1 // RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
4 // RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -D_MSC_VER -emit-llvm -o - %s | FileCheck %s
8 int test_bit_scan_forward(int a) {
9 return _bit_scan_forward(a);
10 // CHECK: @test_bit_scan_forward
11 // CHECK: %[[call:.*]] = call i32 @llvm.cttz.i32(
12 // CHECK: ret i32 %[[call]]
15 int test_bit_scan_reverse(int a) {
16 return _bit_scan_reverse(a);
17 // CHECK: %[[call:.*]] = call i32 @llvm.ctlz.i32(
18 // CHECK: %[[sub:.*]] = sub nsw i32 31, %[[call]]
19 // CHECK: ret i32 %[[sub]]