[all-commits] [llvm/llvm-project] 3cab81: [PowerPC] fixupIsDeadOrKill start and end in diffe...

[Chen Zheng via All-commits]

  Branch: refs/heads/release/11.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 3cab8184f32067464f3ab6bdfd6e123ddd38ef0f
      https://github.com/llvm/llvm-project/commit/3cab8184f32067464f3ab6bdfd6e123ddd38ef0f
  Author: Chen Zheng <czhengsz at cn.ibm.com>
  Date:   2020-08-05 (Wed, 05 Aug 2020)

  Changed paths:
    M llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
    M llvm/lib/Target/PowerPC/PPCInstrInfo.h
    A llvm/test/CodeGen/PowerPC/fixup-kill-dead-flag-crash.mir

  Log Message:
  -----------
  [PowerPC] fixupIsDeadOrKill start and end in different block fixing

In fixupIsDeadOrKill, we assume StartMI and EndMI not exist in same
basic block, so we add an assertion in that function. This is wrong
before RA, as before RA the true definition may exist in another
block through copy like instructions.

Reviewed By: nemanjai

Differential Revision: https://reviews.llvm.org/D83365

(cherry picked from commit 36f9fe2d3493717dbc6866d96b2e989839ce1a4c)