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Add MS __nop intrinsic to intrin.h 

Summary: There was no definition for __nop function - added inline
assembly.

Patch by Albert Gutowski!

Reviewers: rnk, thakis

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D24286

llvm-svn: 280826
This commit is contained in:
Reid Kleckner 2016-09-07 16:55:12 +00:00
parent 3f1ec62a83
commit 5de2bcdcf6
2 changed files with 6 additions and 0 deletions
clang
lib/Headers
intrin.h
test/Headers
ms-intrin.cpp

5
clang/lib/Headers/intrin.h
View File

@ -97,6 +97,7 @@ static __inline__
void __movsd(unsigned long *, unsigned long const *, size_t);
static __inline__
void __movsw(unsigned short *, unsigned short const *, size_t);
static __inline__
void __nop(void);
void __nvreg_restore_fence(void);
void __nvreg_save_fence(void);
@ -918,6 +919,10 @@ static __inline__ void __DEFAULT_FN_ATTRS
__halt(void) {
__asm__ volatile ("hlt");
}
static __inline__ void __DEFAULT_FN_ATTRS
__nop(void) {
__asm__ volatile ("nop");
}
#endif
/*----------------------------------------------------------------------------*\

1
clang/test/Headers/ms-intrin.cpp
View File

@ -52,6 +52,7 @@ void f() {
__cpuidex(info, 0, 0);
_xgetbv(0);
__halt();
__nop();
__readmsr(0);
// FIXME: Call these in 64-bit too once the intrinsics have been fixed to