forked from OSchip/llvm-project
28192c9398
speculate. Without this, loop rotate (among many other places) would suddenly stop working in the presence of debug info. I found this looking at loop rotate, and have augmented its tests with a reduction out of a very hot loop in yacr2 where failing to do this rotation costs sometimes more than 10% in runtime performance, perturbing numerous downstream optimizations. This should have no impact on performance without debug info, but the change in performance when debug info is enabled can be extreme. As a consequence (and this how I got to this yak) any profiling of performance problems should be treated with deep suspicion -- they may have been wildly innacurate of debug info was enabled for profiling. =/ Just a heads up. llvm-svn: 154263 |
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| .. | ||
| 2009-01-25-SingleEntryPhi.ll | ||
| PhiRename-1.ll | ||
| PhiSelfRefernce-1.ll | ||
| alloca.ll | ||
| basic.ll | ||
| crash.ll | ||
| dbgvalue.ll | ||
| indirectbr.ll | ||
| lit.local.cfg | ||
| phi-duplicate.ll | ||
| pr2639.ll | ||
| preserve-scev.ll | ||
| simplifylatch.ll | ||