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
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#include <immintrin.h>
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int test_bit_scan_forward(int a) {
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return _bit_scan_forward(a);
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// CHECK: @test_bit_scan_forward
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// CHECK: %[[call:.*]] = call i32 @llvm.cttz.i32(
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// CHECK: ret i32 %[[call]]
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}
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int test_bit_scan_reverse(int a) {
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return _bit_scan_reverse(a);
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// CHECK: %[[call:.*]] = call i32 @llvm.ctlz.i32(
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// CHECK: %[[sub:.*]] = sub nsw i32 31, %[[call]]
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// CHECK: ret i32 %[[sub]]
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}
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