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2016-11-16runtime: replace runtime1.goc with Go and C codeIan Lance Taylor1-1/+1
A step toward eliminating goc2c. Drop the exported parfor code; it was needed for tests in the past, but no longer is. The Go 1.7 runtime no longer uses parfor. Reviewed-on: https://go-review.googlesource.com/33324 From-SVN: r242509
2016-11-16compiler: separate incomparable types from comparable onesIan Lance Taylor2-3/+21
Otherwise we can accidentally and incorrectly mark an actual user type as incomparable. This fixes the gccgo version of https://golang.org/issue/17752. The test case for gccgo is https://golang.org/cl/33249. Reviewed-on: https://go-review.googlesource.com/33292 From-SVN: r242494
2016-11-14runtime: don't crash if signal handler info argument is nilIan Lance Taylor1-1/+1
Apparently on Solaris 10 a SA_SIGINFO signal handler can be invoked with a nil info argument. I would not have believed it but I've now seen it happen, and the sigaction man page actually says "If the second argument is not equal to NULL, it points to a siginfo_t structure...." So, if that happens, don't crash. Also fix another case where we want to make sure that &T{} does not allocate. Reviewed-on: https://go-review.googlesource.com/33150 From-SVN: r242403
2016-11-11libgo: fix GOARCH_INT64ALIGN for several targetsIan Lance Taylor1-1/+1
From Andreas Schwab. Reviewed-on: https://go-review.googlesource.com/33130 From-SVN: r242072
2016-11-10runtime: copy signal code from Go 1.7 runtimeIan Lance Taylor5-5/+15
Add a little shell script to auto-generate runtime.sigtable from the known signal names. Force the main package to always import the runtime package. Otherwise some runtime package global variables may never be initialized. Set the syscallsp and syscallpc fields of g when entering a syscall, so that the runtime package knows when a g is executing a syscall. Fix runtime.funcPC to avoid dead store elimination of the interface value when the function is inlined. Reviewed-on: https://go-review.googlesource.com/33025 From-SVN: r242060
2016-11-09compiler: rework static initializer codeIan Lance Taylor4-73/+140
Rename is_immutable to is_static_initializer to try to capture what it really means. Be more precise about when an address expression, or a binary expression, can be a static initializer. Don't check whether a type has pointers when deciding whether an initializer must be read-write, just check whether it is being used to initialize a global variable. To make that work set the Translate_context function to NULL for a global variable with a static initializer. The effect of this is to let more global variables be initialized directly, rather than being initialized in the generated init function. Reviewed-on: https://go-review.googlesource.com/32917 From-SVN: r242024
2016-11-05re PR go/78172 (gen-sysinfo.go vs AIX cred.h)Ian Lance Taylor1-1/+1
PR go/78172. libgo: avoid confusion in upcase_fields in mksysinfo.sh The mksysinfo.sh script could get confused when there were multiple types starting with the same name. I believe this is the underlying cause of GCC PR 78172. Also redirect a grep to /dev/null to avoid extraneous messages during the build. Reviewed-on: https://go-review.googlesource.com/32821 From-SVN: r241868
2016-11-01libgo: fix GOARCH_PHYSPAGESIZE for ia64Ian Lance Taylor1-1/+1
From Andreas Schwab. Reviewed-on: https://go-review.googlesource.com/32537 From-SVN: r241757
2016-11-01runtime: recreate function called by cgo -gccgoIan Lance Taylor1-1/+1
When using cgo -gccgo calls to C.GoString, C.GoStringN, and C.GoBytes are turned into calls to __go_byte_array_to_string and __go_string_to_byte_array. Those functions were removed when the string code was copied from Go 1.7, but we still need them for cgo. While cgo should be updated, old versions will exist for some time. Reviewed-on: https://go-review.googlesource.com/32474 From-SVN: r241743
2016-11-01libgo: only rebuild package if dependent .gox has changedIan Lance Taylor1-1/+1
Use mvifdiff and stamp files to track whether a .gox file has changed. When package A depends on package B, and we rebuild package B, only rebuild package A if package B's .gox file changes. This is safe because when package A imports package B it only reads package B's .gox file. This means that changes that do not affect export information will not cause dependent packages to be recompiled. Reviewed-on: https://go-review.googlesource.com/32476 From-SVN: r241742
2016-11-01libgo: minor Makefile improvementsIan Lance Taylor1-1/+1
Suggested by Ralph Corderoy. Reviewed-on: https://go-review.googlesource.com/32414 From-SVN: r241741
2016-11-01re PR go/78145 (Several go.test tests fail with error: integer constant ↵Ian Lance Taylor2-2/+2
overflow on 32bit targets) PR go/78145 compiler: don't put print/println constants into temporaries It's not necessary, and it breaks setting their type to int64/uint64 when appropriate. This fixes GCC PR 78145. Reviewed-on: https://go-review.googlesource.com/32475 From-SVN: r241740
2016-10-30compiler: fix slice/array evaluation order bugIan Lance Taylor3-105/+147
There was a phase ordering issue in the handling of "keyed" array literal expressions: the lowering phase was canonicalizing the indices/vals before the phase that fixed evaluation order, meaning that the evaluation order was incorrect. The fix is to capture the orginal ordering and use that ordering when doing traversals (there is already something similar being done for struct literal expressions). Fixes golang/go#17640 Reviewed-on: https://go-review.googlesource.com/32296 From-SVN: r241688
2016-10-30libgo: eliminate a lot of duplication in Makefile.amIan Lance Taylor1-1/+1
I read through the GNU make manual. I knew there had to be a way to do it. Remove the special netgo library. The essential feature--using the Go DNS resolver--is now available by setting GODEBUG=netdns=go. Reviewed-on: https://go-review.googlesource.com/32333 From-SVN: r241687
2016-10-28compiler, runtime: copy slice code from Go 1.7 runtimeIan Lance Taylor5-220/+407
Change the compiler handle append as the gc compiler does: call a function to grow the slice, but otherwise assign the new elements directly to the final slice. For the current gccgo memory allocator the slice code has to call runtime_newarray, not mallocgc directly, so that the allocator sets the TypeInfo_Array bit in the type pointer. Rename the static function cnew to runtime_docnew, so that the stack trace ignores it when ignoring runtime functions. This was needed to fix the runtime/pprof tests on 386. Reviewed-on: https://go-review.googlesource.com/32218 From-SVN: r241667
2016-10-28re PR go/78144 (FAIL: time on systems with tzdata2016g installed)Ian Lance Taylor1-1/+1
PR go/78144 libgo: incorporate fix for timezone test This brings over the test-only fix for issue 17276 into gccgo/libgo (with tzdata-2016g there is a new zone abbreviation). This is a copy of https://golang.org/cl/29995. Reviewed-on: https://go-review.googlesource.com/32182 From-SVN: r241661
2016-10-28re PR go/78143 (bootstrap broken in libgo on powerpc-linux-gnu)Ian Lance Taylor1-1/+1
PR go/78143 runtime: build lfstack_32bit.go on ppc Missed a build tag. This is GCC PR 78143. Reviewed-on: https://go-review.googlesource.com/32295 From-SVN: r241659
2016-10-28libgo: redirect grep output in mkrsysinfo.sh to /dev/nullIan Lance Taylor1-1/+1
I noticed a stray useless output line when building libgo. Reviewed-on: https://go-review.googlesource.com/32294 From-SVN: r241655
2016-10-25go-lang.c: remove a redundant castDavid Malcolm2-3/+7
gcc/go/ChangeLog: * go-lang.c (go_langhook_type_for_mode): Remove redundant cast from result of GET_MODE_CLASS. Minor formatting fixes. From-SVN: r241514
2016-10-21libgo: keep c0 and c1 out of runtime.incIan Lance Taylor1-1/+1
The constants named c0 and c1 turn up as macros in runtime.inc. This reportedly breaks building on Solaris 11, where there is a system struct that has a field named c1. The constants aren't needed by the runtime C code, so avoid the problem by grepping them out. Reviewed-on: https://go-review.googlesource.com/31730 From-SVN: r241432
2016-10-21libgo: leave Int64Align as 8 on 32-bit SPARCIan Lance Taylor1-1/+1
Verified by testing on SPARC Solaris. Reviewed-on: https://go-review.googlesource.com/31675 From-SVN: r241430
2016-10-21runtime: copy lfstack code from Go 1.7 runtimeIan Lance Taylor1-1/+1
Note that lfstack_64bit.go was modified for Solaris support in a different, and better, way than the superseded lfstack.goc code. Reviewed-on: https://go-review.googlesource.com/31673 From-SVN: r241427
2016-10-20runtime: rewrite interface code into GoIan Lance Taylor6-50/+66
I started to copy the Go 1.7 interface code, but the gc and gccgo representations of interfaces are too different. So instead I rewrote the gccgo interface code from C to Go. The code is largely the same as it was, but the names are more like those used in the gc runtime. I also copied over the string comparison functions, and tweaked the compiler to use eqstring when comparing strings for equality. Reviewed-on: https://go-review.googlesource.com/31591 From-SVN: r241384
2016-10-19runtime, syscall: force EPOLLET to be positiveIan Lance Taylor1-1/+1
The C definition is 1U << 31. Reportedly on some systems GCC's -fgo-dump-spec can print this as -2147483648. Reviewed-on: https://go-review.googlesource.com/31448 From-SVN: r241347
2016-10-18runtime: copy netpoll code from Go 1.7 runtimeIan Lance Taylor1-1/+1
Reviewed-on: https://go-review.googlesource.com/31325 From-SVN: r241307
2016-10-18runtime: scan caller-saved registers for non-split-stackIan Lance Taylor1-1/+1
While testing a patch on Solaris, which does not support split-stack, I ran across a bug in the handling of caller-saved registers for the garbage collector. For non-split-stack systems, runtime_mcall is responsible for saving all caller-saved registers on the stack so that the GC stack scan will see them. It does this by calling __builtin_unwind_init and setting the g's gcnextsp field to point to the current stack. The garbage collector then scans the stack from gcnextsp to the top of stack. Unfortunately, the code was setting gcnextsp to point to runtime_mcall's argument, which meant that even though runtime_mcall was careful to store all caller-saved registers on the stack, the GC never saw them. This is, of course, only a problem if a value lives only in a caller-saved register, and not anywhere else on the stack or heap. And it is only a problem if that caller-saved register manages to make it all the way down to runtime_mcall without being saved by any function on the way. This is moderately unlikely but it turns out that the recent changes to keep values on the stack when compiling the runtime package caused it to happen for the local variable `s` in `notifyListWait` in runtime/sema.go. That function calls goparkunlock which is simple enough to not require all registers, and itself calls runtime_mcall. So it was possible for `s` to be released by the GC before the goroutine returned from goparkunlock, which eventually caused a dangling pointer to be passed to releaseSudog. This is not a problem on split-stack systems, which use __splitstack_get_context, which saves a stack pointer low enough on the stack to scan the registers saved by runtime_mcall. Reviewed-on: https://go-review.googlesource.com/31323 From-SVN: r241304
2016-10-17runtime: copy rdebug code from Go 1.7 runtimeIan Lance Taylor1-1/+1
While we're at it, update the runtime/debug package, and start running its testsuite by default. I'm not sure why runtime/debug was not previously updated to 1.7. Doing that led me to fix some minor aspects of runtime.Stack and the C function runtime/debug.readGCStats. Reviewed-on: https://go-review.googlesource.com/31251 From-SVN: r241261
2016-10-15runtime: copy runtime package time code from Go 1.7Ian Lance Taylor2-2/+2
Fix handling of function values for -fgo-c-header to generate FuncVal*, not simply FuncVal. While we're here change runtime.nanotime to use clock_gettime with CLOCK_MONOTONIC, rather than gettimeofday. This is what the gc library does. It provides nanosecond precision and a monotonic clock. Reviewed-on: https://go-review.googlesource.com/31232 From-SVN: r241197
2016-10-14runtime: copy mprof code from Go 1.7 runtimeIan Lance Taylor2-3/+14
Also create a gccgo version of some of the traceback code in traceback_gccgo.go, replacing some code currently in C. This required modifying the compiler so that when compiling the runtime package a slice expression does not cause a local array variable to escape to the heap. Reviewed-on: https://go-review.googlesource.com/31230 From-SVN: r241189
2016-10-14runtime: just do file/line lookup in C, move Func to GoIan Lance Taylor1-1/+1
In order to port stack backtraces to Go, we need the ability to look up file/line information for PC values without allocating memory. This patch moves the handling of Func from C code to Go code, and simplifies the C code to just look up function/file/line/entry information for a PC. Reviewed-on: https://go-review.googlesource.com/31150 From-SVN: r241172
2016-10-14debug/elf: add sparc64 relocationsIan Lance Taylor1-1/+1
This is a backport of https://go-review.googlesource.com/30870. Reviewed-on: https://go-review.googlesource.com/30916 From-SVN: r241171
2016-10-14runtime: copy cpuprof code from Go 1.7 runtimeIan Lance Taylor3-61/+59
This replaces runtime/cpuprof.goc with go/runtime/cpuprof.go and adjusts the supporting code in runtime/proc.c. This adds another case where the compiler needs to avoid heap allocation in the runtime package: when evaluating a method expression into a closure. Implementing this required moving the relevant code from do_get_backend to do_flatten, so that I could easily add a temporary variable. Doing that let me get rid of Bound_method_expression::do_lower. Reviewed-on: https://go-review.googlesource.com/31050 From-SVN: r241163
2016-10-13compiler: don't try to get backend representation of redefinitionIan Lance Taylor2-1/+9
Trying to get the backend representation of a redefined name can cause a compiler crash as the compiler can walk over the same statements a second time. It's also quite unlikely to produce any additional useful error messages for the user. Test case follows. I'm not going to bother adding this test case to the testsuite--crash-on-invalid cases are worth fixing but not worth continually retesting. package p type A []int func (a A) Sum() (sum int) { for _, v := range a { sum += v } return sum } type A []int func (a A) Sum() (sum int) { for _, v := range a { sum += v } return sum } Reviewed-on: https://go-review.googlesource.com/30976 From-SVN: r241127
2016-10-13runtime: copy mstats code from Go 1.7 runtimeIan Lance Taylor2-1/+16
This replaces mem.go and the C runtime_ReadMemStats function with the Go 1.7 mstats.go. The GCStats code is commented out for now. The corresponding gccgo code is in runtime/mgc0.c. The variables memstats and worldsema are shared between the Go code and the C code, but are not exported. To make this work, add temporary accessor functions acquireWorldsema, releaseWorldsema, getMstats (the latter known as mstats in the C code). Check the preemptoff field of m when allocating and when considering whether to start a GC. This works with the new stopTheWorld and startTheWorld functions in Go, which are essentially the Go 1.7 versions. Change the compiler to stack allocate closures when compiling the runtime package. Within the runtime packages closures do not escape. This is similar to what the gc compiler does, except that the gc compiler, when compiling the runtime package, gives an error if escape analysis shows that a closure does escape. I added this here because the Go version of ReadMemStats calls systemstack with a closure, and having that allocate memory was causing some tests that measure memory allocations to fail. Reviewed-on: https://go-review.googlesource.com/30972 From-SVN: r241124
2016-10-13Move MEMMODEL_* from coretypes.h to memmodel.hThomas Preud'homme2-0/+5
2016-10-13 Thomas Preud'homme <thomas.preudhomme@arm.com> gcc/ * coretypes.h: Move MEMMODEL_* macros and enum memmodel definition into ... * memmodel.h: This file. * alias.c, asan.c, auto-inc-dec.c, bb-reorder.c, bt-load.c, caller-save.c, calls.c, ccmp.c, cfgbuild.c, cfgcleanup.c, cfgexpand.c, cfgloopanal.c, cfgrtl.c, cilk-common.c, combine.c, combine-stack-adj.c, common/config/aarch64/aarch64-common.c, common/config/arm/arm-common.c, common/config/bfin/bfin-common.c, common/config/c6x/c6x-common.c, common/config/i386/i386-common.c, common/config/ia64/ia64-common.c, common/config/nvptx/nvptx-common.c, compare-elim.c, config/aarch64/aarch64-builtins.c, config/aarch64/aarch64-c.c, config/aarch64/cortex-a57-fma-steering.c, config/arc/arc.c, config/arc/arc-c.c, config/arm/arm-builtins.c, config/arm/arm-c.c, config/avr/avr.c, config/avr/avr-c.c, config/avr/avr-log.c, config/bfin/bfin.c, config/c6x/c6x.c, config/cr16/cr16.c, config/cris/cris.c, config/darwin-c.c, config/darwin.c, config/epiphany/epiphany.c, config/epiphany/mode-switch-use.c, config/epiphany/resolve-sw-modes.c, config/fr30/fr30.c, config/frv/frv.c, config/ft32/ft32.c, config/h8300/h8300.c, config/i386/i386-c.c, config/i386/winnt.c, config/iq2000/iq2000.c, config/lm32/lm32.c, config/m32c/m32c.c, config/m32r/m32r.c, config/m68k/m68k.c, config/mcore/mcore.c, config/microblaze/microblaze.c, config/mmix/mmix.c, config/mn10300/mn10300.c, config/moxie/moxie.c, config/msp430/msp430.c, config/nds32/nds32-cost.c, config/nds32/nds32-intrinsic.c, config/nds32/nds32-md-auxiliary.c, config/nds32/nds32-memory-manipulation.c, config/nds32/nds32-predicates.c, config/nds32/nds32.c, config/nios2/nios2.c, config/nvptx/nvptx.c, config/pa/pa.c, config/pdp11/pdp11.c, config/rl78/rl78.c, config/rs6000/rs6000-c.c, config/rx/rx.c, config/s390/s390-c.c, config/s390/s390.c, config/sh/sh.c, config/sh/sh-c.c, config/sh/sh-mem.cc, config/sh/sh_treg_combine.cc, config/sol2.c, config/spu/spu.c, config/stormy16/stormy16.c, config/tilegx/tilegx.c, config/tilepro/tilepro.c, config/v850/v850.c, config/vax/vax.c, config/visium/visium.c, config/vms/vms-c.c, config/xtensa/xtensa.c, coverage.c, cppbuiltin.c, cprop.c, cse.c, cselib.c, dbxout.c, dce.c, df-core.c, df-problems.c, df-scan.c, dojump.c, dse.c, dwarf2asm.c, dwarf2cfi.c, dwarf2out.c, emit-rtl.c, except.c, explow.c, expmed.c, expr.c, final.c, fold-const.c, function.c, fwprop.c, gcse.c, ggc-page.c, haifa-sched.c, hsa-brig.c, hsa-gen.c, hw-doloop.c, ifcvt.c, init-regs.c, internal-fn.c, ira-build.c, ira-color.c, ira-conflicts.c, ira-costs.c, ira-emit.c, ira-lives.c, ira.c, jump.c, loop-doloop.c, loop-invariant.c, loop-iv.c, loop-unroll.c, lower-subreg.c, lra.c, lra-assigns.c, lra-coalesce.c, lra-constraints.c, lra-eliminations.c, lra-lives.c, lra-remat.c, lra-spills.c, mode-switching.c, modulo-sched.c, omp-low.c, passes.c, postreload-gcse.c, postreload.c, predict.c, print-rtl-function.c, recog.c, ree.c, reg-stack.c, regcprop.c, reginfo.c, regrename.c, reload.c, reload1.c, reorg.c, resource.c, rtl-chkp.c, rtl-tests.c, rtlanal.c, rtlhooks.c, sched-deps.c, sched-rgn.c, sdbout.c, sel-sched-ir.c, sel-sched.c, shrink-wrap.c, simplify-rtx.c, stack-ptr-mod.c, stmt.c, stor-layout.c, target-globals.c, targhooks.c, toplev.c, tree-nested.c, tree-outof-ssa.c, tree-profile.c, tree-ssa-coalesce.c, tree-ssa-ifcombine.c, tree-ssa-loop-ivopts.c, tree-ssa-loop.c, tree-ssa-reassoc.c, tree-ssa-sccvn.c, tree-vect-data-refs.c, ubsan.c, valtrack.c, var-tracking.c, varasm.c: Include memmodel.h. * genattrtab.c (write_header): Include memmodel.h in generated file. * genautomata.c (main): Likewise. * gengtype.c (open_base_files): Likewise. * genopinit.c (main): Likewise. * genconditions.c (write_header): Include memmodel.h earlier in generated file. * genemit.c (main): Likewise. * genoutput.c (output_prologue): Likewise. * genpeep.c (main): Likewise. * genpreds.c (write_insn_preds_c): Likewise. * genrecog.c (write_header): Likewise. * Makefile.in (PLUGIN_HEADERS): Include memmodel.h gcc/ada/ * gcc-interface/utils2.c: Include memmodel.h. gcc/c-family/ * c-cppbuiltin.c: Include memmodel.h. * c-opts.c: Likewise. * c-pragma.c: Likewise. * c-warn.c: Likewise. gcc/c/ * c-typeck.c: Include memmodel.h. gcc/cp/ * decl2.c: Include memmodel.h. * rtti.c: Likewise. gcc/fortran/ * trans-intrinsic.c: Include memmodel.h. gcc/go/ * go-backend.c: Include memmodel.h. libgcc/ * libgcov-profiler.c: Replace MEMMODEL_* macros by their __ATOMIC_* equivalent. * config/tilepro/atomic.c: Likewise and stop casting model to enum memmodel. From-SVN: r241121
2016-10-13syscall: don't use pt_regs in clone_linux.cIan Lance Taylor1-1/+1
It's unnecessary and it reportedly breaks the build on arm64 GNU/Linux. Reviewed-on: https://go-review.googlesource.com/30978 From-SVN: r241084
2016-10-12compiler, runtime: copy string code from Go 1.7Ian Lance Taylor6-76/+391
Add compiler support for turning concatenating strings into a call to a runtime function that takes the appropriate number of arguments. Rename some local variables in mgc0.c to avoid macros that the new rune.go causes to appear in runtime.inc. Reviewed-on: https://go-review.googlesource.com/30827 From-SVN: r241074
2016-10-12syscall: mark rawClone as no_split_stackIan Lance Taylor1-1/+1
Reviewed-on: https://go-review.googlesource.com/30955 From-SVN: r241072
2016-10-12runtime: copy Go 1.7 runtime semaphore codeIan Lance Taylor1-1/+1
This triggered a check in releaseSudog that g.param not nil, because libgo uses the param field when starting a goroutine. Fixed by clearing g->param in kickoff in proc.c. Reviewed-on: https://go-review.googlesource.com/30951 From-SVN: r241067
2016-10-12syscall, internal/syscall/unix: Fix getrandom, clone on sparc64Ian Lance Taylor1-1/+1
Since sparc is a valid architecture, the name of getrandom_linux_sparc.go means that it will be ignored on sparc64, even though it's whitelisted with a +build line. On SPARC, clone has a unique return value convention which requires some inline assembly to convert it to the normal convention. Reviewed-on: https://go-review.googlesource.com/30873 From-SVN: r241051
2016-10-11configure: redirect -fsplit-stack compilation to dev/nullIan Lance Taylor1-1/+1
Avoid an error message in the middle of the configure output. Patch by Eric Botcazou. Reviewed-on: https://go-review.googlesource.com/30813 From-SVN: r240993
2016-10-11compiler: move Backend/Linemap creation out of front end.Than McIntosh10-14/+58
Push the calls to create Backend and Linemap object out of the front end into the back end, and instead pass pointers to these objects in the go_create_gogo_args struct. This allows for more flexibility in the interfaces used to create the objects. Reviewed-on: https://go-review.googlesource.com/30698 * go-gcc.h: New file. * go-c.h (struct go_create_gogo_args): Add backend and linemap fields. * go-lang.c: Include "go-gcc.h". (go_langhook_init): Set linemap and backend fields of args. * go-gcc.cc: Include "go-gcc.h". * go-linemap.cc: Include "go-gcc.h". From-SVN: r240959
2016-10-10runtime: copy print/println support from Go 1.7Ian Lance Taylor3-43/+61
Update the compiler to use the new names. Add calls to printlock and printunlock around print statements. Move expression evaluation before the call to printlock. Update g's writebuf field to a slice, and adjust C code accordingly. Reviewed-on: https://go-review.googlesource.com/30717 From-SVN: r240956
2016-10-10compiler: prune away gcc-specific linemap usageThan McIntosh5-2/+28
Add an interface to the go Linemap class to allow clients to ask for the line number for a Location (for debugging dumps), so as to move some gcc-specific location code into the back end. Reviewed-on: https://go-review.googlesource.com/30699 * go-linemap.cc (Gcc_linemap::location_line): New method. From-SVN: r240942
2016-10-10runtime: copy channel code from Go 1.7 runtimeIan Lance Taylor7-57/+118
Change the compiler to use the new routines. Drop the separation of small and large values when sending on a channel. Allocate the select struct on the stack. Remove the old C implementation of channels. Adjust the garbage collector for the new data structure. Bring in part of the tracing code, enough for the channel code to call. Bump the permitted number of allocations in one of the tests in context_test.go. The difference is that now receiving from a channel allocates a sudog, which the C code used to simply put on the stack. This will be somewhat better when we port proc.go. Reviewed-on: https://go-review.googlesource.com/30714 From-SVN: r240941
2016-10-10* config-lang.in (lang_requires_boot_languages): Delete.Eric Botcazou2-4/+4
From-SVN: r240909
2016-10-07compiler: stack allocate storage for temp slices.Ian Lance Taylor3-24/+144
During the lowering phase, the variable arguments to a varargs call are packaged up into a temporary slice object; the storage for this slice was being unconditionally allocated on the heap. Heap allocation is not necessary, however, if the varargs call correspond to an "append", since the append runtime routine only reads the slice storage (as opposed to stashing away the storage pointer). Enhance the lowering code to keep the slice storage on the stack for append() calls, to improve performance. Addresses issue golang/go#17304. Reviewed-on: https://go-review.googlesource.com/30136 From-SVN: r240853
2016-10-06go-gcc.cc (Gcc_backend::stack_allocation_expression): Clear the returned memory.Chris Manghane2-0/+8
* go-gcc.cc (Gcc_backend::stack_allocation_expression): Clear the returned memory. From-SVN: r240840
2016-10-06escape: Avoid allocation of varargs parameter.Ian Lance Taylor2-2/+32
There was a bug in the escape analysis that would cause the slice implicitly created to hold varargs parameters to always escape, as well as the appended to slice argument. The intended behavior was that the elements of the appendee and appended to slice would escape to the heap. Alongside of these issues, the varargs slice would also have a chance to be initialized to an invalid memory location if it were stack-allocated. This has been fixed as well. Reviewed-on: https://go-review.googlesource.com/30450 From-SVN: r240826
2016-10-03re PR go/77809 ("_LITTLE_ENDIAN" redefined)Ian Lance Taylor1-1/+1
PR go/77809 libgo: strip most C macros from runtime.inc The Go runtime package is picking up C macros from runtime_sysinfo.go and then re-exporting them to runtime.inc. This can cause name conflicts. Change the Makefile so that we only put the macros we need into runtime.inc. These are the constants that are actually defined by Go code, not runtime_sysinfo.go. There are only a few, so we can pattern match. This is an additional hack on runtime.inc. The long term goal is to convert the runtime package to Go and eliminate runtime.inc entirely, so a few hacks seem acceptable. Fixes GCC PR 77809. Reviewed-on: https://go-review.googlesource.com/30167 From-SVN: r240724
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