aboutsummaryrefslogtreecommitdiff
path: root/lib/Analysis/ScalarEvolution.cpp
AgeCommit message (Collapse)Author
2010-01-21Re-implement the main strength-reduction portion of LoopStrengthReduction.Dan Gohman
This new version is much more aggressive about doing "full" reduction in cases where it reduces register pressure, and also more aggressive about rewriting induction variables to count down (or up) to zero when doing so reduces register pressure. It currently uses fairly simplistic algorithms for finding reuse opportunities, but it introduces a new framework allows it to combine multiple strategies at once to form hybrid solutions, instead of doing all full-reduction or all base+index. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94061 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-19Add a comment and tidy up some whitespace.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93932 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-19Give ScalarEvolution access to the DominatorTree. It'll need thisDan Gohman
to make more intellegent AddRec folding decisions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93930 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-09Use WriteAsOperand instead of getName() to print loop header names,Dan Gohman
so that unnamed blocks are handled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93059 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-23Remove dump routine and the associated Debug.h from a header. Patch upDavid Greene
other files to compensate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92075 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-23Convert debug messages to use dbgs(). Generally this meansDavid Greene
s/errs/dbgs/g except for certain special cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92067 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-19Fix a spello in a comment that Nick spotted.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91742 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Make this comment more precise.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91722 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Revert this use of NUW/NSW also. Overflow-undefined multiplication isn'tDan Gohman
associative either. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91701 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Revert this use of NSW; this one isn't actually safe. NSW additionDan Gohman
is not reassociative. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91667 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Delete an unused variable.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91659 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Preserve NSW information in more places.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91656 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Add Loop contains utility methods for testing whether a loopDan Gohman
contains another loop, or an instruction. The loop form is substantially more efficient on large loops than the typical code it replaces. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91654 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-18Whitespace cleanups.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91651 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23Remove dead LLVMContext argument.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89641 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09Pass the (optional) TargetData object to ConstantFoldInstOperandsDan Gohman
and ConstantFoldCompareInstOperands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86626 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09fix ConstantFoldCompareInstOperands to take the LHS/RHS asChris Lattner
individual operands instead of taking a temporary array git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86619 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06remove a bunch of extraneous LLVMContext argumentsChris Lattner
from various APIs, addressing PR5325. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86231 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-01Reverting 85714, 85715, 85716, which are breaking the buildDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85717 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-01Add a function to Passes.h to allow clients to create instancesDan Gohman
of the ScalarEvolution pass without needing to #include ScalarEvolution.h. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85716 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-31Rename forgetLoopBackedgeTakenCount to forgetLoop, because itDan Gohman
clears out more information than just the stored backedge taken count. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85664 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-25Remove includes of Support/Compiler.h that are no longer needed after theNick Lewycky
VISIBILITY_HIDDEN removal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85043 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-25Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces.Nick Lewycky
Chris claims we should never have visibility_hidden inside any .cpp file but that's still not true even after this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85042 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-09Revert r83606 and add comments explaining why it isn't safe.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83649 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-09Preserve HasNSW and HasNUW when constructing SCEVs for Add and MulDan Gohman
instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83606 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-09Add the ability to track HasNSW and HasNUW on more kinds of SCEV expressions.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83601 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-27Add a properlyDominates member function to ScalarEvolution.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82898 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-17Teach ScalarEvolution how to reason about no-wrap flags on loopsDan Gohman
where the induction variable has a non-unit stride, such as {0,+,2}, and there are expressions such as {1,+,2} inside the loop formed with or or add nsw operators. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82151 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-03Remove references to expression "handles", which are no longer used.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80918 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-31Don't use an iterator which is potentially invalidated.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80632 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-31Extend the ValuesAtScope cache to cover all expressions, not justDan Gohman
SCEVUnknowns, as the non-SCEVUnknown cases in the getSCEVAtScope code can also end up repeatedly climing through the same expression trees, which can be unusably slow when the trees are very tall. Also, add a quick check for SCEV pointer equality to the main SCEV comparison routine, as the full comparison code can be expensive in the case of large expression trees. These fix compile-time problems in some pathlogical cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80623 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-25Don't assume that two identical instructions that read from memoryDan Gohman
will always return the same value. This isn't currently necessary, since this code doesn't currently ever get called under circumstances where it would matter, but it may some day. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80017 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-25Teach ScalarEvolution about GlobalAliases.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80014 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-24remove a few dead insertion methods.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79882 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-23Change Pass::print to take a raw ostream instead of std::ostream,Chris Lattner
update all code that this affects. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79830 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-20Rename hasNoUnsignedOverflow and hasNoSignedOverflow to hasNoUnsignedWrapDan Gohman
and hasNoSignedWrap, for consistency with the nuw and nsw properties. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79539 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-20Various comment and whitespace cleanups.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79533 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-19Use hasDefinitiveInitializer() instead of testing the same thingDan Gohman
by hand, and fix a few places that were using hasInitializer() that appear to depend on the initializer value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79441 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-18Generalize ScalarEvolution to be able to analyze GEPs whenDan Gohman
TargetData is not present. It still uses TargetData when available. This generalization also fixed some limitations in the TargetData case; the attached testcase covers this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79344 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-13Push LLVMContexts through the IntegerType APIs.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78948 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-07Fix copy-pasto.Andreas Bolka
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78426 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-31Move a few more APIs back to 2.5 forms. The only remaining ones left to ↵Owen Anderson
change back are metadata related, which I'm waiting on to avoid conflicting with Devang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77721 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-29Move types back to the 2.5 API.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77516 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-29Move ConstantExpr to 2.5 API.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77494 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-27Fix wording in comments.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77193 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-25SCEV objects are no longer reference-counted.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77080 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-25When attempting to sign-extend an addrec by interpretingDan Gohman
the step value as unsigned, the start value and the addrec itself still need to be treated as signed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77078 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-25Teach ScalarEvolution to make use of no-overflow flags whenDan Gohman
analyzing add recurrences. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77034 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-25Instead of eagerly creating new SCEVs to replace all SCEVs that areDan Gohman
affected after a PHI node has been analyzed, just remove affected SCEVs from the Scalars map, so that they'll be (lazily) recreated as needed. This avoids creating SCEV objects that aren't actually needed. Also, rewrite the associated def-use walking code to be non-recursive and to continue traversing past Instructions that don't have an entry in the Scalars map. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77032 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-24Revert the ConstantInt constructors back to their 2.5 forms where possible, ↵Owen Anderson
thanks to contexts-on-types. More to come. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77011 91177308-0d34-0410-b5e6-96231b3b80d8
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-06-23 15:25:22 +0000