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path: root/lib/Analysis/AliasAnalysis.cpp
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2013-01-31Move isKnownNonNull out of AliasAnalysis.h and into ValueTracking.cpp sinceDan Gohman
it isn't really an AliasAnalysis concept, and ValueTracking has similar things that it could plausibly share code with some day. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174027 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate theManman Ren
reachablity. We conservatively approximate the reachability analysis by saying it is not reachable if there is a single path starting from "From" and the path does not reach "To". rdar://12801584 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171512 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-02Move all of the header files which are involved in modelling the LLVM IRChandler Carruth
into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-19Rename the 'Attributes' class to 'Attribute'. It's going to represent a ↵Bill Wendling
single attribute in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170502 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-03Use the new script to sort the includes of every file under lib.Chandler Carruth
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-09Use the attribute enums to query if a parameter has an attribute.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165550 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-08Move TargetData to DataLayout.Micah Villmow
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165402 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-04Use method to query for NoAlias attribute.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165211 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-29Make MemoryBuiltins aware of TargetLibraryInfo.Benjamin Kramer
This disables malloc-specific optimization when -fno-builtin (or -ffreestanding) is specified. This has been a problem for a long time but became more severe with the recent memory builtin improvements. Since the memory builtin functions are used everywhere, this required passing TLI in many places. This means that functions that now have an optional TLI argument, like RecursivelyDeleteTriviallyDeadFunctions, won't remove dead mallocs anymore if the TLI argument is missing. I've updated most passes to do the right thing. Fixes PR13694 and probably others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162841 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-14Move the capture analysis from MemoryDependencyAnalysis to a more general placeChad Rosier
so that it can be reused in MemCpyOptimizer. This analysis is needed to remove an unnecessary memcpy when returning a struct into a local variable. rdar://11341081 PR12686 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156776 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-25Move isKnownNonNull from private implementation detail of BasicAA to a publicNick Lewycky
function that others can use, next to llvm::isIdentifiedObject. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151446 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-26Enhance alias analysis for atomic instructions a bit. Upgrade a couple ↵Eli Friedman
alias-analysis tests to the new atomic instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140557 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-15Misc analysis passes that need to be aware of atomic load/store.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137650 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-18land David Blaikie's patch to de-constify Type, with a few tweaks.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135375 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-27When analyzing functions known to only access argument pointees,Dan Gohman
only check arguments with pointer types. Update the documentation of IntrReadArgMem reflect this. While here, add support for TBAA tags on intrinsic calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130317 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03Stub out a new updating interface to AliasAnalysis, allowing stateful ↵Owen Anderson
analyses to be informed when a pointer value has potentially become escaping. Implementations can choose to either fall back to conservative responses for that value, or may recompute their analysis to accomodate the change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122777 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-16Make memcpyopt TBAA-aware.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121944 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-30getLocationForDest should work for memset as well.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120380 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-21add "getLocation" method to AliasAnalysis for getting the source andChris Lattner
destination location of a memcpy/memmove. I'm not clear about whether TBAA works on these, so I'm leaving it out for now. Dan, please revisit this when convenient. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119928 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-11Add helper functions for computing the Location of load, store,Dan Gohman
and vaarg instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118845 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-10Add a doesAccessArgPointees helper function, and update code to useDan Gohman
it, and to be consistent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118692 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
2010-11-09Teach AliasAnalysis about AccessesArgumentsReadonly.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118621 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
2010-11-08Delete getIntrinsicModRefBehavior. Clients can just use the normalDan Gohman
getModRefBehavior now, since it now understands intrinsics as well as normal functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118411 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-25Update comments; BasicAA is no longer necessarily the end of the chain.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117268 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-25Reintroduce these asserts, now that BasicAA is a normal AliasAnalysis pass.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117266 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
2010-10-19Consistently use AliasAnalysis::UnknownSize instead of hardcoding ~0u.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116815 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-13Analysis groups need to initialize their default implementations.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116441 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
2010-10-06Hide analysis group registration behind a macro, just like pass registration.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115835 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
2010-08-06Implement a proper getModRefInfo for va_arg.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110458 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Be more conservative in the face of volatile.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110456 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Fix a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110455 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
2010-08-05Yes, we can do better, but this is not the place for it.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110391 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03Remove PointerAccessInfo, which nothing was using.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110167 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
2010-08-03Make AliasAnalysis::getModRefInfo conservative in the face of volatility.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110120 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-07Remove interprocedural-basic-aa and associated code. The AliasAnalysisDan Gohman
interface needs implementations to be consistent, so any code which wants to support different semantics must use a different interface. It's not currently worthwhile to add a new interface for this new concept. Document that AliasAnalysis doesn't support cross-function queries. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107776 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-29Add an Intraprocedural form of BasicAliasAnalysis, which aims toDan Gohman
properly handles instructions and arguments defined in different functions, or across recursive function iterations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107109 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-06Partially address a README by having functionattrs consider calls toDuncan Sands
memcpy, memset and other intrinsics that only access their arguments to be readnone if the intrinsic's arguments all point to local memory. This improves the testcase in the README to readonly, but it could in theory be made readnone, however this would involve more sophisticated analysis that looks through the memcpy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92829 91177308-0d34-0410-b5e6-96231b3b80d8
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