[all-commits] [llvm/llvm-project] 3a2f13: [HLSL] Extract matrix elementwise cast operands fr...

[Farzon Lotfi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3a2f13ff993961e7bd745a37d6f163fe46657150
      https://github.com/llvm/llvm-project/commit/3a2f13ff993961e7bd745a37d6f163fe46657150
  Author: Farzon Lotfi <farzonlotfi at microsoft.com>
  Date:   2026-09-29 (Tue, 29 Sep 2026)

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

  Log Message:
  -----------
  [HLSL] Extract matrix elementwise cast operands from SSA (#227065)

Avoid materializing matrix operands in the hlsl.ewcast.src temporary
when performing matrix-to-vector elementwise casts. Extract each element
directly from the canonical matrix SSA value using its column-major
flattened index.

Factor vector result construction into a shared helper so aggregate and
matrix sources use the same conversion and insertion logic.

Update the matrix-to-vector CodeGen checks for both row-major and
column-major layouts.

Assisted by Copilot using GPT 5.6 Sol



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