[all-commits] [llvm/llvm-project] dc306a: [HLSL] Build elementwise cast results from poison ...

[Farzon Lotfi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dc306a24fefef0e3cbde890bc25e30d4b753498f
      https://github.com/llvm/llvm-project/commit/dc306a24fefef0e3cbde890bc25e30d4b753498f
  Author: Farzon Lotfi <farzonlotfi at microsoft.com>
  Date:   2026-09-28 (Mon, 28 Sep 2026)

  Changed paths:
    M clang/lib/CodeGen/CGExprScalar.cpp
    M clang/test/CodeGenHLSL/BasicFeatures/MatrixElementTypeCast.hlsl
    M clang/test/CodeGenHLSL/BasicFeatures/VectorElementwiseCast.hlsl

  Log Message:
  -----------
  [HLSL] Build elementwise cast results from poison (#225591)

I noticed this unnecessary alloca while doing this pr:
https://github.com/llvm/llvm-project/pull/225519

The change is to initialize vector and matrix elementwise cast results
with poison instead of loading uninitialized temporary storage.

We do this because every result element is overwritten before use,
making the temporary allocation and load unnecessary.



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