Dan Gohman 4b35f83b91 Teach LoopSimplify how to merge multiple loop exits into a single exit, ... when one of them can be converted to a trivial icmp and conditional branch. This addresses what is essentially a phase ordering problem. SimplifyCFG knows how to do this transformation, but it doesn't do so if the primary block has any instructions in it other than an icmp and a branch. In the given testcase, the block contains other instructions, however they are loop-invariant and can be hoisted. SimplifyCFG doesn't have LoopInfo though, so it can't hoist them. And, it's important that the blocks be merged before LoopRotation, as it doesn't support multiple-exit loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74396 91177308-0d34-0410-b5e6-96231b3b80d8		2009-06-27 21:30:38 +00:00
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AddrModeMatcher.h	Factor address mode matcher out of codegen prepare to make it available to other passes, e.g. loop strength reduction.	2009-02-20 18:24:38 +00:00
BasicBlockUtils.h	Re-apply 70645, converting ScalarEvolution to use	2009-05-04 22:30:44 +00:00
BasicInliner.h	Add explicit keywords.	2008-07-07 18:00:37 +00:00
Cloning.h	Revert 51775.	2008-05-30 22:47:19 +00:00
FunctionUtils.h	Prune and tidy #includes.	2008-05-29 19:52:31 +00:00
InlineCost.h	These bitfields were being miscompiled on some	2009-04-20 16:03:21 +00:00
Local.h	Teach LoopSimplify how to merge multiple loop exits into a single exit,	2009-06-27 21:30:38 +00:00
PromoteMemToReg.h	Don't attribute in file headers anymore. See llvmdev for the	2007-12-29 19:59:42 +00:00
UnifyFunctionExitNodes.h	Tidy up several unbeseeming casts from pointer to intptr_t.	2008-09-04 17:05:41 +00:00
UnrollLoop.h	Commit the header I accidentally left out of 51083.	2008-05-14 04:39:40 +00:00
ValueMapper.h	Don't attribute in file headers anymore. See llvmdev for the	2007-12-29 19:59:42 +00:00