Evan Cheng 7ff831962a - Add TargetInstrInfo::isIdentical(). It's similar to MachineInstr::isIdentical ...

except it doesn't care if the definitions' virtual registers differ. This is
  used by machine LICM and other MI passes to perform CSE.
- Teach Thumb2InstrInfo::isIdentical() to check two t2LDRpci_pic are identical.
  Since pc relative constantpool entries are always different, this requires it
  it check if the values can actually the same.

llvm-svn: 86328

2009-11-07 03:52:02 +00:00

4.1 KiB

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