Evan Cheng 3858451e09 - Change MachineInstr::findRegisterDefOperandIdx so it can also look for defs ...

that are aliases of the specified register.
- Rename modifiesRegister to definesRegister since it's looking a def of the
specific register or one of its super-registers. It's not looking for def of a
sub-register or alias that could change the specified register.
- Added modifiesRegister to look for defs of aliases.

llvm-svn: 104377

2010-05-21 20:53:24 +00:00

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