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* Teach globalopt how to evaluate an invoke with a non-void return type.Dan Gohman2012-03-131-5/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152634 91177308-0d34-0410-b5e6-96231b3b80d8
* Taken into account Duncan's comments for r149481 dated by 2nd Feb 2012:Stepan Dyatkovskiy2012-03-081-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20120130/136146.html Implemented CaseIterator and it solves almost all described issues: we don't need to mix operand/case/successor indexing anymore. Base iterator class is implemented as a template since it may be initialized either from "const SwitchInst*" or from "SwitchInst*". ConstCaseIt is just a read-only iterator. CaseIt is read-write iterator; it allows to change case successor and case value. Usage of iterator allows totally remove resolveXXXX methods. All indexing convertions done automatically inside the iterator's getters. Main way of iterator usage looks like this: SwitchInst *SI = ... // intialize it somehow for (SwitchInst::CaseIt i = SI->caseBegin(), e = SI->caseEnd(); i != e; ++i) { BasicBlock *BB = i.getCaseSuccessor(); ConstantInt *V = i.getCaseValue(); // Do something. } If you want to convert case number to TerminatorInst successor index, just use getSuccessorIndex iterator's method. If you want initialize iterator from TerminatorInst successor index, use CaseIt::fromSuccessorIndex(...) method. There are also related changes in llvm-clients: klee and clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152297 91177308-0d34-0410-b5e6-96231b3b80d8
* Plog a memleak in GlobalOpt.Benjamin Kramer2012-02-271-1/+1
| | | | | | Found by valgrind. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151525 91177308-0d34-0410-b5e6-96231b3b80d8
* GCC fails to understand that NextBB is always initialized if EvaluateBlockDuncan Sands2012-02-231-1/+1
| | | | | | | returns 'true' and emits a warning. Help it out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151242 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the target-aware constant folder on expressions to improve the chanceNick Lewycky2012-02-211-2/+9
| | | | | | | | | | | | | | they'll be simple enough to simulate, and to reduce the chance we'll encounter equal but different simple pointer constants. This removes the symptoms from PR11352 but is not a full fix. A proper fix would either require a guarantee that two constant objects we simulate are folded when equal, or a different way of handling equal pointers (ie., trying a constantexpr icmp on them to see whether we know they're equal or non-equal or unsure). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151093 91177308-0d34-0410-b5e6-96231b3b80d8
* Check for the correct size in the invariant marker.Nick Lewycky2012-02-201-4/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151003 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename class Evaluate to Evaluator and put it in an anonymous namespace.Nick Lewycky2012-02-201-12/+17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150947 91177308-0d34-0410-b5e6-96231b3b80d8
* Move EvaluateFunction and EvaluateBlock into a class, and make the class storeNick Lewycky2012-02-191-122/+137
| | | | | | | the information that they pass around between them. No functionality change! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150939 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for invariant.start inside the static constructor evaluator. This isNick Lewycky2012-02-171-12/+47
| | | | | | | | | | useful to represent a variable that is const in the source but can't be constant in the IR because of a non-trivial constructor. If globalopt evaluates the constructor, and there was an invariant.start with no matching invariant.end possible, it will mark the global constant afterwards. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150794 91177308-0d34-0410-b5e6-96231b3b80d8
* Handle InvokeInst in EvaluateBlock. Don't try to support exceptions, it's justNick Lewycky2012-02-121-9/+14
| | | | | | | that no optz'ns have run yet to convert invokes to calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150326 91177308-0d34-0410-b5e6-96231b3b80d8
* false is totally null!Nick Lewycky2012-02-121-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150324 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove redundant getAnalysis<> calls in GlobalOpt. Add a few Itanium ABI callsNick Lewycky2012-02-121-10/+8
| | | | | | | to TargetLibraryInfo and use one of them in GlobalOpt. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150323 91177308-0d34-0410-b5e6-96231b3b80d8
* Pass TargetData and TargetLibraryInfo through to the constant folder. Fixes aNick Lewycky2012-02-121-25/+37
| | | | | | | few fixme's when TLI was added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150322 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix function name in comment to match actual name. Fix comments that are usingNick Lewycky2012-02-121-15/+15
| | | | | | | doxy-style on local variables to not do so. Fix one 80-col violation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150320 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't traverse the PHI nodes twice. No functionality change!Nick Lewycky2012-02-121-7/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150319 91177308-0d34-0410-b5e6-96231b3b80d8
* Tweak comment readability and grammar.Benjamin Kramer2012-02-091-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150183 91177308-0d34-0410-b5e6-96231b3b80d8
* GlobalOpt: Be more aggressive about elminating side-effect free static dtors.Benjamin Kramer2012-02-091-4/+5
| | | | | | | | | GlobalOpt runs early in the pipeline (before inlining) and complex class hierarchies often introduce bitcasts or GEPs which weren't optimized away. Teach it to ignore side-effect free instructions instead of depending on other passes to remove them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150174 91177308-0d34-0410-b5e6-96231b3b80d8
* Split part of EvaluateFunction into a new EvaluateBlock method. No functionalityNick Lewycky2012-02-061-57/+95
| | | | | | | change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149861 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach GlobalOpt to handle atomic accesses to globals.Nick Lewycky2012-02-051-13/+40
| | | | | | | | | | | | | | | | | | | | * Most of the transforms come through intact by having each transformed load or store copy the ordering and synchronization scope of the original. * The transform that turns a global only accessed in main() into an alloca (since main is non-recursive) with a store of the initial value uses an unordered store, since it's guaranteed to be the first thing to happen in main. (Threads may have started before main (!) but they can't have the address of a function local before the point in the entry block we insert our code.) * The heap-SRoA transforms are disabled in the face of atomic operations. This can probably be improved; it seems odd to have atomic accesses to an alloca that doesn't have its address taken. AnalyzeGlobal keeps track of the strongest ordering found in any use of the global. This is more information than we need right now, but it's cheap to compute and likely to be useful. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149847 91177308-0d34-0410-b5e6-96231b3b80d8
* Clean up some whitespace and comments. No functionality change.Nick Lewycky2012-02-051-13/+13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149845 91177308-0d34-0410-b5e6-96231b3b80d8
* SwitchInst refactoring.Stepan Dyatkovskiy2012-02-011-1/+2
| | | | | | | | | | | | | | | | | | | | The purpose of refactoring is to hide operand roles from SwitchInst user (programmer). If you want to play with operands directly, probably you will need lower level methods than SwitchInst ones (TerminatorInst or may be User). After this patch we can reorganize SwitchInst operands and successors as we want. What was done: 1. Changed semantics of index inside the getCaseValue method: getCaseValue(0) means "get first case", not a condition. Use getCondition() if you want to resolve the condition. I propose don't mix SwitchInst case indexing with low level indexing (TI successors indexing, User's operands indexing), since it may be dangerous. 2. By the same reason findCaseValue(ConstantInt*) returns actual number of case value. 0 means first case, not default. If there is no case with given value, ErrorIndex will returned. 3. Added getCaseSuccessor method. I propose to avoid usage of TerminatorInst::getSuccessor if you want to resolve case successor BB. Use getCaseSuccessor instead, since internal SwitchInst organization of operands/successors is hidden and may be changed in any moment. 4. Added resolveSuccessorIndex and resolveCaseIndex. The main purpose of these methods is to see how case successors are really mapped in TerminatorInst. 4.1 "resolveSuccessorIndex" was created if you need to level down from SwitchInst to TerminatorInst. It returns TerminatorInst's successor index for given case successor. 4.2 "resolveCaseIndex" converts low level successors index to case index that curresponds to the given successor. Note: There are also related compatability fix patches for dragonegg, klee, llvm-gcc-4.0, llvm-gcc-4.2, safecode, clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149481 91177308-0d34-0410-b5e6-96231b3b80d8
* continue making the world safe for ConstantDataVector. At this point,Chris Lattner2012-01-271-1/+1
| | | | | | | | | we should (theoretically optimize and codegen ConstantDataVector as well as ConstantVector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149116 91177308-0d34-0410-b5e6-96231b3b80d8
* Continue improving support for ConstantDataAggregate, and use theChris Lattner2012-01-261-28/+5
| | | | | | | new methods recently added to (sometimes greatly!) simplify code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149024 91177308-0d34-0410-b5e6-96231b3b80d8
* use Constant::getAggregateElement to simplify a bunch of code.Chris Lattner2012-01-251-36/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148934 91177308-0d34-0410-b5e6-96231b3b80d8
* More dead code removal (using -Wunreachable-code)David Blaikie2012-01-201-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148578 91177308-0d34-0410-b5e6-96231b3b80d8
* PR11705, part 2: globalopt shouldn't put inttoptr/ptrtoint operations into ↵Eli Friedman2012-01-051-10/+20
| | | | | | global initializers if there's an implied extension or truncation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147625 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a few more places where TargetData/TargetLibraryInfo is not being passed.Chad Rosier2011-12-021-2/+5
| | | | | | Add FIXMEs to places that are non-trivial to fix. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145661 91177308-0d34-0410-b5e6-96231b3b80d8
* Last bit of TargetLibraryInfo propagation. Also fixed a case for TargetDataChad Rosier2011-12-011-9/+17
| | | | | | | where it appeared beneficial to pass. More of rdar://10500969 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145630 91177308-0d34-0410-b5e6-96231b3b80d8
* Refactor code from inlining and globalopt that checks whether a function ↵Eli Friedman2011-10-201-1/+1
| | | | | | definition is unused, and enhance it so it can tell that functions which are only used by a blockaddress are in fact dead. This probably doesn't happen much on most code, but the Linux kernel's _THIS_IP_ can trigger this issue with blockaddress. (GlobalDCE can also handle the given tescase, but we only run that at -O3.) Found while looking at PR11180. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142572 91177308-0d34-0410-b5e6-96231b3b80d8
* Stop emitting instructions with the name "tmp" they eat up memory and have ↵Benjamin Kramer2011-09-271-2/+1
| | | | | | | | to be uniqued, without any benefit. If someone prefers %tmp42 to %42, run instnamer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140634 91177308-0d34-0410-b5e6-96231b3b80d8
* Minor comment fixes.Eli Friedman2011-08-161-4/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137693 91177308-0d34-0410-b5e6-96231b3b80d8
* Update inter-procedural optimizations for atomic load/store.Eli Friedman2011-08-151-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137667 91177308-0d34-0410-b5e6-96231b3b80d8
* Add the 'resume' instruction for the new EH rewrite.Bill Wendling2011-07-311-1/+1
| | | | | | | | | | This adds the 'resume' instruction class, IR parsing, and bitcode reading and writing. The 'resume' instruction resumes propagation of an existing (in-flight) exception whose unwinding was interrupted with a 'landingpad' instruction (to be added later). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136589 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r136253, r136263, r136269, r136313, r136325, r136326, r136329, r136338,Bill Wendling2011-07-301-1/+1
| | | | | | | | | r136339, r136341, r136369, r136387, r136392, r136396, r136429, r136430, r136444, r136445, r136446, r136253 pending review. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136556 91177308-0d34-0410-b5e6-96231b3b80d8
* Merge the contents from exception-handling-rewrite to the mainline.Bill Wendling2011-07-271-1/+1
| | | | | | | This adds the new instructions 'landingpad' and 'resume'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136253 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert GetElementPtrInst to use ArrayRef.Jay Foad2011-07-251-3/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135904 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix more MSVC warnings caused by a cases I missed when convertingJay Foad2011-07-221-1/+1
| | | | | | ConstantExpr::getGetElementPtr to use ArrayRef. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135762 91177308-0d34-0410-b5e6-96231b3b80d8
* Make better use of ConstantExpr::getGetElementPtr's InBounds parameter.Jay Foad2011-07-211-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135676 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert ConstantExpr::getGetElementPtr andJay Foad2011-07-211-6/+4
| | | | | | | ConstantExpr::getInBoundsGetElementPtr to use ArrayRef. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135673 91177308-0d34-0410-b5e6-96231b3b80d8
* move tier out of an anonymous namespace, it doesn't make senseChris Lattner2011-07-211-5/+3
| | | | | | | | | to for it to be an an anon namespace and be in a header. Eliminate some extraenous uses of tie. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135669 91177308-0d34-0410-b5e6-96231b3b80d8
* Use ArrayRef in ConstantFoldInstOperands and ConstantFoldCall.Jay Foad2011-07-191-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135477 91177308-0d34-0410-b5e6-96231b3b80d8
* land David Blaikie's patch to de-constify Type, with a few tweaks.Chris Lattner2011-07-181-40/+40
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135375 91177308-0d34-0410-b5e6-96231b3b80d8
* Revamp the "ConstantStruct::get" methods. Previously, these were scatteredChris Lattner2011-06-201-39/+39
| | | | | | | | | | | | | | | | | all over the place in different styles and variants. Standardize on two preferred entrypoints: one that takes a StructType and ArrayRef, and one that takes StructType and varargs. In cases where there isn't a struct type convenient, we now add a ConstantStruct::getAnon method (whose name will make more sense after a few more patches land). It would be "really really nice" if the ConstantStruct::get and ConstantVector::get methods didn't make temporary std::vectors. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133412 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't crash owhen ComputeLoadResult can't compute the result of the load.Nick Lewycky2011-05-291-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132290 91177308-0d34-0410-b5e6-96231b3b80d8
* Obey the isVolatile bit on memory intrinsics when analyzing uses of a globalNick Lewycky2011-05-291-5/+19
| | | | | | | | | | variable. Noticed by inspection. Simulate memset in EvaluateFunction where the target of the memset and the value we're setting are both the null value. Fixes PR10047! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132288 91177308-0d34-0410-b5e6-96231b3b80d8
* fix PR9856, an incorrectly conservative assertion: a global can beChris Lattner2011-05-221-3/+3
| | | | | | | "stored once" even if its address is compared. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131849 91177308-0d34-0410-b5e6-96231b3b80d8
* Just because a GlobalVariable's initializer is [N x { i32, void ()* }] doesn'tNick Lewycky2011-04-111-7/+10
| | | | | | | | | | | | | mean that it has to be ConstantArray of ConstantStruct. We might have ConstantAggregateZero, at either level, so don't crash on that. Also, semi-deprecate the sentinal value. The linker isn't aware of sentinals so we end up with the two lists appended, each with their "sentinals" on them. Different parts of LLVM treated sentinals differently, so make them all just ignore the single entry and continue on with the rest of the list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129307 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't include Operator.h from InstrTypes.h.Jay Foad2011-04-111-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129271 91177308-0d34-0410-b5e6-96231b3b80d8
* Add back a couple checks removed by r129128; the fact that an intitializerEli Friedman2011-04-091-4/+6
| | | | | | | | | is an array of structures doesn't imply it's a ConstantArray of ConstantStruct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129207 91177308-0d34-0410-b5e6-96231b3b80d8
* llvm.global_[cd]tor is defined to be either external, or appending with an arrayNick Lewycky2011-04-081-20/+5
| | | | | | | | of { i32, void ()* }. Teach the verifier to verify that, deleting copies of checks strewn about. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129128 91177308-0d34-0410-b5e6-96231b3b80d8
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