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llvm-project/clang/test/CodeGen/bitscan-builtins.c

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Adding front-end support to several intrinsics (bit scanning, conversion and state reading intrinsics) Adding LLVM front-end support to two intrinsics dealing with bit scan: _bit_scan_forward and _bit_scan_reverse. Their functionality is as described in Intel intrinsics guide: https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_bit_scan_forward&expand=371,370 https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_bit_scan_reverse&expand=371,370 Furthermore, adding clang front-end support to these conversion intrinsics: _mm256_cvtsd_f64, _mm256_cvtsi256_si32 and _mm256_cvtss_f32. Finally, adding tests to all of the above, as well as to the state reading intrinsics _rdpmc and _rdtsc. Their functionality is also specified in the Intel intrinsics guide. Commit on behalf of Omer Paparo Bivas llvm-svn: 271387
2016-06-01 20:21:00 +08:00
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
// Don't include mm_malloc.h, it's system specific.
#define __MM_MALLOC_H
#include <immintrin.h>
int test_bit_scan_forward(int a) {
return _bit_scan_forward(a);
// CHECK: @test_bit_scan_forward
[immintrin] Reimplement _bit_scan_{forward,reverse} There is no need to use a target-specific intrinsic to implement _bit_scan_forward or _bit_scan_reverse, reimplementing them using generic intrinsics makes it more likely that the middle end will understand what's going on. llvm-svn: 272564
2016-06-14 01:26:16 +08:00
// CHECK: %[[call:.*]] = call i32 @llvm.cttz.i32(
// CHECK: ret i32 %[[call]]
Adding front-end support to several intrinsics (bit scanning, conversion and state reading intrinsics) Adding LLVM front-end support to two intrinsics dealing with bit scan: _bit_scan_forward and _bit_scan_reverse. Their functionality is as described in Intel intrinsics guide: https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_bit_scan_forward&expand=371,370 https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_bit_scan_reverse&expand=371,370 Furthermore, adding clang front-end support to these conversion intrinsics: _mm256_cvtsd_f64, _mm256_cvtsi256_si32 and _mm256_cvtss_f32. Finally, adding tests to all of the above, as well as to the state reading intrinsics _rdpmc and _rdtsc. Their functionality is also specified in the Intel intrinsics guide. Commit on behalf of Omer Paparo Bivas llvm-svn: 271387
2016-06-01 20:21:00 +08:00
}
int test_bit_scan_reverse(int a) {
return _bit_scan_reverse(a);
[immintrin] Reimplement _bit_scan_{forward,reverse} There is no need to use a target-specific intrinsic to implement _bit_scan_forward or _bit_scan_reverse, reimplementing them using generic intrinsics makes it more likely that the middle end will understand what's going on. llvm-svn: 272564
2016-06-14 01:26:16 +08:00
// CHECK: %[[call:.*]] = call i32 @llvm.ctlz.i32(
Test fix -- use captured call result instead of hardcoded %2. llvm-svn: 272573
2016-06-14 02:44:22 +08:00
// CHECK: %[[sub:.*]] = sub nsw i32 31, %[[call]]
[immintrin] Reimplement _bit_scan_{forward,reverse} There is no need to use a target-specific intrinsic to implement _bit_scan_forward or _bit_scan_reverse, reimplementing them using generic intrinsics makes it more likely that the middle end will understand what's going on. llvm-svn: 272564
2016-06-14 01:26:16 +08:00
// CHECK: ret i32 %[[sub]]
Adding front-end support to several intrinsics (bit scanning, conversion and state reading intrinsics) Adding LLVM front-end support to two intrinsics dealing with bit scan: _bit_scan_forward and _bit_scan_reverse. Their functionality is as described in Intel intrinsics guide: https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_bit_scan_forward&expand=371,370 https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_bit_scan_reverse&expand=371,370 Furthermore, adding clang front-end support to these conversion intrinsics: _mm256_cvtsd_f64, _mm256_cvtsi256_si32 and _mm256_cvtss_f32. Finally, adding tests to all of the above, as well as to the state reading intrinsics _rdpmc and _rdtsc. Their functionality is also specified in the Intel intrinsics guide. Commit on behalf of Omer Paparo Bivas llvm-svn: 271387
2016-06-01 20:21:00 +08:00
}