| // 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 -fms-extensions -fms-compatibility-version=19.00 -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]] |
| } |
