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-rw-r--r--lib/CodeGen/CGExprCXX.cpp284
1 files changed, 180 insertions, 104 deletions
diff --git a/lib/CodeGen/CGExprCXX.cpp b/lib/CodeGen/CGExprCXX.cpp
index 4396f567f2f9..78db5903de54 100644
--- a/lib/CodeGen/CGExprCXX.cpp
+++ b/lib/CodeGen/CGExprCXX.cpp
@@ -13,6 +13,7 @@
#include "clang/Frontend/CodeGenOptions.h"
#include "CodeGenFunction.h"
+#include "CGCUDARuntime.h"
#include "CGCXXABI.h"
#include "CGObjCRuntime.h"
#include "CGDebugInfo.h"
@@ -206,16 +207,17 @@ RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE,
cast<CXXConstructorDecl>(MD)->isDefaultConstructor())
return RValue::get(0);
- if (MD->isCopyAssignmentOperator()) {
- // We don't like to generate the trivial copy assignment operator when
- // it isn't necessary; just produce the proper effect here.
+ if (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) {
+ // We don't like to generate the trivial copy/move assignment operator
+ // when it isn't necessary; just produce the proper effect here.
llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress();
EmitAggregateCopy(This, RHS, CE->getType());
return RValue::get(This);
}
if (isa<CXXConstructorDecl>(MD) &&
- cast<CXXConstructorDecl>(MD)->isCopyConstructor()) {
+ cast<CXXConstructorDecl>(MD)->isCopyOrMoveConstructor()) {
+ // Trivial move and copy ctor are the same.
llvm::Value *RHS = EmitLValue(*CE->arg_begin()).getAddress();
EmitSynthesizedCXXCopyCtorCall(cast<CXXConstructorDecl>(MD), This, RHS,
CE->arg_begin(), CE->arg_end());
@@ -236,7 +238,7 @@ RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE,
FInfo = &CGM.getTypes().getFunctionInfo(MD);
const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>();
- const llvm::Type *Ty
+ llvm::Type *Ty
= CGM.getTypes().GetFunctionType(*FInfo, FPT->isVariadic());
// C++ [class.virtual]p12:
@@ -333,16 +335,12 @@ CodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
LValue LV = EmitLValue(E->getArg(0));
llvm::Value *This = LV.getAddress();
- if (MD->isCopyAssignmentOperator()) {
- const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(MD->getDeclContext());
- if (ClassDecl->hasTrivialCopyAssignment()) {
- assert(!ClassDecl->hasUserDeclaredCopyAssignment() &&
- "EmitCXXOperatorMemberCallExpr - user declared copy assignment");
- llvm::Value *Src = EmitLValue(E->getArg(1)).getAddress();
- QualType Ty = E->getType();
- EmitAggregateCopy(This, Src, Ty);
- return RValue::get(This);
- }
+ if ((MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) &&
+ MD->isTrivial()) {
+ llvm::Value *Src = EmitLValue(E->getArg(1)).getAddress();
+ QualType Ty = E->getType();
+ EmitAggregateCopy(This, Src, Ty);
+ return RValue::get(This);
}
llvm::Value *Callee = EmitCXXOperatorMemberCallee(E, MD, This);
@@ -350,6 +348,54 @@ CodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
E->arg_begin() + 1, E->arg_end());
}
+RValue CodeGenFunction::EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E,
+ ReturnValueSlot ReturnValue) {
+ return CGM.getCUDARuntime().EmitCUDAKernelCallExpr(*this, E, ReturnValue);
+}
+
+static void EmitNullBaseClassInitialization(CodeGenFunction &CGF,
+ llvm::Value *DestPtr,
+ const CXXRecordDecl *Base) {
+ if (Base->isEmpty())
+ return;
+
+ DestPtr = CGF.EmitCastToVoidPtr(DestPtr);
+
+ const ASTRecordLayout &Layout = CGF.getContext().getASTRecordLayout(Base);
+ CharUnits Size = Layout.getNonVirtualSize();
+ CharUnits Align = Layout.getNonVirtualAlign();
+
+ llvm::Value *SizeVal = CGF.CGM.getSize(Size);
+
+ // If the type contains a pointer to data member we can't memset it to zero.
+ // Instead, create a null constant and copy it to the destination.
+ // TODO: there are other patterns besides zero that we can usefully memset,
+ // like -1, which happens to be the pattern used by member-pointers.
+ // TODO: isZeroInitializable can be over-conservative in the case where a
+ // virtual base contains a member pointer.
+ if (!CGF.CGM.getTypes().isZeroInitializable(Base)) {
+ llvm::Constant *NullConstant = CGF.CGM.EmitNullConstantForBase(Base);
+
+ llvm::GlobalVariable *NullVariable =
+ new llvm::GlobalVariable(CGF.CGM.getModule(), NullConstant->getType(),
+ /*isConstant=*/true,
+ llvm::GlobalVariable::PrivateLinkage,
+ NullConstant, Twine());
+ NullVariable->setAlignment(Align.getQuantity());
+ llvm::Value *SrcPtr = CGF.EmitCastToVoidPtr(NullVariable);
+
+ // Get and call the appropriate llvm.memcpy overload.
+ CGF.Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, Align.getQuantity());
+ return;
+ }
+
+ // Otherwise, just memset the whole thing to zero. This is legal
+ // because in LLVM, all default initializers (other than the ones we just
+ // handled above) are guaranteed to have a bit pattern of all zeros.
+ CGF.Builder.CreateMemSet(DestPtr, CGF.Builder.getInt8(0), SizeVal,
+ Align.getQuantity());
+}
+
void
CodeGenFunction::EmitCXXConstructExpr(const CXXConstructExpr *E,
AggValueSlot Dest) {
@@ -360,8 +406,19 @@ CodeGenFunction::EmitCXXConstructExpr(const CXXConstructExpr *E,
// constructor, as can be the case with a non-user-provided default
// constructor, emit the zero initialization now, unless destination is
// already zeroed.
- if (E->requiresZeroInitialization() && !Dest.isZeroed())
- EmitNullInitialization(Dest.getAddr(), E->getType());
+ if (E->requiresZeroInitialization() && !Dest.isZeroed()) {
+ switch (E->getConstructionKind()) {
+ case CXXConstructExpr::CK_Delegating:
+ assert(0 && "Delegating constructor should not need zeroing");
+ case CXXConstructExpr::CK_Complete:
+ EmitNullInitialization(Dest.getAddr(), E->getType());
+ break;
+ case CXXConstructExpr::CK_VirtualBase:
+ case CXXConstructExpr::CK_NonVirtualBase:
+ EmitNullBaseClassInitialization(*this, Dest.getAddr(), CD->getParent());
+ break;
+ }
+ }
// If this is a call to a trivial default constructor, do nothing.
if (CD->isTrivial() && CD->isDefaultConstructor())
@@ -483,7 +540,7 @@ static llvm::Value *EmitCXXNewAllocSize(CodeGenFunction &CGF,
// the cookie size would bring the total size >= 0.
bool isSigned
= e->getArraySize()->getType()->isSignedIntegerOrEnumerationType();
- const llvm::IntegerType *numElementsType
+ llvm::IntegerType *numElementsType
= cast<llvm::IntegerType>(numElements->getType());
unsigned numElementsWidth = numElementsType->getBitWidth();
@@ -703,63 +760,85 @@ static void StoreAnyExprIntoOneUnit(CodeGenFunction &CGF, const CXXNewExpr *E,
AllocType.isVolatileQualified());
else {
AggValueSlot Slot
- = AggValueSlot::forAddr(NewPtr, AllocType.getQualifiers(), true);
+ = AggValueSlot::forAddr(NewPtr, AllocType.getQualifiers(),
+ AggValueSlot::IsDestructed,
+ AggValueSlot::DoesNotNeedGCBarriers,
+ AggValueSlot::IsNotAliased);
CGF.EmitAggExpr(Init, Slot);
}
}
void
CodeGenFunction::EmitNewArrayInitializer(const CXXNewExpr *E,
- llvm::Value *NewPtr,
- llvm::Value *NumElements) {
+ QualType elementType,
+ llvm::Value *beginPtr,
+ llvm::Value *numElements) {
// We have a POD type.
if (E->getNumConstructorArgs() == 0)
return;
-
- const llvm::Type *SizeTy = ConvertType(getContext().getSizeType());
-
- // Create a temporary for the loop index and initialize it with 0.
- llvm::Value *IndexPtr = CreateTempAlloca(SizeTy, "loop.index");
- llvm::Value *Zero = llvm::Constant::getNullValue(SizeTy);
- Builder.CreateStore(Zero, IndexPtr);
-
- // Start the loop with a block that tests the condition.
- llvm::BasicBlock *CondBlock = createBasicBlock("for.cond");
- llvm::BasicBlock *AfterFor = createBasicBlock("for.end");
-
- EmitBlock(CondBlock);
-
- llvm::BasicBlock *ForBody = createBasicBlock("for.body");
-
- // Generate: if (loop-index < number-of-elements fall to the loop body,
- // otherwise, go to the block after the for-loop.
- llvm::Value *Counter = Builder.CreateLoad(IndexPtr);
- llvm::Value *IsLess = Builder.CreateICmpULT(Counter, NumElements, "isless");
- // If the condition is true, execute the body.
- Builder.CreateCondBr(IsLess, ForBody, AfterFor);
-
- EmitBlock(ForBody);
-
- llvm::BasicBlock *ContinueBlock = createBasicBlock("for.inc");
- // Inside the loop body, emit the constructor call on the array element.
- Counter = Builder.CreateLoad(IndexPtr);
- llvm::Value *Address = Builder.CreateInBoundsGEP(NewPtr, Counter,
- "arrayidx");
- StoreAnyExprIntoOneUnit(*this, E, Address);
-
- EmitBlock(ContinueBlock);
-
- // Emit the increment of the loop counter.
- llvm::Value *NextVal = llvm::ConstantInt::get(SizeTy, 1);
- Counter = Builder.CreateLoad(IndexPtr);
- NextVal = Builder.CreateAdd(Counter, NextVal, "inc");
- Builder.CreateStore(NextVal, IndexPtr);
-
- // Finally, branch back up to the condition for the next iteration.
- EmitBranch(CondBlock);
-
- // Emit the fall-through block.
- EmitBlock(AfterFor, true);
+
+ // Check if the number of elements is constant.
+ bool checkZero = true;
+ if (llvm::ConstantInt *constNum = dyn_cast<llvm::ConstantInt>(numElements)) {
+ // If it's constant zero, skip the whole loop.
+ if (constNum->isZero()) return;
+
+ checkZero = false;
+ }
+
+ // Find the end of the array, hoisted out of the loop.
+ llvm::Value *endPtr =
+ Builder.CreateInBoundsGEP(beginPtr, numElements, "array.end");
+
+ // Create the continuation block.
+ llvm::BasicBlock *contBB = createBasicBlock("new.loop.end");
+
+ // If we need to check for zero, do so now.
+ if (checkZero) {
+ llvm::BasicBlock *nonEmptyBB = createBasicBlock("new.loop.nonempty");
+ llvm::Value *isEmpty = Builder.CreateICmpEQ(beginPtr, endPtr,
+ "array.isempty");
+ Builder.CreateCondBr(isEmpty, contBB, nonEmptyBB);
+ EmitBlock(nonEmptyBB);
+ }
+
+ // Enter the loop.
+ llvm::BasicBlock *entryBB = Builder.GetInsertBlock();
+ llvm::BasicBlock *loopBB = createBasicBlock("new.loop");
+
+ EmitBlock(loopBB);
+
+ // Set up the current-element phi.
+ llvm::PHINode *curPtr =
+ Builder.CreatePHI(beginPtr->getType(), 2, "array.cur");
+ curPtr->addIncoming(beginPtr, entryBB);
+
+ // Enter a partial-destruction cleanup if necessary.
+ QualType::DestructionKind dtorKind = elementType.isDestructedType();
+ EHScopeStack::stable_iterator cleanup;
+ if (needsEHCleanup(dtorKind)) {
+ pushRegularPartialArrayCleanup(beginPtr, curPtr, elementType,
+ getDestroyer(dtorKind));
+ cleanup = EHStack.stable_begin();
+ }
+
+ // Emit the initializer into this element.
+ StoreAnyExprIntoOneUnit(*this, E, curPtr);
+
+ // Leave the cleanup if we entered one.
+ if (cleanup != EHStack.stable_end())
+ DeactivateCleanupBlock(cleanup);
+
+ // Advance to the next element.
+ llvm::Value *nextPtr = Builder.CreateConstGEP1_32(curPtr, 1, "array.next");
+
+ // Check whether we've gotten to the end of the array and, if so,
+ // exit the loop.
+ llvm::Value *isEnd = Builder.CreateICmpEQ(nextPtr, endPtr, "array.atend");
+ Builder.CreateCondBr(isEnd, contBB, loopBB);
+ curPtr->addIncoming(nextPtr, Builder.GetInsertBlock());
+
+ EmitBlock(contBB);
}
static void EmitZeroMemSet(CodeGenFunction &CGF, QualType T,
@@ -771,6 +850,7 @@ static void EmitZeroMemSet(CodeGenFunction &CGF, QualType T,
}
static void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E,
+ QualType ElementType,
llvm::Value *NewPtr,
llvm::Value *NumElements,
llvm::Value *AllocSizeWithoutCookie) {
@@ -783,11 +863,10 @@ static void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E,
if (!E->hasInitializer() || Ctor->getParent()->isEmpty())
return;
- if (CGF.CGM.getTypes().isZeroInitializable(E->getAllocatedType())) {
+ if (CGF.CGM.getTypes().isZeroInitializable(ElementType)) {
// Optimization: since zero initialization will just set the memory
// to all zeroes, generate a single memset to do it in one shot.
- EmitZeroMemSet(CGF, E->getAllocatedType(), NewPtr,
- AllocSizeWithoutCookie);
+ EmitZeroMemSet(CGF, ElementType, NewPtr, AllocSizeWithoutCookie);
return;
}
@@ -803,11 +882,10 @@ static void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E,
isa<ImplicitValueInitExpr>(E->getConstructorArg(0))) {
// Optimization: since zero initialization will just set the memory
// to all zeroes, generate a single memset to do it in one shot.
- EmitZeroMemSet(CGF, E->getAllocatedType(), NewPtr,
- AllocSizeWithoutCookie);
- return;
+ EmitZeroMemSet(CGF, ElementType, NewPtr, AllocSizeWithoutCookie);
+ return;
} else {
- CGF.EmitNewArrayInitializer(E, NewPtr, NumElements);
+ CGF.EmitNewArrayInitializer(E, ElementType, NewPtr, NumElements);
return;
}
}
@@ -819,7 +897,7 @@ static void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E,
if (E->hasInitializer() &&
!Ctor->getParent()->hasUserDeclaredConstructor() &&
!Ctor->getParent()->isEmpty())
- CGF.EmitNullInitialization(NewPtr, E->getAllocatedType());
+ CGF.EmitNullInitialization(NewPtr, ElementType);
CGF.EmitCXXConstructorCall(Ctor, Ctor_Complete, /*ForVirtualBase=*/false,
NewPtr, E->constructor_arg_begin(),
@@ -1086,15 +1164,6 @@ llvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) {
Builder.CreateCondBr(isNull, contBB, notNullBB);
EmitBlock(notNullBB);
}
-
- assert((allocSize == allocSizeWithoutCookie) ==
- CalculateCookiePadding(*this, E).isZero());
- if (allocSize != allocSizeWithoutCookie) {
- assert(E->isArray());
- allocation = CGM.getCXXABI().InitializeArrayCookie(*this, allocation,
- numElements,
- E, allocType);
- }
// If there's an operator delete, enter a cleanup to call it if an
// exception is thrown.
@@ -1105,21 +1174,28 @@ llvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) {
operatorDeleteCleanup = EHStack.stable_begin();
}
- const llvm::Type *elementPtrTy
+ assert((allocSize == allocSizeWithoutCookie) ==
+ CalculateCookiePadding(*this, E).isZero());
+ if (allocSize != allocSizeWithoutCookie) {
+ assert(E->isArray());
+ allocation = CGM.getCXXABI().InitializeArrayCookie(*this, allocation,
+ numElements,
+ E, allocType);
+ }
+
+ llvm::Type *elementPtrTy
= ConvertTypeForMem(allocType)->getPointerTo(AS);
llvm::Value *result = Builder.CreateBitCast(allocation, elementPtrTy);
+ EmitNewInitializer(*this, E, allocType, result, numElements,
+ allocSizeWithoutCookie);
if (E->isArray()) {
- EmitNewInitializer(*this, E, result, numElements, allocSizeWithoutCookie);
-
// NewPtr is a pointer to the base element type. If we're
// allocating an array of arrays, we'll need to cast back to the
// array pointer type.
- const llvm::Type *resultType = ConvertTypeForMem(E->getType());
+ llvm::Type *resultType = ConvertTypeForMem(E->getType());
if (result->getType() != resultType)
result = Builder.CreateBitCast(result, resultType);
- } else {
- EmitNewInitializer(*this, E, result, numElements, allocSizeWithoutCookie);
}
// Deactivate the 'operator delete' cleanup if we finished
@@ -1206,7 +1282,7 @@ static void EmitObjectDelete(CodeGenFunction &CGF,
const CXXDestructorDecl *Dtor = 0;
if (const RecordType *RT = ElementType->getAs<RecordType>()) {
CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
- if (!RD->hasTrivialDestructor()) {
+ if (RD->hasDefinition() && !RD->hasTrivialDestructor()) {
Dtor = RD->getDestructor();
if (Dtor->isVirtual()) {
@@ -1218,7 +1294,7 @@ static void EmitObjectDelete(CodeGenFunction &CGF,
ElementType);
}
- const llvm::Type *Ty =
+ llvm::Type *Ty =
CGF.getTypes().GetFunctionType(CGF.getTypes().getFunctionInfo(Dtor,
Dtor_Complete),
/*isVariadic=*/false);
@@ -1307,7 +1383,7 @@ namespace {
// Pass the original requested size as the second argument.
if (DeleteFTy->getNumArgs() == 2) {
QualType size_t = DeleteFTy->getArgType(1);
- const llvm::IntegerType *SizeTy
+ llvm::IntegerType *SizeTy
= cast<llvm::IntegerType>(CGF.ConvertType(size_t));
CharUnits ElementTypeSize =
@@ -1406,7 +1482,7 @@ void CodeGenFunction::EmitCXXDeleteExpr(const CXXDeleteExpr *E) {
QualType DeleteTy = Arg->getType()->getAs<PointerType>()->getPointeeType();
if (DeleteTy->isConstantArrayType()) {
llvm::Value *Zero = Builder.getInt32(0);
- llvm::SmallVector<llvm::Value*,8> GEP;
+ SmallVector<llvm::Value*,8> GEP;
GEP.push_back(Zero); // point at the outermost array
@@ -1420,7 +1496,7 @@ void CodeGenFunction::EmitCXXDeleteExpr(const CXXDeleteExpr *E) {
GEP.push_back(Zero);
}
- Ptr = Builder.CreateInBoundsGEP(Ptr, GEP.begin(), GEP.end(), "del.first");
+ Ptr = Builder.CreateInBoundsGEP(Ptr, GEP, "del.first");
}
assert(ConvertTypeForMem(DeleteTy) ==
@@ -1439,8 +1515,8 @@ void CodeGenFunction::EmitCXXDeleteExpr(const CXXDeleteExpr *E) {
static llvm::Constant *getBadTypeidFn(CodeGenFunction &CGF) {
// void __cxa_bad_typeid();
- const llvm::Type *VoidTy = llvm::Type::getVoidTy(CGF.getLLVMContext());
- const llvm::FunctionType *FTy =
+ llvm::Type *VoidTy = llvm::Type::getVoidTy(CGF.getLLVMContext());
+ llvm::FunctionType *FTy =
llvm::FunctionType::get(VoidTy, false);
return CGF.CGM.CreateRuntimeFunction(FTy, "__cxa_bad_typeid");
@@ -1454,7 +1530,7 @@ static void EmitBadTypeidCall(CodeGenFunction &CGF) {
static llvm::Value *EmitTypeidFromVTable(CodeGenFunction &CGF,
const Expr *E,
- const llvm::Type *StdTypeInfoPtrTy) {
+ llvm::Type *StdTypeInfoPtrTy) {
// Get the vtable pointer.
llvm::Value *ThisPtr = CGF.EmitLValue(E).getAddress();
@@ -1487,7 +1563,7 @@ static llvm::Value *EmitTypeidFromVTable(CodeGenFunction &CGF,
}
llvm::Value *CodeGenFunction::EmitCXXTypeidExpr(const CXXTypeidExpr *E) {
- const llvm::Type *StdTypeInfoPtrTy =
+ llvm::Type *StdTypeInfoPtrTy =
ConvertType(E->getType())->getPointerTo();
if (E->isTypeOperand()) {
@@ -1528,7 +1604,7 @@ static llvm::Constant *getDynamicCastFn(CodeGenFunction &CGF) {
llvm::Type *Args[4] = { Int8PtrTy, Int8PtrTy, Int8PtrTy, PtrDiffTy };
- const llvm::FunctionType *FTy =
+ llvm::FunctionType *FTy =
llvm::FunctionType::get(Int8PtrTy, Args, false);
return CGF.CGM.CreateRuntimeFunction(FTy, "__dynamic_cast");
@@ -1537,8 +1613,8 @@ static llvm::Constant *getDynamicCastFn(CodeGenFunction &CGF) {
static llvm::Constant *getBadCastFn(CodeGenFunction &CGF) {
// void __cxa_bad_cast();
- const llvm::Type *VoidTy = llvm::Type::getVoidTy(CGF.getLLVMContext());
- const llvm::FunctionType *FTy =
+ llvm::Type *VoidTy = llvm::Type::getVoidTy(CGF.getLLVMContext());
+ llvm::FunctionType *FTy =
llvm::FunctionType::get(VoidTy, false);
return CGF.CGM.CreateRuntimeFunction(FTy, "__cxa_bad_cast");
@@ -1554,9 +1630,9 @@ static llvm::Value *
EmitDynamicCastCall(CodeGenFunction &CGF, llvm::Value *Value,
QualType SrcTy, QualType DestTy,
llvm::BasicBlock *CastEnd) {
- const llvm::Type *PtrDiffLTy =
+ llvm::Type *PtrDiffLTy =
CGF.ConvertType(CGF.getContext().getPointerDiffType());
- const llvm::Type *DestLTy = CGF.ConvertType(DestTy);
+ llvm::Type *DestLTy = CGF.ConvertType(DestTy);
if (const PointerType *PTy = DestTy->getAs<PointerType>()) {
if (PTy->getPointeeType()->isVoidType()) {
@@ -1626,7 +1702,7 @@ EmitDynamicCastCall(CodeGenFunction &CGF, llvm::Value *Value,
static llvm::Value *EmitDynamicCastToNull(CodeGenFunction &CGF,
QualType DestTy) {
- const llvm::Type *DestLTy = CGF.ConvertType(DestTy);
+ llvm::Type *DestLTy = CGF.ConvertType(DestTy);
if (DestTy->isPointerType())
return llvm::Constant::getNullValue(DestLTy);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 08:59:02 +0000