Andrea Di Biagio 44926033f6 [TTI] Teach the cost heuristic how to query TLI to check if a zext/trunc is 'free' for the target. ... Now that SimplifyCFG uses TTI for the cost heuristic, we can teach BasicTTIImpl how to query TLI in order to get a more accurate cost for truncates and zero-extends. Before this patch, the basic cost heuristic in TargetTransformInfoImplCRTPBase would have conservatively returned a 'default' TCC_Basic for all zero-extends, and TCC_Free for truncates on native types. This patch improves the heuristic so that we query TLI (if available) to get more accurate answers. If TLI is available, then methods 'isZExtFree' and 'isTruncateFree' can be used to check if a zext/trunc is free for the target. Added more test cases to SimplifyCFG/X86/speculate-cttz-ctlz.ll. With this change, SimplifyCFG is now able to speculate a 'cheap' cttz/ctlz immediately followed by a free zext/trunc. Differential Revision: http://reviews.llvm.org/D7585 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228923 91177308-0d34-0410-b5e6-96231b3b80d8		2015-02-12 14:17:24 +00:00
..
AliasAnalysis.h	Sink store based on alias analysis	2014-12-15 14:09:53 +00:00
AliasSetTracker.h	AliasSetTracker: UnknownInsts should contribute to the refcount	2014-11-19 09:41:05 +00:00
AssumptionCache.h	[PM] Actually add the new pass manager support for the assumption cache.	2015-01-22 21:53:09 +00:00
BlockFrequencyInfo.h
BlockFrequencyInfoImpl.h	Fix typo in comment	2014-10-08 23:30:45 +00:00
BranchProbabilityInfo.h	[stack protector] Set edge weights for newly created basic blocks.	2014-12-01 04:27:03 +00:00
CallGraph.h	Fix GraphTraits for "const CallGraphNode *" and "const CallGraph *"	2014-11-17 17:51:45 +00:00
CallGraphSCCPass.h
CallPrinter.h
CaptureTracking.h
CFG.h
CFGPrinter.h
CGSCCPassManager.h	[cleanup] Re-sort all the #include lines in LLVM using	2015-01-14 11:23:27 +00:00
CodeMetrics.h	[PM] Split the AssumptionTracker immutable pass into two separate APIs:	2015-01-04 12:03:27 +00:00
ConstantFolding.h
ConstantsScanner.h
DependenceAnalysis.h	[DependenceAnalysis] Allow subscripts of different types	2014-11-16 16:52:44 +00:00
DominanceFrontier.h	These functions are not actually defined for NDEBUG or !LLVM_DUMP_ENABLED, so guarding the declarations as well. NFC, silences MSVC warnings in release builds.	2014-10-24 15:16:39 +00:00
DominanceFrontierImpl.h	Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>	2014-11-19 07:49:26 +00:00
DomPrinter.h
DOTGraphTraitsPass.h	Modernize raw_fd_ostream's constructor a bit.	2014-08-25 18:16:47 +00:00
InlineCost.h	[multiversion] Thread a function argument through all the callers of the	2015-02-01 12:01:35 +00:00
InstructionSimplify.h	[InstSimplify] Add SimplifyFPBinOp function.	2015-02-06 20:02:51 +00:00
Interval.h
IntervalIterator.h	Reduce double set lookups. NFC.	2014-10-10 15:32:50 +00:00
IntervalPartition.h
IVUsers.h
JumpInstrTableInfo.h	[cleanup] Re-sort all the #include lines in LLVM using	2015-01-14 11:23:27 +00:00
LazyCallGraph.h	Revert r225854: [PM] Move the LazyCallGraph printing functionality to	2015-01-14 00:27:45 +00:00
LazyValueInfo.h	remove function names from comments; NFC	2015-01-08 22:36:56 +00:00
LibCallAliasAnalysis.h
LibCallSemantics.h	Don't promote asynch EH invokes of nounwind functions to calls	2015-02-11 01:23:16 +00:00
Lint.h
Loads.h
LoopAccessAnalysis.h	[LV] Move addRuntimeCheck to LoopAccessAnalysis	2015-02-06 18:31:04 +00:00
LoopInfo.h	[PM] Don't spend time making self moves no-ops. They're allowed to leave	2015-01-20 18:54:16 +00:00
LoopInfoImpl.h	[PM] Now that LoopInfo isn't in the Pass type hierarchy, it is much	2015-01-18 01:25:51 +00:00
LoopIterator.h
LoopPass.h	Fix assertion in LICM doFinalization()	2014-09-24 16:48:31 +00:00
MemoryBuiltins.h
MemoryDependenceAnalysis.h	Pass QueryInst down through non-local dependency calculation	2015-01-26 18:39:52 +00:00
Passes.h	Introduce print-memderefs to test isDereferenceablePointer	2015-02-06 01:46:42 +00:00
PHITransAddr.h	[PM] Split the AssumptionTracker immutable pass into two separate APIs:	2015-01-04 12:03:27 +00:00
PostDominators.h	Fix typos in comments, NFC	2014-08-29 21:53:01 +00:00
PtrUseVisitor.h
RegionInfo.h	These functions are not actually defined for NDEBUG or !LLVM_DUMP_ENABLED, so guarding the declarations as well. NFC, silences MSVC warnings in release builds.	2014-10-24 15:16:39 +00:00
RegionInfoImpl.h	[cleanup] Re-sort all the #include lines in LLVM using	2015-01-14 11:23:27 +00:00
RegionIterator.h
RegionPass.h
RegionPrinter.h
ScalarEvolution.h	Address post-commit review for rL228587: make it explicit that the	2015-02-09 19:39:00 +00:00
ScalarEvolutionExpander.h
ScalarEvolutionExpressions.h	[cleanup] Re-sort all the #include lines in LLVM using	2015-01-14 11:23:27 +00:00
ScalarEvolutionNormalization.h
SparsePropagation.h
TargetFolder.h
TargetLibraryInfo.h	[PM] Rework how the TargetLibraryInfo pass integrates with the new pass	2015-01-24 02:06:09 +00:00
TargetTransformInfo.h	Use estimated number of optimized insns in unroll-threshold computation.	2015-02-06 20:20:40 +00:00
TargetTransformInfoImpl.h	[TTI] Teach the cost heuristic how to query TLI to check if a zext/trunc is 'free' for the target.	2015-02-12 14:17:24 +00:00
Trace.h
ValueTracking.h	Fold fcmp in cases where value is provably non-negative. By Arch Robison.	2015-01-28 08:03:58 +00:00