forked from OSchip/llvm-project
33 lines
755 B
C++
33 lines
755 B
C++
// Test that clang doesn't emit llvm.expect when the counter is 0
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// RUN: llvm-profdata merge %S/Inputs/cxx-never-executed-branch.proftext -o %t.profdata
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// RUN: %clang_cc1 -std=c++20 %s -triple %itanium_abi_triple -O2 -o - -emit-llvm -fprofile-instrument-use-path=%t.profdata -disable-llvm-passes | FileCheck %s
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int rand();
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// CHECK: define {{.*}}@_Z13is_in_profilev
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// CHECK-NOT: call {{.*}}@llvm.expect
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int is_in_profile() {
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int rando = rand();
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int x = 0;
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if (rando == 0) [[likely]]
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x = 2;
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else
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x = 3;
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return x;
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}
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// CHECK: define {{.*}}@_Z17is_not_in_profilev
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// CHECK: call {{.*}}@llvm.expect
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int is_not_in_profile() {
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int rando = rand();
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int x = 0;
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if (rando == 0) [[likely]]
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x = 2;
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else
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x = 3;
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return x;
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}
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