aboutsummaryrefslogtreecommitdiff
path: root/lib/Transforms/IPO
AgeCommit message (Collapse)Author
2009-02-18In theory the aliasee may have dead constant usersDuncan Sands
here. Since we only do the transform if there is one use, strip off any such users in the hope of making the transform fire more often. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64926 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18Add explicit keywords.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64915 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-17If an alias is dead and so is its aliasee, then globaldce wouldDuncan Sands
crash because the alias would still be using the aliasee when the aliasee was deleted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64844 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-17This transform also applies to private linkage.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64773 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-15Make this more useful for cleaning up after theDuncan Sands
one-definition-rule llvm-gcc changes (coming soon to a tree near you!). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64588 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-15If the target of an alias has internal linkage, then theDuncan Sands
alias can be morphed into the target. Implement this transform, and fix a crash in the existing transform at the same time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64583 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-28Rename getAnalysisToUpdate to getAnalysisIfAvailable.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63198 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-25The function that does nothing but call malloc is noalias return.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62956 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-23use CallSite::isCalle instead of slow getOperandNoGabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62877 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-23Simplify the logic of getting hold of a PHI predecessor block.Gabor Greif
There is now a direct way from value-use-iterator to incoming block in PHINode's API. This way we avoid the iterator->index->iterator trip, and especially the costly getOperandNo() invocation. Additionally there is now an assertion that the iterator really refers to one of the PHI's Uses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62869 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-22introduce a useful abstraction to find out if a Use is in the call position ↵Gabor Greif
of an instruction git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62788 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-18BasicAliasAnalysis and FunctionAttrs were bothDuncan Sands
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
2009-01-15Add the private linkage.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62279 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-14rewrite OptimizeAwayTrappingUsesOfLoads to 1) avoid a temporaryChris Lattner
vector and extraneous loop over it, 2) not delete globals used by phis/selects etc which could actually be useful. This fixes PR3321. Many thanks to Duncan for narrowing this down. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62201 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-13Correct a comment.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62165 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-12Enable recursive inlining. Reduce inlining thresholdDale Johannesen
back to 200; 400 seems to be too high, loses more than it gains. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62107 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-12Rename getABITypeSize to getTypePaddedSize, asDuncan Sands
suggested by Chris. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62099 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-11Increase default inlining aggressiveness in partialDale Johannesen
compensation for turning off gcc's inliner. This gets us closer to the amount of inlining we were getting before. It is not a win on everything, of course, but seems to gain overall. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62058 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-09Removed trailing whitespace from Makefiles.Misha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61991 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-09Adjustments to last patch based on review.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61969 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-07Whitespace - correct formatting.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61879 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-07Remove alloca tracking from nocapture analysis. Not onlyDuncan Sands
was it not very helpful, it was also wrong! The problem is shown in the testcase: the alloca might be passed to a nocapture callee which dereferences it and returns the original pointer. But because it was a nocapture call we think we don't need to track its uses, but we do. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61876 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-07Reorder these.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61873 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-07Use a switch rather than a sequence of "isa" tests.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61872 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-07The verifier checks that the aliasee is not null.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61870 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-05Teach the internalize pass to also internalizeDuncan Sands
global aliases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61754 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-05Not having an aliasee is a theoretical possibility.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61745 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-05Format more neatly.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61744 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-05Remove trailing spaces.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61743 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-05Delete unused global aliases with internal linkage.Duncan Sands
In fact this also deletes those with linkonce linkage, however this is currently dead because for the moment aliases aren't allowed to have this linkage type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61742 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-03Any void readonly functions are provably dead, don't waste time adding Nick Lewycky
nocapture attributes to them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61610 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-02Load tracking means that the value analyzed mayDuncan Sands
not have pointer type. In particular, it may be the condition argument for a select or a GEP index. While I was unable to construct a testcase for which some bits of the original pointer are captured due to one of these, it's very very close to being possible - so play safe and exclude these possibilities. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61580 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-02When calculating 'nocapture' argument attributes, allowDuncan Sands
the argument to be stored to an alloca by tracking uses of the alloca. This occurs 4 times (out of 7121, 0.05%) in MultiSource/Applications, so may not be worth it. On the other hand, it is easy to do and fairly cheap. The functions it helps are: W_addcom and W_addlit in spiff; process_args (argv) in d (make_dparser); ercPixConcealIMB in JM/ldecod. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61570 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-02Improve comments and reorganize a bit - no functionalityDuncan Sands
change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61569 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-02Make adding nocapture a bit stronger. FreeInst is nocapture. Also, Nick Lewycky
functions that don't write can't leak a pointer except through the return value, so a void readonly function is implicitly nocapture. Test these, and add a test that verifies that f1 calling f2 with an otherwise dead pointer gets both of them marked nocapture. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61552 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-01Mention that this pass does escape analysis in theDuncan Sands
leading comments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61548 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-31Look through phi nodes and select instructions whenDuncan Sands
calculating nocapture attributes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61535 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-31Don't analyze arguments already marked 'nocapture'.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61532 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-31Rename AddReadAttrs to FunctionAttrs, and teach it howDuncan Sands
to work out (in a very simplistic way) which function arguments (pointer arguments only) are only dereferenced and so do not escape. Mark such arguments 'nocapture'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61525 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-29Experiments show that looking through phi nodesDuncan Sands
and select instructions doesn't buy anything here except extra complexity: the only difference in the entire testsuite was that a readonly function became readnone in MiBench/consumer-typeset. Add a comment about this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61478 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-29Allow readnone functions to read (and write!) globalDuncan Sands
constants, since doing so is irrelevant for aliasing purposes. While this doesn't increase the total number of functions marked readonly or readnone in MultiSource/ Applications (3089), it does result in 12 functions being marked readnone rather than readonly. Before: readnone: 820 readonly: 2269 After: readnone: 832 readonly: 2257 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61469 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17insert some sequence points and preincrement an iterator to avoidChris Lattner
iterator invalidation problems. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61124 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-17Enhance heap sra to be substantially more aggressive w.r.t PHIChris Lattner
nodes. This allows it to do fairly general phi insertion if a load from a pointer global wants to be SRAd but the load is used by (recursive) phi nodes. This fixes a pessimization on ppc introduced by Load PRE. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61123 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16Fix another crash found by inspection. If we have a PHI node mergingChris Lattner
the load multiple times, make sure the check the uses of the PHI to ensure they are transformable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61102 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16fix a crash found by inspection.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61101 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-16switch some std::set/std::map to SmallPtrSet/DenseMap.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61081 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15enhance heap-sra to apply to fixed sized array allocations, not justChris Lattner
variable sized array allocations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61051 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15Use stripPointerCasts.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61047 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15minor tweaks for formatting, allow bitcast in ↵Chris Lattner
ValueIsOnlyUsedLocallyOrStoredToOneGlobal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61046 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-15refactor some code into a new TryToOptimizeStoreOfMallocToGlobal function.Chris Lattner
Use GetElementPtrInst::hasAllZeroIndices where possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61045 91177308-0d34-0410-b5e6-96231b3b80d8
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-09-24 11:25:47 +0000