runtime: use builtin memmove directly
We can use the intrinsic memmove directly, without going through
C.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/170004
* go-gcc.cc (Gcc_backend::Gcc_backend): Define memmove builtin.
From-SVN: r271016
This commit is contained in:
Cherry Zhang
Ian Lance Taylor
parent
5345ac5a11
commit
fbe4e644c0
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@ -1,3 +1,7 @@
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2019-05-08 Cherry Zhang <cherryyz@google.com>
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* go-gcc.cc (Gcc_backend::Gcc_backend): Define memmove builtin.
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2019-05-07 Cherry Zhang <cherryyz@google.com>
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* lang.opt (-fgo-debug-optimization): New option.
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@ -604,6 +604,15 @@ Gcc_backend::Gcc_backend()
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NULL_TREE),
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false, false);
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// We use __builtin_memmove for copying data.
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this->define_builtin(BUILT_IN_MEMMOVE, "__builtin_memmove", "memmove",
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build_function_type_list(void_type_node,
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ptr_type_node,
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const_ptr_type_node,
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size_type_node,
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NULL_TREE),
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false, false);
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// Used by runtime/internal/sys.
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this->define_builtin(BUILT_IN_CTZ, "__builtin_ctz", "ctz",
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build_function_type_list(integer_type_node,
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@ -1,4 +1,4 @@
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0b4cf8ded107ccbfbd4af7f4e056f23f941d0f86
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3a9bccfbf4af1c756978c40967838d9f6a4e7a62
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The first line of this file holds the git revision number of the last
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merge done from the gofrontend repository.
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@ -461,7 +461,6 @@ runtime_files = \
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runtime/go-memclr.c \
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runtime/go-memcmp.c \
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runtime/go-memequal.c \
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runtime/go-memmove.c \
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runtime/go-nanotime.c \
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runtime/go-now.c \
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runtime/go-nosys.c \
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@ -245,16 +245,15 @@ am__objects_3 = runtime/aeshash.lo runtime/go-assert.lo \
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runtime/go-ffi.lo runtime/go-fieldtrack.lo \
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runtime/go-matherr.lo runtime/go-memclr.lo \
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runtime/go-memcmp.lo runtime/go-memequal.lo \
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runtime/go-memmove.lo runtime/go-nanotime.lo runtime/go-now.lo \
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runtime/go-nosys.lo runtime/go-reflect-call.lo \
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runtime/go-runtime-error.lo runtime/go-setenv.lo \
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runtime/go-signal.lo runtime/go-strslice.lo \
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runtime/go-typedesc-equal.lo runtime/go-unsafe-pointer.lo \
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runtime/go-unsetenv.lo runtime/go-unwind.lo \
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runtime/go-varargs.lo runtime/env_posix.lo runtime/panic.lo \
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runtime/print.lo runtime/proc.lo runtime/runtime_c.lo \
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runtime/stack.lo runtime/yield.lo $(am__objects_1) \
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$(am__objects_2)
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runtime/go-nanotime.lo runtime/go-now.lo runtime/go-nosys.lo \
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runtime/go-reflect-call.lo runtime/go-runtime-error.lo \
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runtime/go-setenv.lo runtime/go-signal.lo \
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runtime/go-strslice.lo runtime/go-typedesc-equal.lo \
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runtime/go-unsafe-pointer.lo runtime/go-unsetenv.lo \
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runtime/go-unwind.lo runtime/go-varargs.lo \
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runtime/env_posix.lo runtime/panic.lo runtime/print.lo \
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runtime/proc.lo runtime/runtime_c.lo runtime/stack.lo \
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runtime/yield.lo $(am__objects_1) $(am__objects_2)
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am_libgo_llgo_la_OBJECTS = $(am__objects_3)
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libgo_llgo_la_OBJECTS = $(am_libgo_llgo_la_OBJECTS)
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AM_V_lt = $(am__v_lt_@AM_V@)
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@ -882,7 +881,6 @@ runtime_files = \
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runtime/go-memclr.c \
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runtime/go-memcmp.c \
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runtime/go-memequal.c \
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runtime/go-memmove.c \
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runtime/go-nanotime.c \
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runtime/go-now.c \
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runtime/go-nosys.c \
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@ -1337,8 +1335,6 @@ runtime/go-memcmp.lo: runtime/$(am__dirstamp) \
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runtime/$(DEPDIR)/$(am__dirstamp)
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runtime/go-memequal.lo: runtime/$(am__dirstamp) \
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runtime/$(DEPDIR)/$(am__dirstamp)
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runtime/go-memmove.lo: runtime/$(am__dirstamp) \
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runtime/$(DEPDIR)/$(am__dirstamp)
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runtime/go-nanotime.lo: runtime/$(am__dirstamp) \
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runtime/$(DEPDIR)/$(am__dirstamp)
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runtime/go-now.lo: runtime/$(am__dirstamp) \
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@ -1431,7 +1427,6 @@ distclean-compile:
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@AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/go-memclr.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/go-memcmp.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/go-memequal.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/go-memmove.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/go-nanotime.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/go-nosys.Plo@am__quote@
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@AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/go-now.Plo@am__quote@
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@ -100,6 +100,7 @@ func reflect_memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr) {
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// memmove copies n bytes from "from" to "to".
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//go:noescape
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//extern __builtin_memmove
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func memmove(to, from unsafe.Pointer, n uintptr)
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//go:linkname reflect_memmove reflect.memmove
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@ -1,16 +0,0 @@
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/* go-memmove.c -- move one memory buffer to another
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Copyright 2016 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file. */
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#include "runtime.h"
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void move(void *, void *, uintptr)
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__asm__ (GOSYM_PREFIX "runtime.memmove");
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void
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move (void *p1, void *p2, uintptr len)
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{
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__builtin_memmove (p1, p2, len);
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}
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