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3 Commits

Author SHA1 Message Date
Kevin Qin
a56999c5de Reapply 'Run LICM pass after loop unrolling pass.' 
It's firstly committed at r231630, and reverted at r231635.

Function pass InstructionSimplifier is inserted as barrier to
make sure loop unroll pass won't affect on LICM pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232011 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-12 05:36:01 +00:00
Kevin Qin
1428f080a8 Revert r231630 - Run LICM pass after loop unrolling pass. 
As it broke llvm bootstrap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231635 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-09 07:26:37 +00:00
Kevin Qin
3836dd0315 Run LICM pass after loop unrolling pass. 
Runtime unrollng will introduce a runtime check in loop prologue.
If the unrolled loop is a inner loop, then the proglogue will be inside
the outer loop. LICM pass can help to promote the runtime check out if
the checked value is loop invariant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231630 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-09 06:14:07 +00:00