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path: root/lib/Analysis/ScalarEvolution.cpp
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2010-08-13Various optimizations. Don't compare two loops' depthsDan Gohman
when they are the same loop. Don't compare two instructions' loop depths when they are in the same block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111045 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-13When testing whether one loop contains another, test this directlyDan Gohman
rather than testing whether the loop contains the other's header. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111039 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-13Add a const.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111038 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-13When creating a symmetric SCEV with a constant operand, putDan Gohman
the constant operand on the left, as that's where ScalarEvolution will end up canonicalizing to. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111037 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-13An add recurrence is loop-invariant in any loop inside of itsDan Gohman
associated loop. This avoids potentially expensive traversals of the add recurrence's operands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111034 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-12Optimize ScalarEvolution::getAddExpr's operand factoring code byDan Gohman
having it finish processing all of the muliply operands before starting the whole getAddExpr process over again, instead of immediately after the first simplification. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110916 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-12Hoist some loop-invariant code out of a hot loop.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110915 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-12Optimize ScalarEvolution::getAddExpr's duplicate operand detectionDan Gohman
by having it finish processing the whole operand list before starting the whole getAddExpr process over again, instead of immediately after the first duplicate is found. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110914 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-11When analyzing loop exit conditions combined with and and or, don'tDan Gohman
make any assumptions about when the two conditions will agree on when to permit the loop to exit. This fixes PR7845. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110758 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Rename and reorder the arguments to isImpliedCond, for consistency and clarity.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110750 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Reapply r110396, with fixes to appease the Linux buildbot gods.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Revert r110396 to fix buildbots.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Don't use PassInfo* as a type identifier for passes. Instead, use the ↵Owen Anderson
address of the static ID member as the sole unique type identifier. Clean up APIs related to this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04Fix a minor bug which resulted in intermediate calculationsDan Gohman
using wider types than are necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110241 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-02Make SCEVUnknown a CallbackVH, so that it can be notified directlyDan Gohman
of Value deletions and RAUWs, instead of relying on ScalarEvolution's Scalars map being notified, as that's complicated at best, and insufficient in general. This means SCEVUnknown needs a non-trivial destructor, so introduce a mechanism to allow ScalarEvolution to locate all the SCEVUnknowns. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110086 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-02Prefix `next' iterator operation with `llvm::'.Oscar Fuentes
Fixes potential ambiguity problems on VS 2010. Patch by nobled! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110029 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-29Speculatively revert r109705 since it seems to be causing some build botEric Christopher
angst. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109718 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-29Factor out some of the code for updating old SCEVUnknown values, andDan Gohman
extend it to handle the case where multiple RAUWs affect a single SCEVUnknown. Add a ScalarEvolution unittest to test for this situation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109705 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-28Make SCEVCallbackVH::allUsesReplacedWith update the old SCEVUnknownDan Gohman
object, as it may still be referenced by SCEVs not cleaned up by the use list traversal. Also, in ScalarEvolution::forgetValue, only check for a SCEVUnknown object for the original value, not for any value in the use list, because other SCEVUnknown values aren't necessary obsolete at that point. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109570 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-28Make SCEVCallbackVH::allUsesReplacedWith unconditionally deleteDan Gohman
the old value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109567 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-23Micro-optimize SCEVComplexityCompare.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109267 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-23Add a const qualifier.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109266 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-22mass elimination of reliance on automatic iterator dereferencingGabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109103 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-21Fix batch of converting RegisterPass<> to INTIALIZE_PASS().Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109045 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-20Add a fast path for x - x.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108855 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15Teach ScalarEvolution how to fold trunc(undef) and anyext(undef) to undef.Dan Gohman
This helps LSR behave more consistently on bugpoint-reduced testcases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108451 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-30In ScalarEvolution::forgetValue, eliminate any SCEVUnknownDan Gohman
entries associated with the value being erased in the folding set map. These entries used to be harmless, because a SCEVUnknown doesn't store any information about its Value*, so having a new Value allocated at the old Value's address wasn't a problem. But now that ScalarEvolution is storing more information about values, this is no longer safe. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107316 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-30Revert the part of r107257 which introduced new logic for usingDan Gohman
nsw and nuw flags from IR Instructions. On further consideration, this isn't valid. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107298 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-30Improve ScalarEvolution's nsw and nuw preservation.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107257 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-30When computing a new ConservativeResult, intersect it withDan Gohman
the old one instead of replacing it, to be more precise. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107256 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-29Fix ScalarEvolution's tripcount computation for chains of loopsDan Gohman
where each loop's induction variable's start value is the exit value of a preceding loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107224 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-29Just as its not safe to blindly transfer the nsw bit from an addDan Gohman
instruction to an add scev, it's not safe to blindly transfer the inbounds flag from a gep instruction to an nsw on the scev for the gep. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107117 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-25Eliminate a redundant FoldingSet lookup.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106872 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Don't try to preserve pointer types in SCEVConstants; the old codeDan Gohman
was over-complicated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106760 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Make the trunc code consistent with the zext and sext code in itsDan Gohman
handling of pointer types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106757 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-22Replace ScalarEvolution's private copy of getLoopPredecessorDan Gohman
with LoopInfo's public copy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106603 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-22Allow "exhaustive" trip count evaluation on phi nodes with allDan Gohman
constant operands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106537 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-21Use A.append(...) instead of A.insert(A.end(), ...) when A is aDan Gohman
SmallVector, and other SmallVector simplifications. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106452 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-19Fix ScalarEvolution's "exhaustive" trip count evaluation code to avoidDan Gohman
assuming that loops are in canonical form, as ScalarEvolution doesn't depend on LoopSimplify itself. Also, with indirectbr not all loops can be simplified. This fixes PR7416. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106389 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-18Revert r106304 (105548 and friends), which are the SCEVComplexityCompareDan Gohman
optimizations. There is still some nondeterminism remaining. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106306 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-18Reapply 105540, 105542, and 105548, and revert r105732.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106304 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-18Reapply 105546.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106302 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-18Reapply 105544.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106301 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-18Remove getIntegerSCEV; it's redundant with getConstant, and getConstantDan Gohman
is more consistent with the ConstantInt API. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106281 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-17Simplify this code.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106254 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-09Revert 105540, 105542, 105544, 105546, and 105548 to unbreak bootstrapping.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105740 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-07The FoldingSet hash data includes pointer values, so it isn'tDan Gohman
determinstic. Instead, give SCEV objects an arbitrary sequence number. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105548 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-07Optimize this code somewhat by taking advantage of the factDan Gohman
that the operands are sorted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105546 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-07Micro-optimize this, to speed up this hotspot in debug builds a little.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105544 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-07Micro-optimize this.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105542 91177308-0d34-0410-b5e6-96231b3b80d8
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