Evan Cheng bf4070756f Teach if-converter to be more careful with predicating instructions that would ...

take multiple cycles to decode.
For the current if-converter clients (actually only ARM), the instructions that
are predicated on false are not nops. They would still take machine cycles to
decode. Micro-coded instructions such as LDM / STM can potentially take multiple
cycles to decode. If-converter should take treat them as non-micro-coded
simple instructions.

llvm-svn: 113570

2010-09-10 01:29:16 +00:00

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