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2 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
bc70ff3cb9 Handle extra Tail predecessors in if-conversion. 
It is still possible to if-convert if the tail block has extra
predecessors, but the tail phis must be rewritten instead of being
removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161781 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-08-13 20:49:04 +00:00
Jakob Stoklund Olesen
59bde4d8a1 Add early if-conversion support to X86. 
Implement the TII hooks needed by EarlyIfConversion to create cmov
instructions and estimate their latency.

Early if-conversion is still not enabled by default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159695 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-04 00:09:58 +00:00