[all-commits] [llvm/llvm-project] 40abb2: RegAllocGreedy: Fix subranges when rematerializing...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 40abb28f616ee3ea3f12488a8c5d934f55016725
      https://github.com/llvm/llvm-project/commit/40abb28f616ee3ea3f12488a8c5d934f55016725
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2022-07-24 (Sun, 24 Jul 2022)

  Changed paths:
    M llvm/lib/CodeGen/LiveRangeEdit.cpp
    M llvm/test/CodeGen/AMDGPU/remat-vop.mir

  Log Message:
  -----------
  RegAllocGreedy: Fix subranges when rematerializing dead subreg defs

This would create a new interval missing the subrange and hit this
verifier error:

*** Bad machine code: Live interval for subreg operand has no subranges ***
- function:    test_remat_subreg_def
- basic block: %bb.0  (0xa568758) [0B;128B)
- instruction: 32B	dead undef %4.sub0:vreg_64 = V_MOV_B32_e32 2, implicit $exec