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2012-05-31revamp BoundsChecking considerably:Nuno Lopes
- compute size & offset at the same time. The side-effects of this are that we now support negative GEPs. It's now approaching a phase that it can be reused by other passes (e.g., lowering of the objectsize intrinsic) - use APInt throughout to handle wrap-arounds - add support for PHI instrumentation - add a cache (required for recursive PHIs anyway) - remove hoisting support for now, since it was wrong in a few cases sorry for the churn here.. tests will follow soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157775 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-31Enhance the sinking code to handle diamond patterns. Patch byDuncan Sands
Carlo Alberto Ferraris. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157736 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-30[asan] instrument cmpxchg and atomicrmwKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157683 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-29bounds checking:Nuno Lopes
- hoist checks out of loops where SCEV is smart enough - add additional statistics to measure how much we loose for not supporting interprocedural and pointers loaded from memory git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157649 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-29ConstantRangesSet renamed to IntegersSubset. CRSBuilder renamed to ↵Stepan Dyatkovskiy
IntegersSubsetMapping. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157612 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-28Fix suspicous hasOneUse() check, found by PVS Studio (PR12357).Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157592 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-28InstCombine: Fix infinite loop when encountering switch on trivial icmp.Benjamin Kramer
The test case feeds the following into InstCombine's visitSelect: %tobool8 = icmp ne i32 0, 0 %phitmp = select i1 %tobool8, i32 3, i32 0 Then instcombine replaces the right side of the switch with 0, doesn't notice that nothing changes and tries again indefinitely. This fixes PR12897. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157587 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-28PR1255: Case RangesStepan Dyatkovskiy
Implemented IntItem - the wrapper around APInt. Why not to use APInt item directly right now? 1. It will very difficult to implement case ranges as series of small patches. We got several large and heavy patches. Each patch will about 90-120 kb. If you replace ConstantInt with APInt in SwitchInst you will need to changes at the same time all Readers,Writers and absolutely all passes that uses SwitchInst. 2. We can implement APInt pool inside and save memory space. E.g. we use several switches that works with 256 bit items (switch on signatures, or strings). We can avoid value duplicates in this case. 3. IntItem can be easyly easily replaced with APInt. 4. Currenly we can interpret IntItem both as ConstantInt and as APInt. It allows to provide SwitchInst methods that works with ConstantInt for non-updated passes. Why I need it right now? Currently I need to update SimplifyCFG pass (EqualityComparisons). I need to work with APInts directly a lot, so peaces of code ConstantInt *V = ...; if (V->getValue().ugt(AnotherV->getValue()) { ... } will look awful. Much more better this way: IntItem V = ConstantIntVal->getValue(); if (AnotherV < V) { } Of course any reviews are welcome. P.S.: I'm also going to rename ConstantRangesSet to IntegersSubset, and CRSBuilder to IntegersSubsetMapping (allows to map individual subsets of integers to the BasicBlocks). Since in future these classes will founded on APInt, it will possible to use them in more generic ways. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157576 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-28Implement the indirect counter increment code in a better way. Instead ofBill Wendling
replicating the code for every place it's needed, we instead generate a function that does that for us. This function is local to the executable, so there shouldn't be any writing violations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157564 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-28switch AttrListPtr::get to take an ArrayRef, simplifying a lot of clients.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157556 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-27PR12967: Don't crash when trying to fold a shift that's larger than the ↵Benjamin Kramer
type's size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157548 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-27Reimplement the intrinsic verifier to use the same table as ↵Chris Lattner
Intrinsic::getDefinition, making it stronger and more sane. Delete the code from tblgen that produced the old code. Besides being a path forward in intrinsic sanity, this also eliminates a bunch of machine generated code that was compiled into Function.o git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157545 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-26Since commit 157467, if reassociate isn't actually going to change an expressionDuncan Sands
then it doesn't alter the instructions composing it, however it would continue to move the instructions to just before the expression root. Ensure it doesn't move them either, so now it really does nothing if there is nothing to do. That commit also ensured that nsw etc flags weren't cleared if the expression was not being changed. Tweak this a bit so that it doesn't clear flags on the initial part of a computation either if that part didn't change but later bits did. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157518 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-26SimplifyCFG: Turn the ad-hoc std::pair that represents switch cases into an ↵Benjamin Kramer
explicit struct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157516 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-26Add support for branch weight metadata to MDBuilder and use it in various ↵Benjamin Kramer
places. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157515 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-26Move this debug statement earlier so it is easy to see the order inDuncan Sands
which operands come flying out of the linearization stage. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157512 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-25The llvm_gcda_increment_indirect_counter function writes to the arguments thatBill Wendling
are passed in. However, those arguments may be in a write-protected area, as far as the runtime library is concerned. For instance, the data could be placed into a 'linkedit' section, which isn't writable. Emit the code from llvm_gcda_increment_indirect_counter directly into the function instead. Note: The code for this is ugly, and can lead to bloat. We should look into simplifying this code instead of having all of these branches. <rdar://problem/11181370> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157505 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-25bounds checking: add support for byval argumentsNuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157498 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-25boundschecking:Nuno Lopes
add support for select add experimental support for alloc_size metadata git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157481 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-25Make the reassociation pass more powerful so that it can handle expressionsDuncan Sands
with arbitrary topologies (previously it would give up when hitting a diamond in the use graph for example). The testcase from PR12764 is now reduced from a pile of additions to the optimal 1617*%x0+208. In doing this I changed the previous strategy of dropping all uses for expression leaves to one of dropping all but one use. This works out more neatly (but required a bunch of tweaks) and is also safer: some recently fixed bugs during recursive linearization were because the linearization code thinks it completely owns a node if it has no uses outside the expression it is linearizing. But if the node was also in another expression that had been linearized (and thus all uses of the node from that expression dropped) then the conclusion that it is completely owned by the expression currently being linearized is wrong. Keeping one use from within each linearized expression avoids this kind of mistake. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157467 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-24PR1255 related changes (case ranges):Stepan Dyatkovskiy
LowerSwitch::Clusterify : main functinality was replaced with CRSBuilder::optimize, so big part of Clusterify's code was reduced. test/Transform/LowerSwitch/feature.ll - this test was refactored: grep + count was replaced with FileCheck usage. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157384 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-23BoundsChecking: add a couple of simple tests and fix a bug in branch emitionNuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157329 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-23Fix the inliner so that the optsize function attribute don't alter thePatrik Hägglund
inline threshold if the global inline threshold is lower (as for -Oz). Reviewed by Chandler Carruth and Bill Wendling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157323 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-23Use zero-based shadow by default on Android.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157317 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-23PR1255(case ranges) related changes in Local Transformations.Stepan Dyatkovskiy
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157315 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-22address some of John Criswell's commentsNuno Lopes
teach computeAllocSize about realloc, reallocf, and valloc git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157298 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-22hopefully fix the CMake build. sorry for breakageNuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157264 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-22add a new pass to instrument loads and stores for run-time bounds checkingNuno Lopes
move EmitGEPOffset from InstCombine to Transforms/Utils/Local.h (a draft of this) patch reviewed by Andrew, thanks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157261 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-22revert my previous patches that introduced an additional parameter to the ↵Nuno Lopes
objectsize intrinsic. After a lot of discussion, we realized it's not the best option for run-time bounds checking git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157255 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-22Fix PR12858, a crash due to GVN's PRE not fully removing an instruction from theDuncan Sands
leader table. That's because it wasn't expecting instructions to turn up as leader for a value number that is not its own, but equality propagation could create this situation. One solution is to have the leader table use a WeakVH but this slows down GVN by about 5%. Instead just have equality propagation not add instructions to the leader table, only constants and arguments. In theory this might cause GVN to run more (each time it changes something it runs again) but it doesn't seem to occur enough to cause a slow down. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157251 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-21Mark an unreachable region of code with llvm_unreachable.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157197 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-20Do not pass an invalid domtree to SimplifyInstruction fromPeter Collingbourne
LoopUnswitch. Fixes PR12887. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157140 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-19Do not eliminate allocas whose alignment exceeds that of thePeter Collingbourne
copied-in constant, as a subsequent user may rely on over alignment. Fixes PR12885. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157134 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-18Fix replacing all the users of objc weak runtime routinesDan Gohman
when deleting them. rdar://11434915. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157080 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-15Teach SimplifyLibCalls about stpcpy.David Majnemer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156815 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-14Move the capture analysis from MemoryDependencyAnalysis to a more general placeChad Rosier
so that it can be reused in MemCpyOptimizer. This analysis is needed to remove an unnecessary memcpy when returning a struct into a local variable. rdar://11341081 PR12686 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156776 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-12Teach Function::hasAddressTaken that BlockAddress doesn't really takeJay Foad
the address of a function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156703 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-11objectsize: add a few more tests and fix a bugNuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156625 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-11Fix a minor logic mistake transforming compares in instcombine. PR12514.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156600 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-10objectsize: add support for GEPs with non-constant indexesNuno Lopes
add an additional parameter to InstCombiner::EmitGEPOffset() to force it to *not* emit operations with NUW flag git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156585 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-10Teach DeadStoreElimination to eliminate exit-block stores with phi addresses.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156558 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-10teach DSE and isInstructionTriviallyDead() about callocNuno Lopes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156553 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-09Fix the objc_storeStrong recognizer to stop before walking off theDan Gohman
end of a basic block if there's no store. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156520 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-09objectsize:Nuno Lopes
refactor code a bit to enable future changes to support run-time information add support to compute allocation sizes at run-time if penalty > 1 (e.g., malloc(x), calloc(x, y), and VLAs) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156515 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-09Remove unused variable to get rid of warning.Craig Topper
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156466 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-08Miscellaneous accumulated cleanups.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156445 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-08Fix objc_storeStrong pattern matching to catch a potential use of theDan Gohman
old value after the store but before it is released. This fixes rdar:/11116986. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156442 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-08Calling ReassociateExpression recursively is extremely dangerous since it willDuncan Sands
replace the operands of expressions with only one use with undef and generate a new expression for the original without using RAUW to update the original. Thus any copies of the original expression held in a vector may end up referring to some bogus value - and using a ValueHandle won't help since there is no RAUW. There is already a mechanism for getting the effect of recursion non-recursively: adding the value to be recursed on to RedoInsts. But it wasn't being used systematically. Have various places where recursion had snuck in at some point use the RedoInsts mechanism instead. Fixes PR12169. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156379 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-08Allow NULL LoopPassManager argument in UnrollLoop. PR12734.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156358 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-07Teach reassociate to commute FMul's and FAdd's in order to canonicalize the ↵Owen Anderson
order of their operands across instructions. This allows for greater CSE opportunities. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156323 91177308-0d34-0410-b5e6-96231b3b80d8
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