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[X86] Assume alignment of movdir64b dst argument 

Reviewers: craig.topper

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D46683

llvm-svn: 332091
This commit is contained in:
Gabor Buella 2018-05-11 14:22:04 +00:00
parent ead11e4d4b
commit 9cd4f16601
2 changed files with 13 additions and 3 deletions
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9
clang/lib/Headers/movdirintrin.h
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@ -47,10 +47,15 @@ _directstoreu_u64 (void *__dst, unsigned long __value)
#endif /* __x86_64__ */
// Move 64 bytes as direct store
/*
* movdir64b - Move 64 bytes as direct store.
* The destination must be 64 byte aligned, and the store is atomic.
* The source address has no alignment requirement, and the load from
* the source address is not atomic.
*/
static __inline__ void
__attribute__((__always_inline__, __nodebug__, __target__("movdir64b")))
_movdir64b (void *__dst, const void *__src)
_movdir64b (void *__dst __attribute__((align_value(64))), const void *__src)
{
__builtin_ia32_movdir64b(__dst, __src);
}

7
clang/test/CodeGen/builtin-movdir.c
View File

@ -1,5 +1,5 @@
// RUN: %clang_cc1 -ffreestanding -Wall -pedantic -triple x86_64-unknown-unknown -target-feature +movdiri -target-feature +movdir64b %s -emit-llvm -o - | FileCheck %s --check-prefix=X86_64 --check-prefix=CHECK
// RUN: %clang_cc1 -ffreestanding -Wall -pedantic -triple i386-unknown-unknown -target-feature +movdiri -target-feature +movdir64b %s -emit-llvm -o - | FileCheck %s --check-prefix=CHECK
// RUN: %clang_cc1 -ffreestanding -Wall -pedantic -triple i386-unknown-unknown -target-feature +movdiri -target-feature +movdir64b %s -emit-llvm -o - | FileCheck %s --check-prefix=X86 --check-prefix=CHECK
#include <x86intrin.h>
#include <stdint.h>
@ -22,6 +22,11 @@ void test_directstore64(void *dst, uint64_t value) {
void test_dir64b(void *dst, const void *src) {
// CHECK-LABEL: test_dir64b
// CHECK: [[PTRINT1:%.+]] = ptrtoint
// X86: [[MASKEDPTR1:%.+]] = and i32 [[PTRINT1]], 63
// X86: [[MASKCOND1:%.+]] = icmp eq i32 [[MASKEDPTR1]], 0
// X86_64: [[MASKEDPTR1:%.+]] = and i64 [[PTRINT1]], 63
// X86_64: [[MASKCOND1:%.+]] = icmp eq i64 [[MASKEDPTR1]], 0
// CHECK: call void @llvm.x86.movdir64b
_movdir64b(dst, src);
}