Jakob Stoklund Olesen 84ef6ba443 Add trace accessor methods, implement primitive if-conversion heuristic.
Compare the critical paths of the two traces through an if-conversion
candidate. If the difference is larger than the branch brediction
penalty, reject the if-conversion. If would never pay.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161433 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-07 18:02:19 +00:00
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2012-07-19 00:15:11 +00:00
2012-07-19 21:43:55 +00:00