Wei Mi cac51be31f [X86] Disable loop unrolling in loop vectorization pass when VF is 1. ... The patch disabled unrolling in loop vectorization pass when VF==1 on x86 architecture, by setting MaxInterleaveFactor to 1. Unrolling in loop vectorization pass may introduce the cost of overflow check, memory boundary check and extra prologue/epilogue code when regular unroller will unroll the loop another time. Disable it when VF==1 remove the unnecessary cost on x86. The same can be done for other platforms after verifying interleaving/memory bound checking to be not perf critical on those platforms. Differential Revision: http://reviews.llvm.org/D9515 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236613 91177308-0d34-0410-b5e6-96231b3b80d8		2015-05-06 17:12:25 +00:00
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llvm	[X86] Disable loop unrolling in loop vectorization pass when VF is 1.	2015-05-06 17:12:25 +00:00
llvm-c	LTO: Add API to choose whether to embed uselists	2015-04-27 23:38:54 +00:00