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Bjarke Hammersholt Roune 9791ed4705 [SCEV] Apply NSW and NUW flags via poison value analysis for sub, mul and shl 
Summary:
http://reviews.llvm.org/D11212 made Scalar Evolution able to propagate NSW and NUW flags from instructions to SCEVs for add instructions. This patch expands that to sub, mul and shl instructions.

This change makes LSR able to generate pointer induction variables for loops like these, where the index is 32 bit and the pointer is 64 bit:

  for (int i = 0; i < numIterations; ++i)
    sum += ptr[i - offset];

  for (int i = 0; i < numIterations; ++i)
    sum += ptr[i * stride];

  for (int i = 0; i < numIterations; ++i)
    sum += ptr[3 * (i << 7)];


Reviewers: atrick, sanjoy

Subscribers: sanjoy, majnemer, hfinkel, llvm-commits, meheff, jingyue, eliben

Differential Revision: http://reviews.llvm.org/D11860

llvm-svn: 245118
 		2015-08-14 22:45:26 +00:00
..
AssumptionCache [PM] Actually add the new pass manager support for the assumption cache. 2015-01-22 21:53:09 +00:00
BasicAA Emit argmemonly attribute for intrinsics. 2015-08-13 17:40:04 +00:00
BlockFrequencyInfo Add documentation for new backedge mass propagation in irregular loops. 2015-06-17 16:28:22 +00:00
BranchProbabilityInfo Fix information loss in branch probability computation. 2015-05-07 17:22:06 +00:00
CFLAliasAnalysis [opaque pointer type] Add textual IR support for explicit type parameter to gep operator 2015-03-13 18:20:45 +00:00
CallGraph [CallGraph] Given -print-callgraph a stable printing order. 2015-06-19 23:20:31 +00:00
CostModel [X86][SSE] Vectorize i64 ASHR operations 2015-07-29 20:31:45 +00:00
Delinearization [SCEV] Apply NSW and NUW flags via poison value analysis for sub, mul and shl 2015-08-14 22:45:26 +00:00
DependenceAnalysis [DependenceAnalysis] Extend unifySubscriptType for handling coupled subscript groups. 2015-05-29 16:58:08 +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 [GMR] Be a bit smarter about which globals don't alias when doing recursive lookups 2015-08-11 08:06:44 +00:00
LazyCallGraph [LazyCallGraph] Port test case from r240039 to LCG. 2015-07-02 02:03:58 +00:00
Lint Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +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] Apply NSW and NUW flags via poison value analysis for sub, mul and shl 2015-08-14 22:45:26 +00:00
ScopedNoAliasAA [Testsuite] Renumber metadata in ScopedNoAliasAA test to match CHECK lines 2015-05-11 09:10:14 +00:00
TypeBasedAliasAnalysis Emit argmemonly attribute for intrinsics. 2015-08-13 17:40:04 +00:00
ValueTracking [ValueTracking] do not overwrite analysis results already computed 2015-06-15 05:46:29 +00:00