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path: root/lib/Analysis/BasicAliasAnalysis.cpp
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2011-01-18Teach BasicAA to return PartialAlias in cases where both pointersDan Gohman
are pointing to the same object, one pointer is accessing the entire object, and the other is access has a non-zero size. This prevents TBAA from kicking in and saying NoAlias in such cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123775 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03fix rdar://8813415 - a miscompilation of 164.gzip that loop-idiomChris Lattner
exposed. It turns out to be a latent bug in basicaa, scary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122772 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-15Reapply r121886, and also update DecomposeGEPExpression to keepDan Gohman
it in sync. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121895 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-15Move Value::getUnderlyingObject to be a standaloneDan Gohman
function so that it can live in Analysis instead of VMCore. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121885 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-13Reapply r121520, PartialAlias implementation for BasicAA, now thatDan Gohman
memdep is updated to handle it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121725 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-10Revert r121520, which may have introduced miscompilations.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121573 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-10Implement PartialAlias checking in BasicAA.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121520 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-07PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() andJay Foad
zextOrTrunc(), and APSInt methods extend(), extOrTrunc() and new method trunc(), to be const and to return a new value instead of modifying the object in place. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121120 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-30enhance basicaa to return "Mod" for a memcpy call when theChris Lattner
queried location doesn't overlap the source, and add a testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120370 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-30Teach basicaa that memset's modref set is at worst "mod" and neverChris Lattner
contains "ref". Enhance DSE to use a modref query instead of a store-specific hack to generalize the "ignore may-alias stores" optimization to handle memset and memcpy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120368 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-10Make ModRefBehavior a lattice. Use this to clean up AliasAnalysisDan Gohman
chaining and simplify FunctionAttrs' GetModRefBehavior logic. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118660 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-08Re-introduce the MaxLookup limit to BasicAliasAnalysis'Dan Gohman
pointsToConstantMemory code to guard against possible compile time slowdowns. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118440 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-08Extend the AliasAnalysis::pointsToConstantMemory interface to allow itDan Gohman
to optionally look for constant or local (alloca) memory. Teach BasicAliasAnalysis::pointsToConstantMemory to look through Select and Phi nodes, and to support looking for local memory. Remove FunctionAttrs' PointsToLocalOrConstantMemory function, now that AliasAnalysis knows all the tricks that it knew. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118412 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-08Teach BasicAliasAnalysis::getModRefBehavior(const Function *F)Dan Gohman
to analyze intrinsic functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118409 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-19Move NoAA out of BasicAliasAnalysis.cpp into its own file, now thatDan Gohman
it doesn't have a special relationship with BasicAliasAnalysis anymore. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116876 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-19Reapply r116831 and r116839, converting AliasAnalysis to useDan Gohman
uint64_t, plus fixes for places I missed before. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116875 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-19Revert r116831 and r116839, which are breaking selfhost builds.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116858 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-19Change AliasAnalysis and its clients to use uint64_t instead of unsignedDan Gohman
for representing object sizes, for consistency with other parts of LLVM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116831 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-19Get rid of static constructors for pass registration. Instead, every pass ↵Owen Anderson
exposes an initializeMyPassFunction(), which must be called in the pass's constructor. This function uses static dependency declarations to recursively initialize the pass's dependencies. Clients that only create passes through the createFooPass() APIs will require no changes. Clients that want to use the CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h before parsing commandline arguments. I have tested this with all standard configurations of clang and llvm-gcc on Darwin. It is possible that there are problems with the static dependencies that will only be visible with non-standard options. If you encounter any crash in pass registration/creation, please send the testcase to me directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116820 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-18Fix BasicAA to pass TBAAInfo through to the chained analysis.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116730 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-18Make BasicAliasAnalysis a normal AliasAnalysis implementation whichDan Gohman
does normal initialization and normal chaining. Change the default AliasAnalysis implementation to NoAlias. Update StandardCompileOpts.h and friends to explicitly request BasicAliasAnalysis. Update tests to explicitly request -basicaa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116720 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-07Now with fewer extraneous semicolons!Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115996 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-15PR7959: Handle negative scales in GEPs correctly in BasicAA for non-64-bitEli Friedman
targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114015 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-14Remove the experimental AliasAnalysis::getDependency interface, whichDan Gohman
isn't a good level of abstraction for memdep. Instead, generalize AliasAnalysis::alias and related interfaces with a new Location class for describing a memory location. For now, this is the same Pointer and Size as before, plus an additional field for a TBAA tag. Also, introduce a fixed MD_tbaa metadata tag kind. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113858 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-09Extend the getDependence query with support for PHI translation.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113521 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-08Add a new experimental generalized dependence query interface toDan Gohman
AliasAnalysis, and some code for implementing the new query on top of existing implementations by making standard alias and getModRefInfo queries. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113329 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18refix PR1143 by making basicaa analyze zexts of indices aggresively,Chris Lattner
which I broke with a recent patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111452 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18GetLinearExpression is only called when TD is non-null, pass as Chris Lattner
a reference instead of pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111445 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18rework GEP decomposition to make a new VariableGEPIndex struct instead ofChris Lattner
using a pair. This tidies up the code a bit. While setting things up, add a (currently unused) field to keep track of how the value is extended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111444 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18move gep decomposition out of ValueTracking into BasicAA. The form ofChris Lattner
decomposition that it is doing is very basicaa specific and is only used by basicaa. Now with less tree breakingness. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111433 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18Revert r111375, "move gep decomposition out of ValueTracking into BasicAA. TheDaniel Dunbar
form of", it doesn't pass tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111385 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18move gep decomposition out of ValueTracking into BasicAA. The form ofChris Lattner
decomposition that it is doing is very basicaa specific and is only used by basicaa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111375 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
2010-08-06Move all the logic for function attributes and call attributes out of theDan Gohman
AliasAnalysis base class and into BasicAliasAnalyais. This avoids confusion about where such logic is happening when there are other AliasAnalysis implementations present. Move the logic for translating two-callsite getModRefInfo queries into other AliasAnalysis queries out of BasicAliasAnalysis and into the AliasAnalysis base class, as it is useful for other AliasAnalysis implementations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110421 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Fix botched revert.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110416 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
2010-08-05Fix 80-column violations.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110401 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
2010-08-05Implement AccessesArguments checking in the two-callsite formDan Gohman
of BasicAA::getModRefInfo. This allows BasicAA to say that two memset calls to non-aliasing memory locations don't interfere. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110393 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Fix memdep's code for reasoning about dependences between two calls. A RefDan Gohman
response from getModRefInfo is not useful here. Instead, check for identical calls only in the NoModRef case. Reapply r110270, and strengthen it to compensate for the memdep changes. When both calls are readonly, there is no dependence between them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110382 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Revert r110270 for now. It appears to uncover a memdep bug.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110293 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04The two-callsite form of AliasAnalysis::getModRefInfo is documentedDan Gohman
to return Ref if the left callsite only reads memory read or written by the right callsite; fix BasicAliasAnalysis to implement this. Add AliasAnalysisEvaluator support for testing the two-callsite form of getModRefInfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110270 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03Thread const correctness through a bunch of AliasAnalysis interfaces andDan Gohman
eliminate several const_casts. Make CallSite implicitly convertible to ImmutableCallSite. Rename the getModRefBehavior for intrinsic IDs to getIntrinsicModRefBehavior to avoid overload ambiguity with CallSite, which happens to be implicitly convertible to bool. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110155 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03The singular of "indices" is "index".Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110135 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03Delete an unused function.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110134 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03Introduce a symbolic constant for ~0u for use with AliasAnalysis.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110091 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-21Add INSTANTIATE_AG_PASS, which combines RegisterPass<> with ↵Owen Anderson
RegisterAnalysisGroup<> for pass registration. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109058 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-20Speculatively revert r108813, in an attempt to get the self-host buildbots ↵Owen Anderson
working again. I don't see why this patch would cause them to fail the way they are, but none of the other intervening patches seem likely either. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108818 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-20Reapply r108794, a fix for the failing test from last time.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108813 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-20Revert r108794, "Separate PassInfo into two classes: a constructor-freeDaniel Dunbar
superclass (StaticPassInfo) and a constructor-ful subclass (PassInfo).", it is breaking teh everything. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108805 91177308-0d34-0410-b5e6-96231b3b80d8
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