forked from OSchip/llvm-project
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s -O0 | FileCheck %s --check-prefix=CHECK_O0
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int x;
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int y(void);
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void foo();
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void FUNC() {
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// CHECK-LABEL: define void @FUNC()
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// CHECK: [[call:%.*]] = call i32 @y
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// CHECK_O0: [[call:%.*]] = call i32 @y
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// CHECK_O0-NOT: call i64 @llvm.expect
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if (__builtin_expect (x, y()))
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foo ();
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}
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// rdar://9330105
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void isigprocmask(void);
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long bar();
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int main() {
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(void) __builtin_expect((isigprocmask(), 0), bar());
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}
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// CHECK-LABEL: define i32 @main()
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// CHECK: call void @isigprocmask()
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// CHECK: [[C:%.*]] = call i64 (...) @bar()
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// CHECK_O0: call void @isigprocmask()
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// CHECK_O0: [[C:%.*]] = call i64 (...) @bar()
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// CHECK_O0-NOT: call i64 @llvm.expect
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// CHECK-LABEL: define i32 @test1
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int test1(int x) {
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// CHECK_O0-NOT: call i64 @llvm.expect
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if (__builtin_expect (x, 1))
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return 0;
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return x;
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}
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// CHECK: define i32 @test2
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int test2(int x) {
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// CHECK_O0-NOT: call i64 @llvm.expect
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switch(__builtin_expect(x, 5)) {
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default:
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return 0;
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case 0:
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case 1:
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case 2:
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return 1;
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case 5:
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return 5;
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};
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return 0;
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}
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