Evan Cheng 22d405f57b Teach two-address pass to update the "source" map so it doesn't perform a ...

non-profitable commute using outdated info. The test case would still fail
because of poor pre-RA schedule. That will be fixed by MI scheduler.

rdar://11472010

llvm-svn: 157038

2012-05-18 01:33:51 +00:00

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