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Stepan Dyatkovskiy 24473120a2 SwitchInst refactoring. 
The purpose of refactoring is to hide operand roles from SwitchInst user (programmer). If you want to play with operands directly, probably you will need lower level methods than SwitchInst ones (TerminatorInst or may be User). After this patch we can reorganize SwitchInst operands and successors as we want.

What was done:

1. Changed semantics of index inside the getCaseValue method:
getCaseValue(0) means "get first case", not a condition. Use getCondition() if you want to resolve the condition. I propose don't mix SwitchInst case indexing with low level indexing (TI successors indexing, User's operands indexing), since it may be dangerous.
2. By the same reason findCaseValue(ConstantInt*) returns actual number of case value. 0 means first case, not default. If there is no case with given value, ErrorIndex will returned.
3. Added getCaseSuccessor method. I propose to avoid usage of TerminatorInst::getSuccessor if you want to resolve case successor BB. Use getCaseSuccessor instead, since internal SwitchInst organization of operands/successors is hidden and may be changed in any moment.
4. Added resolveSuccessorIndex and resolveCaseIndex. The main purpose of these methods is to see how case successors are really mapped in TerminatorInst.
4.1 "resolveSuccessorIndex" was created if you need to level down from SwitchInst to TerminatorInst. It returns TerminatorInst's successor index for given case successor.
4.2 "resolveCaseIndex" converts low level successors index to case index that curresponds to the given successor.

Note: There are also related compatability fix patches for dragonegg, klee, llvm-gcc-4.0, llvm-gcc-4.2, safecode, clang.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149481 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-01 07:49:51 +00:00
..
AliasAnalysis.h Fix extra whitespace in comment. 2011-10-15 19:36:45 +00:00
AliasSetTracker.h Fix AliasSetTracker so that it doesn't make any assumptions about instructions it doesn't know about (like the atomic instructions I'm adding). 2011-07-27 00:46:46 +00:00
BlockFrequencyImpl.h Add some constantness to BranchProbabilityInfo and BlockFrequnencyInfo. 2011-12-20 20:03:10 +00:00
BlockFrequencyInfo.h Add some constantness to BranchProbabilityInfo and BlockFrequnencyInfo. 2011-12-20 20:03:10 +00:00
BranchProbabilityInfo.h Remove return heuristics from the static branch probabilities, and 2011-10-24 12:01:08 +00:00
CallGraph.h Teach the CallGraph to ignore calls to intrinsics. 2011-06-09 19:46:27 +00:00
CaptureTracking.h Move includes to the .cpp file. 2012-01-17 22:16:31 +00:00
CFGPrinter.h SwitchInst refactoring. 2012-02-01 07:49:51 +00:00
CodeMetrics.h Fix grammar error noticed by Duncan. 2011-12-29 02:15:06 +00:00
ConstantFolding.h Split the interesting bits of ConstantFoldLoadThroughGEPConstantExpr 2012-01-24 05:43:50 +00:00
ConstantsScanner.h
DebugInfo.h Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch 2011-12-20 02:50:00 +00:00
DIBuilder.h Add a new wrapper node for a DILexicalBlock that encapsulates it and a 2011-10-11 22:59:11 +00:00
DominanceFrontier.h Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch 2011-12-20 02:50:00 +00:00
DominatorInternals.h Change the Dominators recalculate() function to only rely on GraphTraits 2011-12-05 19:17:04 +00:00
Dominators.h SCEVExpander fixes. Affects LSR and indvars. 2012-01-20 07:41:13 +00:00
DomPrinter.h
DOTGraphTraitsPass.h Remove all remaining uses of Value::getNameStr(). 2011-11-15 16:27:03 +00:00
FindUsedTypes.h land David Blaikie's patch to de-constify Type, with a few tweaks. 2011-07-18 04:54:35 +00:00
InlineCost.h Make headers standalone. 2011-11-14 17:45:03 +00:00
InstructionSimplify.h Propagate TargetLibraryInfo throughout ConstantFolding.cpp and 2011-12-01 03:08:23 +00:00
Interval.h
IntervalIterator.h Use std::vector rather than SmallVector here because SmallVector 2010-07-08 13:06:08 +00:00
IntervalPartition.h Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
IVUsers.h Put all IVUsers in the processed set. Allow querying IVUsers with isIVUserOrOperand. 2012-01-06 21:41:55 +00:00
LazyValueInfo.h Fix a few more places where TargetData/TargetLibraryInfo is not being passed. 2011-12-02 01:26:24 +00:00
LibCallAliasAnalysis.h Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
LibCallSemantics.h Remove the experimental AliasAnalysis::getDependency interface, which 2010-09-14 21:25:10 +00:00
Lint.h Remove unused STL header includes. 2011-04-23 19:53:52 +00:00
Loads.h Move FindAvailableLoadedValue isSafeToLoadUnconditionally out of 2010-05-28 16:19:17 +00:00
LoopDependenceAnalysis.h Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 2010-10-19 17:21:58 +00:00
LoopInfo.h Simplify more DenseMap.find users. 2012-01-04 21:41:24 +00:00
LoopIterator.h Cleanup. Remove an extraneous GraphTraits specialization. 2011-08-10 22:55:39 +00:00
LoopPass.h Reapply r138695. Fix PassManager stack depths. 2011-08-29 17:07:00 +00:00
MemoryBuiltins.h land David Blaikie's patch to de-constify Type, with a few tweaks. 2011-07-18 04:54:35 +00:00
MemoryDependenceAnalysis.h Refactor capture tracking (which already had a couple flags for whether returns 2011-11-14 22:49:42 +00:00
Passes.h The ARC language-specific optimizer. Credit to Dan Gohman. 2011-06-15 23:37:01 +00:00
PathNumbering.h Implementation of path profiling. 2011-01-29 01:09:53 +00:00
PathProfileInfo.h Remove unused STL header includes. 2011-04-23 19:53:52 +00:00
PHITransAddr.h Propagate TargetLibraryInfo throughout ConstantFolding.cpp and 2011-12-01 03:08:23 +00:00
PostDominators.h remove postdom frontiers, because it is dead. Forward dom frontiers are 2011-04-05 21:57:17 +00:00
ProfileInfo.h Convert debug messages to use dbgs(). Generally this means 2009-12-23 17:55:11 +00:00
ProfileInfoLoader.h
ProfileInfoTypes.h This is #included by .c files. Remove C++-style comments. 2011-01-29 21:54:26 +00:00
RegionInfo.h Missed some users of Value::getNameStr. 2011-11-15 18:30:06 +00:00
RegionIterator.h Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
RegionPass.h Reapply r138695. Fix PassManager stack depths. 2011-08-29 17:07:00 +00:00
RegionPrinter.h Add new RegionInfo pass. 2010-07-22 07:46:31 +00:00
ScalarEvolution.h Clarified the SCEV getSmallConstantTripCount interface with in-your-face comments. 2012-01-11 06:52:55 +00:00
ScalarEvolutionExpander.h SCEVExpander fixes. Affects LSR and indvars. 2012-01-20 07:41:13 +00:00
ScalarEvolutionExpressions.h land David Blaikie's patch to de-constify Type, with a few tweaks. 2011-07-18 04:54:35 +00:00
ScalarEvolutionNormalization.h Generalize IVUsers to track arbitrary expressions rather than expressions 2010-04-07 22:27:08 +00:00
SparsePropagation.h Eliminate unnecessary LLVMContexts. 2009-12-18 23:42:08 +00:00
Trace.h
ValueTracking.h Revert Chris' commits up to r149348 that started causing VMCoreTests unit test to fail. 2012-02-01 04:51:17 +00:00
Verifier.h Fix a comment. 2010-04-08 17:41:04 +00:00