Dan Gohman 81db61a2e6 Factor the code for collecting IV users out of LSR into an IVUsers class, ... and generalize it so that it can be used by IndVarSimplify. Implement the base IndVarSimplify transformation code using IVUsers. This removes TestOrigIVForWrap and associated code, as ScalarEvolution now has enough builtin overflow detection and folding logic to handle all the same cases, and more. Run "opt -iv-users -analyze -disable-output" on your favorite loop for an example of what IVUsers does. This lets IndVarSimplify eliminate IV casts and compute trip counts in more cases. Also, this happens to finally fix the remaining testcases in PR1301. Now that IndVarSimplify is being more aggressive, it occasionally runs into the problem where ScalarEvolutionExpander's code for avoiding duplicate expansions makes it difficult to ensure that all expanded instructions dominate all the instructions that will use them. As a temporary measure, IndVarSimplify now uses a FixUsesBeforeDefs function to fix up instructions inserted by SCEVExpander. Fortunately, this code is contained, and can be easily removed once a more comprehensive solution is available. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71535 91177308-0d34-0410-b5e6-96231b3b80d8		2009-05-12 02:17:14 +00:00
..
ADCE.cpp	Allow readonly functions to unwind exceptions. Teach	2009-05-06 06:49:50 +00:00
BasicBlockPlacement.cpp
CMakeLists.txt
CodeGenPrepare.cpp	Restore minor deletion.	2009-05-04 18:40:41 +00:00
CondPropagate.cpp	Avoid making the transformation enabled by my last patch if the new destinations have phi nodes.	2009-04-15 00:43:54 +00:00
ConstantProp.cpp
DCE.cpp	Eliminate several more unnecessary intptr_t casts.	2009-02-18 05:09:16 +00:00
DeadStoreElimination.cpp	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00
GVN.cpp	Allow readonly functions to unwind exceptions. Teach	2009-05-06 06:49:50 +00:00
GVNPRE.cpp
IndVarSimplify.cpp	Factor the code for collecting IV users out of LSR into an IVUsers class,	2009-05-12 02:17:14 +00:00
InstructionCombining.cpp	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00
JumpThreading.cpp	Restore minor deletion.	2009-05-04 18:40:41 +00:00
LICM.cpp	Revert r67798: it breaks llvm-gcc bootstrap on x86-64-linux, presumably due to	2009-03-27 14:56:47 +00:00
LoopDeletion.cpp	Allow readonly functions to unwind exceptions. Teach	2009-05-06 06:49:50 +00:00
LoopIndexSplit.cpp	Allow readonly functions to unwind exceptions. Teach	2009-05-06 06:49:50 +00:00
LoopRotation.cpp	Do not count DbgInfoIntrinsic while estimating loop header size.	2009-03-06 03:51:30 +00:00
LoopStrengthReduce.cpp	Factor the code for collecting IV users out of LSR into an IVUsers class,	2009-05-12 02:17:14 +00:00
LoopUnroll.cpp	Adjust loop size estimate for full unrolling;	2009-04-20 22:19:33 +00:00
LoopUnswitch.cpp	Allow readonly functions to unwind exceptions. Teach	2009-05-06 06:49:50 +00:00
Makefile	Removed trailing whitespace from Makefiles.	2009-01-09 16:44:42 +00:00
MemCpyOptimizer.cpp	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00
PredicateSimplifier.cpp
Reassociate.cpp	Make the key of ValueRankMap an AssertingVH, so that we die violently	2009-03-31 22:13:29 +00:00
Reg2Mem.cpp
Scalar.cpp	add a bunch more passes to the C bindings (PR3734), patch by	2009-03-06 16:52:18 +00:00
ScalarReplAggregates.cpp	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00
SCCP.cpp	Factorize out a concept - no functionality change.	2009-03-21 21:27:31 +00:00
SimplifyCFGPass.cpp	Revert r66920. It was causing failures in the self-hosting buildbot (in release	2009-03-13 21:15:59 +00:00
SimplifyHalfPowrLibCalls.cpp	eliminate warning when asserts disabled.	2008-12-14 21:36:23 +00:00
SimplifyLibCalls.cpp	"There was a typo in my previous patch which leads to miscompilation of	2009-04-12 18:22:33 +00:00
TailDuplication.cpp	Allow readonly functions to unwind exceptions. Teach	2009-05-06 06:49:50 +00:00
TailRecursionElimination.cpp	Allow readonly functions to unwind exceptions. Teach	2009-05-06 06:49:50 +00:00