Bob Wilson fe61fb1e10 Add a new pass on machine instructions to optimize away PHI cycles that ... reduce down to a single value. InstCombine already does this transformation but DAG legalization may introduce new opportunities. This has turned out to be important for ARM where 64-bit values are split up during type legalization: InstCombine is not able to remove the PHI cycles on the 64-bit values but the separate 32-bit values can be optimized. I measured the compile time impact of this (running llc on 176.gcc) and it was not significant. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95951 91177308-0d34-0410-b5e6-96231b3b80d8		2010-02-12 01:30:21 +00:00
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llvm	Add a new pass on machine instructions to optimize away PHI cycles that	2010-02-12 01:30:21 +00:00
llvm-c	Added header file declarations and .exports entries	2010-02-08 23:34:25 +00:00