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Move delinearization from SCEVAddRecExpr to ScalarEvolution

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The expressions we delinearize do not necessarily have to have a SCEVAddRecExpr
at the outermost level. At this moment, the additional flexibility  is not
exploited in LLVM itself, but in Polly we will soon soonish use this
functionality. For LLVM, this change should not affect existing functionality
(which is covered by test/Analysis/Delinearization/)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240952 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tobias Grosser
2015-06-29 14:42:48 +00:00
parent 9a6c902332
commit 032d56baf2
5 changed files with 105 additions and 99 deletions
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8
lib/Analysis/DependenceAnalysis.cpp
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@ -3266,8 +3266,8 @@ bool DependenceAnalysis::tryDelinearize(const SCEV *SrcSCEV,
// First step: collect parametric terms in both array references.
SmallVector<const SCEV *, 4> Terms;
SrcAR->collectParametricTerms(*SE, Terms);
DstAR->collectParametricTerms(*SE, Terms);
SE->collectParametricTerms(SrcAR, Terms);
SE->collectParametricTerms(DstAR, Terms);
// Second step: find subscript sizes.
SmallVector<const SCEV *, 4> Sizes;
@ -3275,8 +3275,8 @@ bool DependenceAnalysis::tryDelinearize(const SCEV *SrcSCEV,
// Third step: compute the access functions for each subscript.
SmallVector<const SCEV *, 4> SrcSubscripts, DstSubscripts;
SrcAR->computeAccessFunctions(*SE, SrcSubscripts, Sizes);
DstAR->computeAccessFunctions(*SE, DstSubscripts, Sizes);
SE->computeAccessFunctions(SrcAR, SrcSubscripts, Sizes);
SE->computeAccessFunctions(DstAR, DstSubscripts, Sizes);
// Fail when there is only a subscript: that's a linearized access function.
if (SrcSubscripts.size() < 2 || DstSubscripts.size() < 2 ||