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2009-11-22Remove the AliasAnalysis::getMustAliases method, which is dead.Chris Lattner
The hasNoModRefInfoForCalls isn't worth it as a filter because basicaa provides m/r info and everything chains to it, so remove it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89599 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-22Remove dead code. While there, also turn a few 'T* ' into 'T *' to match theNick Lewycky
rest of the file. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89577 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20Use stripPointerCasts(). Thanks Duncan!Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89472 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20Revert the rule that considers comparisons between two pointers in theDan Gohman
same object to be a non-capture; Duncan pointed out a way that such a comparison could be a capture. Make the rule that considers a comparison against null more specific, and only consider noalias return values compared against null. This still supports test/Transforms/GVN/nonescaping-malloc.ll, and is not susceptible to the problem Duncan pointed out with noalias arguments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89468 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20Simplify this code; it's not necessary to check isIdentifiedObject hereDan Gohman
because if the results from getUnderlyingObject match, the values must be from the same underlying object, even if we don't know what that object is. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89434 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20Teach getSmallConstantTripMultiple about Shl operators.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89426 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20Refine the capture tracking rules for comparisons to be moreDan Gohman
careful about crazy methods of capturing pointers using comparisons. Comparisons of identified objects with null in the default address space are not captures. And, comparisons of two pointers within the same identified object are not captures. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89421 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20Use isVoidTy().Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89419 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-19Refine this to only apply to null in the default address space.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89411 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-19Extend CaptureTracking to indicate when a value is never stored, evenDan Gohman
if it is not ultimately captured. Teach BasicAliasAnalysis that a local object address which does not escape and is never stored does not alias with a value resulting from a load. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89398 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-19Comparing a pointer with null is not a capture.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89389 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-19Teach IVUsers to keep things simpler and track loop-invariant strides onlyJim Grosbach
for uses inside the loop. This works better with LSR. Disabled behind -simplify-iv-users while benchmarking. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89299 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-18Simplify ComputeMultiple so that it doesn't depend on TargetData.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89175 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-17Remove dead code.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89156 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-16typo spotted by duncan.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88884 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-15teach LVI to infer edge information from switch instructions.Chris Lattner
This allows JT to eliminate a ton of infeasible edges when handling code like the templates in PatternMatch.h git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88869 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-15fix a logic error that would cause LVI-JT to miscompileChris Lattner
some conditionals git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88868 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-15implement the first stab at caching queries. This isn't correctChris Lattner
(because the invalidation logic is missing) but LVI isn't enabled by default anyway. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88867 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-15refactor a bunch of code forming the new LazyValueInfoCacheChris Lattner
and LVIQuery classes, no functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88866 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-14Teach BasicAA that a constant expression can't alias memory provably notNick Lewycky
allocated until runtime (such as an alloca). Patch by Hans Wennborg! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88760 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-13Revert r87059 for now. It is failing clang tests.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87070 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-13Remove unnecessary llvm.dbg.declare bitcastVictor Hernandez
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87059 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-12"Attach debug info with llvm instructions" mode was enabled a month ago. Now ↵Devang Patel
make it permanent and remove old way of inserting intrinsics to encode debug info for line number and scopes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87014 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-12- Teach LSR to avoid changing cmp iv stride if it will create an immediate thatEvan Cheng
cannot be folded into target cmp instruction. - Avoid a phase ordering issue where early cmp optimization would prevent the later count-to-zero optimization. - Add missing checks which could cause LSR to reuse stride that does not have users. - Fix a bug in count-to-zero optimization code which failed to find the pre-inc iv's phi node. - Remove, tighten, loosen some incorrect checks disable valid transformations. - Quite a bit of code clean up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86969 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-12various fixes to the lattice transfer functions.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86952 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-12Add a new getPredicateOnEdge method which returns more rich information forChris Lattner
constant constraints. Improve the LVI lattice to include inequality constraints. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86950 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-12expose edge information and switch j-t to use it.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86920 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-12move some stuff into DEBUG's and turn on lazy-value-info forChris Lattner
the basic.ll testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86918 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-12Do not use StringRef in DebugInfo interface. Devang Patel
This allows StringRef to skip controversial if(str) check in constructor. Buildbots, wait for corresponding clang and llvm-gcc FE check-ins! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86914 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-11make LazyValueInfo actually to some stuff. This isn't very tested but improvesChris Lattner
strswitch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86889 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-11stub out some LazyValueInfo interfaces, and have JumpThreadingChris Lattner
start using them in a trivial way when -enable-jump-threading-lvi is passed. enable-jump-threading-lvi will be my playground for awhile. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86789 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-11Stub out a new lazy value info pass, which will eventuallyChris Lattner
vend value constraint information to the optimizer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86767 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-11remove redundant foward declaration. This function is already in Chris Lattner
Analysis/Passes.h git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86765 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10Implement support to debug inlined functions.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86748 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10move some generally useful functions out of jump threadingChris Lattner
into libanalysis and transformutils. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86735 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10Process InlinedAt location info.Devang Patel
Update InsertDeclare to return newly inserted llvm.dbg.declare intrinsic. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86727 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10Update computeArraySize() to use ComputeMultiple() to determine the array ↵Victor Hernandez
size associated with a malloc; also extend PerformHeapAllocSRoA() to check if the optimized malloc's arg had its highest bit set, so that it is safe for ComputeMultiple() to look through sext instructions while determining the optimized malloc's array size git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86676 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10Add ComputeMultiple() analysis function that recursively determines if a ↵Victor Hernandez
Value V is a multiple of unsigned Base git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86675 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10I misread the parens, not so redundant after all.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86648 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10remove some redundant parens.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86645 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10add a new SimplifyInstruction API, which is like ConstantFoldInstruction, Chris Lattner
except that the result may not be a constant. Switch jump threading to use it so that it gets things like (X & 0) -> 0, which occur when phi preds are deleted and the remaining phi pred was a zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86637 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10Fix DenseMap iterator constness.Jeffrey Yasskin
This patch forbids implicit conversion of DenseMap::const_iterator to DenseMap::iterator which was possible because DenseMapIterator inherited (publicly) from DenseMapConstIterator. Conversion the other way around is now allowed as one may expect. The template DenseMapConstIterator is removed and the template parameter IsConst which specifies whether the iterator is constant is added to DenseMapIterator. Actually IsConst parameter is not necessary since the constness can be determined from KeyT but this is not relevant to the fix and can be addressed later. Patch by Victor Zverovich! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86636 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10factor simplification logic for AND and OR out to InstSimplify from instcombine.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86635 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09pull a bunch of logic out of instcombine into instsimplify for compare Chris Lattner
simplification, this handles the foldable fcmp x,x cases among many others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86627 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
2009-11-09rename SimplifyCompare -> SimplifyCmpInst and split it into Chris Lattner
Simplify[IF]Cmp pieces. Add some predicates to CmpInst to determine whether a predicate is fp or int. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86624 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
2009-11-09stub out a new libanalysis "instruction simplify" interface thatChris Lattner
takes decimated instructions and applies identities to them. This is pretty minimal at this point, but I plan to pull some instcombine logic out into these and similar routines. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86613 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09Default-addressspace null pointers don't alias anything. This allowsDan Gohman
GVN to be more aggressive. Patch by Hans Wennborg! (with a comment added by me) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86582 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09Minor tidiness fixes.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86565 91177308-0d34-0410-b5e6-96231b3b80d8
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