[PATCH] D67122: [UBSan][clang][compiler-rt] Applying non-zero offset to nullptr is undefined behaviour

[Roman Lebedev via Phabricator via cfe-commits]

lebedev.ri added inline comments.


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Comment at: clang/lib/CodeGen/CGExprScalar.cpp:4657
+      Builder.GetInsertBlock()->getParent(), PtrTy->getPointerAddressSpace());
+  // Check for overflows unless the GEP got constant-folded,
+  // and only in the default address space
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rsmith wrote:
> If we want to split out the "constant folded" case to avoid issuing too many sanitizer traps on bogus but common patterns, we should have another sanitizer group to re-enable those diagnostics for the constant-folded cases. (I'm fine with not doing that in this patch, though.)
I'm not sure about this point, i think i'm gonna leave this as-is for now..


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D67122/new/

https://reviews.llvm.org/D67122