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X86 Intrinsics: _bit_scan_forward should not be under #ifdef __RDRND__ 

Summary:
The _bit_scan_forward and _bit_scan_reverse intrinsics were accidentally
masked under the preprocessor checks that prune intrinsics definitions for the
benefit of faster compile-time on Windows. This patch moves the
definitons out of that region.

Fixes pr33722

Reviewers: craig.topper, aaboud, thakis

Reviewed By: craig.topper

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D35184

llvm-svn: 307524
This commit is contained in:
Zvi Rackover 2017-07-10 07:13:56 +00:00
parent 70b1af5921
commit 064f00061b
2 changed files with 12 additions and 9 deletions
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18
clang/lib/Headers/immintrin.h
View File

@ -212,6 +212,15 @@ _rdrand32_step(unsigned int *__p)
return __builtin_ia32_rdrand32_step(__p);
}
#ifdef __x86_64__
static __inline__ int __attribute__((__always_inline__, __nodebug__, __target__("rdrnd")))
_rdrand64_step(unsigned long long *__p)
{
return __builtin_ia32_rdrand64_step(__p);
}
#endif
#endif /* __RDRND__ */
/* __bit_scan_forward */
static __inline__ int __attribute__((__always_inline__, __nodebug__))
_bit_scan_forward(int __A) {
@ -224,15 +233,6 @@ _bit_scan_reverse(int __A) {
return 31 - __builtin_clz(__A);
}
#ifdef __x86_64__
static __inline__ int __attribute__((__always_inline__, __nodebug__, __target__("rdrnd")))
_rdrand64_step(unsigned long long *__p)
{
return __builtin_ia32_rdrand64_step(__p);
}
#endif
#endif /* __RDRND__ */
#if !defined(_MSC_VER) || __has_feature(modules) || defined(__FSGSBASE__)
#ifdef __x86_64__
static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))

3
clang/test/CodeGen/bitscan-builtins.c
View File

@ -1,5 +1,8 @@
// RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
// PR33722
// RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -D_MSC_VER -emit-llvm -o - %s | FileCheck %s
#include <immintrin.h>
int test_bit_scan_forward(int a) {