Chandler Carruth c0d18b6696 Fix ValueTracking to conclude that debug intrinsics are safe to ... 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154263 91177308-0d34-0410-b5e6-96231b3b80d8		2012-04-07 19:22:18 +00:00
..
2009-01-25-SingleEntryPhi.ll
alloca.ll	loop-rotate shouldn't hoist alloca instructions out of a loop. Patch by Patrik Hägglund, with slightly modified test. Issue reported by Patrik Hägglund on llvmdev.	2012-02-16 00:41:10 +00:00
basic.ll	Teach loop rotate to hoist trivially invariant instructions	2010-09-06 01:10:22 +00:00
crash.ll	remove asmparser support for the old getresult instruction, which has been subsumed by extractvalue.	2011-06-17 06:57:15 +00:00
dbgvalue.ll	Fix ValueTracking to conclude that debug intrinsics are safe to	2012-04-07 19:22:18 +00:00
indirectbr.ll
lit.local.cfg	Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.	2012-02-16 06:28:33 +00:00
phi-duplicate.ll	When loop rotation happens, it is *very* common for the duplicated condbr	2011-01-08 19:59:06 +00:00
PhiRename-1.ll	Remove support for using "foo" as symbols instead of %"foo". This is ancient	2011-06-17 06:36:20 +00:00
PhiSelfRefernce-1.ll
pr2639.ll
preserve-scev.ll
simplifylatch.ll	Add simplifyLoopLatch to LoopRotate pass.	2012-02-14 00:00:23 +00:00