Jakob Stoklund Olesen 3de23e6f6c Fix inverted conflict test in -early-coalesce. ...

A non-identity copy cannot be coalesced when the phi join destination register
is live at the copy site.

Also verify the condition that the PHI join source register is only used in
the PHI join. Otherwise the coalescing is invalid.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86322 91177308-0d34-0410-b5e6-96231b3b80d8

2009-11-07 01:58:40 +00:00

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