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path: root/lib/Analysis/MemoryDependenceAnalysis.cpp
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2009-12-02Silence compiler warnings.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90319 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02Cleanup/remove some parts of the lifetime region handling code in memdep and ↵Owen Anderson
GVN, per Chris' comments. Adjust testcases to match. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90304 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01rename some variables.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90258 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01tidyChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90257 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01fix 255.vortex again, third time's the charm.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90217 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30Revert r90107, fixing test/Transforms/GVN/2009-11-29-ReverseMap.ll and theNick Lewycky
llvm-gcc build. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90113 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30reapply r90093 with an addition of keeping the forwardChris Lattner
and reverse nonlocal memdep maps in synch, this should fix 255.vortex. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90107 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29revert this patch for now, it causes failures of:Chris Lattner
LLVM::Transforms/GVN/2009-02-17-LoadPRECrash.ll LLVM::Transforms/GVN/2009-06-17-InvalidPRE.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90096 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29Fix a really nasty caching bug I introduced in memdep. An entryChris Lattner
was being added to the Result vector, but not being put in the cache. This means that if the cache was reused wholesale for a later query that it would be missing this entry and we'd do an incorrect load elimination. Unfortunately, it's not really possible to write a useful testcase for this, but this unbreaks 255.vortex. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90093 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29Detabify.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90085 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28Teach memdep to look for memory use intrinsics during dependency queries. FixesNick Lewycky
PR5574. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90045 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28Enhance InsertPHITranslatedPointer to be able to return a list of newlyChris Lattner
inserted instructions. No functionality change until someone starts using it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90039 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28enable code to handle un-phi-translatable cases more aggressively:Chris Lattner
if we don't have an address expression available in a predecessor, then model this as the value being clobbered at the end of the pred block instead of being modeled as a complete phi translation failure. This is important for PRE of loads because we want to see that the load is available in all but this predecessor, and complete phi translation failure results in not getting any information about predecessors. This doesn't do anything until I renable code insertion since PRE now sees that it is available in all but one predecessors, but can't insert the addressing in the predecessor that is missing it to eliminate the redundancy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90037 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27Rework InsertPHITranslatedPointer to handle the recursive case, this Chris Lattner
fixes PR5630 and sets the stage for the next phase of goodness (testcase pending). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90019 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27recursively phi translate bitcast operands too, for consistency.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90016 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27add support for recursive phi translation and phi Chris Lattner
translation of add with immediate. This allows us to optimize this function: void test(int N, double* G) { long j; G[1] = 1; for (j = 1; j < N - 1; j++) G[j+1] = G[j] + G[j+1]; } to only do one load every iteration of the loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90013 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27add comment.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90002 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27reduce nesting, no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90001 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27teach GVN's load PRE to insert computations of the address in predecessorsChris Lattner
where it is not available. It's unclear how to get this inserted computation into GVN's scalar availability sets, Owen, help? :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89997 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27Fix phi translation in load PRE to agree with the phi Chris Lattner
translation done by memdep, and reenable gep translation again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89992 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27redisable this, my bootstrap worked because it wasn't an optimized build, ↵Chris Lattner
whoops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89991 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27try again.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89990 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27this is causing buildbot failures, disable for now.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89985 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27teach phi translation of GEPs to simplify geps like 'gep x, 0'.Chris Lattner
This allows us to compile the example from PR5313 into: LBB1_2: ## %bb incl %ecx movb %al, (%rsi) movslq %ecx, %rax movb (%rdi,%rax), %al testb %al, %al jne LBB1_2 instead of: LBB1_2: ## %bb movslq %eax, %rcx incl %eax movb (%rdi,%rcx), %cl movb %cl, (%rsi) movslq %eax, %rcx cmpb $0, (%rdi,%rcx) jne LBB1_2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89981 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27teach memdep to do trivial PHI translation of GEPs. More toChris Lattner
come. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89979 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26Teach memdep to phi translate bitcasts. This allows us to compileChris Lattner
the example in GCC PR16799 to: LBB1_2: ## %bb1 movl %eax, %eax subq %rax, %rdi movq %rdi, (%rcx) movl (%rdi), %eax testl %eax, %eax je LBB1_2 instead of: LBB1_2: ## %bb1 movl (%rdi), %ecx subq %rcx, %rdi movq %rdi, (%rax) cmpl $0, (%rdi) je LBB1_2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89978 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26factor some code out into some helper functions.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89975 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
2009-10-28Treat lifetime begin/end markers as allocations/frees respectively for theOwen Anderson
purposes for GVN/DSE. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85383 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-28Be more careful about invariance reasoning on "store" queries. Stores still ↵Owen Anderson
need to depend on Ref and ModRef calls within the invariant region. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85380 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-28Add trivial support for the invariance intrinsics to memdep. This logic isOwen Anderson
purely local for now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85378 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-27Rename MallocFreeHelper as MemoryBuiltinsVictor Hernandez
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85286 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26Rename MallocHelper as MallocFreeHelper, since it now also identifies calls ↵Victor Hernandez
to free() git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85181 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26Remove FreeInst.Victor Hernandez
Remove LowerAllocations pass. Update some more passes to treate free calls just like they were treating FreeInst. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85176 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-24Auto-upgrade free instructions to calls to the builtin free function.Victor Hernandez
Update all analysis passes and transforms to treat free calls just like FreeInst. Remove RaiseAllocations and all its tests since FreeInst no longer needs to be raised. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84987 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-23Remove AllocationInst. Since MallocInst went away, AllocaInst is the only ↵Victor Hernandez
subclass of AllocationInst, so it no longer is necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84969 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Memory dependence analysis was incorrectly stopping to scan for stores to a ↵Victor Hernandez
pointer at bitcast uses of a malloc call. It should continue scanning until the malloc call, and this patch fixes that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83931 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-20Revert r82404, it is causing a bootstrap miscompile. This is very very Chris Lattner
scary, as it indicates a lurking bug. yay. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82411 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-20improve memdep to eliminate bitcasts (and aliases, and noop geps) Chris Lattner
early for the stated reasons: this allows it to find more equivalences and depend less on code layout. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82404 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-18Enhance analysis passes so that they apply the same analysis to malloc calls ↵Victor Hernandez
as to MallocInst. Reviewed by Eli Friedman. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82281 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-31Make TargetData optional in MemoryDependenceAnalysis.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77727 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-31Remove an unnecessary header.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77725 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-13factor the 'optimized sort' code out into a static helper functionChris Lattner
and use it from one more place. Patch by Jakub Staszak! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75478 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-13Move the re-sort of invalidated NonLocalPointerDeps cache earlierChris Lattner
so that all code paths get it. PR4256 was about a case where the phi translation loop would find all preds in the Visited cache, so it could get by without re-sorting the NonLocalPointerDeps cache. Fix this by resorting it earlier, there is no reason not to do this. This patch inspired by Jakub Staszak's patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75476 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-25make memdep use the getModRefInfo method for stores instead of theChris Lattner
low-level alias() method, allowing it to reason more aggressively about pointers into constant memory. PR4189 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72403 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-29now that you can put a PointerIntPair in a SmallPtrSet, remove someChris Lattner
hackish workarounds from memdep git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67971 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-11Debug intriniscs should be skipped when lookingDale Johannesen
for a dependency, not terminate the search. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66709 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-09Ignore debug intrinsics when computing dependences.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66399 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-06Remove this as dbginfo intrinsics has been defined asZhou Sheng
IntrNoMem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66256 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-05Ignore the debug info intrinsics when looking for dependency through basic ↵Zhou Sheng
block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66119 91177308-0d34-0410-b5e6-96231b3b80d8
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