[PATCH] D134410: [clang][CodeGen] Add noundef metadata to load instructions (preliminary)

[Vitaly Buka via Phabricator via cfe-commits]

vitalybuka added a comment.





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Comment at: clang/lib/CodeGen/CGExpr.cpp:1746
 
+  if (auto TyPtr = Ty.getTypePtrOrNull()) {
+    if (!(TyPtr->isSpecificBuiltinType(BuiltinType::UChar) ||
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Taking into account potantial risks from pre-existing UB, I believe we need clang switch to be able to shutdown this branch, similar to enable_noundef_analysis.
User with large code bases maybe need some time for transition.

I have no opinion if this should be ON or OFF by default


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D134410/new/

https://reviews.llvm.org/D134410