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Revert "Revert "CodeGen: ensure placeholder instruction for cleanup is created"" 

This reverts commit fd1274fa78cb0fd32cc1fa2e6f5bb8e62d29df19.

Add an explicit triple for the test which is pattern matching overly
aggressively.

llvm-svn: 367055
This commit is contained in:
Saleem Abdulrasool 2019-07-25 20:59:48 +00:00
parent 2fa67f442a
commit 3bdb7a9044
2 changed files with 66 additions and 8 deletions
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19
clang/lib/CodeGen/CGExprAgg.cpp
View File

@ -1495,6 +1495,13 @@ void AggExprEmitter::VisitInitListExpr(InitListExpr *E) {
// initializers throws an exception.
SmallVector<EHScopeStack::stable_iterator, 16> cleanups;
llvm::Instruction *cleanupDominator = nullptr;
auto addCleanup = [&](const EHScopeStack::stable_iterator &cleanup) {
cleanups.push_back(cleanup);
if (!cleanupDominator) // create placeholder once needed
cleanupDominator = CGF.Builder.CreateAlignedLoad(
CGF.Int8Ty, llvm::Constant::getNullValue(CGF.Int8PtrTy),
CharUnits::One());
};
unsigned curInitIndex = 0;
@ -1519,7 +1526,7 @@ void AggExprEmitter::VisitInitListExpr(InitListExpr *E) {
if (QualType::DestructionKind dtorKind =
Base.getType().isDestructedType()) {
CGF.pushDestroy(dtorKind, V, Base.getType());
cleanups.push_back(CGF.EHStack.stable_begin());
addCleanup(CGF.EHStack.stable_begin());
}
}
}
@ -1596,15 +1603,9 @@ void AggExprEmitter::VisitInitListExpr(InitListExpr *E) {
= field->getType().isDestructedType()) {
assert(LV.isSimple());
if (CGF.needsEHCleanup(dtorKind)) {
if (!cleanupDominator)
cleanupDominator = CGF.Builder.CreateAlignedLoad(
CGF.Int8Ty,
llvm::Constant::getNullValue(CGF.Int8PtrTy),
CharUnits::One()); // placeholder
CGF.pushDestroy(EHCleanup, LV.getAddress(), field->getType(),
CGF.getDestroyer(dtorKind), false);
cleanups.push_back(CGF.EHStack.stable_begin());
addCleanup(CGF.EHStack.stable_begin());
pushedCleanup = true;
}
}
@ -1620,6 +1621,8 @@ void AggExprEmitter::VisitInitListExpr(InitListExpr *E) {
// Deactivate all the partial cleanups in reverse order, which
// generally means popping them.
assert((cleanupDominator || cleanups.empty()) &&
"Missing cleanupDominator before deactivating cleanup blocks");
for (unsigned i = cleanups.size(); i != 0; --i)
CGF.DeactivateCleanupBlock(cleanups[i-1], cleanupDominator);

55
clang/test/CodeGenCXX/pr40771-ctad-with-lambda-copy-capture.cpp Normal file
View File

@ -0,0 +1,55 @@
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm --std=c++17 -fcxx-exceptions -fexceptions -discard-value-names %s -o - | FileCheck %s
struct Q { Q(); };
struct R { R(Q); ~R(); };
struct S { S(Q); ~S(); };
struct T : R, S {};
Q q;
T t { R{q}, S{q} };
// CHECK-LABEL: define internal void @__cxx_global_var_init.1() {{.*}} {
// CHECK-NEXT: [[TMP_R:%[a-z0-9.]+]] = alloca %struct.R, align 1
// CHECK-NEXT: [[TMP_Q1:%[a-z0-9.]+]] = alloca %struct.Q, align 1
// CHECK-NEXT: [[TMP_S:%[a-z0-9.]+]] = alloca %struct.S, align 1
// CHECK-NEXT: [[TMP_Q2:%[a-z0-9.]+]] = alloca %struct.Q, align 1
// CHECK-NEXT: [[XPT:%[a-z0-9.]+]] = alloca i8*
// CHECK-NEXT: [[SLOT:%[a-z0-9.]+]] = alloca i32
// CHECK-NEXT: [[ACTIVE:%[a-z0-9.]+]] = alloca i1, align 1
// CHECK-NEXT: call void @_ZN1RC1E1Q(%struct.R* [[TMP_R]])
// CHECK-NEXT: store i1 true, i1* [[ACTIVE]], align 1
// CHECK-NEXT: invoke void @_ZN1SC1E1Q(%struct.S* [[TMP_S]])
// CHECK-NEXT: to label %[[L1:[a-z0-9.]+]] unwind label %[[L2:[a-z0-9.]+]]
// CHECK-EMPTY:
// CHECK-NEXT: [[L1]]:
// CHECK-NEXT: store i1 false, i1* [[ACTIVE]], align 1
// CHECK-NEXT: call void @_ZN1SD1Ev(%struct.S*
// CHECK-NEXT: call void @_ZN1RD1Ev(%struct.R*
// CHECK-NEXT: [[EXIT:%[a-z0-9.]+]] = call i32 @__cxa_atexit(
// CHECK-NEXT: ret void
// CHECK-EMPTY:
// CHECK-NEXT: [[L2]]:
// CHECK-NEXT: [[LP:%[a-z0-9.]+]] = landingpad { i8*, i32 }
// CHECK-NEXT: cleanup
// CHECK-NEXT: [[X1:%[a-z0-9.]+]] = extractvalue { i8*, i32 } [[LP]], 0
// CHECK-NEXT: store i8* [[X1]], i8** [[XPT]], align 8
// CHECK-NEXT: [[X2:%[a-z0-9.]+]] = extractvalue { i8*, i32 } [[LP]], 1
// CHECK-NEXT: store i32 [[X2]], i32* [[SLOT]], align 4
// CHECK-NEXT: [[IS_ACT:%[a-z0-9.]+]] = load i1, i1* [[ACTIVE]], align 1
// CHECK-NEXT: br i1 [[IS_ACT]], label %[[L3:[a-z0-9.]+]], label %[[L4:[a-z0-9.]+]]
// CHECK-EMPTY:
// CHECK-NEXT: [[L3]]:
// CHECK-NEXT: call void @_ZN1RD1Ev(%struct.R*
// CHECK-NEXT: br label %[[L4]]
// CHECK-EMPTY:
// CHECK-NEXT: [[L4]]:
// CHECK-NEXT: call void @_ZN1RD1Ev(%struct.R* [[TMP_R]])
// CHECK-NEXT: br label %[[L5:[a-z0-9.]+]]
// CHECK-EMPTY:
// CHECK-NEXT: [[L5]]:
// CHECK-NEXT: [[EXN:%[a-z0-9.]+]] = load i8*, i8** [[XPT]], align 8
// CHECK-NEXT: [[SEL:%[a-z0-9.]+]] = load i32, i32* [[SLOT]], align 4
// CHECK-NEXT: [[LV1:%[a-z0-9.]+]] = insertvalue { i8*, i32 } undef, i8* [[EXN]], 0
// CHECK-NEXT: [[LV2:%[a-z0-9.]+]] = insertvalue { i8*, i32 } [[LV1]], i32 [[SEL]], 1
// CHECK-NEXT: resume { i8*, i32 } [[LV2]]
// CHECK-NEXT: }