[all-commits] [llvm/llvm-project] 848224: [GlobalISel] Correct constant type in matchReassoc...

[chenglin.bi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 84822479006e177c6388ba77acf2c12a73243870
      https://github.com/llvm/llvm-project/commit/84822479006e177c6388ba77acf2c12a73243870
  Author: chenglin.bi <chenglin.bi at linaro.org>
  Date:   2022-11-13 (Sun, 13 Nov 2022)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-ptradd-chain.mir

  Log Message:
  -----------
  [GlobalISel] Correct constant type in matchReassocConstantInnerLHS

When we match a pattern from m_GCst, the register type could be different from original op. So we can't replace the original op to vreg direct.
This code create a new constant with original op type then replace the original op.

Fix #58906

Reviewed By: arsenm, aemerson

Differential Revision: https://reviews.llvm.org/D137778