================
@@ -2538,6 +2539,205 @@ 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,
+ bool VisitVirtualBase);
+
+template <class T>
+void ClearPaddingStruct(CodeGenFunction &CGF, Value *Ptr, QualType Ty,
+ StructType *ST, size_t CurrentStartOffset,
+ size_t &RunningOffset, T &&WriteZeroAtOffset,
+ bool VisitVirtualBase) {
+ llvm::dbgs() << "clear padding struct: " << ST->getName().data() << '\n';
+ const auto &DL = CGF.CGM.getModule().getDataLayout();
+ auto *SL = DL.getStructLayout(ST);
+ auto *R = dyn_cast<CXXRecordDecl>(Ty->getAsRecordDecl());
+ if (!R) {
+ llvm::dbgs() << "Not a CXXRecordDecl\n";
+ return;
+ }
+ const ASTRecordLayout &ASTLayout = CGF.getContext().getASTRecordLayout(R);
+ if (ASTLayout.hasOwnVFPtr()) {
+ llvm::dbgs() << "vtable ptr. Incrementing RunningOffset from "
+ << RunningOffset << " to "
+ << RunningOffset + DL.getPointerSizeInBits() / 8 << '\n';
+ RunningOffset += DL.getPointerSizeInBits() / 8;
+ }
+ std::vector<std::pair<size_t, CXXBaseSpecifier>> Bases;
+ Bases.reserve(R->getNumBases());
+ // todo get vbases
+ for (auto Base : R->bases()) {
+ auto *BaseRecord = cast<CXXRecordDecl>(Base.getType()->getAsRecordDecl());
+ if (!Base.isVirtual()) {
+ auto Offset = static_cast<size_t>(
----------------
efriedma-quic wrote:
Don't use size_t for target offsets. Prefer CharUnits, or if you need a raw
number for some reason, uint64_t. (We want to make sure cross-compilation
works correctly on 32-bit hosts.)
https://github.com/llvm/llvm-project/pull/75371
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