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InstrProf: Increment the profile counter for all types of destructor 

-fprofile-instr-generate does not emit counter increment intrinsics
for Dtor_Deleting and Dtor_Complete destructors with assigned
counters. This causes unnecessary [-Wprofile-instr-out-of-date]
warnings during profile-use runs even if the source has never been
modified since profile collection.

Patch by Betul Buyukkurt. Thanks!

llvm-svn: 237804
This commit is contained in:
Justin Bogner 2015-05-20 16:16:23 +00:00
parent fd27a1dc1b
commit fb29822bf4
2 changed files with 34 additions and 4 deletions
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8
clang/lib/CodeGen/CGClass.cpp
View File

@ -1366,6 +1366,10 @@ void CodeGenFunction::EmitDestructorBody(FunctionArgList &Args) {
const CXXDestructorDecl *Dtor = cast<CXXDestructorDecl>(CurGD.getDecl());
CXXDtorType DtorType = CurGD.getDtorType();
Stmt *Body = Dtor->getBody();
if (Body)
incrementProfileCounter(Body);
// The call to operator delete in a deleting destructor happens
// outside of the function-try-block, which means it's always
// possible to delegate the destructor body to the complete
@ -1378,8 +1382,6 @@ void CodeGenFunction::EmitDestructorBody(FunctionArgList &Args) {
return;
}
Stmt *Body = Dtor->getBody();
// If the body is a function-try-block, enter the try before
// anything else.
bool isTryBody = (Body && isa<CXXTryStmt>(Body));
@ -1418,8 +1420,6 @@ void CodeGenFunction::EmitDestructorBody(FunctionArgList &Args) {
case Dtor_Base:
assert(Body);
incrementProfileCounter(Body);
// Enter the cleanup scopes for fields and non-virtual bases.
EnterDtorCleanups(Dtor, Dtor_Base);

30
clang/test/Profile/cxx-virtual-destructor-calls.cpp Normal file
View File

@ -0,0 +1,30 @@
// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -main-file-name cxx-virtual-destructor-calls.cpp %s -o - -fprofile-instr-generate | FileCheck %s
struct Member {
~Member();
};
struct A {
virtual ~A();
};
struct B : A {
Member m;
virtual ~B();
};
// Complete dtor
// CHECK: @__llvm_profile_name__ZN1BD1Ev = private constant [9 x i8] c"_ZN1BD1Ev", section "__DATA,__llvm_prf_names", align 1
// Deleting dtor
// CHECK: @__llvm_profile_name__ZN1BD0Ev = private constant [9 x i8] c"_ZN1BD0Ev", section "__DATA,__llvm_prf_names", align 1
// Complete dtor counters and profile data
// CHECK: @__llvm_profile_counters__ZN1BD1Ev = private global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_data__ZN1BD1Ev =
// Deleting dtor counters and profile data
// CHECK: @__llvm_profile_counters__ZN1BD0Ev = private global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
// CHECK: @__llvm_profile_data__ZN1BD0Ev =
B::~B() { }