================
@@ -2456,6 +2461,139 @@ static RValue
EmitHipStdParUnsupportedBuiltin(CodeGenFunction *CGF,
return RValue::get(CGF->Builder.CreateCall(UBF, Args));
}
+template <class T>
+void RecursivelyClearPaddingImpl(CodeGenFunction &CGF, Value *Ptr, QualType
Ty, size_t CurrentStartOffset, size_t &RunningOffset, T&& WriteZeroAtOffset);
+
+template <class T>
+void ClearPaddingStruct(CodeGenFunction &CGF, Value *Ptr, QualType Ty,
StructType *ST,
+ size_t CurrentStartOffset, size_t &RunningOffset, T&&
WriteZeroAtOffset) {
+ std::cerr << "\n struct! " << ST->getName().data() << std::endl;
+ auto SL = CGF.CGM.getModule().getDataLayout().getStructLayout(ST);
+
+ auto R = dyn_cast<CXXRecordDecl>(Ty->getAsRecordDecl());
+ if(!R) {
+ std::cerr << "\n not a CXXRecordDecl" << std::endl;
+
+ }
+ const ASTRecordLayout &ASTLayout = CGF.getContext().getASTRecordLayout(R);
+ for (auto Base : R->bases()) {
+ std::cerr << "\n\n base!" << std::endl;
+ // Zero padding between base elements.
+ auto BaseRecord = cast<CXXRecordDecl>(Base.getType()->getAsRecordDecl());
+ auto Offset = static_cast<size_t>(
+ ASTLayout.getBaseClassOffset(BaseRecord).getQuantity());
+ // Recursively zero out base classes.
+ auto Index = SL->getElementContainingOffset(Offset);
----------------
efriedma-quic wrote:
I'm a bit skeptical it's a good idea to rely on the LLVM StructLayout for this;
lowering from a clang type to an LLVM type involves a bunch of transforms. Can
we use information from the clang RecordLayout instead?
https://github.com/llvm/llvm-project/pull/75371
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