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* When the inliner merges allocas, it must keep the larger alignmentHal Finkel2013-07-16
| | | | | | | | | | | | For safety, the inliner cannot decrease the allignment on an alloca when merging it with another. I've included two variants of the test case for this: one with DataLayout available, and one without. When DataLayout is not available, if only one of the allocas uses the default alignment (getAlignment() == 0), then they cannot be safely merged. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186425 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix commentEli Bendersky2013-07-08
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185888 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix annotation of unlink. Should fix builder.Nick Lewycky2013-07-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185738 91177308-0d34-0410-b5e6-96231b3b80d8
* Extend 'readonly' and 'readnone' to work on function arguments as well asNick Lewycky2013-07-06
| | | | | | | | functions. Make the function attributes pass add it to known library functions and when it can deduce it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185735 91177308-0d34-0410-b5e6-96231b3b80d8
* Tabs to spaces. No functionality change.Nick Lewycky2013-07-04
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185612 91177308-0d34-0410-b5e6-96231b3b80d8
* Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid ↵Craig Topper2013-07-04
| | | | | | specifying the vector size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185606 91177308-0d34-0410-b5e6-96231b3b80d8
* Added support in FunctionAttrs for adding relevant function/argument ↵Michael Gottesman2013-07-03
| | | | | | | | | | attributes for the posix call gettimeofday. This implies annotating it as nounwind and its arguments as nocapture. To be conservative, we do not annotate the arguments with noalias since some platforms do not have restrict on the declaration for gettimeofday. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185502 91177308-0d34-0410-b5e6-96231b3b80d8
* Add missing break statements. Noticed by inspection.Nick Lewycky2013-07-02
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185414 91177308-0d34-0410-b5e6-96231b3b80d8
* DeadArgumentElimination: keep return value on functions that have a live ↵Stephen Lin2013-06-30
| | | | | | argument with the 'returned' attribute (rather than generate invalid IR); however, if both can be eliminated, both will be git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185290 91177308-0d34-0410-b5e6-96231b3b80d8
* Debug Info: clean up usage of Verify.Manman Ren2013-06-28
| | | | | | | | | | | | No functionality change. It should suffice to check the type of a debug info metadata, instead of calling Verify. For cases where we know the type of a DI metadata, use assert. Also update testing cases to make them conform to the format of DI classes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185135 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a flag to defer vectorization into a phase after the inliner and itsChandler Carruth2013-06-24
| | | | | | | | | | | | | CGSCC pass manager. This should insulate the inlining decisions from the vectorization decisions, however it may have both compile time and code size problems so it is just an experimental option right now. Adding this based on a discussion with Arnold and it seems at least worth having this flag for us to both run some experiments to see if this strategy is workable. It may solve some of the regressions seen with the loop vectorizer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184698 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "FunctionAttrs: Merge attributes once instead of doing it for every ↵Benjamin Kramer2013-06-22
| | | | | | | | argument." It doesn't work as I intended it to. This reverts commit r184638. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184641 91177308-0d34-0410-b5e6-96231b3b80d8
* FunctionAttrs: Merge attributes once instead of doing it for every argument.Benjamin Kramer2013-06-22
| | | | | | It has become an expensive operation. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184638 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the simplify-libcalls pass (finally)Meador Inge2013-06-20
| | | | | | | | | | | This commit completely removes what is left of the simplify-libcalls pass. All of the functionality has now been migrated to the instcombine and functionattrs passes. The following C API functions are now NOPs: 1. LLVMAddSimplifyLibCallsPass 2. LLVMPassManagerBuilderSetDisableSimplifyLibCalls git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184459 91177308-0d34-0410-b5e6-96231b3b80d8
* Disable vectorization for -Oz.Nadav Rotem2013-06-17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184089 91177308-0d34-0410-b5e6-96231b3b80d8
* Enable the loop vectorizer by default for -Os and -O2.Nadav Rotem2013-06-17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184084 91177308-0d34-0410-b5e6-96231b3b80d8
* PruneEH: Only merge attribute sets when used. No functionality change.Benjamin Kramer2013-06-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184041 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix DeleteDeadVarargs not to crash on functions referenced by BlockAddressesDerek Schuff2013-06-13
| | | | | | | | | | | | | | | This pass was assuming that if hasAddressTaken() returns false for a function, the function's only uses are call sites. That's not true because there can be references by BlockAddresses too. Fix the pass to handle this case. Fix BlockAddress::replaceUsesOfWithOnConstant() to allow a function's type to be changed by RAUW'ing the function with a bitcast of the recreated function. Patch by Mark Seaborn. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183933 91177308-0d34-0410-b5e6-96231b3b80d8
* Always remove an alias when we rename the target.Rafael Espindola2013-06-12
| | | | | | Should fix the dragonegg build bots. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183845 91177308-0d34-0410-b5e6-96231b3b80d8
* Change how globalopt handles aliases in llvm.used.Rafael Espindola2013-06-11
| | | | | | | | | | | | | | | | | | | | | | | | Instead of a custom implementation of replaceAllUsesWith, we just call replaceAllUsesWith and recreate llvm.used and llvm.compiler-used. This change is particularity interesting because it makes llvm see through what clang is doing with static used functions in extern "C" contexts. With this change, running clang -O2 in extern "C" { __attribute__((used)) static void foo() {} } produces @llvm.used = appending global [1 x i8*] [i8* bitcast (void ()* @foo to i8*)], section "llvm.metadata" define internal void @foo() #0 { entry: ret void } git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183756 91177308-0d34-0410-b5e6-96231b3b80d8
* Make DeadArgumentElimination more conservative on variadic functionsTim Northover2013-06-09
| | | | | | | Variadic functions are particularly fragile in the face of ABI changes, so this limits how much the pass changes them git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183625 91177308-0d34-0410-b5e6-96231b3b80d8
* Jeffrey Yasskin volunteered to benchmark the vectorizer on -O2 or -Os when ↵Nadav Rotem2013-06-06
| | | | | | compiling chrome. This patch adds a new flag to enable vectorization on all levels and not only on -O3. It should go away once we make a decision. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183456 91177308-0d34-0410-b5e6-96231b3b80d8
* Move getRealLinkageName to a common place and remove all the duplicates of it.Benjamin Kramer2013-06-01
| | | | | | Also simplify code a bit while there. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183076 91177308-0d34-0410-b5e6-96231b3b80d8
* GlobalOpt: fix an issue where CXAAtExitFn points to a deleted function.Manman Ren2013-05-14
| | | | | | | | | | | | CXAAtExitFn was set outside a loop and before optimizations where functions can be deleted. This patch will set CXAAtExitFn inside the loop and after optimizations. Seg fault when running LTO because of accesses to a deleted function. rdar://problem/13838828 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181838 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't replace an alias in llvm.used with its target.Rafael Espindola2013-05-09
| | | | | | | When we replace an internal alias with its target, be careful not to replace the entry in llvm.used (and llvm.compiler_used). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181524 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix const merging when an alias of a const is llvm.used.Rafael Espindola2013-05-06
| | | | | | | We used to disable constant merging not only if a constant is llvm.used, but also if an alias of a constant is llvm.used. This change fixes that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181175 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch breaks up Wrap.h so that it does not have to include all of Filip Pizlo2013-05-01
| | | | | | | | | | | | | | | | | | | | | | | | | | 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
* Move C++ code out of the C headers and into either C++ headersEric Christopher2013-04-22
| | | | | | | 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
* Clarify that llvm.used can contain aliases.Rafael Espindola2013-04-22
| | | | | | | Also add a check for llvm.used in the verifier and simplify clients now that they can assume they have a ConstantArray. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180019 91177308-0d34-0410-b5e6-96231b3b80d8
* MergeFunc: Make pointer and integer types generate the same hash.Benjamin Kramer2013-04-19
| | | | | | | | | The logic that actually compares the types considers pointers and integers the same if they are of the same size. This created a strange mismatch between hash and reality and made the test case for this fail on some platforms (yay, test cases). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179905 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement a better fix for PR15185.Bill Wendling2013-04-18
| | | | | | | | If the return type is a pointer and the call returns an integer, then do the inttoptr convertions. And vice versa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179817 91177308-0d34-0410-b5e6-96231b3b80d8
* We are not able to bitcast a pointer to an integral value.Bill Wendling2013-04-15
| | | | | | | | | Two return types are not equivalent if one is a pointer and the other is an integral. This is because we cannot bitcast a pointer to an integral value. PR15185 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179569 91177308-0d34-0410-b5e6-96231b3b80d8
* SLPVectorizer: Make it a function pass and add code for hoisting the ↵Nadav Rotem2013-04-15
| | | | | | vector-gather sequence out of loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179562 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an option -vectorize-slp-aggressive for running the BB vectorizer. Make ↵Nadav Rotem2013-04-15
| | | | | | -fslp-vectorize run the slp-vectorizer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179508 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename the slp-vectorizer clang/llvm flags. No functionality change.Nadav Rotem2013-04-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179505 91177308-0d34-0410-b5e6-96231b3b80d8
* GlobalDCE: Fix an oversight in my last commit that could lead to crashes.Benjamin Kramer2013-04-13
| | | | | | There is a Constant with non-constant operands: blockaddress. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179460 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a scalability issue with complex ConstantExprs.Benjamin Kramer2013-04-13
| | | | | | | | | | | | | | | 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
* Use a worklist to avoid a sneaky iterator invalidation.Bill Wendling2013-04-02
| | | | | | | | | | | | | | The iterator could be invalidated when it's recursively deleting a whole bunch of constant expressions in a constant initializer. Note: This was only reproducible if `opt' was run on a `.bc' file. If `opt' was run on a `.ll' file, it wouldn't crash. This is why the test first pushes the `.ll' file through `llvm-as' before feeding it to `opt'. PR15440 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178531 91177308-0d34-0410-b5e6-96231b3b80d8
* Move library call prototype attribute inference to functionattrsMeador Inge2013-03-21
| | | | | | | | | | | | The simplify-libcalls pass implemented a doInitialization hook to infer function prototype attributes for well-known functions. Given that the simplify-libcalls pass is going away *and* that the functionattrs pass is already in place to deduce function attributes, I am moving this logic to the functionattrs pass. This approach was discussed during patch review: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121126/157465.html. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177619 91177308-0d34-0410-b5e6-96231b3b80d8
* Use LLVMBool instead of 'bool' in the C API. Based on a patch by Peter Zotov!Nick Lewycky2013-03-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176793 91177308-0d34-0410-b5e6-96231b3b80d8
* Generalize my previous fix for -print-options.Andrew Trick2013-03-06
| | | | | | | Always print options that differ from their implicit default. At least for simple option types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176572 91177308-0d34-0410-b5e6-96231b3b80d8
* Give -loop-vectorize an explicit default.Andrew Trick2013-03-06
| | | | | | This way, clang -mllvm -print-options shows that the driver is overriding it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176569 91177308-0d34-0410-b5e6-96231b3b80d8
* Check isDiscardableIfUnused, rather than hasLocalLinkage, when bumpingLang Hames2013-03-04
| | | | | | | | GlobalValue linkage up to ExternalLinkage in the ExtractGV pass. This prevents linkonce and linkonce_odr symbols from being DCE'd. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176459 91177308-0d34-0410-b5e6-96231b3b80d8
* Retain the name of the new internal global that's been shrunk.Bill Wendling2013-02-13
| | | | | | | | | | It's possible (e.g. after an LTO build) that an internal global may be used for debugging purposes. If that's the case appending a '.b' to it makes it hard to find that variable. Steal the name from the old GV before deleting it so that they can find that variable again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175104 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert accidental commit (ran svn commit from wrong directory).Nick Lewycky2013-02-02
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174241 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch makes "&Cls::purevfn" not an odr use. This isn't what the standardNick Lewycky2013-02-02
| | | | | | | | | | says, but that's a defect (to be filed). "Cls::purevfn()" is still an odr use. Also fixes a bug in the previous patch that caused us to not mark the function referenced just because we didn't want to mark it odr used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174240 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove addRetAttributes and addFnAttributes, which aren't useful abstractions.Bill Wendling2013-01-30
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173992 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert typeIncompatible to return an AttributeSet.Bill Wendling2013-01-30
| | | | | | | There are still places which treat the Attribute object as a collection of attributes. I'm systematically removing them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173990 91177308-0d34-0410-b5e6-96231b3b80d8
* Unroll again after running BBVectorizeHal Finkel2013-01-29
| | | | | | | | Because BBVectorize may significantly shorten a loop body, unroll again after vectorization. This is especially important when using runtime or partial unrolling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173730 91177308-0d34-0410-b5e6-96231b3b80d8
* Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation ↵Michael Gottesman2013-01-28
| | | | | | for refactoring the ARC Optimizer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173647 91177308-0d34-0410-b5e6-96231b3b80d8
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