aboutsummaryrefslogtreecommitdiffstats
path: root/lib/Analysis/BasicAliasAnalysis.cpp
Commit message (Collapse)AuthorAgeFilesLines
* Move a few more APIs back to 2.5 forms. The only remaining ones left to ↵Owen Anderson2009-07-311-9/+7
| | | | | | | | | 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
* Move ConstantExpr to 2.5 API.Owen Anderson2009-07-291-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77494 91177308-0d34-0410-b5e6-96231b3b80d8
* Make AliasAnalysis and related classes useDan Gohman2009-07-251-18/+20
| | | | | | | getAnalysisIfAvailable<TargetData>(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77028 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert the ConstantInt constructors back to their 2.5 forms where possible, ↵Owen Anderson2009-07-241-2/+2
| | | | | | 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
* Get rid of the Pass+Context magic.Owen Anderson2009-07-221-16/+16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76702 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert the addition of hasNoPointerOverflow to GEPOperator.Dan Gohman2009-07-201-7/+2
| | | | | | | | | | | | | Getelementptrs that are defined to wrap are virtually useless to optimization, and getelementptrs that are undefined on any kind of overflow are too restrictive -- it's difficult to ensure that all intermediate addresses are within bounds. I'm going to take a different approach. Remove a few optimizations that depended on this flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76437 91177308-0d34-0410-b5e6-96231b3b80d8
* Make BasicAliasAnalysis and Value::getUnderlyingObject useDan Gohman2009-07-171-4/+6
| | | | | | | | | GEPOperator's hasNoPointer0verflow(), and make a few places in instcombine that create GEPs that may overflow clear the NoOverflow value. Among other things, this partially addresses PR2831. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76252 91177308-0d34-0410-b5e6-96231b3b80d8
* Move the ConstantInt uniquing table into LLVMContextImpl. This exposed a ↵Owen Anderson2009-07-161-0/+4
| | | | | | | | | number of issues in our current context-passing stuff, which is also fixed here git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76089 91177308-0d34-0410-b5e6-96231b3b80d8
* llvm_unreachable->llvm_unreachable(0), LLVM_UNREACHABLE->llvm_unreachable.Edwin Török2009-07-141-1/+1
| | | | | | | | | | This adds location info for all llvm_unreachable calls (which is a macro now) in !NDEBUG builds. In NDEBUG builds location info and the message is off (it only prints "UREACHABLE executed"). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75640 91177308-0d34-0410-b5e6-96231b3b80d8
* assert(0) -> LLVM_UNREACHABLE.Edwin Török2009-07-111-1/+2
| | | | | | | | | | Make llvm_unreachable take an optional string, thus moving the cerr<< out of line. LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for NDEBUG builds. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75379 91177308-0d34-0410-b5e6-96231b3b80d8
* "LLVMContext* " --> "LLVMContext *"Owen Anderson2009-07-061-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74878 91177308-0d34-0410-b5e6-96231b3b80d8
* Thread LLVMContext through the constant folding APIs, which touches a lot of ↵Owen Anderson2009-07-061-15/+19
| | | | | | files. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74844 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unneeded #include.Owen Anderson2009-06-221-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73911 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach BasicAliasAnalysis to understand constant gep indices that fallDan Gohman2009-05-271-4/+25
| | | | | | | | | | | | | | beyond their associated static array type. I believe that this fixes a legitimate bug, because BasicAliasAnalysis already has code to check for this condition that works for non-constant indices, however it was missing the case of constant indices. With this change, it checks for both. This fixes PR4267, and miscompiles of SPEC 188.ammp and 464.h264.href. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72451 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename PaddedSize to AllocSize, in the hope that thisDuncan Sands2009-05-091-1/+1
| | | | | | | | will make it more obvious what it represents, and stop it being confused with the StoreSize. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71349 91177308-0d34-0410-b5e6-96231b3b80d8
* Generalize some alias analysis logic from atomicDuncan Sands2009-02-141-51/+0
| | | | | | | intrinsics to any IntrWriteArgMem intrinsics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64551 91177308-0d34-0410-b5e6-96231b3b80d8
* BasicAA was making the assumption that a local allocation which hadn't escapedNick Lewycky2009-02-131-3/+3
| | | | | | | | | couldn't ever be the return of call instruction. However, it's quite possible that said local allocation is itself the return of a function call. That's what malloc and calloc are for, actually. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64442 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor my previous change to maintain the distinction between ↵Owen Anderson2009-02-051-21/+52
| | | | | | | | | AliasAnalysis and BasicAliasAnalysis. This involves some wider changes because it folds away some never-used methods. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63900 91177308-0d34-0410-b5e6-96231b3b80d8
* Finish making AliasAnalysis aware of the fact that most atomic intrinsics ↵Owen Anderson2009-02-041-0/+16
| | | | | | | | | only dereference their arguments, and enhance BasicAA to make use of this fact when computing ModRef info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63718 91177308-0d34-0410-b5e6-96231b3b80d8
* Move isIdentifiedObject and isNoAliasCall into AliasAnalysis.cpp sinceDan Gohman2009-02-031-24/+0
| | | | | | | | | they are useful to analyses other than BasicAliasAnalysis.cpp. Include the full comment for isIdentifiedObject in the header file. Thanks to Chris for suggeseting this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63589 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a post-RA scheduling dependency bug.Dan Gohman2009-01-301-1/+1
| | | | | | | | | | | | | | | | If a MachineInstr doesn't have a memoperand but has an opcode that is known to load or store, assume its memory reference may alias *anything*, including stack slots which the compiler completely controls. To partially compensate for this, teach the ScheduleDAG building code to do basic getUnderlyingValue analysis. This greatly reduces the number of instructions that require restrictive dependencies. This code will need to be revisited when we start doing real alias analysis, but it should suffice for now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63370 91177308-0d34-0410-b5e6-96231b3b80d8
* BasicAliasAnalysis and FunctionAttrs were bothDuncan Sands2009-01-181-52/+3
| | | | | | | | | | doing very similar pointer capture analysis. Factor out the common logic. The new version is from FunctionAttrs since it does a better job than the version in BasicAliasAnalysis git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62461 91177308-0d34-0410-b5e6-96231b3b80d8
* add a commentGabor Greif2009-01-181-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62436 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename getABITypeSize to getTypePaddedSize, asDuncan Sands2009-01-121-1/+1
| | | | | | | suggested by Chris. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62099 91177308-0d34-0410-b5e6-96231b3b80d8
* make tblgen autogenerate the nocapture intrinsics for Chris Lattner2009-01-121-4/+0
| | | | | | | | llvm.memcpy/memset/memmove. This allows removal of some hackish code from basicaa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62071 91177308-0d34-0410-b5e6-96231b3b80d8
* When checking if an Argument escapes, check ifDuncan Sands2009-01-051-7/+13
| | | | | | | | | the argument is marked nocapture - no need to analyze the argument if the answer is already known! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61753 91177308-0d34-0410-b5e6-96231b3b80d8
* Resubmit support for the 'nocapture' attribute.Nick Lewycky2008-12-191-6/+17
| | | | | | | | | | | The problematic part of this patch is that we were out of attribute bits, requiring some fancy bit hacking to make it fit (by shrinking alignment) without breaking existing users or the file format. This change will require users to rebuild llvm-gcc to match llvm. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61239 91177308-0d34-0410-b5e6-96231b3b80d8
* Temporarily revert r61019, r61030, and r61040. These were breaking LLVM ReleaseBill Wendling2008-12-161-17/+6
| | | | | | | builds. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61094 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach basicaa to use the nocapture attribute when possible. When theChris Lattner2008-12-151-6/+17
| | | | | | | | intrinsics are properly marked nocapture, the fixme should be addressed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61040 91177308-0d34-0410-b5e6-96231b3b80d8
* Allow basicaa to walk through geps with identical indices in Chris Lattner2008-12-101-18/+32
| | | | | | | | | | | | | parallel, allowing it to decide that P/Q must alias if A/B must alias in things like: P = gep A, 0, i, 1 Q = gep B, 0, i, 1 This allows GVN to delete 62 more instructions out of 403.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60820 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach BasicAA::getModRefInfo(CallSite, CallSite) someChris Lattner2008-12-091-4/+20
| | | | | | | | | | | | | | | | | | | | | | | tricks based on readnone/readonly functions. Teach memdep to look past readonly calls when analyzing deps for a readonly call. This allows elimination of a few more calls from 403.gcc: before: 63 gvn - Number of instructions PRE'd 153986 gvn - Number of instructions deleted 50069 gvn - Number of loads deleted after: 63 gvn - Number of instructions PRE'd 153991 gvn - Number of instructions deleted 50069 gvn - Number of loads deleted 5 calls isn't much, but this adds plumbing for the next change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60794 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix comment typo.Duncan Sands2008-12-081-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60697 91177308-0d34-0410-b5e6-96231b3b80d8
* Some minor optimizations for isObjectSmallerThan.Chris Lattner2008-12-081-7/+12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60687 91177308-0d34-0410-b5e6-96231b3b80d8
* Seriously strengthen the guarantee offered by noalias on a function's returnNick Lewycky2008-11-241-3/+3
| | | | | | | | | value. It must now be as if the pointer were allocated and has not escaped to the caller. Thanks to Dan Gohman for pointing out the error in the original and helping devise this definition. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59940 91177308-0d34-0410-b5e6-96231b3b80d8
* Extend the 'noalias' attribute to function return values. This is intended toNick Lewycky2008-11-241-8/+17
| | | | | | | | | | indicate functions that allocate, such as operator new, or list::insert. The actual definition is slightly less strict (for now). No changes to the bitcode reader/writer, asm printer or verifier were needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59934 91177308-0d34-0410-b5e6-96231b3b80d8
* Factorize code: remove variants of "strip offDuncan Sands2008-10-011-28/+4
| | | | | | | | | | | | pointer bitcasts and GEP's", and centralize the logic in Value::getUnderlyingObject. The difference with stripPointerCasts is that stripPointerCasts only strips GEPs if all indices are zero, while getUnderlyingObject strips GEPs no matter what the indices are. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56922 91177308-0d34-0410-b5e6-96231b3b80d8
* s/ParameterAttributes/Attributes/gDevang Patel2008-09-231-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56513 91177308-0d34-0410-b5e6-96231b3b80d8
* Tidy up several unbeseeming casts from pointer to intptr_t.Dan Gohman2008-09-041-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55779 91177308-0d34-0410-b5e6-96231b3b80d8
* simplify some code by using a helper function. This really reallyChris Lattner2008-06-161-22/+16
| | | | | | | wants a 'nocapture' predicate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52304 91177308-0d34-0410-b5e6-96231b3b80d8
* move a bunch of predicates up into their own sectionChris Lattner2008-06-161-157/+171
| | | | | | | in this file, no other changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52303 91177308-0d34-0410-b5e6-96231b3b80d8
* Other parts of this code treat noalias arguments as objects forChris Lattner2008-06-161-4/+8
| | | | | | | the purposes of escape analysis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52302 91177308-0d34-0410-b5e6-96231b3b80d8
* If we are checking to see if the result of a call aliases aChris Lattner2008-06-161-1/+21
| | | | | | | | pointer derived from a local allocation, if the local allocation never escapes, the pointers can't alias. This implements PR2436 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52301 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor basicaa's main alias function somethin' fierce. Chris Lattner2008-06-161-104/+94
| | | | | | | | | | This fixes several minor bugs (such as returning noalias for comparisons between external weak functions an null) but is mostly a cleanup. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52299 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixes PR2395. Looking for a constant in a GEP tail (when the first GEP Wojciech Matyjewicz2008-06-021-1/+7
| | | | | | | | | is longer than the second one) should stop after finding one. Added break instruction guarantees it. It also changes difference between offsets to absolute value of this difference in the condition. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51875 91177308-0d34-0410-b5e6-96231b3b80d8
* Clean up the use of static and anonymous namespaces. This turned upDan Gohman2008-05-131-14/+14
| | | | | | | | several things that were neither in an anonymous namespace nor static but not intended to be global. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51017 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a "large integer implicitly truncated to unsigned type"Duncan Sands2008-04-211-1/+1
| | | | | | | warning. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50033 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't assume a tail call can't reference a byvalDale Johannesen2008-04-151-2/+4
| | | | | | | | argument to the outer function, this isn't correct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49731 91177308-0d34-0410-b5e6-96231b3b80d8
* Restore isCFGOnly property of various analysis passes.Devang Patel2008-03-201-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48579 91177308-0d34-0410-b5e6-96231b3b80d8
* PassInfo keep tracks whether a pass is an analysis pass or not.Devang Patel2008-03-191-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48554 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a compiler warning.Duncan Sands2008-02-191-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47328 91177308-0d34-0410-b5e6-96231b3b80d8
generated by cgit v1.1 at 2025-06-03 06:27:24 +0000