[all-commits] [llvm/llvm-project] fae8df: [DirectX] Fix GEP flattening with 0-indexed GEPs o...

[Deric C. via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fae8df2b82692ec8f69ba578847713f0da6e1ddc
      https://github.com/llvm/llvm-project/commit/fae8df2b82692ec8f69ba578847713f0da6e1ddc
  Author: Deric C. <cheung.deric at gmail.com>
  Date:   2025-07-17 (Thu, 17 Jul 2025)

  Changed paths:
    M llvm/lib/Target/DirectX/DXILFlattenArrays.cpp
    M llvm/test/CodeGen/DirectX/flatten-array.ll

  Log Message:
  -----------
  [DirectX] Fix GEP flattening with 0-indexed GEPs on global variables (#149211)

Fixes #149179 

The issue is that `Builder.CreateGEP` does not return a GEP Instruction
or GEP ContantExpr when the pointer operand is a global variable and all
indices are constant zeroes.

This PR ensures that a GEP instruction is created if `Builder.CreateGEP`
did not return a GEP.



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