[PATCH] D50339: Consistently use MemoryLocation::UnknownSize to indicate unknown access size

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz created this revision.
kparzysz added a reviewer: MatzeB.
Herald added a subscriber: jfb.

1. Change the software pipeliner to use unknown size instead of dropping memory operands. It used to do it before, but MachineInstr::mayAlias did not handle it correctly.
2. Recognize UnknownSize in MachineInstr::mayAlias.
3. Print and parse UnknownSize in MIR.


Repository:
  rL LLVM

https://reviews.llvm.org/D50339

Files:
  lib/CodeGen/MIRParser/MILexer.cpp
  lib/CodeGen/MIRParser/MILexer.h
  lib/CodeGen/MIRParser/MIParser.cpp
  lib/CodeGen/MachineInstr.cpp
  lib/CodeGen/MachineOperand.cpp
  lib/CodeGen/MachinePipeliner.cpp
  test/CodeGen/MIR/X86/expected-size-integer-after-memory-operation.mir
  test/CodeGen/MIR/X86/expected-size-integer-after-memory-operation2.mir
  test/CodeGen/MIR/X86/memory-operands.mir

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