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llvm/test/Analysis
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James Molloy bf7b3fed5c [ValueTracking] Extend r251146 to catch a fairly common case 
Even though we may not know the value of the shifter operand, it's possible we know the shifter operand is non-zero. This can allow us to infer more known bits - for example:

  %1 = load %p !range {1, 5}
  %2 = shl %q, %1

We don't know %1, but we do know that it is nonzero so %2[0] is known zero, and importantly %2 is known non-zero.

Calling isKnownNonZero is nontrivially expensive so use an Optional to run it lazily and cache its result.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251294 91177308-0d34-0410-b5e6-96231b3b80d8
2015-10-26 14:10:46 +00:00
..
AssumptionCache [PM] Actually add the new pass manager support for the assumption cache. 2015-01-22 21:53:09 +00:00
BasicAA [BasicAA] Bugfix for r251016 2015-10-23 14:17:03 +00:00
BlockFrequencyInfo Use fixed-point representation for BranchProbability. 2015-09-25 23:09:59 +00:00
BranchProbabilityInfo Use fixed-point representation for BranchProbability. 2015-09-25 23:09:59 +00:00
CallGraph [CallGraph] Given -print-callgraph a stable printing order. 2015-06-19 23:20:31 +00:00
CFLAliasAnalysis [PM/AA] Rebuild LLVM's alias analysis infrastructure in a way compatible 2015-09-09 17:55:00 +00:00
CostModel [CostModel] Fixed AVX integer shift costs 2015-10-17 13:23:38 +00:00
Delinearization [SCEV] Mark AddExprs as nsw or nuw if legal 2015-10-22 19:57:19 +00:00
DemandedBits Compute demanded bits for icmp instructions 2015-10-08 12:40:06 +00:00
DependenceAnalysis [SCEV] Consistently Handle Expressions That Cannot Be Divided 2015-09-10 18:12:47 +00:00
DivergenceAnalysis/NVPTX Divergence analysis for GPU programs 2015-04-10 05:03:50 +00:00
Dominators Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
GlobalsModRef [GlobalsAA] Loosen an overly conservative bailout 2015-10-22 13:44:26 +00:00
LazyCallGraph [LazyCallGraph] Port test case from r240039 to LCG. 2015-07-02 02:03:58 +00:00
Lint [WinEH] Delete the old landingpad implementation of Windows EH 2015-10-09 23:34:53 +00:00
LoopAccessAnalysis [LAA] Fix typo in test 2015-08-11 23:03:09 +00:00
LoopInfo [PM] Port LoopInfo to the new pass manager, adding both a LoopAnalysis 2015-01-20 10:58:50 +00:00
MemoryDependenceAnalysis [MDA] change BlockScanLimit into a command line option. 2015-07-21 21:50:39 +00:00
PostDominators FileCheck-ize tests. 2013-08-22 00:51:19 +00:00
RegionInfo [tests] Cleanup initialization of test suffixes. 2013-08-16 00:37:11 +00:00
ScalarEvolution [SCEV] Commute zero extends through <nuw> additions 2015-10-22 19:57:38 +00:00
ScopedNoAliasAA [Testsuite] Renumber metadata in ScopedNoAliasAA test to match CHECK lines 2015-05-11 09:10:14 +00:00
TypeBasedAliasAnalysis [ARM][NEON] Use address space in vld([1234]|[234]lane) and vst([1234]|[234]lane) instructions 2015-09-30 10:56:37 +00:00
ValueTracking [ValueTracking] Extend r251146 to catch a fairly common case 2015-10-26 14:10:46 +00:00