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path: root/lib/Transforms/Utils/LoopSimplify.cpp
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* Rename LoopSimplify.h to LoopUtils.hHal Finkel2013-05-20
| | | | | | As discussed, LoopUtils.h is a better name. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182314 91177308-0d34-0410-b5e6-96231b3b80d8
* Expose InsertPreheaderForLoop from LoopSimplify to other passesHal Finkel2013-05-20
| | | | | | | | | | | Other passes, PPC counter-loop formation for example, also need to add loop preheaders outside of the regular loop simplification pass. This makes InsertPreheaderForLoop a global function so that it can be used by other passes. No functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182299 91177308-0d34-0410-b5e6-96231b3b80d8
* Move all of the header files which are involved in modelling the LLVM IRChandler Carruth2013-01-02
| | | | | | | | | | | | | | | | | | | | | 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
* Use the new script to sort the includes of every file under lib.Chandler Carruth2012-12-03
| | | | | | | | | | | | | | | | | 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
* LoopSimplify: Preserve DependenceAnalysis.Benjamin Kramer2012-10-26
| | | | | | | | | | This is currently true, but may change when DA grows more aggressive caching. Without this setting it's impossible to use DA from a LoopPass because DA is a function pass and cannot be properly scheduled in between LoopPasses. The LoopManager reacts to this with an infinite loop which made this really annoying to debug. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166788 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix SCEV cache invalidation in LCSSA and LoopSimplify.Benjamin Kramer2012-10-26
| | | | | | | | | | | | | | The LoopSimplify bug is pretty harmless because the loop goes from unanalyzable to analyzable but the LCSSA bug is very nasty. It only comes into play with a specific order of the LoopPassManager worklist and can cause actual miscompilations, when a SCEV refers to a value that has been replaced with PHI node. SCEVExpander may then insert code into the wrong place, either violating domination or randomly miscompiling stuff. Comes with an extensive test case reduced from the test-suite with bugpoint+SCEVValidator. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166787 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopSimplify bug fix. Handle indirect loop back edges.Andrew Trick2012-03-20
| | | | | | | | Do not call SplitBlockPredecessors on a loop preheader when one of the predecessors is an indirectbr. Otherwise, you will hit this assert: !isa<IndirectBrInst>(Preds[i]->getTerminator()) && "Cannot split an edge from an IndirectBrInst" git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153134 91177308-0d34-0410-b5e6-96231b3b80d8
* whitespaceAndrew Trick2012-03-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153133 91177308-0d34-0410-b5e6-96231b3b80d8
* Make loop preheader insertion in LoopSimplify handle the case where the loop ↵Eli Friedman2011-12-15
| | | | | | header is a landing pad correctly (by splitting the landingpad out of the loop header). Make some adjustments to the rest of LoopSimplify to make it clear that the rest of LoopSimplify isn't making bad assumptions about the presence of landing pads. PR11575. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146621 91177308-0d34-0410-b5e6-96231b3b80d8
* SplitBlockPredecessors uses ArrayRef instead of Data and Size.Jakub Staszak2011-12-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146277 91177308-0d34-0410-b5e6-96231b3b80d8
* Propagate TargetLibraryInfo throughout ConstantFolding.cpp and Chad Rosier2011-12-01
| | | | | | | InstructionSimplify.cpp. Other fixups as needed. Part of rdar://10500969 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145559 91177308-0d34-0410-b5e6-96231b3b80d8
* Intelligently split the landing pad block.Bill Wendling2011-08-19
| | | | | | | | | | | We have to be careful when splitting the landing pad block, because the landingpad instruction is required to remain as the first non-PHI of an invoke's unwind edge. To retain this, we split the block into two blocks, moving the predecessors within the loop to one block and the remaining predecessors to the other. The landingpad instruction is cloned into the new blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138015 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r137871. The loop simplify pass should require all exits from a loop thatBill Wendling2011-08-18
| | | | | | | aren't from an indirect branch need to be dominated by the loop header. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137981 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't optimize the landing pad exit block.Bill Wendling2011-08-17
| | | | | | | | | One way to exit the loop is through an unwind edge. However, that may involve splitting the critical edge of the landing pad, which is non-trivial. Prevent the transformation from rewriting the landing pad exit loop block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137871 91177308-0d34-0410-b5e6-96231b3b80d8
* Silence a bunch (but not all) "variable written but not read" warningsDuncan Sands2011-08-12
| | | | | | | when building with assertions disabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137460 91177308-0d34-0410-b5e6-96231b3b80d8
* SCEV: Use AssertingVH to catch dangling BasicBlock* when passes forgetAndrew Trick2011-08-03
| | | | | | | to notify SCEV of a change. Add forgetLoop in a couple of those places. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136797 91177308-0d34-0410-b5e6-96231b3b80d8
* whitespaceAndrew Trick2011-08-03
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136795 91177308-0d34-0410-b5e6-96231b3b80d8
* Set debug loc for new preheader's terminator.Devang Patel2011-06-17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133298 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a ton of comment typos found by codespell. Patch byChris Lattner2011-04-15
| | | | | | | | Luis Felipe Strano Moraes! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129558 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove PHINode::reserveOperandSpace(). Instead, add a parameter toJay Foad2011-03-30
| | | | | | PHINode::Create() giving the (known or expected) number of operands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128537 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename 'loopsimplify' to 'loop-simplify'.Cameron Zwarich2011-02-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125317 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove code for updating dominance frontiers and some outdated references toCameron Zwarich2011-01-18
| | | | | | | dominance and post-dominance frontiers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123725 91177308-0d34-0410-b5e6-96231b3b80d8
* this pass claims to preserve scev, make sure to tell it about deletions.Chris Lattner2011-01-11
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123247 91177308-0d34-0410-b5e6-96231b3b80d8
* split dom frontier handling stuff out to its own DominanceFrontier header,Chris Lattner2011-01-02
| | | | | | | | so that Dominators.h is *just* domtree. Also prune #includes a bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122714 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix PR8702 by not having LoopSimplify claim to preserve LCSSA form. As ↵Duncan Sands2011-01-02
| | | | | | | | | | | described in the PR, the pass could break LCSSA form when inserting preheaders. It probably would be easy enough to fix this, but since currently we always go into LCSSA form after running this pass, doing so is not urgent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122695 91177308-0d34-0410-b5e6-96231b3b80d8
* Factor code for testing whether replacing one value with anotherDuncan Sands2010-11-18
| | | | | | | | | preserves LCSSA form out of ScalarEvolution and into the LoopInfo class. Use it to check that SimplifyInstruction simplifications are not breaking LCSSA form. Fixes PR8622. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119727 91177308-0d34-0410-b5e6-96231b3b80d8
* Have a few places that want to simplify phi nodes use SimplifyInstructionDuncan Sands2010-11-16
| | | | | | | rather than calling hasConstantValue. No intended functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119352 91177308-0d34-0410-b5e6-96231b3b80d8
* Get rid of static constructors for pass registration. Instead, every pass ↵Owen Anderson2010-10-19
| | | | | | | | | | | | | | | | | | 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
* Begin adding static dependence information to passes, which will allow us toOwen Anderson2010-10-12
| | | | | | | | | | perform initialization without static constructors AND without explicit initialization by the client. For the moment, passes are required to initialize both their (potential) dependencies and any passes they preserve. I hope to be able to relax the latter requirement in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116334 91177308-0d34-0410-b5e6-96231b3b80d8
* Now with fewer extraneous semicolons!Owen Anderson2010-10-07
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115996 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix LoopSimplify to notify ScalarEvolution when splitting a loop backedgeDan Gohman2010-09-04
| | | | | | | | into an inner loop, as the new loop iteration may differ substantially. This fixes PR8078. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113057 91177308-0d34-0410-b5e6-96231b3b80d8
* Now that PassInfo and Pass::ID have been separated, move the rest of the ↵Owen Anderson2010-08-23
| | | | | | passes over to the new registration API. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111815 91177308-0d34-0410-b5e6-96231b3b80d8
* Avoid #include <ScalarEvolution.h> in LoopSimplify.cpp, which doesn'tDan Gohman2010-08-16
| | | | | | | actually use ScalarEvolution. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111124 91177308-0d34-0410-b5e6-96231b3b80d8
* LoopSimplify shouldn't split loop backedges that use indirectbr. PR7867.Dan Gohman2010-08-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111061 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply r110396, with fixes to appease the Linux buildbot gods.Owen Anderson2010-08-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r110396 to fix buildbots.Owen Anderson2010-08-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't use PassInfo* as a type identifier for passes. Instead, use the ↵Owen Anderson2010-08-05
| | | | | | | | | address of the static ID member as the sole unique type identifier. Clean up APIs related to this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove LCSSA's bogus dependence on LoopSimplify and LoopSimplify's bogusDan Gohman2010-07-26
| | | | | | | | | | | | | | | dependence on DominanceFrontier. Instead, add an explicit DominanceFrontier pass in StandardPasses.h to ensure that it gets scheduled at the right time. Declare that loop unrolling preserves ScalarEvolution, and shuffle some getAnalysisUsages. This eliminates one LoopSimplify and one LCCSA run in the standard compile opts sequence. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109413 91177308-0d34-0410-b5e6-96231b3b80d8
* keep in 80 colsGabor Greif2010-07-22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109122 91177308-0d34-0410-b5e6-96231b3b80d8
* Reorder the contents of various getAnalysisUsage functions, eliminatingDan Gohman2010-07-16
| | | | | | | a redundant loopsimplify run from the default -O2 sequence. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108539 91177308-0d34-0410-b5e6-96231b3b80d8
* cache result of operator*Gabor Greif2010-07-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107983 91177308-0d34-0410-b5e6-96231b3b80d8
* cache operator*'s result (in multiple functions)Gabor Greif2010-07-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107965 91177308-0d34-0410-b5e6-96231b3b80d8
* Use pre-increment instead of post-increment when the result is not used.Dan Gohman2010-06-22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106542 91177308-0d34-0410-b5e6-96231b3b80d8
* Skip debug info intrinsics.Devang Patel2010-03-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98581 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a comment.Dan Gohman2010-03-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98122 91177308-0d34-0410-b5e6-96231b3b80d8
* Add some debug output to LoopSimplify.Dan Gohman2010-03-01
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97458 91177308-0d34-0410-b5e6-96231b3b80d8
* Make LoopSimplify change conditional branches in loop exiting blocksDan Gohman2010-02-25
| | | | | | | | | | | | | which branch on undef to branch on a boolean constant for the edge exiting the loop. This helps ScalarEvolution compute trip counts for loops. Teach ScalarEvolution to recognize single-value PHIs, when safe, and ForgetSymbolicName to forget such single-value PHI nodes as apprpriate in ForgetSymbolicName. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97126 91177308-0d34-0410-b5e6-96231b3b80d8
* Use a SmallSetVector instead of a SetVector; this code showed up as aDan Gohman2010-02-05
| | | | | | | malloc caller in a profile. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95407 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a comment typo.Bob Wilson2010-01-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93560 91177308-0d34-0410-b5e6-96231b3b80d8
* revert r89298, which was committed without a testcase. I thinkChris Lattner2009-12-21
| | | | | | | the underlying PHI node insertion issue in SSAUpdate is fixed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91821 91177308-0d34-0410-b5e6-96231b3b80d8
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