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* Add a new function attribute 'cold' to functions.Diego Novillo2013-05-241-0/+81
| | | | | | | | | | | Other than recognizing the attribute, the patch does little else. It changes the branch probability analyzer so that edges into blocks postdominated by a cold function are given low weight. Added analysis and code generation tests. Added documentation for the new attribute. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182638 91177308-0d34-0410-b5e6-96231b3b80d8
* isKnownToBeAPowerOfTwo: (X & Y) + Y is a power of 2 or zero if y is also.David Majnemer2013-05-181-0/+11
| | | | | | | | This is useful if something that looks like (x & (1 << y)) ? 64 : 32 is the divisor in a modulo operation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182200 91177308-0d34-0410-b5e6-96231b3b80d8
* Respect the 'nobuiltin' attribute when determining if a call is to a memory ↵Richard Smith2013-05-161-0/+3
| | | | | | builtin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181978 91177308-0d34-0410-b5e6-96231b3b80d8
* Use only explicit bool conversion operatorsDavid Blaikie2013-05-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | BitVector/SmallBitVector::reference::operator bool remain implicit since they model more exactly a bool, rather than something else that can be boolean tested. The most common (non-buggy) case are where such objects are used as return expressions in bool-returning functions or as boolean function arguments. In those cases I've used (& added if necessary) a named function to provide the equivalent (or sometimes negative, depending on convenient wording) test. One behavior change (YAMLParser) was made, though no test case is included as I'm not sure how to reach that code path. Essentially any comparison of llvm::yaml::document_iterators would be invalid if neither iterator was at the end. This helped uncover a couple of bugs in Clang - test cases provided for those in a separate commit along with similar changes to `operator bool` instances in Clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181868 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix unchecked uses of DominatorTree in MemoryDependenceAnalysis.Matt Arsenault2013-05-061-5/+20
| | | | | | Use unknown results for places where it would be needed git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181176 91177308-0d34-0410-b5e6-96231b3b80d8
* RegionInfo: Do not crash if unreachable block is foundTobias Grosser2013-05-031-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181025 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch breaks up Wrap.h so that it does not have to include all of Filip Pizlo2013-05-012-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | the things, and renames it to CBindingWrapping.h. I also moved CBindingWrapping.h into Support/. This new file just contains the macros for defining different wrap/unwrap methods. The calls to those macros, as well as any custom wrap/unwrap definitions (like for array of Values for example), are put into corresponding C++ headers. Doing this required some #include surgery, since some .cpp files relied on the fact that including Wrap.h implicitly caused the inclusion of a bunch of other things. This also now means that the C++ headers will include their corresponding C API headers; for example Value.h must include llvm-c/Core.h. I think this is harmless, since the C API headers contain just external function declarations and some C types, so I don't believe there should be any nasty dependency issues here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180881 91177308-0d34-0410-b5e6-96231b3b80d8
* Struct-path aware TBAA: change the format of TBAAStructType node.Manman Ren2013-04-271-13/+30
| | | | | | | | | We switch the order of offset and field type to make TBAAStructType node (name, parent node, offset) similar to scalar TBAA node (name, parent node). TypeIsImmutable is added to TBAAStructTag node. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180654 91177308-0d34-0410-b5e6-96231b3b80d8
* Struct-path aware TBAA: update getMostGenericTBAA Manman Ren2013-04-221-2/+60
| | | | | | | | | | | The tag is of type TBAANode when flag EnableStructPathTBAA is off. Move implementation of MDNode::getMostGenericTBAA to TypeBasedAliasAnalysis.cpp since it depends on how to interprete the MDNodes for scalar TBAA and struct-path aware TBAA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180068 91177308-0d34-0410-b5e6-96231b3b80d8
* Move C++ code out of the C headers and into either C++ headersEric Christopher2013-04-222-0/+2
| | | | | | | or the C++ files themselves. This enables people to use just a C compiler to interoperate with LLVM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180063 91177308-0d34-0410-b5e6-96231b3b80d8
* ConstantFolding: ComputeMaskedBits wants the scalar size for vectors.Benjamin Kramer2013-04-191-1/+1
| | | | | | Fixes PR15791. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179859 91177308-0d34-0410-b5e6-96231b3b80d8
* A limit of 500 was still a bit too high for some tests.Bill Wendling2013-04-171-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PR15000 has a testcase where the time to compile was bordering on 30s. When I dropped the limit value to 100, it became a much more managable 6s. The compile time seems to increase in a roughly linear fashion based on increasing the limit value. (See the runtimes below.) So, let's lower the limit to 100 so that they can get a more reasonable compile time. Limit Value Time ----------- ---- 10 0.9744s 20 1.8035s 30 2.3618s 40 2.9814s 50 3.6988s 60 4.5486s 70 4.9314s 80 5.8012s 90 6.4246s 100 7.0852s 110 7.6634s 120 8.3553s 130 9.0552s 140 9.6820s 150 9.8804s 160 10.8901s 170 10.9855s 180 12.0114s 190 12.6816s 200 13.2754s 210 13.9942s 220 13.8097s 230 14.3272s 240 15.7753s 250 15.6673s 260 16.0541s 270 16.7625s 280 17.3823s 290 18.8213s 300 18.6120s 310 20.0333s 320 19.5165s 330 20.2505s 340 20.7068s 350 21.1833s 360 22.9216s 370 22.2152s 380 23.9390s 390 23.4609s 400 24.0426s 410 24.6410s 420 26.5208s 430 27.7155s 440 26.4142s 450 28.5646s 460 27.3494s 470 29.7255s 480 29.4646s 490 30.5001s git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179713 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a scalability issue with complex ConstantExprs.Benjamin Kramer2013-04-131-12/+24
| | | | | | | | | | | | | | | This is basically the same fix in three different places. We use a set to avoid walking the whole tree of a big ConstantExprs multiple times. For example: (select cmp, (add big_expr 1), (add big_expr 2)) We don't want to visit big_expr twice here, it may consist of thousands of nodes. The testcase exercises this by creating an insanely large ConstantExprs out of a loop. It's questionable if the optimizer should ever create those, but this can be triggered with real C code. Fixes PR15714. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179458 91177308-0d34-0410-b5e6-96231b3b80d8
* Aliasing rules for struct-path aware TBAA.Manman Ren2013-04-111-0/+136
| | | | | | | | Added PathAliases to check if two struct-path tags can alias. Added command line option -struct-path-tbaa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179337 91177308-0d34-0410-b5e6-96231b3b80d8
* RegionInfo: Add helpers to replace entry/exit recursivelyTobias Grosser2013-04-101-0/+32
| | | | | | Contributed by: Star Tan <tanmx_star@yeah.net> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179157 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r176408 and r176407 to address PR15540.Nadav Rotem2013-04-092-50/+42
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179111 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert 179071 because it is not the right way to support non standard ↵Nadav Rotem2013-04-091-0/+8
| | | | | | new/new[] operators. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179084 91177308-0d34-0410-b5e6-96231b3b80d8
* c++ new operators are not malloc-like functions because they do not return ↵Nadav Rotem2013-04-081-8/+0
| | | | | | | | | | uninitialized memory. Users may overide new-operators and implement any function that they like. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179071 91177308-0d34-0410-b5e6-96231b3b80d8
* InstructionSimplify.cpp: Fix a ligature, "fi", to get rid of utf8 in comment.NAKAMURA Takumi2013-04-081-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179066 91177308-0d34-0410-b5e6-96231b3b80d8
* CostModel: Add parameter to instruction cost to further classify operand valuesArnold Schwaighofer2013-04-042-4/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | On certain architectures we can support efficient vectorized version of instructions if the operand value is uniform (splat) or a constant scalar. An example of this is a vector shift on x86. We can efficiently support for (i = 0 ; i < ; i += 4) w[0:3] = v[0:3] << <2, 2, 2, 2> but not for (i = 0; i < ; i += 4) w[0:3] = v[0:3] << x[0:3] This patch adds a parameter to getArithmeticInstrCost to further qualify operand values as uniform or uniform constant. Targets can then choose to return a different cost for instructions with such operand values. A follow-up commit will test this feature on x86. radar://13576547 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178807 91177308-0d34-0410-b5e6-96231b3b80d8
* Build fixes for STLPort + GCCMatt Arsenault2013-03-292-6/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178356 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix loop styleMatt Arsenault2013-03-291-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178355 91177308-0d34-0410-b5e6-96231b3b80d8
* BasicAA: Only query twice if the result of the more general query was MayAliasArnold Schwaighofer2013-03-261-5/+5
| | | | | | | | | | | | | | This is a compile time optimization. Before the patch we would do two traversals on each call to aliasGEP - one with a set size parameter one with UnknownSize. We can do better by first checking the result of the alias query with UnknownSize. Only if this one returns MayAlias do we query a second time using size and type. This recovers an about 7% compile time regression on spec/ammp. radar://12349960 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178045 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix SCEV forgetMemoizedResults should search and destroy backedge exprs.Andrew Trick2013-03-261-0/+30
| | | | | | | | | | | | | | | Fixes PR15570: SEGV: SCEV back-edge info invalid after dead code removal. Indvars creates a SCEV expression for the loop's back edge taken count, then determines that the comparison is always true and removes it. When loop-unroll asks for the expression, it contains a NULL SCEVUnknkown (as a CallbackVH). forgetMemoizedResults should invalidate the loop back edges expression. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177986 91177308-0d34-0410-b5e6-96231b3b80d8
* Support in AAEvaluator to print alias queries of loads/stores with TBAA tags.Manman Ren2013-03-221-0/+72
| | | | | | | | | | Add "evaluate-tbaa" to print alias queries of loads/stores. Alias queries between pointers do not include TBAA tags. Add testing case for "placement new". TBAA currently says NoAlias. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177772 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove 'else' after 'return'.Jakub Staszak2013-03-201-2/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177607 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove trailing spaces.Jakub Staszak2013-03-201-133/+133
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177584 91177308-0d34-0410-b5e6-96231b3b80d8
* Check whether a pointer is non-null (isKnownNonNull) in isKnownNonZero.Manman Ren2013-03-181-0/+2
| | | | | | | | | This handles the case where we have an inbounds GEP with alloca as the pointer. This fixes the regression in PR12750 and rdar://13286434. Note that we can also fix this by handling some GEP cases in isKnownNonNull. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177321 91177308-0d34-0410-b5e6-96231b3b80d8
* Small fix for cost analysis of ptrtoint.Patrik Hagglund2013-03-121-2/+2
| | | | | | This seems to be a "copy-paste error" introducecd in r156140. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176863 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unneeded #includes. Use forward declarations instead.Jakub Staszak2013-03-101-0/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176783 91177308-0d34-0410-b5e6-96231b3b80d8
* Early exit from getAllocationData() and isFreeCall() for intrinsics.Michael Ilseman2013-03-081-1/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176722 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove trailing whitespaceMichael Ilseman2013-03-081-5/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176720 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove -print-dbginfo as it is unused & bitrotten.David Blaikie2013-03-083-226/+0
| | | | | | | | This pass hasn't been touched in two years & would fail with assertions against the current debug info metadata format (the only test case for it still uses a many-versions old debug info metadata format) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176707 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify code. No functionality change.Jakub Staszak2013-03-071-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176646 91177308-0d34-0410-b5e6-96231b3b80d8
* Change NULL to 0.Jakub Staszak2013-03-071-8/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176642 91177308-0d34-0410-b5e6-96231b3b80d8
* ArrayRef ca accept one element. Simplify code a little bit, also it matches nowJakub Staszak2013-03-071-3/+5
| | | | | | | coding in the other places of the file. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176641 91177308-0d34-0410-b5e6-96231b3b80d8
* Memory Dependence Analysis (not mem-dep test) take advantage of ↵Shuxin Yang2013-03-061-4/+14
| | | | | | | | | | | | | | | | | "invariant.load" metadata. The "invariant.load" metadata indicates the memory unit being accessed is immutable. A load annotated with this metadata can be moved across any store. As I am not sure if it is legal to move such loads across barrier/fence, this change dose not allow such transformation. rdar://11311484 Thank Arnold for code review. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176562 91177308-0d34-0410-b5e6-96231b3b80d8
* Use dyn_cast instead of isa && cast. No functionality change.Jakub Staszak2013-03-061-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176537 91177308-0d34-0410-b5e6-96231b3b80d8
* recommit r172363 & r171325 (reverted in r172756)Nuno Lopes2013-03-021-12/+29
| | | | | | | | This adds minimalistic support for PHI nodes to llvm.objectsize() evaluation fingers crossed so that it does break clang boostrap again.. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176408 91177308-0d34-0410-b5e6-96231b3b80d8
* add getUnderlyingObjectSize()Nuno Lopes2013-03-022-30/+21
| | | | | | | this is similar to getObjectSize(), but doesnt subtract the offset tweak the BasicAA code accordingly (per PR14988) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176407 91177308-0d34-0410-b5e6-96231b3b80d8
* Cost model support for lowered math builtins.Benjamin Kramer2013-02-281-0/+11
| | | | | | | | | | We make the cost for calling libm functions extremely high as emitting the calls is expensive and causes spills (on x86) so performance suffers. We still vectorize important calls like ceilf and friends on SSE4.1. and fabs. Differential Revision: http://llvm-reviews.chandlerc.com/D466 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176287 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a problem in alias analysis. It is about the misinterpretation of "Object".Shuxin Yang2013-02-281-0/+29
| | | | | | | | | | | | | | | | | | This problem is exposed by r171325 which is already reverted. It is rather hard to fabricate a testing case without it. r171325 should *NOT* be resurrected as it has a potential problem although this problem dosen't directly contribute to PR14988. The bug is tracked by: - rdar://13063553, and - http://llvm.org/bugs/show_bug.cgi?id=14988 Thank Arnold for coming up a better solution to this problem. After comparing this solution and my original proposal, I decided to ditch mine. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176225 91177308-0d34-0410-b5e6-96231b3b80d8
* Constant fold vector bitcasts of halves similarly to how floats and doubles ↵Michael Ilseman2013-02-261-6/+8
| | | | | | are folded. Test case included. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176131 91177308-0d34-0410-b5e6-96231b3b80d8
* Unify clang/llvm attributes for asan/tsan/msan (LLVM part)Kostya Serebryany2013-02-261-2/+2
| | | | | | | | | | | | | | | | | | | | These are two related changes (one in llvm, one in clang). LLVM: - rename address_safety => sanitize_address (the enum value is the same, so we preserve binary compatibility with old bitcode) - rename thread_safety => sanitize_thread - rename no_uninitialized_checks -> sanitize_memory CLANG: - add __attribute__((no_sanitize_address)) as a synonym for __attribute__((no_address_safety_analysis)) - add __attribute__((no_sanitize_thread)) - add __attribute__((no_sanitize_memory)) for S in address thread memory If -fsanitize=S is present and __attribute__((no_sanitize_S)) is not set llvm attribute sanitize_S git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176075 91177308-0d34-0410-b5e6-96231b3b80d8
* Formatting.Chad Rosier2013-02-201-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175692 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach the DataLayout aware constant folder to be much more aggressive towardsNick Lewycky2013-02-141-8/+30
| | | | | | | 'and' instructions. This is a pattern that shows up a lot in ubsan binaries. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175128 91177308-0d34-0410-b5e6-96231b3b80d8
* Metadata for annotating loops as parallel. The first consumer for this Pekka Jaaskelainen2013-02-131-0/+50
| | | | | | | | | | metadata is the loop vectorizer. See the documentation update for more info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175060 91177308-0d34-0410-b5e6-96231b3b80d8
* [tsan] disable load widening in ThreadSanitizer modeKostya Serebryany2013-02-131-0/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175034 91177308-0d34-0410-b5e6-96231b3b80d8
* Cost model: Add check for reverse shuffles to CostModel analysisArnold Schwaighofer2013-02-121-0/+18
| | | | | | | | | | Check for reverse shuffles in the CostModel analysis pass and query TargetTransform info accordingly. This allows us we can write test cases for reverse shuffles. radar://13171406 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174932 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Add LLVMContext::emitWarning methods and use them. ↵Bob Wilson2013-02-082-11/+10
| | | | | | | | | | | | | <rdar://problem/12867368>" This reverts r171041. This was a nice idea that didn't work out well. Clang warnings need to be associated with warning groups so that they can be selectively disabled, promoted to errors, etc. This simplistic patch didn't allow for that. Enhancing it to provide some way for the backend to specify a front-end warning type seems like overkill for the few uses of this, at least for now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174748 91177308-0d34-0410-b5e6-96231b3b80d8
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