xref: /aosp_15_r20/external/clang/test/CodeGen/bitscan-builtins.c (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
2*67e74705SXin Li 
3*67e74705SXin Li // Don't include mm_malloc.h, it's system specific.
4*67e74705SXin Li #define __MM_MALLOC_H
5*67e74705SXin Li #include <immintrin.h>
6*67e74705SXin Li 
test_bit_scan_forward(int a)7*67e74705SXin Li int test_bit_scan_forward(int a) {
8*67e74705SXin Li   return _bit_scan_forward(a);
9*67e74705SXin Li // CHECK: @test_bit_scan_forward
10*67e74705SXin Li // CHECK: %[[call:.*]] = call i32 @llvm.cttz.i32(
11*67e74705SXin Li // CHECK: ret i32 %[[call]]
12*67e74705SXin Li }
13*67e74705SXin Li 
test_bit_scan_reverse(int a)14*67e74705SXin Li int test_bit_scan_reverse(int a) {
15*67e74705SXin Li   return _bit_scan_reverse(a);
16*67e74705SXin Li // CHECK:  %[[call:.*]] = call i32 @llvm.ctlz.i32(
17*67e74705SXin Li // CHECK:  %[[sub:.*]] = sub nsw i32 31, %[[call]]
18*67e74705SXin Li // CHECK: ret i32 %[[sub]]
19*67e74705SXin Li }
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