1 // RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
2
3 // PR33722
4 // RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -fms-extensions -fms-compatibility-version=19.00 -emit-llvm -o - %s | FileCheck %s
5
6 #include <x86intrin.h>
7
test_bit_scan_forward(int a)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(i32 %{{.*}}, i1 true)
12 // CHECK: ret i32 %[[call]]
13 }
14
test_bit_scan_reverse(int a)15 int test_bit_scan_reverse(int a) {
16 return _bit_scan_reverse(a);
17 // CHECK: %[[call:.*]] = call i32 @llvm.ctlz.i32(i32 %{{.*}}, i1 true)
18 // CHECK: %[[sub:.*]] = sub nsw i32 31, %[[call]]
19 // CHECK: ret i32 %[[sub]]
20 }
21
test__bsfd(int X)22 int test__bsfd(int X) {
23 // CHECK: @test__bsfd
24 // CHECK: %[[call:.*]] = call i32 @llvm.cttz.i32(i32 %{{.*}}, i1 true)
25 return __bsfd(X);
26 }
27
test__bsfq(long long X)28 int test__bsfq(long long X) {
29 // CHECK: @test__bsfq
30 // CHECK: %[[call:.*]] = call i64 @llvm.cttz.i64(i64 %{{.*}}, i1 true)
31 return __bsfq(X);
32 }
33
test__bsrd(int X)34 int test__bsrd(int X) {
35 // CHECK: @test__bsrd
36 // CHECK: %[[call:.*]] = call i32 @llvm.ctlz.i32(i32 %{{.*}}, i1 true)
37 // CHECK: %[[sub:.*]] = sub nsw i32 31, %[[call]]
38 return __bsrd(X);
39 }
40
test__bsrq(long long X)41 int test__bsrq(long long X) {
42 // CHECK: @test__bsrq
43 // CHECK: %[[call:.*]] = call i64 @llvm.ctlz.i64(i64 %{{.*}}, i1 true)
44 // CHECK: %[[cast:.*]] = trunc i64 %[[call]] to i32
45 // CHECK: %[[sub:.*]] = sub nsw i32 63, %[[cast]]
46 return __bsrq(X);
47 }
48