57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -disable-llvm-passes -o - %s -O1 | FileCheck %s
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -disable-llvm-passes -o - -x c++ %s -O1 | 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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// When optimizing, the builtin should be converted to metadata.
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// When not optimizing, there should be no metadata created for the builtin.
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// In both cases, the builtin should be removed from the code.
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#ifdef __cplusplus
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extern "C" {
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#endif
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void foo();
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void branch(int x) {
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// CHECK-LABEL: define{{.*}} void @branch(
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// CHECK-NOT: builtin_unpredictable
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// CHECK: !unpredictable [[METADATA:.+]]
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// CHECK_O0-NOT: builtin_unpredictable
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// CHECK_O0-NOT: !unpredictable
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if (__builtin_unpredictable(x > 0))
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foo ();
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}
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int unpredictable_switch(int x) {
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// CHECK-LABEL: @unpredictable_switch(
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// CHECK-NOT: builtin_unpredictable
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// CHECK: !unpredictable [[METADATA:.+]]
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// CHECK_O0-NOT: builtin_unpredictable
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// CHECK_O0-NOT: !unpredictable
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switch(__builtin_unpredictable(x)) {
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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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#ifdef __cplusplus
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}
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#endif
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// CHECK: [[METADATA]] = !{}
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