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path: root/lib/Transforms/Utils/LoopSimplify.cpp
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2007-12-29Remove attribution from file headers, per discussion on llvmdev.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-27Make LoopInfoBase more generic, in preparation for having MachineLoopInfo. ↵Owen Anderson
This involves a small interface change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44348 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-29Fix PR1752 and LoopSimplify/2007-10-28-InvokeCrash.ll: terminators Chris Lattner
can have uses too. Wouldn't it be nice if invoke didn't exist? :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43426 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-18Move Split<...>() into DomTreeBase. This should make the #include's of ↵Owen Anderson
DominatorInternals.h in CodeExtractor and LoopSimplify unnecessary. Hartmut, could you confirm that this fixes the issues you were seeing? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43115 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-17Fixed linker errors (unresolved externals: split<>(...)) when compiling with ↵Hartmut Kaiser
VC++. Please review. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43081 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-21Use SmallVector instead of std::vector.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41207 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-06remove some dead linesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40859 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-19Verify loop info.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40062 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-29Fix reference to iterator invalidated by an erase operation. UncoveredDavid Greene
by _GLIBCXX_DEBUG. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37796 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-21Move code to update dominator information after basic block is splitDevang Patel
from LoopSimplify.cpp to Dominator.cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37689 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-11Add and use DominatorTreeBase::findNearestCommonDominator().Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37545 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-11Simplify.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37542 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-11simplifyDevang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37541 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-11Simplify. Dominator Tree is required so always available.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37540 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-08Update LoopSimplify to require and preserve DominatorTree only.Devang Patel
Now LoopSimplify does not require nor preserve ETForest. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37512 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-04s/DominatorTree::createNewNode/DominatorTree::addNewBlock/gDevang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37415 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-04s/llvm::DominatorTreeBase::DomTreeNode/llvm::DomTreeNode/gDevang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37407 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-03s/DominatorTreeBase::Node/DominatorTreeBase:DomTreeNode/gDevang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37403 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-06Fix typo in comment.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36873 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-03Drop 'const'Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36662 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-02Use 'static const char' instead of 'static const int'.Devang Patel
Due to darwin gcc bug, one version of darwin linker coalesces static const int, which defauts PassID based pass identification. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-01Do not use typeinfo to identify pass in pass manager.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-20Avoid recursion.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36272 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-15Remove ImmediateDominator analysis. The same information can be obtained ↵Owen Anderson
from DomTree. A lot of code for constructing ImmediateDominator is now folded into DomTree construction. This is part of the ongoing work for PR217. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36063 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09Re-constify things that don't break the build. Last patch in thisOwen Anderson
series, I promise. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35848 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09Unconst-ify stuff that broke the build.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35843 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09Const-ify some parameters, and some cosmetic cleanups. No functionalityOwen Anderson
change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35842 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09Tabs -> SpacesOwen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35841 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09Improve some _slow_ behavior introduced in my patches the last few days.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35839 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-09Cleanup some from my DomSet-removal changes. Add a newOwen Anderson
isReachableFromEntry test to ETForest to factor a common test out of code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35786 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-08Remove DominatorSet usage from LoopSimplify. Patch from Owen Anderson.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35757 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-07Add DomSet back, and revert the changes to LoopSimplify. Apparently theOwen Anderson
ETForest updating mechanisms don't work as I thought they did. These changes will be reapplied once the issue is worked out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35741 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-07Completely purge DomSet from LoopSimplify. This is part of theOwen Anderson
continuing work on PR1171. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35730 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-07Expunge a bunch of uses of DomSet from LoopSimplify. Many more remain.Owen Anderson
This is the beginning of work for PR1171. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35720 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-20LoopSimplify::FindPHIToPartitionLoops()Devang Patel
Use ETForest instead of DominatorSet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35221 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-19switch more statistics over to STATISTIC, eliminating static ctors. Also,Chris Lattner
delete some dead ones. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32694 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-06Detemplatize the Statistic class. The only type it is instantiated withChris Lattner
is 'unsigned'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32279 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-02For PR786:Reid Spencer
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting fall out by removing unused variables. Remaining warnings have to do with unused functions (I didn't want to delete code without review) and unused variables in generated code. Maintainers should clean up the remaining issues when they see them. All changes pass DejaGnu tests and Olden. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31380 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-23Be far more careful when splitting a loop header, either to form a preheaderChris Lattner
or when splitting loops with a common header into multiple loops. In particular the old code would always insert the preheader before the old loop header. This is disasterous in cases where the loop hasn't been rotated. For example, it can produce code like: .. outside the loop... jmp LBB1_2 #bb13.outer LBB1_1: #bb1 movsd 8(%esp,%esi,8), %xmm1 mulsd (%edi), %xmm1 addsd %xmm0, %xmm1 addl $24, %edi incl %esi jmp LBB1_3 #bb13 LBB1_2: #bb13.outer leal (%edx,%eax,8), %edi pxor %xmm1, %xmm1 xorl %esi, %esi LBB1_3: #bb13 movapd %xmm1, %xmm0 cmpl $4, %esi jl LBB1_1 #bb1 Note that the loop body is actually LBB1_1 + LBB1_3, which means that the loop now contains an uncond branch WITHIN it to jump around the inserted loop header (LBB1_2). Doh. This patch changes the preheader insertion code to insert it in the right spot, producing this code: ... outside the loop, fall into the header ... LBB1_1: #bb13.outer leal (%edx,%eax,8), %esi pxor %xmm0, %xmm0 xorl %edi, %edi jmp LBB1_3 #bb13 LBB1_2: #bb1 movsd 8(%esp,%edi,8), %xmm0 mulsd (%esi), %xmm0 addsd %xmm1, %xmm0 addl $24, %esi incl %edi LBB1_3: #bb13 movapd %xmm0, %xmm1 cmpl $4, %edi jl LBB1_2 #bb1 Totally crazy, no branch in the loop! :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30587 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-23Teach UpdateDomInfoForRevectoredPreds to handle revectored preds that are notChris Lattner
reachable, making it general purpose enough for use by InsertPreheaderForLoop. Eliminate custom dominfo updating code in InsertPreheaderForLoop, using UpdateDomInfoForRevectoredPreds instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30586 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-27eliminate RegisterOpt. It does the same thing as RegisterPass.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29925 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-27s|llvm/Support/Visibility.h|llvm/Support/Compiler.h|Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29911 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-12Don't attempt to split subloops out of a loop with a huge number of backedges.Chris Lattner
Not only will this take huge amounts of compile time, the resultant loop nests won't be useful for optimization. This reduces loopsimplify time on Transforms/LoopSimplify/2006-08-11-LoopSimplifyLongTime.ll from ~32s to ~0.4s with a debug build of llvm on a 2.7Ghz G5. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29647 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-12Reimplement the loopsimplify code which deletes edges from unreachableChris Lattner
blocks that target loop blocks. Before, the code was run once per loop, and depended on the number of predecessors each block in the loop had. Unfortunately, scanning preds can be really slow when huge numbers of phis exist or when phis with huge numbers of inputs exist. Now, the code is run once per function and scans successors instead of preds, which is far faster. In addition, the new code is simpler and is goto free, woo. This change speeds up a nasty testcase Duraid provided me from taking hours to taking ~72s with a debug build. The functionality this implements is already tested in the testsuite as Transforms/CodeExtractor/2004-03-13-LoopExtractorCrash.ll. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29644 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28Use hidden visibility to make symbols in an anonymous namespace getChris Lattner
dropped. This shrinks libllvmgcc.dylib another 67K git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28975 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-14Canonicalize inner loops before outer loops. Inner loop canonicalizationChris Lattner
can provide work for the outer loop to canonicalize. This fixes a case that breaks unswitching. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26189 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-14When splitting exit edges to canonicalize loops, make sure to put the newChris Lattner
block in the appropriate loop nest. Third time is the charm, right? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26187 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-12Revert my last patch. It too breaks stuffChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26128 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11Fix for my previously reverted patchChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26126 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-11revert my previous change, it exposed other problems.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26121 91177308-0d34-0410-b5e6-96231b3b80d8
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