Make IRGen compatible with declaring a function with incomplete
return/argument types. (The generated IR isn't ideal, but we can't
really do better in general.)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66132 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 422415c..a187f8a 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -779,13 +779,24 @@
llvm::GlobalValue *
CodeGenModule::EmitForwardFunctionDefinition(const FunctionDecl *D,
const llvm::Type *Ty) {
- if (!Ty)
+ bool DoSetAttributes = true;
+ if (!Ty) {
Ty = getTypes().ConvertType(D->getType());
+ if (!isa<llvm::FunctionType>(Ty)) {
+ // This function doesn't have a complete type (for example, the return
+ // type is an incomplete struct). Use a fake type instead, and make
+ // sure not to try to set attributes.
+ Ty = llvm::FunctionType::get(llvm::Type::VoidTy,
+ std::vector<const llvm::Type*>(), false);
+ DoSetAttributes = false;
+ }
+ }
llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty),
llvm::Function::ExternalLinkage,
getMangledName(D),
&getModule());
- SetFunctionAttributes(D, F);
+ if (DoSetAttributes)
+ SetFunctionAttributes(D, F);
return F;
}