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2023-11-03GCN: Address undeclared 'NULL' usage in ↵Thomas Schwinge1-1/+1
'libgcc/config/gcn/gthr-gcn.h:__gthread_getspecific' For 'libgcc/config/gcn/gthr-gcn.h' used in libstdc++ context (WIP), we have: [...]/build-gcc-offload-amdgcn-amdhsa/amdgcn-amdhsa/libstdc++-v3/include/amdgcn-amdhsa/bits/gthr-default.h: In function ‘void* __gthread_getspecific(__gthread_key_t)’: [...]/build-gcc-offload-amdgcn-amdhsa/amdgcn-amdhsa/libstdc++-v3/include/amdgcn-amdhsa/bits/gthr-default.h:90:10: error: ‘NULL’ was not declared in this scope 90 | return NULL; | ^~~~ Resolve this with 's%NULL%0', as is used in 'libgcc/gthr-single.h:__gthread_getspecific', for example. Follow-up to commit 76d463310787c8c7fd0c55cf88031b240311ab68 "Create GCN-specific gthreads". libgcc/ * config/gcn/gthr-gcn.h (__gthread_getspecific): 's%NULL%0'.
2023-11-01Daily bump.GCC Administrator1-0/+4
2023-10-31hardcfr: support checking at abnormal edges [PR111943]Alexandre Oliva1-1/+1
Control flow redundancy may choose abnormal edges for early checking, but that breaks because we can't insert checks on such edges. Introduce conditional checking on the dest block of abnormal edges, and leave it for the optimizer to drop the conditional. for gcc/ChangeLog PR tree-optimization/111943 * gimple-harden-control-flow.cc: Adjust copyright year. (rt_bb_visited): Add vfalse and vtrue data members. Zero-initialize them in the ctor. (rt_bb_visited::insert_exit_check_on_edge): Upon encountering abnormal edges, insert initializers for vfalse and vtrue on entry, and insert the check sequence guarded by a conditional in the dest block. for libgcc/ChangeLog * hardcfr.c: Adjust copyright year. for gcc/testsuite/ChangeLog PR tree-optimization/111943 * gcc.dg/harden-cfr-pr111943.c: New.
2023-10-25Daily bump.GCC Administrator1-0/+6
2023-10-24libgcc: make heap-based trampolines conditional on libc presenceSergei Trofimovich2-0/+10
To build `libc` for a target one needs to build `gcc` without `libc` support first. Commit r14-4823-g8abddb187b3348 "libgcc: support heap-based trampolines" added unconditional `libc` dependency and broke libc-less `gcc` builds. An example failure on `x86_64-unknown-linux-gnu`: $ mkdir -p /tmp/empty $ ../gcc/configure \ --disable-multilib \ --without-headers \ --with-newlib \ --enable-languages=c \ --disable-bootstrap \ --disable-gcov \ --disable-threads \ --disable-shared \ --disable-libssp \ --disable-libquadmath \ --disable-libgomp \ --disable-libatomic \ --with-build-sysroot=/tmp/empty $ make ... /tmp/gb/./gcc/xgcc -B/tmp/gb/./gcc/ -B/usr/local/x86_64-pc-linux-gnu/bin/ -B/usr/local/x86_64-pc-linux-gnu/lib/ -isystem /usr/local/x86_64-pc-linux-gnu/include -isystem /usr/local/x86_64-pc-linux-gnu/sys-include --sysroot=/tmp/empty -g -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fpic -mlong-double-80 -DUSE_ELF_SYMVER -fcf-protection -mshstk -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -fpic -mlong-double-80 -DUSE_ELF_SYMVER -fcf-protection -mshstk -I. -I. -I../.././gcc -I/home/slyfox/dev/git/gcc/libgcc -I/home/slyfox/dev/git/gcc/libgcc/. -I/home/slyfox/dev/git/gcc/libgcc/../gcc -I/home/slyfox/dev/git/gcc/libgcc/../include -DHAVE_CC_TLS -DUSE_TLS -o heap-trampoline.o -MT heap-trampoline.o -MD -MP -MF heap-trampoline.dep -c .../gcc/libgcc/config/i386/heap-trampoline.c -fvisibility=hidden -DHIDE_EXPORTS ../gcc/libgcc/config/i386/heap-trampoline.c:3:10: fatal error: unistd.h: No such file or directory 3 | #include <unistd.h> | ^~~~~~~~~~ compilation terminated. make[2]: *** [.../gcc/libgcc/static-object.mk:17: heap-trampoline.o] Error 1 make[2]: Leaving directory '/tmp/gb/x86_64-pc-linux-gnu/libgcc' make[1]: *** [Makefile:13307: all-target-libgcc] Error 2 The change inhibits any heap-based trampoline code. libgcc/ * config/aarch64/heap-trampoline.c: Disable when libc is not present. * config/i386/heap-trampoline.c: Ditto.
2023-10-23Daily bump.GCC Administrator1-0/+26
2023-10-22Config,Darwin: Allow for configuring Darwin to use embedded runpath.Iain Sandoe3-13/+40
Recent Darwin versions place contraints on the use of run paths specified in environment variables. This breaks some assumptions in the GCC build. This change allows the user to configure a Darwin build to use '@rpath/libraryname.dylib' in library names and then to add an embedded runpath to executables (and libraries with dependents). The embedded runpath is added by default unless the user adds '-nodefaultrpaths' to the link line. For an installed compiler, it means that any executable built with that compiler will reference the runtimes installed with the compiler (equivalent to hard-coding the library path into the name of the library). During build-time configurations any "-B" entries will be added to the runpath thus the newly-built libraries will be found by exes. Since the install name is set in libtool, that decision needs to be available here (but might also cause dependent ones in Makefiles, so we need to export a conditional). This facility is not available for Darwin 8 or earlier, however the existing environment variable runpath does work there. We default this on for systems where the external DYLD_LIBRARY_PATH does not work and off for Darwin 8 or earlier. For systems that can use either method, if the value is unset, we use the default (which is currently DYLD_LIBRARY_PATH). ChangeLog: * configure: Regenerate. * configure.ac: Do not add default runpaths to GCC exes when we are building -static-libstdc++/-static-libgcc (the default). * libtool.m4: Add 'enable-darwin-at-runpath'. Act on the enable flag to alter Darwin libraries to use @rpath names. gcc/ChangeLog: * aclocal.m4: Regenerate. * configure: Regenerate. * configure.ac: Handle Darwin rpaths. * config/darwin.h: Handle Darwin rpaths. * config/darwin.opt: Handle Darwin rpaths. * Makefile.in: Handle Darwin rpaths. gcc/ada/ChangeLog: * gcc-interface/Makefile.in: Handle Darwin rpaths. gcc/jit/ChangeLog: * Make-lang.in: Handle Darwin rpaths. libatomic/ChangeLog: * Makefile.am: Handle Darwin rpaths. * Makefile.in: Regenerate. * configure: Regenerate. * configure.ac: Handle Darwin rpaths. libbacktrace/ChangeLog: * configure: Regenerate. * configure.ac: Handle Darwin rpaths. libcc1/ChangeLog: * configure: Regenerate. libffi/ChangeLog: * Makefile.am: Handle Darwin rpaths. * Makefile.in: Regenerate. * configure: Regenerate. libgcc/ChangeLog: * config/t-slibgcc-darwin: Generate libgcc_s with an @rpath name. * config.host: Handle Darwin rpaths. libgfortran/ChangeLog: * Makefile.am: Handle Darwin rpaths. * Makefile.in: Regenerate. * configure: Regenerate. * configure.ac: Handle Darwin rpaths libgm2/ChangeLog: * Makefile.am: Handle Darwin rpaths. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * configure.ac: Handle Darwin rpaths. * libm2cor/Makefile.am: Handle Darwin rpaths. * libm2cor/Makefile.in: Regenerate. * libm2iso/Makefile.am: Handle Darwin rpaths. * libm2iso/Makefile.in: Regenerate. * libm2log/Makefile.am: Handle Darwin rpaths. * libm2log/Makefile.in: Regenerate. * libm2min/Makefile.am: Handle Darwin rpaths. * libm2min/Makefile.in: Regenerate. * libm2pim/Makefile.am: Handle Darwin rpaths. * libm2pim/Makefile.in: Regenerate. libgomp/ChangeLog: * Makefile.am: Handle Darwin rpaths. * Makefile.in: Regenerate. * configure: Regenerate. * configure.ac: Handle Darwin rpaths libitm/ChangeLog: * Makefile.am: Handle Darwin rpaths. * Makefile.in: Regenerate. * configure: Regenerate. * configure.ac: Handle Darwin rpaths. libobjc/ChangeLog: * configure: Regenerate. * configure.ac: Handle Darwin rpaths. libphobos/ChangeLog: * configure: Regenerate. * configure.ac: Handle Darwin rpaths. * libdruntime/Makefile.am: Handle Darwin rpaths. * libdruntime/Makefile.in: Regenerate. * src/Makefile.am: Handle Darwin rpaths. * src/Makefile.in: Regenerate. libquadmath/ChangeLog: * Makefile.am: Handle Darwin rpaths. * Makefile.in: Regenerate. * configure: Regenerate. * configure.ac: Handle Darwin rpaths. libsanitizer/ChangeLog: * asan/Makefile.am: Handle Darwin rpaths. * asan/Makefile.in: Regenerate. * configure: Regenerate. * hwasan/Makefile.am: Handle Darwin rpaths. * hwasan/Makefile.in: Regenerate. * lsan/Makefile.am: Handle Darwin rpaths. * lsan/Makefile.in: Regenerate. * tsan/Makefile.am: Handle Darwin rpaths. * tsan/Makefile.in: Regenerate. * ubsan/Makefile.am: Handle Darwin rpaths. * ubsan/Makefile.in: Regenerate. libssp/ChangeLog: * Makefile.am: Handle Darwin rpaths. * Makefile.in: Regenerate. * configure: Regenerate. * configure.ac: Handle Darwin rpaths. libstdc++-v3/ChangeLog: * configure: Regenerate. * configure.ac: Handle Darwin rpaths. * src/Makefile.am: Handle Darwin rpaths. * src/Makefile.in: Regenerate. libvtv/ChangeLog: * configure: Regenerate. * configure.ac: Handle Darwin rpaths. lto-plugin/ChangeLog: * configure: Regenerate. * configure.ac: Handle Darwin rpaths. zlib/ChangeLog: * configure: Regenerate. * configure.ac: Handle Darwin rpaths.
2023-10-22libgcc: support heap-based trampolinesAndrew Burgess7-0/+391
Add support for heap-based trampolines on x86_64-linux, aarch64-linux, and x86_64-darwin. Implement the __builtin_nested_func_ptr_created and __builtin_nested_func_ptr_deleted functions for these targets. Co-Authored-By: Maxim Blinov <maxim.blinov@embecosm.com> Co-Authored-By: Iain Sandoe <iain@sandoe.co.uk> Co-Authored-By: Francois-Xavier Coudert <fxcoudert@gcc.gnu.org> libgcc/ChangeLog: * libgcc2.h (__builtin_nested_func_ptr_created): Declare. (__builtin_nested_func_ptr_deleted): Declare. * libgcc-std.ver.in: Add the new symbols. * config/aarch64/heap-trampoline.c: Implement heap-based trampolines for aarch64. * config/aarch64/t-heap-trampoline: Add rule to build config/aarch64/heap-trampoline.c * config/i386/heap-trampoline.c: Implement heap-based trampolines for x86_64. * config/i386/t-heap-trampoline: Add rule to build config/i386/heap-trampoline.cc * config.host: Handle --enable-heap-trampolines on x86_64-*-linux*, aarch64-*-linux*, x86_64-*-darwin*.
2023-10-21Daily bump.GCC Administrator1-0/+9
2023-10-20amdgcn: add -march=gfx1030 EXPERIMENTALAndrew Stubbs1-1/+2
Accept the architecture configure option and resolve build failures. This is enough to build binaries, but I've not got a device to test it on, so there are probably runtime issues to fix. The cache control instructions might be unsafe (or too conservative), and the kernel metadata might be off. Vector reductions will need to be reworked for RDNA2. In principle, it would be better to use wavefrontsize32 for this architecture, but that would mean switching everything to allow SImode masks, so wavefrontsize64 it is. The multilib is not included in the default configuration so either configure --with-arch=gfx1030 or include it in --with-multilib-list=gfx1030,.... The majority of this patch has no effect on other devices, but changing from using scalar writes for the exit value to vector writes means we don't need the scalar cache write-back instruction anywhere (which doesn't exist in RDNA2). gcc/ChangeLog: * config.gcc: Allow --with-arch=gfx1030. * config/gcn/gcn-hsa.h (NO_XNACK): gfx1030 does not support xnack. (ASM_SPEC): gfx1030 needs -mattr=+wavefrontsize64 set. * config/gcn/gcn-opts.h (enum processor_type): Add PROCESSOR_GFX1030. (TARGET_GFX1030): New. (TARGET_RDNA2): New. * config/gcn/gcn-valu.md (@dpp_move<mode>): Disable for RDNA2. (addc<mode>3<exec_vcc>): Add RDNA2 syntax variant. (subc<mode>3<exec_vcc>): Likewise. (<convop><mode><vndi>2_exec): Add RDNA2 alternatives. (vec_cmp<mode>di): Likewise. (vec_cmp<u><mode>di): Likewise. (vec_cmp<mode>di_exec): Likewise. (vec_cmp<u><mode>di_exec): Likewise. (vec_cmp<mode>di_dup): Likewise. (vec_cmp<mode>di_dup_exec): Likewise. (reduc_<reduc_op>_scal_<mode>): Disable for RDNA2. (*<reduc_op>_dpp_shr_<mode>): Likewise. (*plus_carry_dpp_shr_<mode>): Likewise. (*plus_carry_in_dpp_shr_<mode>): Likewise. * config/gcn/gcn.cc (gcn_option_override): Recognise gfx1030. (gcn_global_address_p): RDNA2 only allows smaller offsets. (gcn_addr_space_legitimate_address_p): Likewise. (gcn_omp_device_kind_arch_isa): Recognise gfx1030. (gcn_expand_epilogue): Use VGPRs instead of SGPRs. (output_file_start): Configure gfx1030. * config/gcn/gcn.h (TARGET_CPU_CPP_BUILTINS): Add __RDNA2__; (ASSEMBLER_DIALECT): New. * config/gcn/gcn.md (rdna): New define_attr. (enabled): Use "rdna" attribute. (gcn_return): Remove s_dcache_wb. (addcsi3_scalar): Add RDNA2 syntax variant. (addcsi3_scalar_zero): Likewise. (addptrdi3): Likewise. (mulsi3): v_mul_lo_i32 should be v_mul_lo_u32 on all ISA. (*memory_barrier): Add RDNA2 syntax variant. (atomic_load<mode>): Add RDNA2 cache control variants, and disable scalar atomics for RDNA2. (atomic_store<mode>): Likewise. (atomic_exchange<mode>): Likewise. * config/gcn/gcn.opt (gpu_type): Add gfx1030. * config/gcn/mkoffload.cc (EF_AMDGPU_MACH_AMDGCN_GFX1030): New. (main): Recognise -march=gfx1030. * config/gcn/t-omp-device: Add gfx1030 isa. libgcc/ChangeLog: * config/gcn/amdgcn_veclib.h (CDNA3_PLUS): Set false for __RDNA2__. libgomp/ChangeLog: * plugin/plugin-gcn.c (EF_AMDGPU_MACH_AMDGCN_GFX1030): New. (isa_hsa_name): Recognise gfx1030. (isa_code): Likewise. * team.c (defined): Remove s_endpgm.
2023-10-20Control flow redundancy hardeningAlexandre Oliva2-0/+303
This patch introduces an optional hardening pass to catch unexpected execution flows. Functions are transformed so that basic blocks set a bit in an automatic array, and (non-exceptional) function exit edges check that the bits in the array represent an expected execution path in the CFG. Functions with multiple exit edges, or with too many blocks, call an out-of-line checker builtin implemented in libgcc. For simpler functions, the verification is performed in-line. -fharden-control-flow-redundancy enables the pass for eligible functions, --param hardcfr-max-blocks sets a block count limit for functions to be eligible, and --param hardcfr-max-inline-blocks tunes the "too many blocks" limit for in-line verification. -fhardcfr-skip-leaf makes leaf functions non-eligible. Additional -fhardcfr-check-* options are added to enable checking at exception escape points, before potential sibcalls, hereby dubbed returning calls, and before noreturn calls and exception raises. A notable case is the distinction between noreturn calls expected to throw and those expected to terminate or loop forever: the default setting for -fhardcfr-check-noreturn-calls, no-xthrow, performs checking before the latter, but the former only gets checking in the exception handler. GCC can only tell between them by explicit marking noreturn functions expected to raise with the newly-introduced expected_throw attribute, and corresponding ECF_XTHROW flag. for gcc/ChangeLog * tree-core.h (ECF_XTHROW): New macro. * tree.cc (set_call_expr): Add expected_throw attribute when ECF_XTHROW is set. (build_common_builtin_node): Add ECF_XTHROW to __cxa_end_cleanup and _Unwind_Resume or _Unwind_SjLj_Resume. * calls.cc (flags_from_decl_or_type): Check for expected_throw attribute to set ECF_XTHROW. * gimple.cc (gimple_build_call_from_tree): Propagate ECF_XTHROW from decl flags to gimple call... (gimple_call_flags): ... and back. * gimple.h (GF_CALL_XTHROW): New gf_mask flag. (gimple_call_set_expected_throw): New. (gimple_call_expected_throw_p): New. * Makefile.in (OBJS): Add gimple-harden-control-flow.o. * builtins.def (BUILT_IN___HARDCFR_CHECK): New. * common.opt (fharden-control-flow-redundancy): New. (-fhardcfr-check-returning-calls): New. (-fhardcfr-check-exceptions): New. (-fhardcfr-check-noreturn-calls=*): New. (Enum hardcfr_check_noreturn_calls): New. (fhardcfr-skip-leaf): New. * doc/invoke.texi: Document them. (hardcfr-max-blocks, hardcfr-max-inline-blocks): New params. * flag-types.h (enum hardcfr_noret): New. * gimple-harden-control-flow.cc: New. * params.opt (-param=hardcfr-max-blocks=): New. (-param=hradcfr-max-inline-blocks=): New. * passes.def (pass_harden_control_flow_redundancy): Add. * tree-pass.h (make_pass_harden_control_flow_redundancy): Declare. * doc/extend.texi: Document expected_throw attribute. for gcc/ada/ChangeLog * gcc-interface/trans.cc (gigi): Mark __gnat_reraise_zcx with ECF_XTHROW. (build_raise_check): Likewise for all rcheck subprograms. for gcc/c-family/ChangeLog * c-attribs.cc (handle_expected_throw_attribute): New. (c_common_attribute_table): Add expected_throw. for gcc/cp/ChangeLog * decl.cc (push_throw_library_fn): Mark with ECF_XTHROW. * except.cc (build_throw): Likewise __cxa_throw, _ITM_cxa_throw, __cxa_rethrow. for gcc/testsuite/ChangeLog * c-c++-common/torture/harden-cfr.c: New. * c-c++-common/harden-cfr-noret-never-O0.c: New. * c-c++-common/torture/harden-cfr-noret-never.c: New. * c-c++-common/torture/harden-cfr-noret-noexcept.c: New. * c-c++-common/torture/harden-cfr-noret-nothrow.c: New. * c-c++-common/torture/harden-cfr-noret.c: New. * c-c++-common/torture/harden-cfr-notail.c: New. * c-c++-common/torture/harden-cfr-returning.c: New. * c-c++-common/torture/harden-cfr-tail.c: New. * c-c++-common/torture/harden-cfr-abrt-always.c: New. * c-c++-common/torture/harden-cfr-abrt-never.c: New. * c-c++-common/torture/harden-cfr-abrt-no-xthrow.c: New. * c-c++-common/torture/harden-cfr-abrt-nothrow.c: New. * c-c++-common/torture/harden-cfr-abrt.c: New. * c-c++-common/torture/harden-cfr-always.c: New. * c-c++-common/torture/harden-cfr-never.c: New. * c-c++-common/torture/harden-cfr-no-xthrow.c: New. * c-c++-common/torture/harden-cfr-nothrow.c: New. * c-c++-common/torture/harden-cfr-bret-always.c: New. * c-c++-common/torture/harden-cfr-bret-never.c: New. * c-c++-common/torture/harden-cfr-bret-noopt.c: New. * c-c++-common/torture/harden-cfr-bret-noret.c: New. * c-c++-common/torture/harden-cfr-bret-no-xthrow.c: New. * c-c++-common/torture/harden-cfr-bret-nothrow.c: New. * c-c++-common/torture/harden-cfr-bret-retcl.c: New. * c-c++-common/torture/harden-cfr-bret.c: New. * g++.dg/harden-cfr-throw-always-O0.C: New. * g++.dg/harden-cfr-throw-returning-O0.C: New. * g++.dg/torture/harden-cfr-noret-always-no-nothrow.C: New. * g++.dg/torture/harden-cfr-noret-never-no-nothrow.C: New. * g++.dg/torture/harden-cfr-noret-no-nothrow.C: New. * g++.dg/torture/harden-cfr-throw-always.C: New. * g++.dg/torture/harden-cfr-throw-never.C: New. * g++.dg/torture/harden-cfr-throw-no-xthrow.C: New. * g++.dg/torture/harden-cfr-throw-no-xthrow-expected.C: New. * g++.dg/torture/harden-cfr-throw-nothrow.C: New. * g++.dg/torture/harden-cfr-throw-nocleanup.C: New. * g++.dg/torture/harden-cfr-throw-returning.C: New. * g++.dg/torture/harden-cfr-throw.C: New. * gcc.dg/torture/harden-cfr-noret-no-nothrow.c: New. * gcc.dg/torture/harden-cfr-tail-ub.c: New. * gnat.dg/hardcfr.adb: New. for libgcc/ChangeLog * Makefile.in (LIB2ADD): Add hardcfr.c. * hardcfr.c: New.
2023-10-19Daily bump.GCC Administrator1-0/+6
2023-10-18LibF7: Implement mul_mant for devices without MUL instruction.Georg-Johann Lay3-4/+98
libgcc/config/avr/libf7/ * libf7-asm.sx (mul_mant): Implement for devices without MUL. * asm-defs.h (wmov) [!HAVE_MUL]: Fix regno computation. * t-libf7 (F7_ASM_FLAGS): Add -g0.
2023-10-18Daily bump.GCC Administrator1-0/+13
2023-10-17LibF7: Re-generate f7-renames.h to pick up white-space from f7renames.sh.Georg-Johann Lay1-4/+4
libgcc/config/avr/libf7/ * f7-renames.h: Re-renerate.
2023-10-17LibF7: Implement fma / fmal.Georg-Johann Lay3-10/+62
libgcc/config/avr/libf7/ * libf7.h (F7_SIZEOF): New macro. * libf7-asm.sx: Use F7_SIZEOF instead of magic number "10". (F7MOD_D_fma_, __fma): New module and function. (fma) [-mdouble=64]: Define as alias for __fma. (fmal) [-mlong-double=64]: Define as alias for __fma. * libf7-common.mk (F7_ASM_PARTS): Add D_fma.
2023-10-14Daily bump.GCC Administrator1-0/+24
2023-10-13or1k: Fix -Wincompatible-pointer-types warning during libgcc buildFlorian Weimer1-1/+1
libgcc/ * config/or1k/linux-unwind.h (or1k_fallback_frame_state): Add missing cast.
2023-10-13arc: Fix -Wincompatible-pointer-types warning during libgcc buildFlorian Weimer1-1/+1
libgcc/ * config/arc/linux-unwind.h (arc_fallback_frame_state): Add missing cast.
2023-10-13riscv: Fix -Wincompatible-pointer-types warning during libgcc buildFlorian Weimer1-1/+1
libgcc/ * config/riscv/linux-unwind.h (riscv_fallback_frame_state): Add missing cast.
2023-10-13csky: Fix -Wincompatible-pointer-types warning during libgcc buildFlorian Weimer1-1/+1
libgcc/ * config/csky/linux-unwind.h (csky_fallback_frame_state): Add missing cast.
2023-10-13m68k: Avoid implicit function declaration in libgccFlorian Weimer1-0/+1
libgcc/ * config/m68k/fpgnulib.c (__cmpdf2): Declare.
2023-10-13Daily bump.GCC Administrator1-0/+6
2023-10-12LibF7: Implement atan2.Georg-Johann Lay3-3/+61
libgcc/config/avr/libf7/ * libf7.c (F7MOD_atan2_, f7_atan2): New module and function. * libf7.h: Adjust comments. * libf7-common.mk (CALL_PROLOGUES): Add atan2.
2023-10-06Daily bump.GCC Administrator1-0/+13
2023-10-05LibF7: Remove uses of attribute pure.Georg-Johann Lay2-27/+26
libgcc/config/avr/libf7/ * libf7.h (F7_PURE): Remove all occurrences. * libf7.c: Same.
2023-10-05LibF7: Use monic denominator polynomials to save a multiplication.Georg-Johann Lay3-18/+25
libgcc/config/avr/libf7/ * libf7.h (F7_FLAGNO_plusx, F7_FLAG_plusx): New macros. * libf7.c (f7_horner): Handle F7_FLAG_plusx in highest coefficient. * libf7-const.def [F7MOD_atan_]: Denominator: Set F7_FLAG_plusx and omit highest term. [F7MOD_asinacos_]: Use rational function with normalized denominator.
2023-09-28Daily bump.GCC Administrator1-0/+4
2023-09-26AArch64: Remove BTI from outline atomicsWilco Dijkstra1-3/+3
The outline atomic functions have hidden visibility and can only be called directly. Therefore we can remove the BTI at function entry. This improves security by reducing the number of indirect entry points in a binary. The BTI markings on the objects are still emitted. libgcc/ChangeLog: * config/aarch64/lse.S (BTI_C): Remove define.
2023-09-21Daily bump.GCC Administrator1-0/+5
2023-09-20aarch64: Ensure const and sign correctnessPekka Seppänen1-2/+3
Be const and sign correct by using a matching CIE augmentation type. Use a builtin instead of relying <string.h> being included. libgcc/ChangeLog: * config/aarch64/aarch64-unwind.h (aarch64_cie_signed_with_b_key): Use const unsigned type and a builtin. Signed-off-by: Pekka Seppänen <pexu@gcc.mail.kapsi.fi>
2023-09-07Daily bump.GCC Administrator1-0/+66
2023-09-06libgcc _BitInt helper documentation [PR102989]Jakub Jelinek2-0/+28
On Mon, Aug 21, 2023 at 05:32:04PM +0000, Joseph Myers wrote: > I think the libgcc functions (i.e. those exported by libgcc, to which > references are generated by the compiler) need documenting in libgcc.texi. > Internal functions or macros in the libgcc patch need appropriate comments > specifying their semantics; especially FP_TO_BITINT and FP_FROM_BITINT > which have a lot of arguments and no comments saying what the semantics of > the macros and their arguments are supposed to me. Here is an incremental patch which does that. 2023-09-06 Jakub Jelinek <jakub@redhat.com> PR c/102989 gcc/ * doc/libgcc.texi (Bit-precise integer arithmetic functions): Document general rules for _BitInt support library functions and document __mulbitint3 and __divmodbitint4. (Conversion functions): Document __fix{s,d,x,t}fbitint, __floatbitint{s,d,x,t,h,b}f, __bid_fix{s,d,t}dbitint and __bid_floatbitint{s,d,t}d. libgcc/ * libgcc2.c (bitint_negate): Add function comment. * soft-fp/bitint.h (bitint_negate): Add function comment. (FP_TO_BITINT, FP_FROM_BITINT): Add comment explaining the macros.
2023-09-06libgcc _BitInt support [PR102989]Jakub Jelinek33-13/+3339
This patch adds the library helpers for multiplication, division + modulo and casts from and to floating point (both binary and decimal). As described in the intro, the first step is try to reduce further the passed in precision by skipping over most significant limbs with just zeros or sign bit copies. For multiplication and division I've implemented a simple algorithm, using something smarter like Karatsuba or Toom N-Way might be faster for very large _BitInts (which we don't support right now anyway), but could mean more code in libgcc, which maybe isn't what people are willing to accept. For the to/from floating point conversions the patch uses soft-fp, because it already has tons of handy macros which can be used for that. In theory it could be implemented using {,unsigned} long long or {,unsigned} __int128 to/from floating point conversions with some frexp before/after, but at that point we already need to force it into integer registers and analyze it anyway. Plus, for 32-bit arches there is no __int128 that could be used for XF/TF mode stuff. I know that soft-fp is owned by glibc and I think the op-common.h change should be propagated there, but the bitint stuff is really GCC specific and IMHO doesn't belong into the glibc copy. 2023-09-06 Jakub Jelinek <jakub@redhat.com> PR c/102989 libgcc/ * config/aarch64/t-softfp (softfp_extras): Use += rather than :=. * config/i386/64/t-softfp (softfp_extras): Likewise. * config/i386/libgcc-glibc.ver (GCC_14.0.0): Export _BitInt support routines. * config/i386/t-softfp (softfp_extras): Add fixxfbitint and bf, hf and xf mode floatbitint. (CFLAGS-floatbitintbf.c, CFLAGS-floatbitinthf.c): Add -msse2. * config/riscv/t-softfp32 (softfp_extras): Use += rather than :=. * config/rs6000/t-e500v1-fp (softfp_extras): Likewise. * config/rs6000/t-e500v2-fp (softfp_extras): Likewise. * config/t-softfp (softfp_floatbitint_funcs): New. (softfp_bid_list): New. (softfp_func_list): Add sf and df mode from and to _BitInt libcalls. (softfp_bid_file_list): New. (LIB2ADD_ST): Add $(softfp_bid_file_list). * config/t-softfp-sfdftf (softfp_extras): Add fixtfbitint and floatbitinttf. * config/t-softfp-tf (softfp_extras): Likewise. * libgcc2.c (bitint_reduce_prec): New inline function. (BITINT_INC, BITINT_END): Define. (bitint_mul_1, bitint_addmul_1): New helper functions. (__mulbitint3): New function. (bitint_negate, bitint_submul_1): New helper functions. (__divmodbitint4): New function. * libgcc2.h (LIBGCC2_UNITS_PER_WORD): When building _BitInt support libcalls, redefine depending on __LIBGCC_BITINT_LIMB_WIDTH__. (__mulbitint3, __divmodbitint4): Declare. * libgcc-std.ver.in (GCC_14.0.0): Export _BitInt support routines. * Makefile.in (lib2funcs): Add _mulbitint3. (LIB2_DIVMOD_FUNCS): Add _divmodbitint4. * soft-fp/bitint.h: New file. * soft-fp/fixdfbitint.c: New file. * soft-fp/fixsfbitint.c: New file. * soft-fp/fixtfbitint.c: New file. * soft-fp/fixxfbitint.c: New file. * soft-fp/floatbitintbf.c: New file. * soft-fp/floatbitintdf.c: New file. * soft-fp/floatbitinthf.c: New file. * soft-fp/floatbitintsf.c: New file. * soft-fp/floatbitinttf.c: New file. * soft-fp/floatbitintxf.c: New file. * soft-fp/op-common.h (_FP_FROM_INT): Add support for rsize up to 4 * _FP_W_TYPE_SIZE rather than just 2 * _FP_W_TYPE_SIZE. * soft-fp/bitintpow10.c: New file. * soft-fp/fixsdbitint.c: New file. * soft-fp/fixddbitint.c: New file. * soft-fp/fixtdbitint.c: New file. * soft-fp/floatbitintsd.c: New file. * soft-fp/floatbitintdd.c: New file. * soft-fp/floatbitinttd.c: New file.
2023-09-06libgcc: Generated tables for _BitInt <-> _Decimal* conversions [PR102989]Jakub Jelinek1-0/+4947
The following patch adds a header with generated helper tables to support computation of powers of 10 from 10^0 to 10^6111 inclusive into a sufficiently large array of _BitInt limbs. This is split from the rest of the libgcc _BitInt support because it is quite large and together it would run into gcc-patches mail length limits. 2023-09-06 Jakub Jelinek <jakub@redhat.com> PR c/102989 libgcc/ * soft-fp/bitintpow10.h: New file.
2023-09-05Daily bump.GCC Administrator1-0/+4
2023-09-05LoongArch: support loongarch*-elf targetYang Yujie1-2/+7
gcc/ChangeLog: * config.gcc: add loongarch*-elf target. * config/loongarch/elf.h: New file. Link against newlib by default. libgcc/ChangeLog: * config.host: add loongarch*-elf target.
2023-08-12Daily bump.GCC Administrator1-0/+6
2023-08-11preserve base pointer for __deregister_frame [PR110956]Thomas Neumann1-17/+17
Original bug report: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110956 Rainer Orth successfully tested the patch on Solaris with a full bootstrap. Some uncommon unwinding table encodings need to access the base pointer for address computations. We do not have that information in calls to __deregister_frame_info_bases, and previously simply used nullptr as base pointer. That is usually fine, but for some Solaris i386 shared libraries that results in wrong address computations. To fix this problem we now associate the unwinding object with the table pointer itself, which is always known, in addition to the PC range. When deregistering a frame, we first locate the object using the table pointer, and then use the base pointer stored within the object to compute the PC range. libgcc/ChangeLog: PR libgcc/110956 * unwind-dw2-fde.c: Associate object with address of unwinding table.
2023-08-08Daily bump.GCC Administrator1-0/+8
2023-08-07Deprecate a.out support for NetBSD targets.John Ericson1-3/+1
As discussed previously, a.out support is now quite deprecated, and in some cases removed, in both Binutils itself and NetBSD, so this legacy default makes little sense. `netbsdelf*` and `netbsdaout*` still work allowing the user to be explicit about there choice. Additionally, the configure script warns about the change as Nick Clifton requested. One possible concern was the status of NetBSD on NS32K, where only a.out was supported. But per [1] NetBSD has removed support, and if it were to come back, it would be with ELF. The binutils implementation is therefore marked obsolete, per the instructions in the last message. With that patch and this one applied, I have confirmed the following: --target=i686-unknown-netbsd --target=i686-unknown-netbsdelf builds completely --target=i686-unknown-netbsdaout properly fails because target is deprecated. --target=vax-unknown-netbsdaout builds completely except for gas, where the target is deprecated. [1]: https://mail-index.netbsd.org/tech-toolchain/2021/07/19/msg004025.html config/ChangeLog: * picflag.m4: Simplify SHmedia NetBSD match by presuming ELF. gcc/ChangeLog: * configure: Regenerate. libada/ChangeLog: * configure: Regenerate. libgcc/ChangeLog: * configure: Regenerate. libiberty/ChangeLog: * configure: Regenerate.
2023-08-07egrep in binutilsAlan Modra1-1/+1
Apparently some distros have a nagging egrep that helpfully tells you egrep is deprecated and to use "grep -E". The nag message causes a ld testsuite failure. What's more the advice isn't that good. The "-E" flag may not be available with older versions of grep. This patch fixes bare invocation of egrep within binutils, replacing it with the autoconf $EGREP or with grep. config/ChangeLog: * lib-ld.m4 (AC_LIB_PROG_LD_GNU): Require AC_PROG_EGREP and invoke $EGREP. (AC_LIB_PROG_LD): Likewise. gcc/ChangeLog: * configure: Regenerate. intl/ChangeLog: * configure: Regenerate. libcpp/ChangeLog: * configure: Regenerate. libgcc/ChangeLog: * configure: Regenerate. libstdc++-v3/ChangeLog: * configure: Regenerate.
2023-07-24Daily bump.GCC Administrator1-0/+6
2023-07-22Fix PR 110066: crash with -pg -static on riscvAndrew Pinski2-2/+7
The problem -fasynchronous-unwind-tables is on by default for riscv linux We need turn it off for crt*.o because it would make __EH_FRAME_BEGIN__ point to .eh_frame data from crtbeginT.o instead of the user-defined object during static linking. This turns it off. OK? libgcc/ChangeLog: * config.host (riscv*-*-linux*): Add t-crtstuff to tmake_file. (riscv*-*-freebsd*): Likewise. * config/riscv/t-crtstuff: New file.
2023-07-20Daily bump.GCC Administrator1-0/+5
2023-07-19Support type _Float16/__bf16 independent of SSE2.liuhongt1-0/+7
Enable _Float16 and __bf16 all the time but issue errors when the types are used in conversion, unary operation, binary operation, parameter passing or value return when TARGET_SSE2 is not available. Also undef macros which are used by libgcc/libstdc++ to check the backend support of the _Float16/__bf16 types when TARGET_SSE2 is not available. gcc/ChangeLog: PR target/109504 * config/i386/i386-builtins.cc (ix86_register_float16_builtin_type): Remove TARGET_SSE2. (ix86_register_bf16_builtin_type): Ditto. * config/i386/i386-c.cc (ix86_target_macros): When TARGET_SSE2 isn't available, undef the macros which are used to check the backend support of the _Float16/__bf16 types when building libstdc++ and libgcc. * config/i386/i386.cc (construct_container): Issue errors for HFmode/BFmode when TARGET_SSE2 is not available. (function_value_32): Ditto. (ix86_scalar_mode_supported_p): Remove TARGET_SSE2 for HFmode/BFmode. (ix86_libgcc_floating_mode_supported_p): Ditto. (ix86_emit_support_tinfos): Adjust codes. (ix86_invalid_conversion): Return diagnostic message string when there's conversion from/to BF/HFmode w/o TARGET_SSE2. (ix86_invalid_unary_op): New function. (ix86_invalid_binary_op): Ditto. (TARGET_INVALID_UNARY_OP): Define. (TARGET_INVALID_BINARY_OP): Define. * config/i386/immintrin.h [__SSE2__]: Remove for fp16/bf16 related instrinsics header files. * config/i386/i386.h (VALID_SSE2_TYPE_MODE): New macro. gcc/testsuite/ChangeLog: * gcc.target/i386/pr109504.c: New test. * gcc.target/i386/sse2-bfloat16-1.c: Adjust error info. * gcc.target/i386/sse2-float16-1.c: Ditto. * gcc.target/i386/sse2-float16-4.c: New test. * gcc.target/i386/sse2-float16-5.c: New test. * g++.target/i386/float16-1.C: Adjust error info. libgcc/ChangeLog: * config/i386/t-softfp: Add -msse2 to libbid HFtype related files.
2023-07-12Daily bump.GCC Administrator1-0/+6
2023-07-11libgcc: Fix -Wint-conversion warning in find_fde_tailFlorian Weimer1-1/+1
Fixes commit r14-1614-g49310a99330849 ("libgcc: Fix eh_frame fast path in find_fde_tail"). libgcc/ PR libgcc/110179 * unwind-dw2-fde-dip.c (find_fde_tail): Add cast to avoid implicit conversion of pointer value to integer.
2023-07-07Daily bump.GCC Administrator1-0/+5
2023-07-06RISC-V: Handle rouding mode correctly on zfinxKito Cheng1-1/+1
Zfinx has provide fcsr like F, so rouding mode should use fcsr instead of `soft` fenv. libgcc/ChangeLog: * config/riscv/sfp-machine.h (FP_INIT_ROUNDMODE): Check zfinx. (FP_HANDLE_EXCEPTIONS): Ditto.
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