[all-commits] [llvm/llvm-project] 1f6165: X86: Fix convertToThreeAddress losing subregister ...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1f6165e1844a69a726b92cf8821a645b0fff5303
      https://github.com/llvm/llvm-project/commit/1f6165e1844a69a726b92cf8821a645b0fff5303
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-02-19 (Wed, 19 Feb 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86FastISel.cpp
    M llvm/lib/Target/X86/X86InstrBuilder.h
    M llvm/lib/Target/X86/X86InstrInfo.cpp
    M llvm/lib/Target/X86/X86InstrInfo.h

  Log Message:
  -----------
  X86: Fix convertToThreeAddress losing subregister indexes (#124098)

This avoids dozens of regressions in a future patch. These
primarily manifested as assertions where we had copies of 64-bit
registers to 32-bit registers.

This is testable in principle with hand written MIR, but that's
a bit too much x86 for me.



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