Very basic irgen support for new expressions.
llvm-svn: 72672
This commit is contained in:
parent
0955f20473
commit
1832f52b10
|
@ -227,8 +227,78 @@ CodeGenFunction::EmitCXXExprWithTemporaries(const CXXExprWithTemporaries *E,
|
|||
}
|
||||
|
||||
llvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) {
|
||||
ErrorUnsupported(E, "new expression");
|
||||
return llvm::UndefValue::get(ConvertType(E->getType()));
|
||||
if (E->isArray()) {
|
||||
ErrorUnsupported(E, "new[] expression");
|
||||
return llvm::UndefValue::get(ConvertType(E->getType()));
|
||||
}
|
||||
|
||||
QualType AllocType = E->getAllocatedType();
|
||||
FunctionDecl *NewFD = E->getOperatorNew();
|
||||
const FunctionProtoType *NewFTy = NewFD->getType()->getAsFunctionProtoType();
|
||||
|
||||
CallArgList NewArgs;
|
||||
|
||||
// The allocation size is the first argument.
|
||||
QualType SizeTy = getContext().getSizeType();
|
||||
llvm::Value *AllocSize =
|
||||
llvm::ConstantInt::get(ConvertType(SizeTy),
|
||||
getContext().getTypeSize(AllocType) / 8);
|
||||
|
||||
NewArgs.push_back(std::make_pair(RValue::get(AllocSize), SizeTy));
|
||||
|
||||
// Emit the rest of the arguments.
|
||||
// FIXME: Ideally, this should just use EmitCallArgs.
|
||||
CXXNewExpr::const_arg_iterator NewArg = E->placement_arg_begin();
|
||||
|
||||
// First, use the types from the function type.
|
||||
// We start at 1 here because the first argument (the allocation size)
|
||||
// has already been emitted.
|
||||
for (unsigned i = 1, e = NewFTy->getNumArgs(); i != e; ++i, ++NewArg) {
|
||||
QualType ArgType = NewFTy->getArgType(i);
|
||||
|
||||
assert(getContext().getCanonicalType(ArgType.getNonReferenceType()).
|
||||
getTypePtr() ==
|
||||
getContext().getCanonicalType(NewArg->getType()).getTypePtr() &&
|
||||
"type mismatch in call argument!");
|
||||
|
||||
NewArgs.push_back(std::make_pair(EmitCallArg(*NewArg, ArgType),
|
||||
ArgType));
|
||||
|
||||
}
|
||||
|
||||
// Either we've emitted all the call args, or we have a call to a
|
||||
// variadic function.
|
||||
assert((NewArg == E->placement_arg_end() || NewFTy->isVariadic()) &&
|
||||
"Extra arguments in non-variadic function!");
|
||||
|
||||
// If we still have any arguments, emit them using the type of the argument.
|
||||
for (CXXNewExpr::const_arg_iterator NewArgEnd = E->placement_arg_end();
|
||||
NewArg != NewArgEnd; ++NewArg) {
|
||||
QualType ArgType = NewArg->getType();
|
||||
NewArgs.push_back(std::make_pair(EmitCallArg(*NewArg, ArgType),
|
||||
ArgType));
|
||||
}
|
||||
|
||||
// Emit the call to new.
|
||||
RValue RV =
|
||||
EmitCall(CGM.getTypes().getFunctionInfo(NewFTy->getResultType(), NewArgs),
|
||||
CGM.GetAddrOfFunction(GlobalDecl(NewFD)),
|
||||
NewArgs, NewFD);
|
||||
|
||||
llvm::Value *V = Builder.CreateBitCast(RV.getScalarVal(),
|
||||
ConvertType(E->getType()));
|
||||
|
||||
if (E->hasInitializer()) {
|
||||
ErrorUnsupported(E, "new expression with initializer");
|
||||
return llvm::UndefValue::get(ConvertType(E->getType()));
|
||||
}
|
||||
|
||||
if (!AllocType->isPODType()) {
|
||||
ErrorUnsupported(E, "new expression with non-POD type");
|
||||
return llvm::UndefValue::get(ConvertType(E->getType()));
|
||||
}
|
||||
|
||||
return V;
|
||||
}
|
||||
|
||||
static bool canGenerateCXXstructor(const CXXRecordDecl *RD,
|
||||
|
|
|
@ -0,0 +1,5 @@
|
|||
// RUN: clang-cc %s -emit-llvm -o %t
|
||||
|
||||
void t1() {
|
||||
int* a = new int;
|
||||
}
|
Loading…
Reference in New Issue