[all-commits] [llvm/llvm-project] ae363d: [HLSL][Matrix] Make Matrix InitListExprs and AST r...

[Deric C. via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ae363d50ad292b4d8c33bf795ad16c79eb640b19
      https://github.com/llvm/llvm-project/commit/ae363d50ad292b4d8c33bf795ad16c79eb640b19
  Author: Deric C. <cheung.deric at gmail.com>
  Date:   2026-03-02 (Mon, 02 Mar 2026)

  Changed paths:
    M clang/include/clang/AST/TypeBase.h
    M clang/lib/CodeGen/CGExprScalar.cpp
    M clang/lib/Sema/SemaInit.cpp
    M clang/test/AST/HLSL/matrix-constructors.hlsl
    M clang/test/AST/HLSL/matrix-general-initializer.hlsl
    A clang/test/AST/HLSL/matrix-init-list-row-major.hlsl
    M clang/test/CodeGenHLSL/BasicFeatures/MatrixConstructor.hlsl
    A clang/test/CodeGenHLSL/BasicFeatures/MatrixInitializerListOrder.hlsl
    M clang/test/CodeGenHLSL/BasicFeatures/MatrixToAndFromVectorConstructors.hlsl
    M clang/test/CodeGenHLSL/BoolMatrix.hlsl

  Log Message:
  -----------
  [HLSL][Matrix] Make Matrix InitListExprs and AST row-major order, and respect /Zpr and /Zpc in codegen (#182904)

Fixes #166410 and #181902

This PR makes matrix initializer lists be kept in row-major order in
InitListExpr and the AST for HLSL by not reordering the element indices
in `InitListChecker::CheckMatrixType` in `clang/lib/Sema/SemaInit.cpp`.
This PR also makes the codegen respect /Zpr and /Zpc during codegen for
matrix initializer lists by adding a vector shuffle to
`VisitInitListExpr` in `clang/lib/CodeGen/CGExprScalar.cpp`.

Assisted-by: claude-opus-4.6

---------

Co-authored-by: Farzon Lotfi <farzonl at gmail.com>



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