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Commit 2cd1f0be authored by Andrew Trick's avatar Andrew Trick
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Selection DAG scheduler register pressure heuristic fixes. 

Added a check for already live regs before claiming HighRegPressure.
Fixed a few cases of checking the wrong number of successors.
Added some tracing until these heuristics are better understood.

llvm-svn: 123892
parent 4060abb4
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