[PATCH] D93793: [IR] Let IRBuilder's CreateVectorSplat/CreateShuffleVector use poison as placeholder

[Juneyoung Lee via Phabricator via cfe-commits]

aqjune marked an inline comment as done.
aqjune added inline comments.


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Comment at: llvm/lib/IR/IRBuilder.cpp:1020
   Value *Zeros = ConstantAggregateZero::get(VectorType::get(I32Ty, EC));
-  return CreateShuffleVector(V, Undef, Zeros, Name + ".splat");
+  return CreateShuffleVector(V, Poison, Zeros, Name + ".splat");
 }
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spatel wrote:
> I'm still catching up on reviews/mails, so ignore if this was already discussed:
> Can we change this usage of CreateShuffleVector to the unary operand version, so we're reducing the number of explicit places where we need to specify poison?
Yes, it makes sense.
I'll update D93817 to use the unary version as well.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D93793/new/

https://reviews.llvm.org/D93793