forked from OSchip/llvm-project
18 lines
501 B
C
18 lines
501 B
C
// RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
|
|
|
|
#include <immintrin.h>
|
|
|
|
int test_bit_scan_forward(int a) {
|
|
return _bit_scan_forward(a);
|
|
// CHECK: @test_bit_scan_forward
|
|
// CHECK: %[[call:.*]] = call i32 @llvm.cttz.i32(
|
|
// CHECK: ret i32 %[[call]]
|
|
}
|
|
|
|
int test_bit_scan_reverse(int a) {
|
|
return _bit_scan_reverse(a);
|
|
// CHECK: %[[call:.*]] = call i32 @llvm.ctlz.i32(
|
|
// CHECK: %[[sub:.*]] = sub nsw i32 31, %[[call]]
|
|
// CHECK: ret i32 %[[sub]]
|
|
}
|