[PATCH] D112197: [msan] Don't use TLS slots of noundef args

[Kirill Stoimenov via Phabricator via llvm-commits]

kstoimenov added inline comments.


================
Comment at: llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp:3712-3713
         Size = DL.getTypeAllocSize(A->getType());
-        if (ArgOffset + Size > kParamTLSSize) break;
-        Store = IRB.CreateAlignedStore(ArgShadow, ArgShadowBase,
-                                       kShadowTLSAlignment);
-        Constant *Cst = dyn_cast<Constant>(ArgShadow);
-        if (Cst && Cst->isNullValue()) ArgIsInitialized = true;
+      } else {
+        if (ByVal) {
+          // ByVal requires some special handling as it's too big for a single
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vitalybuka wrote:
> kstoimenov wrote:
> > Consider converting this to "else if (ByVal)" to reduce indentation level. 
> Plain conversion will not work. There is IRB.CreateStore(getOrigin(A) which shared for both non EagerCheck branches
That makes sense. Let's keep as is. 


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D112197/new/

https://reviews.llvm.org/D112197