064f00061b
Summary: The _bit_scan_forward and _bit_scan_reverse intrinsics were accidentally masked under the preprocessor checks that prune intrinsics definitions for the benefit of faster compile-time on Windows. This patch moves the definitons out of that region. Fixes pr33722 Reviewers: craig.topper, aaboud, thakis Reviewed By: craig.topper Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D35184 llvm-svn: 307524
21 lines
623 B
C
21 lines
623 B
C
// RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
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// PR33722
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// RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -D_MSC_VER -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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