| Elad Cohen | b107a22 | 2016-09-28 11:59:09 +0000 | [diff] [blame^] | 1 | // RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s |
| Michael Zuckerman | e54093f | 2016-06-01 12:21:00 +0000 | [diff] [blame] | 2 | |
| Michael Zuckerman | e54093f | 2016-06-01 12:21:00 +0000 | [diff] [blame] | 3 | #include <immintrin.h> |
| 4 | |
| 5 | int test_bit_scan_forward(int a) { |
| 6 | return _bit_scan_forward(a); |
| 7 | // CHECK: @test_bit_scan_forward |
| David Majnemer | d423574 | 2016-06-13 17:26:16 +0000 | [diff] [blame] | 8 | // CHECK: %[[call:.*]] = call i32 @llvm.cttz.i32( |
| 9 | // CHECK: ret i32 %[[call]] |
| Michael Zuckerman | e54093f | 2016-06-01 12:21:00 +0000 | [diff] [blame] | 10 | } |
| 11 | |
| 12 | int test_bit_scan_reverse(int a) { |
| 13 | return _bit_scan_reverse(a); |
| David Majnemer | d423574 | 2016-06-13 17:26:16 +0000 | [diff] [blame] | 14 | // CHECK: %[[call:.*]] = call i32 @llvm.ctlz.i32( |
| Artem Belevich | 6530a3e | 2016-06-13 18:44:22 +0000 | [diff] [blame] | 15 | // CHECK: %[[sub:.*]] = sub nsw i32 31, %[[call]] |
| David Majnemer | d423574 | 2016-06-13 17:26:16 +0000 | [diff] [blame] | 16 | // CHECK: ret i32 %[[sub]] |
| Michael Zuckerman | e54093f | 2016-06-01 12:21:00 +0000 | [diff] [blame] | 17 | } |