[all-commits] [llvm/llvm-project] 8172ed: [X86] Speculatively fix to X86AvoidStoreForwarding...

[topperc via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 8172ed91f8ff753fb3042f39b0d43aed89fdd3e6
      https://github.com/llvm/llvm-project/commit/8172ed91f8ff753fb3042f39b0d43aed89fdd3e6
  Author: Craig Topper <craig.topper at intel.com>
  Date:   2020-06-24 (Wed, 24 Jun 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp

  Log Message:
  -----------
  [X86] Speculatively fix to X86AvoidStoreForwardingBlocks not deference a machine mem operand if there isn't one present.

Eric Christopher informed me that FastISel memcpy handling creates
load/store instructions without mem operands. We should fix that,
but I doubt that's the only case of missed mem operands so seems
better to be defensive here.

I don't have a test case yet, but I'll try to add one if i get a
test from Eric.