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rnkrnk
committedFeb 26, 2019
[MS] Don't emit coverage for deleting dtors
Summary: The MS C++ ABI has no constructor variants, but it has destructor variants, so we should move the deleting destructor variant check outside the check for "does the ABI have constructor variants". Fixes PR37561, so basic code coverage works on Windows with C++. Reviewers: vsk Subscribers: jdoerfert, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D58691 llvm-svn: 354924
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‎clang/lib/CodeGen/CodeGenPGO.cpp

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Original file line numberDiff line numberDiff line change
@@ -771,14 +771,14 @@ void CodeGenPGO::assignRegionCounters(GlobalDecl GD, llvm::Function *Fn) {
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// If so, instrument only base variant, others are implemented by delegation
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// to the base one, it would be counted twice otherwise.
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if (CGM.getTarget().getCXXABI().hasConstructorVariants()) {
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if (isa<CXXDestructorDecl>(D) && GD.getDtorType() != Dtor_Base)
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return;
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if (const auto *CCD = dyn_cast<CXXConstructorDecl>(D))
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if (GD.getCtorType() != Ctor_Base &&
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CodeGenFunction::IsConstructorDelegationValid(CCD))
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return;
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}
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if (isa<CXXDestructorDecl>(D) && GD.getDtorType() != Dtor_Base)
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return;
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CGM.ClearUnusedCoverageMapping(D);
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setFuncName(Fn);
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‎clang/test/Profile/cxx-abc-deleting-dtor.cpp

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@@ -0,0 +1,83 @@
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// RUN: %clang_cc1 -emit-llvm %s -std=c++11 -o - -fno-rtti \
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// RUN: -fprofile-instrument=clang -fcoverage-mapping -disable-llvm-passes \
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// RUN: -triple=x86_64-windows-msvc | FileCheck %s --check-prefix=MSVC
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// RUN: %clang_cc1 -emit-llvm %s -std=c++11 -o - -fno-rtti \
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// RUN: -fprofile-instrument=clang -fcoverage-mapping -disable-llvm-passes \
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// RUN: -triple=x86_64-linux-gnu | FileCheck %s --check-prefix=LINUX
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// Check that clang doesn't emit counters or __profn_ variables for deleting
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// destructor variants in both C++ ABIs.
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struct ABC {
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virtual ~ABC() = default;
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virtual void pure() = 0;
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};
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struct DerivedABC : ABC {
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~DerivedABC() override = default;
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void pure() override {}
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};
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DerivedABC *useABCVTable() { return new DerivedABC(); }
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// MSVC-NOT: @"__profn_??_G{{.*}}" =
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// MSVC: @"__profn_??1DerivedABC@@{{.*}}" =
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// MSVC-NOT: @"__profn_??_G{{.*}}" =
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// MSVC: @"__profn_??1ABC@@{{.*}}" =
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// MSVC-NOT: @"__profn_??_G{{.*}}" =
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// MSVC-LABEL: define linkonce_odr dso_local i8* @"??_GDerivedABC@@UEAAPEAXI@Z"(%struct.DerivedABC* %this, {{.*}})
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// MSVC-NOT: call void @llvm.instrprof.increment({{.*}})
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// MSVC: call void @"??1DerivedABC@@UEAA@XZ"({{.*}})
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// MSVC: ret void
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// MSVC-LABEL: define linkonce_odr dso_local i8* @"??_GABC@@UEAAPEAXI@Z"(%struct.ABC* %this, {{.*}})
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// MSVC-NOT: call void @llvm.instrprof.increment({{.*}})
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// MSVC: call void @llvm.trap()
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// MSVC-NEXT: unreachable
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// MSVC-LABEL: define linkonce_odr dso_local void @"??1DerivedABC@@UEAA@XZ"({{.*}})
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// MSVC: call void @llvm.instrprof.increment({{.*}})
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// MSVC: call void @"??1ABC@@UEAA@XZ"({{.*}})
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// MSVC: ret void
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// MSVC-LABEL: define linkonce_odr dso_local void @"??1ABC@@UEAA@XZ"({{.*}})
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// MSVC: call void @llvm.instrprof.increment({{.*}})
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// MSVC: ret void
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// D2 is the base, D1 and D0 are deleting and complete dtors.
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// LINUX-NOT: @__profn_{{.*D[01]Ev}} =
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// LINUX: @__profn__ZN10DerivedABCD2Ev =
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// LINUX-NOT: @__profn_{{.*D[01]Ev}} =
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// LINUX: @__profn__ZN3ABCD2Ev =
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// LINUX-NOT: @__profn_{{.*D[01]Ev}} =
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// LINUX-LABEL: define linkonce_odr void @_ZN10DerivedABCD1Ev(%struct.DerivedABC* %this)
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// LINUX-NOT: call void @llvm.instrprof.increment({{.*}})
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// LINUX: call void @_ZN10DerivedABCD2Ev({{.*}})
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// LINUX: ret void
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// LINUX-LABEL: define linkonce_odr void @_ZN10DerivedABCD0Ev(%struct.DerivedABC* %this)
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// LINUX-NOT: call void @llvm.instrprof.increment({{.*}})
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// LINUX: call void @_ZN10DerivedABCD1Ev({{.*}})
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// LINUX: call void @_ZdlPv({{.*}})
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// LINUX: ret void
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// LINUX-LABEL: define linkonce_odr void @_ZN3ABCD1Ev(%struct.ABC* %this)
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// LINUX-NOT: call void @llvm.instrprof.increment({{.*}})
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// LINUX: call void @llvm.trap()
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// LINUX-NEXT: unreachable
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// LINUX-LABEL: define linkonce_odr void @_ZN3ABCD0Ev(%struct.ABC* %this)
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// LINUX-NOT: call void @llvm.instrprof.increment({{.*}})
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// LINUX: call void @llvm.trap()
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// LINUX-NEXT: unreachable
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// LINUX-LABEL: define linkonce_odr void @_ZN10DerivedABCD2Ev(%struct.DerivedABC* %this)
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// LINUX: call void @llvm.instrprof.increment({{.*}})
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// LINUX: call void @_ZN3ABCD2Ev({{.*}})
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// LINUX: ret void
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// LINUX-LABEL: define linkonce_odr void @_ZN3ABCD2Ev(%struct.ABC* %this)
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// LINUX: call void @llvm.instrprof.increment({{.*}})
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// LINUX: ret void

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