[clang] [clang] Add size filter for stack auto init (PR #74777)

[Haopeng Liu via cfe-commits]

================
@@ -1759,20 +1759,29 @@ void 
CodeGenFunction::emitZeroOrPatternForAutoVarInit(QualType type,
                                                       const VarDecl &D,
                                                       Address Loc) {
   auto trivialAutoVarInit = getContext().getLangOpts().getTrivialAutoVarInit();
+  auto trivialAutoVarInitSizeBound =
+      getContext().getLangOpts().TrivialAutoVarInitSizeBound;
   CharUnits Size = getContext().getTypeSizeInChars(type);
   bool isVolatile = type.isVolatileQualified();
   if (!Size.isZero()) {
+    auto allocSize = 
CGM.getDataLayout().getTypeAllocSize(Loc.getElementType());
----------------
haopliu wrote:

Thank you both for clarifying! Moved the filtering to `emitStoresForConstant` 
before memset.
Please take another look :-D

https://github.com/llvm/llvm-project/pull/74777
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