
-  find_same_succ ();
-
-  if (dump_file && (dump_flags & TDF_DETAILS))
-    {
-      fprintf (dump_file, "initial worklist:\n");
-      print_worklist (dump_file);
-    }
-}
-
-/* Deletes worklist administration.  */
-
-static void
-delete_worklist (void)
-{
-  free_aux_for_blocks ();
-  delete same_succ_htab;
-  same_succ_htab = NULL;
-  XDELETEVEC (same_succ_edge_flags);
-  same_succ_edge_flags = NULL;
-  BITMAP_FREE (deleted_bbs);
-  BITMAP_FREE (deleted_bb_preds);
-  worklist.release ();
-}
-
-/* Mark BB as deleted, and mark its predecessors.  */
-
-static void
-mark_basic_block_deleted (basic_block bb)
-{
-  edge e;
-  edge_iterator ei;
-
-  bitmap_set_bit (deleted_bbs, bb->index);
-
-  FOR_EACH_EDGE (e, ei, bb->preds)
-    bitmap_set_bit (deleted_bb_preds, e->src->index);
-}
-
-/* Removes BB from its corresponding same_succ.  */
-
-static void
-same_succ_flush_bb (basic_block bb)
-{
-  same_succ *same = BB_SAME_SUCC (bb);
-  if (! same)
-    return;
-
-  BB_SAME_SUCC (bb) = NULL;
-  if (bitmap_single_bit_set_p (same->bbs))
-    same_succ_htab->remove_elt_with_hash (same, same->hashval);
-  else
-    bitmap_clear_bit (same->bbs, bb->index);
-}
-
-/* Removes all bbs in BBS from their corresponding same_succ.  */
-
-static void
-same_succ_flush_bbs (bitmap bbs)
-{
-  unsigned int i;
-  bitmap_iterator bi;
-
-  EXECUTE_IF_SET_IN_BITMAP (bbs, 0, i, bi)
-    same_succ_flush_bb (BASIC_BLOCK_FOR_FN (cfun, i));
-}
-
-/* Release the last vdef in BB, either normal or phi result.  */
-
-static void
-release_last_vdef (basic_block bb)
-{
-  for (gimple_stmt_iterator i = gsi_last_bb (bb); !gsi_end_p (i);
-       gsi_prev_nondebug (&i))
-    {
-      gimple *stmt = gsi_stmt (i);
-      if (gimple_vdef (stmt) == NULL_TREE)
-	continue;
-
-      mark_virtual_operand_for_renaming (gimple_vdef (stmt));
-      return;
-    }
-
-  for (gphi_iterator i = gsi_start_phis (bb); !gsi_end_p (i);
-       gsi_next (&i))
-    {
-      gphi *phi = i.phi ();
-      tree res = gimple_phi_result (phi);
-
-      if (!virtual_operand_p (res))
-	continue;
-
-      mark_virtual_phi_result_for_renaming (phi);
-      return;
-    }
-}
-
-/* For deleted_bb_preds, find bbs with same successors.  */
-
-static void
-update_worklist (void)
-{
-  unsigned int i;
-  bitmap_iterator bi;
-  basic_block bb;
-  same_succ *same;
-
-  bitmap_and_compl_into (deleted_bb_preds, deleted_bbs);
-  bitmap_clear (deleted_bbs);
-
-  bitmap_clear_bit (deleted_bb_preds, ENTRY_BLOCK);
-  same_succ_flush_bbs (deleted_bb_preds);
-
-  same = same_succ_alloc ();
-  EXECUTE_IF_SET_IN_BITMAP (deleted_bb_preds, 0, i, bi)
-    {
-      bb = BASIC_BLOCK_FOR_FN (cfun, i);
-      gcc_assert (bb != NULL);
-      find_same_succ_bb (bb, &same);
-      if (same == NULL)
-	same = same_succ_alloc ();
-    }
-  same_succ::remove (same);
-  bitmap_clear (deleted_bb_preds);
-}
-
-/* Prints cluster C to FILE.  */
-
-static void
-print_cluster (FILE *file, bb_cluster *c)
-{
-  if (c == NULL)
-    return;
-  bitmap_print (file, c->bbs, "bbs:", "\n");
-  bitmap_print (file, c->preds, "preds:", "\n");
-}
-
-/* Prints cluster C to stderr.  */
-
-extern void debug_cluster (bb_cluster *);
-DEBUG_FUNCTION void
-debug_cluster (bb_cluster *c)
-{
-  print_cluster (stderr, c);
-}
-
-/* Update C->rep_bb, given that BB is added to the cluster.  */
-
-static void
-update_rep_bb (bb_cluster *c, basic_block bb)
-{
-  /* Initial.  */
-  if (c->rep_bb == NULL)
-    {
-      c->rep_bb = bb;
-      return;
-    }
-
-  /* Current needs no deps, keep it.  */
-  if (BB_DEP_BB (c->rep_bb) == NULL)
-    return;
-
-  /* Bb needs no deps, change rep_bb.  */
-  if (BB_DEP_BB (bb) == NULL)
-    {
-      c->rep_bb = bb;
-      return;
-    }
-
-  /* Bb needs last deps earlier than current, change rep_bb.  A potential
-     problem with this, is that the first deps might also be earlier, which
-     would mean we prefer longer lifetimes for the deps.  To be able to check
-     for this, we would have to trace BB_FIRST_DEP_BB as well, besides
-     BB_DEP_BB, which is really BB_LAST_DEP_BB.
-     The benefit of choosing the bb with last deps earlier, is that it can
-     potentially be used as replacement for more bbs.  */
-  if (dominated_by_p (CDI_DOMINATORS, BB_DEP_BB (c->rep_bb), BB_DEP_BB (bb)))
-    c->rep_bb = bb;
-}
-
-/* Add BB to cluster C.  Sets BB in C->bbs, and preds of BB in C->preds.  */
-
-static void
-add_bb_to_cluster (bb_cluster *c, basic_block bb)
-{
-  edge e;
-  edge_iterator ei;
-
-  bitmap_set_bit (c->bbs, bb->index);
-
-  FOR_EACH_EDGE (e, ei, bb->preds)
-    bitmap_set_bit (c->preds, e->src->index);
-
-  update_rep_bb (c, bb);
-}
-
-/* Allocate and init new cluster.  */
-
-static bb_cluster *
-new_cluster (void)
-{
-  bb_cluster *c;
-  c = XCNEW (bb_cluster);
-  c->bbs = BITMAP_ALLOC (NULL);
-  c->preds = BITMAP_ALLOC (NULL);
-  c->rep_bb = NULL;
-  return c;
-}
-
-/* Delete clusters.  */
-
-static void
-delete_cluster (bb_cluster *c)
-{
-  if (c == NULL)
-    return;
-  BITMAP_FREE (c->bbs);
-  BITMAP_FREE (c->preds);
-  XDELETE (c);
-}
-
-
-/* Array that contains all clusters.  */
-
-static vec<bb_cluster *> all_clusters;
-
-/* Allocate all cluster vectors.  */
-
-static void
-alloc_cluster_vectors (void)
-{
-  all_clusters.create (n_basic_blocks_for_fn (cfun));
-}
-
-/* Reset all cluster vectors.  */
-
-static void
-reset_cluster_vectors (void)
-{
-  unsigned int i;
-  basic_block bb;
-  for (i = 0; i < all_clusters.length (); ++i)
-    delete_cluster (all_clusters[i]);
-  all_clusters.truncate (0);
-  FOR_EACH_BB_FN (bb, cfun)
-    BB_CLUSTER (bb) = NULL;
-}
-
-/* Delete all cluster vectors.  */
-
-static void
-delete_cluster_vectors (void)
-{
-  unsigned int i;
-  for (i = 0; i < all_clusters.length (); ++i)
-    delete_cluster (all_clusters[i]);
-  all_clusters.release ();
-}
-
-/* Merge cluster C2 into C1.  */
-
-static void
-merge_clusters (bb_cluster *c1, bb_cluster *c2)
-{
-  bitmap_ior_into (c1->bbs, c2->bbs);
-  bitmap_ior_into (c1->preds, c2->preds);
-}
-
-/* Register equivalence of BB1 and BB2 (members of cluster C).  Store c in
-   all_clusters, or merge c with existing cluster.  */
-
-static void
-set_cluster (basic_block bb1, basic_block bb2)
-{
-  basic_block merge_bb, other_bb;
-  bb_cluster *merge, *old, *c;
-
-  if (BB_CLUSTER (bb1) == NULL && BB_CLUSTER (bb2) == NULL)
-    {
-      c = new_cluster ();
-      add_bb_to_cluster (c, bb1);
-      add_bb_to_cluster (c, bb2);
-      BB_CLUSTER (bb1) = c;
-      BB_CLUSTER (bb2) = c;
-      c->index = all_clusters.length ();
-      all_clusters.safe_push (c);
-    }
-  else if (BB_CLUSTER (bb1) == NULL || BB_CLUSTER (bb2) == NULL)
-    {
-      merge_bb = BB_CLUSTER (bb1) == NULL ? bb2 : bb1;
-      other_bb = BB_CLUSTER (bb1) == NULL ? bb1 : bb2;
-      merge = BB_CLUSTER (merge_bb);
-      add_bb_to_cluster (merge, other_bb);
-      BB_CLUSTER (other_bb) = merge;
-    }
-  else if (BB_CLUSTER (bb1) != BB_CLUSTER (bb2))
-    {
-      unsigned int i;
-      bitmap_iterator bi;
-
-      old = BB_CLUSTER (bb2);
-      merge = BB_CLUSTER (bb1);
-      merge_clusters (merge, old);
-      EXECUTE_IF_SET_IN_BITMAP (old->bbs, 0, i, bi)
-	BB_CLUSTER (BASIC_BLOCK_FOR_FN (cfun, i)) = merge;
-      all_clusters[old->index] = NULL;
-      update_rep_bb (merge, old->rep_bb);
-      delete_cluster (old);
-    }
-  else
-    gcc_unreachable ();
-}
-
-/* Return true if gimple operands T1 and T2 have the same value.  */
-
-static bool
-gimple_operand_equal_value_p (tree t1, tree t2)
-{
-  if (t1 == t2)
-    return true;
-
-  if (t1 == NULL_TREE
-      || t2 == NULL_TREE)
-    return false;
-
-  if (operand_equal_p (t1, t2, OEP_MATCH_SIDE_EFFECTS))
-    return true;
-
-  return gvn_uses_equal (t1, t2);
-}
-
-/* Return true if gimple statements S1 and S2 are equal.  Gimple_bb (s1) and
-   gimple_bb (s2) are members of SAME_SUCC.  */
-
-static bool
-gimple_equal_p (same_succ *same_succ, gimple *s1, gimple *s2)
-{
-  unsigned int i;
-  tree lhs1, lhs2;
-  basic_block bb1 = gimple_bb (s1), bb2 = gimple_bb (s2);
-  tree t1, t2;
-  bool inv_cond;
-  enum tree_code code1, code2;
-
-  if (gimple_code (s1) != gimple_code (s2))
-    return false;
-
-  switch (gimple_code (s1))
-    {
-    case GIMPLE_CALL:
-      if (!gimple_call_same_target_p (s1, s2))
-	return false;
-
-      t1 = gimple_call_chain (s1);
-      t2 = gimple_call_chain (s2);
-      if (!gimple_operand_equal_value_p (t1, t2))
-	return false;
-
-      if (gimple_call_num_args (s1) != gimple_call_num_args (s2))
-	return false;
-
-      for (i = 0; i < gimple_call_num_args (s1); ++i)
-	{
-	  t1 = gimple_call_arg (s1, i);
-	  t2 = gimple_call_arg (s2, i);
-	  if (!gimple_operand_equal_value_p (t1, t2))
-	    return false;
-	}
-
-      lhs1 = gimple_get_lhs (s1);
-      lhs2 = gimple_get_lhs (s2);
-      if (lhs1 == NULL_TREE && lhs2 == NULL_TREE)
-	return true;
-      if (lhs1 == NULL_TREE || lhs2 == NULL_TREE)
-	return false;
-      if (TREE_CODE (lhs1) == SSA_NAME && TREE_CODE (lhs2) == SSA_NAME)
-	return tail_merge_valueize (lhs1) == tail_merge_valueize (lhs2);
-      return operand_equal_p (lhs1, lhs2, 0);
-
-    case GIMPLE_ASSIGN:
-      lhs1 = gimple_get_lhs (s1);
-      lhs2 = gimple_get_lhs (s2);
-      if (TREE_CODE (lhs1) != SSA_NAME
-	  && TREE_CODE (lhs2) != SSA_NAME)
-	return (operand_equal_p (lhs1, lhs2, 0)
-		&& gimple_operand_equal_value_p (gimple_assign_rhs1 (s1),
-						 gimple_assign_rhs1 (s2)));
-      else if (TREE_CODE (lhs1) == SSA_NAME
-	       && TREE_CODE (lhs2) == SSA_NAME)
-	return operand_equal_p (gimple_assign_rhs1 (s1),
-				gimple_assign_rhs1 (s2), 0);
-      return false;
-
-    case GIMPLE_COND:
-      t1 = gimple_cond_lhs (s1);
-      t2 = gimple_cond_lhs (s2);
-      if (!gimple_operand_equal_value_p (t1, t2))
-	return false;
-
-      t1 = gimple_cond_rhs (s1);
-      t2 = gimple_cond_rhs (s2);
-      if (!gimple_operand_equal_value_p (t1, t2))
-	return false;
-
-      code1 = gimple_cond_code (s1);
-      code2 = gimple_cond_code (s2);
-      inv_cond = (bitmap_bit_p (same_succ->inverse, bb1->index)
-		  != bitmap_bit_p (same_succ->inverse, bb2->index));
-      if (inv_cond)
-	{
-	  bool honor_nans = HONOR_NANS (t1);
-	  code2 = invert_tree_comparison (code2, honor_nans);
-	}
-      return code1 == code2;
-
-    default:
-      return false;
-    }
-}
-
-/* Let GSI skip backwards over local defs.  Return the earliest vuse in VUSE.
-   Return true in VUSE_ESCAPED if the vuse influenced a SSA_OP_DEF of one of the
-   processed statements.  */
-
-static void
-gsi_advance_bw_nondebug_nonlocal (gimple_stmt_iterator *gsi, tree *vuse,
-				  bool *vuse_escaped)
-{
-  gimple *stmt;
-  tree lvuse;
-
-  while (true)
-    {
-      if (gsi_end_p (*gsi))
-	return;
-      stmt = gsi_stmt (*gsi);
-
-      lvuse = gimple_vuse (stmt);
-      if (lvuse != NULL_TREE)
-	{
-	  *vuse = lvuse;
-	  if (!ZERO_SSA_OPERANDS (stmt, SSA_OP_DEF))
-	    *vuse_escaped = true;
-	}
-
-      if (!stmt_local_def (stmt))
-	return;
-      gsi_prev_nondebug (gsi);
-    }
-}
-
-/* Return true if equal (in the sense of gimple_equal_p) statements STMT1 and
-   STMT2 are allowed to be merged.  */
-
-static bool
-merge_stmts_p (gimple *stmt1, gimple *stmt2)
-{
-  /* What could be better than this here is to blacklist the bb
-     containing the stmt, when encountering the stmt f.i. in
-     same_succ_hash.  */
-  if (is_tm_ending (stmt1))
-    return false;
-
-  /* Verify EH landing pads.  */
-  if (lookup_stmt_eh_lp_fn (cfun, stmt1) != lookup_stmt_eh_lp_fn (cfun, stmt2))
-    return false;
-
-  if (is_gimple_call (stmt1)
-      && gimple_call_internal_p (stmt1))
-    switch (gimple_call_internal_fn (stmt1))
-      {
-      case IFN_UBSAN_NULL:
-      case IFN_UBSAN_BOUNDS:
-      case IFN_UBSAN_VPTR:
-      case IFN_UBSAN_CHECK_ADD:
-      case IFN_UBSAN_CHECK_SUB:
-      case IFN_UBSAN_CHECK_MUL:
-      case IFN_UBSAN_OBJECT_SIZE:
-      case IFN_UBSAN_PTR:
-      case IFN_ASAN_CHECK:
-	/* For these internal functions, gimple_location is an implicit
-	   parameter, which will be used explicitly after expansion.
-	   Merging these statements may cause confusing line numbers in
-	   sanitizer messages.  */
-	return gimple_location (stmt1) == gimple_location (stmt2);
-      default:
-	break;
-      }
-
-  return true;
-}
-
-/* Determines whether BB1 and BB2 (members of same_succ) are duplicates.  If so,
-   clusters them.  */
-
-static void
-find_duplicate (same_succ *same_succ, basic_block bb1, basic_block bb2)
-{
-  gimple_stmt_iterator gsi1 = gsi_last_nondebug_bb (bb1);
-  gimple_stmt_iterator gsi2 = gsi_last_nondebug_bb (bb2);
-  tree vuse1 = NULL_TREE, vuse2 = NULL_TREE;
-  bool vuse_escaped = false;
-
-  gsi_advance_bw_nondebug_nonlocal (&gsi1, &vuse1, &vuse_escaped);
-  gsi_advance_bw_nondebug_nonlocal (&gsi2, &vuse2, &vuse_escaped);
-
-  while (!gsi_end_p (gsi1) && !gsi_end_p (gsi2))
-    {
-      gimple *stmt1 = gsi_stmt (gsi1);
-      gimple *stmt2 = gsi_stmt (gsi2);
-
-      if (gimple_code (stmt1) == GIMPLE_LABEL
-	  && gimple_code (stmt2) == GIMPLE_LABEL)
-	break;
-
-      if (!gimple_equal_p (same_succ, stmt1, stmt2))
-	return;
-
-      if (!merge_stmts_p (stmt1, stmt2))
-	return;
-
-      gsi_prev_nondebug (&gsi1);
-      gsi_prev_nondebug (&gsi2);
-      gsi_advance_bw_nondebug_nonlocal (&gsi1, &vuse1, &vuse_escaped);
-      gsi_advance_bw_nondebug_nonlocal (&gsi2, &vuse2, &vuse_escaped);
-    }
-
-  while (!gsi_end_p (gsi1) && gimple_code (gsi_stmt (gsi1)) == GIMPLE_LABEL)
-    {
-      tree label = gimple_label_label (as_a <glabel *> (gsi_stmt (gsi1)));
-      if (DECL_NONLOCAL (label) || FORCED_LABEL (label))
-	return;
-      gsi_prev (&gsi1);
-    }
-  while (!gsi_end_p (gsi2) && gimple_code (gsi_stmt (gsi2)) == GIMPLE_LABEL)
-    {
-      tree label = gimple_label_label (as_a <glabel *> (gsi_stmt (gsi2)));
-      if (DECL_NONLOCAL (label) || FORCED_LABEL (label))
-	return;
-      gsi_prev (&gsi2);
-    }
-  if (!(gsi_end_p (gsi1) && gsi_end_p (gsi2)))
-    return;
-
-  /* If the incoming vuses are not the same, and the vuse escaped into an
-     SSA_OP_DEF, then merging the 2 blocks will change the value of the def,
-     which potentially means the semantics of one of the blocks will be changed.
-     TODO: make this check more precise.  */
-  if (vuse_escaped && vuse1 != vuse2)
-    return;
-
-  if (dump_file)
-    fprintf (dump_file, "find_duplicates: <bb %d> duplicate of <bb %d>\n",
-	     bb1->index, bb2->index);
-
-  set_cluster (bb1, bb2);
-}
-
-/* Returns whether for all phis in DEST the phi alternatives for E1 and
-   E2 are equal.  */
-
-static bool
-same_phi_alternatives_1 (basic_block dest, edge e1, edge e2)
-{
-  int n1 = e1->dest_idx, n2 = e2->dest_idx;
-  gphi_iterator gsi;
-
-  for (gsi = gsi_start_phis (dest); !gsi_end_p (gsi); gsi_next (&gsi))
-    {
-      gphi *phi = gsi.phi ();
-      tree lhs = gimple_phi_result (phi);
-      tree val1 = gimple_phi_arg_def (phi, n1);
-      tree val2 = gimple_phi_arg_def (phi, n2);
-
-      if (virtual_operand_p (lhs))
-	continue;
-
-      if (operand_equal_for_phi_arg_p (val1, val2))
-	continue;
-      if (gvn_uses_equal (val1, val2))
-	continue;
-
-      return false;
-    }
-
-  return true;
-}
-
-/* Returns whether for all successors of BB1 and BB2 (members of SAME_SUCC), the
-   phi alternatives for BB1 and BB2 are equal.  */
-
-static bool
-same_phi_alternatives (same_succ *same_succ, basic_block bb1, basic_block bb2)
-{
-  unsigned int s;
-  bitmap_iterator bs;
-  edge e1, e2;
-  basic_block succ;
-
-  EXECUTE_IF_SET_IN_BITMAP (same_succ->succs, 0, s, bs)
-    {
-      succ = BASIC_BLOCK_FOR_FN (cfun, s);
-      e1 = find_edge (bb1, succ);
-      e2 = find_edge (bb2, succ);
-      if (e1->flags & EDGE_COMPLEX
-	  || e2->flags & EDGE_COMPLEX)
-	return false;
-
-      /* For all phis in bb, the phi alternatives for e1 and e2 need to have
-	 the same value.  */
-      if (!same_phi_alternatives_1 (succ, e1, e2))
-	return false;
-    }
-
-  return true;
-}
-
-/* Return true if BB has non-vop phis.  */
-
-static bool
-bb_has_non_vop_phi (basic_block bb)
-{
-  gimple_seq phis = phi_nodes (bb);
-  gimple *phi;
-
-  if (phis == NULL)
-    return false;
-
-  if (!gimple_seq_singleton_p (phis))
-    return true;
-
-  phi = gimple_seq_first_stmt (phis);
-  return !virtual_operand_p (gimple_phi_result (phi));
-}
-
-/* Returns true if redirecting the incoming edges of FROM to TO maintains the
-   invariant that uses in FROM are dominates by their defs.  */
-
-static bool
-deps_ok_for_redirect_from_bb_to_bb (basic_block from, basic_block to)
-{
-  basic_block cd, dep_bb = BB_DEP_BB (to);
-  edge_iterator ei;
-  edge e;
-
-  if (dep_bb == NULL)
-    return true;
-
-  bitmap from_preds = BITMAP_ALLOC (NULL);
-  FOR_EACH_EDGE (e, ei, from->preds)
-    bitmap_set_bit (from_preds, e->src->index);
-  cd = nearest_common_dominator_for_set (CDI_DOMINATORS, from_preds);
-  BITMAP_FREE (from_preds);
-
-  return dominated_by_p (CDI_DOMINATORS, dep_bb, cd);
-}
-
-/* Returns true if replacing BB1 (or its replacement bb) by BB2 (or its
-   replacement bb) and vice versa maintains the invariant that uses in the
-   replacement are dominates by their defs.  */
-
-static bool
-deps_ok_for_redirect (basic_block bb1, basic_block bb2)
-{
-  if (BB_CLUSTER (bb1) != NULL)
-    bb1 = BB_CLUSTER (bb1)->rep_bb;
-
-  if (BB_CLUSTER (bb2) != NULL)
-    bb2 = BB_CLUSTER (bb2)->rep_bb;
-
-  return (deps_ok_for_redirect_from_bb_to_bb (bb1, bb2)
-	  && deps_ok_for_redirect_from_bb_to_bb (bb2, bb1));
-}
-
-/* Within SAME_SUCC->bbs, find clusters of bbs which can be merged.  */
-
-static void
-find_clusters_1 (same_succ *same_succ)
-{
-  basic_block bb1, bb2;
-  unsigned int i, j;
-  bitmap_iterator bi, bj;
-  int nr_comparisons;
-  int max_comparisons = param_max_tail_merge_comparisons;
-
-  EXECUTE_IF_SET_IN_BITMAP (same_succ->bbs, 0, i, bi)
-    {
-      bb1 = BASIC_BLOCK_FOR_FN (cfun, i);
-
-      /* TODO: handle blocks with phi-nodes.  We'll have to find corresponding
-	 phi-nodes in bb1 and bb2, with the same alternatives for the same
-	 preds.  */
-      if (bb_has_non_vop_phi (bb1) || bb_has_eh_pred (bb1)
-	  || bb_has_abnormal_pred (bb1))
-	continue;
-
-      nr_comparisons = 0;
-      EXECUTE_IF_SET_IN_BITMAP (same_succ->bbs, i + 1, j, bj)
-	{
-	  bb2 = BASIC_BLOCK_FOR_FN (cfun, j);
-
-	  if (bb_has_non_vop_phi (bb2) || bb_has_eh_pred (bb2)
-	      || bb_has_abnormal_pred (bb2))
-	    continue;
-
-	  if (BB_CLUSTER (bb1) != NULL && BB_CLUSTER (bb1) == BB_CLUSTER (bb2))
-	    continue;
-
-	  /* Limit quadratic behavior.  */
-	  nr_comparisons++;
-	  if (nr_comparisons > max_comparisons)
-	    break;
-
-	  /* This is a conservative dependency check.  We could test more
-	     precise for allowed replacement direction.  */
-	  if (!deps_ok_for_redirect (bb1, bb2))
-	    continue;
-
-	  if (!(same_phi_alternatives (same_succ, bb1, bb2)))
-	    continue;
-
-	  find_duplicate (same_succ, bb1, bb2);
-	}
-    }
-}
-
-/* Find clusters of bbs which can be merged.  */
-
-static void
-find_clusters (void)
-{
-  same_succ *same;
-
-  while (!worklist.is_empty ())
-    {
-      same = worklist.pop ();
-      same->in_worklist = false;
-      if (dump_file && (dump_flags & TDF_DETAILS))
-	{
-	  fprintf (dump_file, "processing worklist entry\n");
-	  same_succ_print (dump_file, same);
-	}
-      find_clusters_1 (same);
-    }
-}
-
-/* Returns the vop phi of BB, if any.  */
-
-static gphi *
-vop_phi (basic_block bb)
-{
-  gphi *stmt;
-  gphi_iterator gsi;
-  for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi))
-    {
-      stmt = gsi.phi ();
-      if (! virtual_operand_p (gimple_phi_result (stmt)))
-	continue;
-      return stmt;
-    }
-  return NULL;
-}
-
-/* Redirect all edges from BB1 to BB2, removes BB1 and marks it as removed.  */
-
-static void
-replace_block_by (basic_block bb1, basic_block bb2)
-{
-  edge pred_edge;
-  unsigned int i;
-  gphi *bb2_phi;
-
-  bb2_phi = vop_phi (bb2);
-
-  /* Mark the basic block as deleted.  */
-  mark_basic_block_deleted (bb1);
-
-  /* Redirect the incoming edges of bb1 to bb2.  */
-  for (i = EDGE_COUNT (bb1->preds); i > 0 ; --i)
-    {
-      pred_edge = EDGE_PRED (bb1, i - 1);
-      pred_edge = redirect_edge_and_branch (pred_edge, bb2);
-      gcc_assert (pred_edge != NULL);
-
-      if (bb2_phi == NULL)
-	continue;
-
-      /* The phi might have run out of capacity when the redirect added an
-	 argument, which means it could have been replaced.  Refresh it.  */
-      bb2_phi = vop_phi (bb2);
-
-      add_phi_arg (bb2_phi, SSA_NAME_VAR (gimple_phi_result (bb2_phi)),
-		   pred_edge, UNKNOWN_LOCATION);
-    }
-
-
-  /* Merge the outgoing edge counts from bb1 onto bb2.  */
-  edge e1, e2;
-  edge_iterator ei;
-
-  if (bb2->count.initialized_p ())
-    FOR_EACH_EDGE (e1, ei, bb1->succs)
-      {
-        e2 = find_edge (bb2, e1->dest);
-        gcc_assert (e2);
-
-	/* If probabilities are same, we are done.
-	   If counts are nonzero we can distribute accordingly. In remaining
-	   cases just avreage the values and hope for the best.  */
-	e2->probability = e1->probability.combine_with_count
-	                     (bb1->count, e2->probability, bb2->count);
-      }
-  bb2->count += bb1->count;
-
-  /* Move over any user labels from bb1 after the bb2 labels.  */
-  gimple_stmt_iterator gsi1 = gsi_start_bb (bb1);
-  if (!gsi_end_p (gsi1) && gimple_code (gsi_stmt (gsi1)) == GIMPLE_LABEL)
-    {
-      gimple_stmt_iterator gsi2 = gsi_after_labels (bb2);
-      while (!gsi_end_p (gsi1)
-	     && gimple_code (gsi_stmt (gsi1)) == GIMPLE_LABEL)
-	{
-	  tree label = gimple_label_label (as_a <glabel *> (gsi_stmt (gsi1)));
-	  gcc_assert (!DECL_NONLOCAL (label) && !FORCED_LABEL (label));
-	  if (DECL_ARTIFICIAL (label))
-	    gsi_next (&gsi1);
-	  else
-	    gsi_move_before (&gsi1, &gsi2);
-	}
-    }
-
-  /* Clear range info from all stmts in BB2 -- this transformation
-     could make them out of date.  */
-  reset_flow_sensitive_info_in_bb (bb2);
-
-  /* Do updates that use bb1, before deleting bb1.  */
-  release_last_vdef (bb1);
-  same_succ_flush_bb (bb1);
-
-  delete_basic_block (bb1);
-}
-
-/* Bbs for which update_debug_stmt need to be called.  */
-
-static bitmap update_bbs;
-
-/* For each cluster in all_clusters, merge all cluster->bbs.  Returns
-   number of bbs removed.  */
-
-static int
-apply_clusters (void)
-{
-  basic_block bb1, bb2;
-  bb_cluster *c;
-  unsigned int i, j;
-  bitmap_iterator bj;
-  int nr_bbs_removed = 0;
-
-  for (i = 0; i < all_clusters.length (); ++i)
-    {
-      c = all_clusters[i];
-      if (c == NULL)
-	continue;
-
-      bb2 = c->rep_bb;
-      bitmap_set_bit (update_bbs, bb2->index);
-
-      bitmap_clear_bit (c->bbs, bb2->index);
-      EXECUTE_IF_SET_IN_BITMAP (c->bbs, 0, j, bj)
-	{
-	  bb1 = BASIC_BLOCK_FOR_FN (cfun, j);
-	  bitmap_clear_bit (update_bbs, bb1->index);
-
-	  replace_block_by (bb1, bb2);
-	  nr_bbs_removed++;
-	}
-    }
-
-  return nr_bbs_removed;
-}
-
-/* Resets debug statement STMT if it has uses that are not dominated by their
-   defs.  */
-
-static void
-update_debug_stmt (gimple *stmt)
-{
-  use_operand_p use_p;
-  ssa_op_iter oi;
-  basic_block bbuse;
-
-  if (!gimple_debug_bind_p (stmt))
-    return;
-
-  bbuse = gimple_bb (stmt);
-  FOR_EACH_PHI_OR_STMT_USE (use_p, stmt, oi, SSA_OP_USE)
-    {
-      tree name = USE_FROM_PTR (use_p);
-      gimple *def_stmt = SSA_NAME_DEF_STMT (name);
-      basic_block bbdef = gimple_bb (def_stmt);
-      if (bbdef == NULL || bbuse == bbdef
-	  || dominated_by_p (CDI_DOMINATORS, bbuse, bbdef))
-	continue;
-
-      gimple_debug_bind_reset_value (stmt);
-      update_stmt (stmt);
-      break;
-    }
-}
-
-/* Resets all debug statements that have uses that are not
-   dominated by their defs.  */
-
-static void
-update_debug_stmts (void)
-{
-  basic_block bb;
-  bitmap_iterator bi;
-  unsigned int i;
-
-  EXECUTE_IF_SET_IN_BITMAP (update_bbs, 0, i, bi)
-    {
-      gimple *stmt;
-      gimple_stmt_iterator gsi;
-
-      bb = BASIC_BLOCK_FOR_FN (cfun, i);
-      for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
-	{
-	  stmt = gsi_stmt (gsi);
-	  if (!is_gimple_debug (stmt))
-	    continue;
-	  update_debug_stmt (stmt);
-	}
-    }
-}
-
-/* Runs tail merge optimization.  */
-
-unsigned int
-tail_merge_optimize (bool need_crit_edge_split)
-{
-  int nr_bbs_removed_total = 0;
-  int nr_bbs_removed;
-  bool loop_entered = false;
-  int iteration_nr = 0;
-  int max_iterations = param_max_tail_merge_iterations;
-
-  if (!flag_tree_tail_merge
-      || max_iterations == 0)
-    return 0;
-
-  timevar_push (TV_TREE_TAIL_MERGE);
-
-  /* Re-split critical edges when PRE did a CFG cleanup.  */
-  if (need_crit_edge_split)
-    split_edges_for_insertion ();
-
-  if (!dom_info_available_p (CDI_DOMINATORS))
-    {
-      /* PRE can leave us with unreachable blocks, remove them now.  */
-      delete_unreachable_blocks ();
-      calculate_dominance_info (CDI_DOMINATORS);
-    }
-  init_worklist ();
-
-  while (!worklist.is_empty ())
-    {
-      if (!loop_entered)
-	{
-	  loop_entered = true;
-	  alloc_cluster_vectors ();
-	  update_bbs = BITMAP_ALLOC (NULL);
-	}
-      else
-	reset_cluster_vectors ();
-
-      iteration_nr++;
-      if (dump_file && (dump_flags & TDF_DETAILS))
-	fprintf (dump_file, "worklist iteration #%d\n", iteration_nr);
-
-      find_clusters ();
-      gcc_assert (worklist.is_empty ());
-      if (all_clusters.is_empty ())
-	break;
-
-      nr_bbs_removed = apply_clusters ();
-      nr_bbs_removed_total += nr_bbs_removed;
-      if (nr_bbs_removed == 0)
-	break;
-
-      free_dominance_info (CDI_DOMINATORS);
-
-      if (iteration_nr == max_iterations)
-	break;
-
-      calculate_dominance_info (CDI_DOMINATORS);
-      update_worklist ();
-    }
-
-  if (dump_file && (dump_flags & TDF_DETAILS))
-    fprintf (dump_file, "htab collision / search: %f\n",
-	     same_succ_htab->collisions ());
-
-  if (nr_bbs_removed_total > 0)
-    {
-      if (MAY_HAVE_DEBUG_BIND_STMTS)
-	{
-	  calculate_dominance_info (CDI_DOMINATORS);
-	  update_debug_stmts ();
-	}
-
-      if (dump_file && (dump_flags & TDF_DETAILS))
-	{
-	  fprintf (dump_file, "Before TODOs.\n");
-	  dump_function_to_file (current_function_decl, dump_file, dump_flags);
-	}
-
-      mark_virtual_operands_for_renaming (cfun);
-    }
-
-  delete_worklist ();
-  if (loop_entered)
-    {
-      delete_cluster_vectors ();
-      BITMAP_FREE (update_bbs);
-    }
-
-  timevar_pop (TV_TREE_TAIL_MERGE);
-
-  return 0;
-}
author	Martin Liska <mliska@suse.cz>	2022-01-14 16:56:44 +0100
committer	Martin Liska <mliska@suse.cz>	2022-01-17 22:12:04 +0100
commit	5c69acb32329d49e58c26fa41ae74229a52b9106 (patch)
tree	ddb05f9d73afb6f998457d2ac4b720e3b3b60483 /gcc/tree-ssa-tail-merge.c
parent	490e23032baaece71f2ec09fa1805064b150fbc2 (diff)
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