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
..
IPA	Clear the cached cost when removing a function in	2009-03-19 18:03:56 +00:00
AliasAnalysis.cpp	Generalize some alias analysis logic from atomic	2009-02-14 10:56:35 +00:00
AliasAnalysisCounter.cpp
AliasAnalysisEvaluator.cpp	simplify logic and get rid of the assumption that operand 0 is the callee	2009-03-24 19:28:39 +00:00
AliasDebugger.cpp	Refactor my previous change to maintain the distinction between AliasAnalysis and BasicAliasAnalysis. This involves some wider changes because it	2009-02-05 23:36:27 +00:00
AliasSetTracker.cpp	getEntryFor() may invalidate DenseMap iterator.	2009-03-30 18:34:47 +00:00
Analysis.cpp
BasicAliasAnalysis.cpp	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00
CaptureTracking.cpp	Revert r70876 and add a testcase (@c7) showing the problem:	2009-05-07 18:08:34 +00:00
CFGPrinter.cpp
CMakeLists.txt	Fix the Win32 VS2008 build:	2009-03-19 23:26:52 +00:00
ConstantFolding.cpp	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00
DbgInfoPrinter.cpp	Oops...I committed too much.	2009-03-13 04:39:26 +00:00
DebugInfo.cpp	Print out nicer dump info for DIDescriptor.	2009-05-08 20:28:06 +00:00
InstCount.cpp
Interval.cpp
IntervalPartition.cpp
IVUsers.cpp	Factor the code for collecting IV users out of LSR into an IVUsers class,	2009-05-12 02:17:14 +00:00
LibCallAliasAnalysis.cpp
LibCallSemantics.cpp
LiveValues.cpp	Enhance LiveValues to work on PHI operands.	2009-03-23 15:49:37 +00:00
LoopInfo.cpp	Change the description string of the LoopInfo pass.	2009-05-01 21:58:05 +00:00
LoopPass.cpp	Before deleting a basic block, give other loop passes a chance cleanup analysis values, related to the instructions in the basic block.	2009-03-25 23:57:48 +00:00
LoopVR.cpp	More const qualifiers.	2009-04-18 17:57:20 +00:00
Makefile
MemoryDependenceAnalysis.cpp	now that you can put a PointerIntPair in a SmallPtrSet, remove some	2009-03-29 00:24:04 +00:00
PostDominators.cpp
ProfileInfo.cpp
ProfileInfoLoader.cpp
ProfileInfoLoaderPass.cpp
ScalarEvolution.cpp	When forgetting SCEVs for loop PHIs, don't forget SCEVUnknown values.	2009-05-12 01:27:58 +00:00
ScalarEvolutionExpander.cpp	Actually insert inserted instructions into the InsertedValues map.	2009-05-01 17:13:31 +00:00
SparsePropagation.cpp	Make Print callable from a pass's print method: add const qualifier. No	2009-03-11 20:50:17 +00:00
Trace.cpp
ValueTracking.cpp	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00