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* Mark the methods in the Mangler const.Rafael Espindola2014-02-10
| | | | | | | | | A const ObjectFile needs to be able to provide its name. For an IRObjectFile, that means being able to call the mangler. Since each IRObjectFile can have a different mangling, it is natural for them to contain a Mangler which is therefore also const. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201113 91177308-0d34-0410-b5e6-96231b3b80d8
* Copy the ThreadLocalMode in GlobalVariable::copyAttributesFromHans Wennborg2014-02-10
| | | | | | This fixes the oversight from r159077. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201098 91177308-0d34-0410-b5e6-96231b3b80d8
* Disable most IR-level transform passes on functions marked 'optnone'.Paul Robinson2014-02-06
| | | | | | | | | | Ideally only those transform passes that run at -O0 remain enabled, in reality we get as close as we reasonably can. Passes are responsible for disabling themselves, it's not the job of the pass manager to do it for them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200892 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Don't require analysis results to be const in the new pass manager.Chandler Carruth2014-02-05
| | | | | | | | | | I think this was just over-eagerness on my part. The analysis results need to often be non-const because they need to (in some cases at least) be updated by the transformation pass in order to remain correct. It also makes lazy analyses (a common case) needlessly annoying to write in order to make their entire state mutable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200881 91177308-0d34-0410-b5e6-96231b3b80d8
* Test commitAlon Mishne2014-02-05
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200843 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix wording of warning message about invalid debug info.Manman Ren2014-02-04
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200806 91177308-0d34-0410-b5e6-96231b3b80d8
* llvm-cov: Fix include order in GCOV.cppJustin Bogner2014-02-04
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200796 91177308-0d34-0410-b5e6-96231b3b80d8
* llvm-cov: Implement the preserve-paths flagJustin Bogner2014-02-04
| | | | | | | | | | | | | | | | Until now, when a path in a gcno file included a directory, we would emit our .gcov file in that directory, whereas gcov always emits the file in the current directory. In doing so, this implements gcov's strange name-mangling -p flag, which is needed to avoid clobbering files when two with the same name exist in different directories. The path mangling is a bit ugly and only handles unix-like paths, but it's simple, and it doesn't make any guesses as to how it should behave outside of what gcov documents. If we decide this should be cross platform later, we can consider the compatibility implications then. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200754 91177308-0d34-0410-b5e6-96231b3b80d8
* DIBuilder: simplify array generation to produce true zero-length arraysDavid Blaikie2014-02-03
| | | | | | | | | | | | For some anachronistic reason we were producing {i32 0} for zero-length debug info arrays. (this change is paired with a Clang change and may cause temporary buildbot noise) Let's not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200721 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement inalloca codegen for x86 with the new inalloca designReid Kleckner2014-01-31
| | | | | | | | | | | | | | | | Calls with inalloca are lowered by skipping all stores for arguments passed in memory and the initial stack adjustment to allocate argument memory. Now the frontend is responsible for the memory layout, and the backend doesn't have to do any work. As a result these changes are pretty minimal. Reviewers: echristo Differential Revision: http://llvm-reviews.chandlerc.com/D2637 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200596 91177308-0d34-0410-b5e6-96231b3b80d8
* [ms-cxxabi] Add a new calling convention that swaps 'this' and 'sret'Reid Kleckner2014-01-31
| | | | | | | | | | | | | | | | | | | | MSVC always places the 'this' parameter for a method first. The implicit 'sret' pointer for methods always comes second. We already implement this for __thiscall by putting sret parameters on the stack, but __cdecl methods require putting both parameters on the stack in opposite order. Using a special calling convention allows frontends to keep the sret parameter first, which avoids breaking lots of assumptions in LLVM and Clang. Fixes PR15768 with the corresponding change in Clang. Reviewers: ributzka, majnemer Differential Revision: http://llvm-reviews.chandlerc.com/D2663 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200561 91177308-0d34-0410-b5e6-96231b3b80d8
* Reland r200340 - 'Add line table debug info to COFF files when using a win32 ↵Timur Iskhodzhanov2014-01-30
| | | | | | | | triple' This incorporates a couple of fixes reviewed at http://llvm-reviews.chandlerc.com/D2651 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200440 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r200340, "Add line table debug info to COFF files when using a win32 ↵NAKAMURA Takumi2014-01-29
| | | | | | | | triple." It was incompatible with --target=i686-win32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200375 91177308-0d34-0410-b5e6-96231b3b80d8
* Use a raw_stream to implement the mangler.Rafael Espindola2014-01-29
| | | | | | | | | This is a bit more convenient for some callers, but more importantly, it is easier to implement correctly. Doing this removes the patching of already printed data that was used for fastcall, fixing a crash with private fastcall symbols. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200367 91177308-0d34-0410-b5e6-96231b3b80d8
* Add line table debug info to COFF files when using a win32 triple.Timur Iskhodzhanov2014-01-28
| | | | | | Reviewed at http://llvm-reviews.chandlerc.com/D2232 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200340 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix pr14893.Rafael Espindola2014-01-28
| | | | | | | | | | | When simplifycfg moves an instruction, it must drop metadata it doesn't know is still valid with the preconditions changes. In particular, it must drop the range and tbaa metadata. The patch implements this with an utility function to drop all metadata not in a white list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200322 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix llvm-dis to print the inalloca bit on allocas.Reid Kleckner2014-01-25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200059 91177308-0d34-0410-b5e6-96231b3b80d8
* Bug 18228 - Fix accepting bitcasts between vectors of pointers with aMatt Arsenault2014-01-22
| | | | | | | | | | | | | different number of elements. Bitcasts were passing with vectors of pointers with different number of elements since the number of elements was checking SrcTy->getVectorNumElements() == SrcTy->getVectorNumElements() which isn't helpful. The addrspacecast was also wrong, but that case at least is caught by the verifier. Refactor bitcast and addrspacecast handling in castIsValid to be more readable and fix this problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199821 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Wire up the Verifier for the new pass manager and connect it to theChandler Carruth2014-01-20
| | | | | | | | | | | | | | | | | | | | | | various opt verifier commandline options. Mostly mechanical wiring of the verifier to the new pass manager. Exercises one of the more unusual aspects of it -- a pass can be either a module or function pass interchangably. If this is ever problematic, we can make things more constrained, but for things like the verifier where there is an "obvious" applicability at both levels, it seems convenient. This is the next-to-last piece of basic functionality left to make the opt commandline driving of the new pass manager minimally functional for testing and further development. There is still a lot to be done there (notably the factoring into .def files to kill the current boilerplate code) but it is relatively uninteresting. The only interesting bit left for minimal functionality is supporting the registration of analyses. I'm planning on doing that on top of the .def file switch mostly because the boilerplate for the analyses would be significantly worse. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199646 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Make the verifier work independently of any pass manager.Chandler Carruth2014-01-19
| | | | | | | | | | | | | | | | | | | | | | | This makes the 'verifyFunction' and 'verifyModule' functions totally independent operations on the LLVM IR. It also cleans up their API a bit by lifting the abort behavior into their clients and just using an optional raw_ostream parameter to control printing. The implementation of the verifier is now just an InstVisitor with no multiple inheritance. It also is significantly more const-correct, and hides the const violations internally. The two layers that force us to break const correctness are building a DomTree and dispatching through the InstVisitor. A new VerifierPass is used to implement the legacy pass manager interface in terms of the other pieces. The error messages produced may be slightly different now, and we may have slightly different short circuiting behavior with different usage models of the verifier, but generally everything works equivalently and this unblocks wiring the verifier up to the new pass manager. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199569 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a const lookup routine to get a BlockAddress constant if there isChandler Carruth2014-01-19
| | | | | | | | one, but not create one. This is useful in the verifier when we want to query the constant if it exists but not create one. To be used in an upcoming commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199568 91177308-0d34-0410-b5e6-96231b3b80d8
* Support AddrSpaceCast in ConstantExpr::getAsInstruction.Eli Bendersky2014-01-18
| | | | | | | | | It's handled similarly to the other casts. CastInst::Create already knows how to handle it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199565 91177308-0d34-0410-b5e6-96231b3b80d8
* Upgrade ConstantFP's negative zero and infinity getters to handle vector types.Benjamin Kramer2014-01-18
| | | | | | Will be used soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199552 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an inalloca flag to allocasReid Kleckner2014-01-17
| | | | | | | | | | | | | | | | Summary: The only current use of this flag is to mark the alloca as dynamic, even if its in the entry block. The stack adjustment for the alloca can never be folded into the prologue because the call may clear it and it has to be allocated at the top of the stack. Reviewers: majnemer CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D2571 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199525 91177308-0d34-0410-b5e6-96231b3b80d8
* Add two new calling conventions for runtime callsJuergen Ributzka2014-01-17
| | | | | | | | | | | | | | This patch adds two new target-independent calling conventions for runtime calls - PreserveMost and PreserveAll. The target-specific implementation for X86-64 is defined as following: - Arguments are passed as for the default C calling convention - The same applies for the return value(s) - PreserveMost preserves all GPRs - except R11 - PreserveAll preserves all GPRs and all XMMs/YMMs - except R11 Reviewed by Lang and Philip git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199508 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] [cleanup] Rename some of the Verifier's members, re-arrange them,Chandler Carruth2014-01-17
| | | | | | | | | | | and tweak comments prior to more invasive surgery. Also clean up some other non-doxygen comments, and run clang-format over the parts that are going to change dramatically in subsequent commits so that those don't get cluttered with formatting changes. No functionality changed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199489 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Remove the preverifier and directly compute the DominatorTree forChandler Carruth2014-01-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the verifier after ensuring the CFG is at least usefully formed. This fixes a number of problems: 1) The PreVerifier was missing the controls the Verifier provides over *how* an invalid module is handled -- it just aborted the program! Now it uses the same logic as the Verifier which is significantly more library-friendly. 2) The DominatorTree used previously could have been cached and not updated due to bugs in prior passes and we would silently use the stale tree. This could cause dominance errors to not be as quickly diagnosed. 3) We can now (in the next patch) pull the functionality of the verifier apart from the pass infrastructure so that you can verify IR without having any form of pass manager. This in turn frees the code to share logic between old and new pass manager variants. Along the way I fixed at least one annoying bug -- the state for 'Broken' wasn't being cleared from run to run causing all functions visited after the first broken function to be marked as broken regardless of whether *they* were a problem. Fortunately, I don't really know much of a way to observe this peculiarity. In case folks are worried about the runtime cost, its negligible. I looked at running the entire regression test suite (which should be a relatively good use of the verifier) before and after but was unable to even measure the time spent on the verifier and there was no regresion from before to after. I checked both with debug builds and optimized builds. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199487 91177308-0d34-0410-b5e6-96231b3b80d8
* Change inalloca rules to make it only apply to the last parameterReid Kleckner2014-01-16
| | | | | | | | | | | This makes things a lot easier, because we can now talk about the "argument allocation", which allocates all the memory for the call in one shot. The only functional change is to the verifier for a feature that hasn't shipped yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199434 91177308-0d34-0410-b5e6-96231b3b80d8
* [opt][PassInfo] Allow opt to run passes that need target machine.Quentin Colombet2014-01-16
| | | | | | | | | | | | | | | | | | | When registering a pass, a pass can now specify a second construct that takes as argument a pointer to TargetMachine. The PassInfo class has been updated to reflect that possibility. If such a constructor exists opt will use it instead of the default constructor when instantiating the pass. Since such IR passes are supposed to be rare, no specific support has been added to this commit to allow an easy registration of such a pass. In other words, for such pass, the initialization function has to be hand-written (see CodeGenPrepare for instance). Now, codegenprepare can be tested using opt: opt -codegenprepare -mtriple=mytriple input.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199430 91177308-0d34-0410-b5e6-96231b3b80d8
* Report a warning when dropping outdated debug info metadata.Manman Ren2014-01-16
| | | | | | | Use DiagnosticInfo to emit the warning. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199346 91177308-0d34-0410-b5e6-96231b3b80d8
* Return an error_code from materializeAllPermanently.Rafael Espindola2014-01-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199275 91177308-0d34-0410-b5e6-96231b3b80d8
* Use error_code in Module::materializeAll.Rafael Espindola2014-01-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199269 91177308-0d34-0410-b5e6-96231b3b80d8
* Decouple dllexport/dllimport from linkageNico Rieck2014-01-14
| | | | | | | | | | | | | | | | | | | Representing dllexport/dllimport as distinct linkage types prevents using these attributes on templates and inline functions. Instead of introducing further mixed linkage types to include linkonce and weak ODR, the old import/export linkage types are replaced with a new separate visibility-like specifier: define available_externally dllimport void @f() {} @Var = dllexport global i32 1, align 4 Linkage for dllexported globals and functions is now equal to their linkage without dllexport. Imported globals and functions must be either declarations with external linkage, or definitions with AvailableExternallyLinkage. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199218 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Decouple dllexport/dllimport from linkage"Nico Rieck2014-01-14
| | | | | | | | Revert this for now until I fix an issue in Clang with it. This reverts commit r199204. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199207 91177308-0d34-0410-b5e6-96231b3b80d8
* Decouple dllexport/dllimport from linkageNico Rieck2014-01-14
| | | | | | | | | | | | | | | | | | | Representing dllexport/dllimport as distinct linkage types prevents using these attributes on templates and inline functions. Instead of introducing further mixed linkage types to include linkonce and weak ODR, the old import/export linkage types are replaced with a new separate visibility-like specifier: define available_externally dllimport void @f() {} @Var = dllexport global i32 1, align 4 Linkage for dllexported globals and functions is now equal to their linkage without dllexport. Imported globals and functions must be either declarations with external linkage, or definitions with AvailableExternallyLinkage. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199204 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix fastcall mangling of dllimported symbolsNico Rieck2014-01-14
| | | | | | | | | | | | | fastcall requires @ as global prefix instead of _ but getNameWithPrefix wrongly assumes the OutName buffer is empty and replaces at index 0. For imported functions this buffer is pre-filled with "__imp_" resulting in broken "@_imp_foo@0" mangling. Instead replace at the proper index. We also never have to prepend the @-prefix because this fastcall mangling is only used on 32-bit Windows targets which have _ has global prefix. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199203 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix llc to not reuse spill slots in functions that invoke setjmp()Mark Seaborn2014-01-14
| | | | | | | | | | | | | | | | | | We need to ensure that StackSlotColoring.cpp does not reuse stack spill slots in functions that call "returns_twice" functions such as setjmp(), otherwise this can lead to miscompiled code, because a stack slot would be clobbered when it's still live. This was already handled correctly for functions that call setjmp() (though this wasn't covered by a test), but not for functions that invoke setjmp(). We fix this by changing callsFunctionThatReturnsTwice() to check for invoke instructions. This fixes PR18244. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199180 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix uninitialized warning in llvm/lib/IR/DataLayout.cpp.Cameron McInally2014-01-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199147 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Split DominatorTree into a concrete analysis result object whichChandler Carruth2014-01-13
| | | | | | | | | | | | | | | | | | | | | | | can be used by both the new pass manager and the old. This removes it from any of the virtual mess of the pass interfaces and lets it derive cleanly from the DominatorTreeBase<> template. In turn, tons of boilerplate interface can be nuked and it turns into a very straightforward extension of the base DominatorTree interface. The old analysis pass is now a simple wrapper. The names and style of this split should match the split between CallGraph and CallGraphWrapperPass. All of the users of DominatorTree have been updated to match using many of the same tricks as with CallGraph. The goal is that the common type remains the resulting DominatorTree rather than the pass. This will make subsequent work toward the new pass manager significantly easier. Also in numerous places things became cleaner because I switched from re-running the pass (!!! mid way through some other passes run!!!) to directly recomputing the domtree. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199104 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Pull the generic graph algorithms and data structures for dominatorChandler Carruth2014-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | trees into the Support library. These are all expressed in terms of the generic GraphTraits and CFG, with no reliance on any concrete IR types. Putting them in support clarifies that and makes the fact that the static analyzer in Clang uses them much more sane. When moving the Dominators.h file into the IR library I claimed that this was the right home for it but not something I planned to work on. Oops. So why am I doing this? It happens to be one step toward breaking the requirement that IR verification can only be performed from inside of a pass context, which completely blocks the implementation of verification for the new pass manager infrastructure. Fixing it will also allow removing the concept of the "preverify" step (WTF???) and allow the verifier to cleanly flag functions which fail verification in a way that precludes even computing dominance information. Currently, that results in a fatal error even when you ask the verifier to not fatally error. It's awesome like that. The yak shaving will continue... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199095 91177308-0d34-0410-b5e6-96231b3b80d8
* [cleanup] Move the Dominators.h and Verifier.h headers into the IRChandler Carruth2014-01-13
| | | | | | | | | | | | | | | | | | directory. These passes are already defined in the IR library, and it doesn't make any sense to have the headers in Analysis. Long term, I think there is going to be a much better way to divide these matters. The dominators code should be fully separated into the abstract graph algorithm and have that put in Support where it becomes obvious that evn Clang's CFGBlock's can use it. Then the verifier can manually construct dominance information from the Support-driven interface while the Analysis library can provide a pass which both caches, reconstructs, and supports a nice update API. But those are very long term, and so I don't want to leave the really confusing structure until that day arrives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199082 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Add module and function printing passes for the new pass manager.Chandler Carruth2014-01-12
| | | | | | | | | This implements the legacy passes in terms of the new ones. It adds basic testing using explicit runs of the passes. Next up will be wiring the basic output mechanism of opt up when the new pass manager is engaged unless bitcode writing is requested. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199049 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Simplify the IR printing passes significantly now that a narrowerChandler Carruth2014-01-12
| | | | | | | | | | API is exposed. This removes the support for deleting the ostream, switches the member and constructor order arround to be consistent with the creation routines, and switches to using references. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199047 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Simplify the interface exposed for IR printing passes.Chandler Carruth2014-01-12
| | | | | | | | | | | | Nothing was using the ability of the pass to delete the raw_ostream it printed to, and nothing was trying to pass it a pointer to the raw_ostream. Also, the function variant had a different order of arguments from all of the others which was just really confusing. Now the interface accepts a reference, doesn't offer to delete it, and uses a consistent order. The implementation of the printing passes haven't been updated with this simplification, this is just the API switch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199044 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Run clang-format and remove redundant or obvious comments beforeChandler Carruth2014-01-12
| | | | | | | the heavy factoring needed to share logic between the new pass manager and the old. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199043 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Rename the IR printing pass header to a more generic and correctChandler Carruth2014-01-12
| | | | | | | | name to match the source file which I got earlier. Update the include sites. Also modernize the comments in the header to use the more recommended doxygen style. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199041 91177308-0d34-0410-b5e6-96231b3b80d8
* [PM] Add names to passes under the new pass manager, and a debug outputChandler Carruth2014-01-11
| | | | | | | | | | mode that can be used to debug the execution of everything. No support for analyses here, that will come later. This already helps show parts of the opt commandline integration that isn't working. Tests of that will start using it as the bugs are fixed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199004 91177308-0d34-0410-b5e6-96231b3b80d8
* Use 'w' instead of 'c' to represent the win32 mangling.Rafael Espindola2014-01-10
| | | | | | | This change was requested to avoid confusion if we ever support non windows coff systems. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198938 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-remove dead code.Nadav Rotem2014-01-09
| | | | | | | | This reverts r198854. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198879 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r198819 - "Remove dead code."Nadav Rotem2014-01-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198854 91177308-0d34-0410-b5e6-96231b3b80d8
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