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* Inliner::OptimizationRemark: Fix crash in ↵NAKAMURA Takumi2014-04-17
| | | | | | | | clang/test/Frontend/optimization-remark.c on some hosts, including --vg. DebugLoc in Callsite would not live after Inliner. It should be copied before Inliner. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206459 91177308-0d34-0410-b5e6-96231b3b80d8
* LTO: Add more loop simplification passes to LTODuncan P. N. Exon Smith2014-04-15
| | | | | | | | | Similar to r202051, add missing loop simplification passes to the LTO optimization pipeline. Patch by Rafael Espindola. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206306 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for optimization reports.Diego Novillo2014-04-08
| | | | | | | | | | | | | | | | | | | | | | | | | Summary: This patch adds backend support for -Rpass=, which indicates the name of the optimization pass that should emit remarks stating when it made a transformation to the code. Pass names are taken from their DEBUG_NAME definitions. When emitting an optimization report diagnostic, the lack of debug information causes the diagnostic to use "<unknown>:0:0" as the location string. This is the back end counterpart for http://llvm-reviews.chandlerc.com/D3226 Reviewers: qcolombet CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D3227 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205774 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Reapply "LTO: add API to set strategy for -internalize""Duncan P. N. Exon Smith2014-04-02
| | | | | | | | | | | This reverts commit r199244. Conflicts: include/llvm-c/lto.h include/llvm/LTO/LTOCodeGenerator.h lib/LTO/LTOCodeGenerator.cpp git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205471 91177308-0d34-0410-b5e6-96231b3b80d8
* Move partial/runtime unrolling late in the pipelineHal Finkel2014-03-31
| | | | | | | | | | | | | | | | The generic (concatenation) loop unroller is currently placed early in the standard optimization pipeline. This is a good place to perform full unrolling, but not the right place to perform partial/runtime unrolling. However, most targets don't enable partial/runtime unrolling, so this never mattered. However, even some x86 cores benefit from partial/runtime unrolling of very small loops, and follow-up commits will enable this. First, we need to move partial/runtime unrolling late in the optimization pipeline (importantly, this is after SLP and loop vectorization, as vectorization can drastically change the size of a loop), while keeping the full unrolling where it is now. This change does just that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205264 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a missing break.Rafael Espindola2014-03-30
| | | | | | | | | | Patch by Tobias Güntner. I tried to write a test, but the only difference is the Changed value that gets returned. It can be tested with "opt -debug-pass=Executions -functionattrs, but that doesn't seem worth it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205121 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r204076 for now - it caused significant regressions in a number ofLang Hames2014-03-23
| | | | | | | | | | benchmarks. <rdar://problem/16368461> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204558 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Change DebugInfoFinder to use range-based loopsAlon Mishne2014-03-18
| | | | | | Also changes the iterators to return actual DI type over MDNode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204130 91177308-0d34-0410-b5e6-96231b3b80d8
* Use range metadata instead of introducing selects.Dan Gohman2014-03-17
| | | | | | | | | | | | | | | | | When GlobalOpt has determined that a GlobalVariable only ever has two values, it would convert the GlobalVariable to a boolean, and introduce SelectInsts at every load, to choose between the two possible values. These SelectInsts introduce overhead and other unpleasantness. This patch makes GlobalOpt just add range metadata to loads from such GlobalVariables instead. This enables the same main optimization (as seen in test/Transforms/GlobalOpt/integer-bool.ll), without introducing selects. The main downside is that it doesn't get the memory savings of shrinking such GlobalVariables, but this is expected to be negligible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204076 91177308-0d34-0410-b5e6-96231b3b80d8
* MergeFunctions, cmpType: fixed variable names from XXTy1 and XXTy2 to XXTyL ↵Stepan Dyatkovskiy2014-03-14
| | | | | | and XXTyR. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203907 91177308-0d34-0410-b5e6-96231b3b80d8
* MergeFunctions, cmpType: Fixed comments wrapping.Stepan Dyatkovskiy2014-03-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203905 91177308-0d34-0410-b5e6-96231b3b80d8
* First patch of patch series that improves MergeFunctions performance time ↵Stepan Dyatkovskiy2014-03-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | from O(N*N) to O(N*log(N)). The idea is to introduce total ordering among functions set. That allows to build binary tree and perform function look-up procedure in O(log(N)) time. This patch description: Introduced total ordering among Type instances. Actually it is improvement for existing isEquivalentType. 0. Coerce pointer of 0 address space to integer. 1. If left and right types are equal (the same Type* value), return 0 (means equal). 2. If types are of different kind (different type IDs). Return result of type IDs comparison, treating them as numbers. 3. If types are vectors or integers, return result of its pointers comparison (casted to numbers). 4. Check whether type ID belongs to the next group: * Void * Float * Double * X86_FP80 * FP128 * PPC_FP128 * Label * Metadata If so, return 0. 5. If left and right are pointers, return result of address space comparison (numbers comparison). 6. If types are complex. Then both LEFT and RIGHT will be expanded and their element types will be checked with the same way. If we get Res != 0 on some stage, return it. Otherwise return 0. 7. For all other cases put llvm_unreachable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203788 91177308-0d34-0410-b5e6-96231b3b80d8
* Revive SizeOptLevel-explaining comments that were dropped in r203669Eli Bendersky2014-03-12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203675 91177308-0d34-0410-b5e6-96231b3b80d8
* Move duplicated code into a helper function (exposed through overload).Eli Bendersky2014-03-12
| | | | | | | | | | | | | | | | | | | There's a bit of duplicated "magic" code in opt.cpp and Clang's CodeGen that computes the inliner threshold from opt level and size opt level. This patch moves the code to a function that lives alongside the inliner itself, providing a convenient overload to the inliner creation. A separate patch can be committed to Clang to use this once it's committed to LLVM. Standalone tools that use the inlining pass can also avoid duplicating this code and fearing it will go out of sync. Note: this patch also restructures the conditinal logic of the computation to be cleaner. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203669 91177308-0d34-0410-b5e6-96231b3b80d8
* IR: add a second ordering operand to cmpxhg for failureTim Northover2014-03-11
| | | | | | | | | | | | | | | The syntax for "cmpxchg" should now look something like: cmpxchg i32* %addr, i32 42, i32 3 acquire monotonic where the second ordering argument gives the required semantics in the case that no exchange takes place. It should be no stronger than the first ordering constraint and cannot be either "release" or "acq_rel" (since no store will have taken place). rdar://problem/15996804 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203559 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Add range based accessors for the Use-Def chain of a Value.Chandler Carruth2014-03-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This requires a number of steps. 1) Move value_use_iterator into the Value class as an implementation detail 2) Change it to actually be a *Use* iterator rather than a *User* iterator. 3) Add an adaptor which is a User iterator that always looks through the Use to the User. 4) Wrap these in Value::use_iterator and Value::user_iterator typedefs. 5) Add the range adaptors as Value::uses() and Value::users(). 6) Update *all* of the callers to correctly distinguish between whether they wanted a use_iterator (and to explicitly dig out the User when needed), or a user_iterator which makes the Use itself totally opaque. Because #6 requires churning essentially everything that walked the Use-Def chains, I went ahead and added all of the range adaptors and switched them to range-based loops where appropriate. Also because the renaming requires at least churning every line of code, it didn't make any sense to split these up into multiple commits -- all of which would touch all of the same lies of code. The result is still not quite optimal. The Value::use_iterator is a nice regular iterator, but Value::user_iterator is an iterator over User*s rather than over the User objects themselves. As a consequence, it fits a bit awkwardly into the range-based world and it has the weird extra-dereferencing 'operator->' that so many of our iterators have. I think this could be fixed by providing something which transforms a range of T&s into a range of T*s, but that *can* be separated into another patch, and it isn't yet 100% clear whether this is the right move. However, this change gets us most of the benefit and cleans up a substantial amount of code around Use and User. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203364 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Revert uses of lambdas with array_pod_sort.Benjamin Kramer2014-03-07
| | | | | | Looks like GCC implements the lambda->function pointer conversion differently. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203294 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Convert sort predicates into lambdas.Benjamin Kramer2014-03-07
| | | | | | No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203288 91177308-0d34-0410-b5e6-96231b3b80d8
* [Layering] Move DebugInfo.h into the IR library where its implementationChandler Carruth2014-03-06
| | | | | | already lives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203046 91177308-0d34-0410-b5e6-96231b3b80d8
* [Layering] Move DIBuilder.h into the IR library where its implementationChandler Carruth2014-03-06
| | | | | | already lives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203038 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Make this interface accept const Use pointers and use overrideChandler Carruth2014-03-05
| | | | | | | | to ensure we don't mess up any of the overrides. Necessary for cleaning up the Value use iterators and enabling range-based traversing of use lists. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202958 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Add 'override' keyword to virtual methods that override their base ↵Craig Topper2014-03-05
| | | | | | class. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202953 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Move CFG.h to the IR library as it defines graph traits overChandler Carruth2014-03-04
| | | | | | IR types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202827 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Move ValueHandle into the IR library where Value itself lives.Chandler Carruth2014-03-04
| | | | | | | | | | | Move the test for this class into the IR unittests as well. This uncovers that ValueMap too is in the IR library. Ironically, the unittest for ValueMap is useless in the Support library (honestly, so was the ValueHandle test) and so it already lives in the IR unittests. Mmmm, tasty layering. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202821 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Move CallSite into the IR library where it belogs. It isChandler Carruth2014-03-04
| | | | | | | abstracting between a CallInst and an InvokeInst, both of which are IR concepts. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202816 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Move GetElementPtrTypeIterator into the IR library. As itsChandler Carruth2014-03-04
| | | | | | | | | name might indicate, it is an iterator over the types in an instruction in the IR.... You see where this is going. Another step of modularizing the support library. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202815 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Move InstIterator out of the Support library, where it had noChandler Carruth2014-03-04
| | | | | | | | | | | | | business. This header includes Function and BasicBlock and directly uses the interfaces of both classes. It has to do with the IR, it even has that in the name. =] Put it in the library it belongs to. This is one step toward making LLVM's Support library survive a C++ modules bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202814 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Use std::tie to simplify compare operators.Benjamin Kramer2014-03-03
| | | | | | No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202751 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Replace llvm::next and llvm::prior with std::next and std::prev.Benjamin Kramer2014-03-02
| | | | | | Remove the old functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202636 91177308-0d34-0410-b5e6-96231b3b80d8
* Reflow isProfitableToMakeFastCCReid Kleckner2014-02-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202555 91177308-0d34-0410-b5e6-96231b3b80d8
* GlobalOpt: Apply fastcc to internal x86_thiscallcc functionsReid Kleckner2014-02-26
| | | | | | | | | | We should apply fastcc whenever profitable. We can expand this list, but there are lots of conventions with performance implications that we don't want to change. Differential Revision: http://llvm-reviews.chandlerc.com/D2705 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202293 91177308-0d34-0410-b5e6-96231b3b80d8
* Make DataLayout a plain object, not a pass.Rafael Espindola2014-02-25
| | | | | | | Instead, have a DataLayoutPass that holds one. This will allow parts of LLVM don't don't handle passes to also use DataLayout. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202168 91177308-0d34-0410-b5e6-96231b3b80d8
* Make a few more DataLayout variables const.Rafael Espindola2014-02-25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202155 91177308-0d34-0410-b5e6-96231b3b80d8
* Make some DataLayout pointers const.Rafael Espindola2014-02-24
| | | | | | No functionality change. Just reduces the noise of an upcoming patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202087 91177308-0d34-0410-b5e6-96231b3b80d8
* LTO: Add the loop vectorizer to the LTO pipeline.Arnold Schwaighofer2014-02-24
| | | | | | | | | | | | | During the LTO phase LICM will move loop invariant global variables out of loops (informed by GlobalModRef). This makes more loops countable presenting opportunity for the loop vectorizer. Adding the loop vectorizer improves some TSVC benchmarks and twolf/ref dataset (5%) on x86-64. radar://15970632 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202051 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename a few more DataLayout variables.Rafael Espindola2014-02-21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201833 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename many DataLayout variables from TD to DL.Rafael Espindola2014-02-21
| | | | | | | | | I am really sorry for the noise, but the current state where some parts of the code use TD (from the old name: TargetData) and other parts use DL makes it hard to write a patch that changes where those variables come from and how they are passed along. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201827 91177308-0d34-0410-b5e6-96231b3b80d8
* GlobalOpt: Aliases don't have sections, don't copy them when replacingReid Kleckner2014-02-13
| | | | | | | | | | | | | | | | | | | | | As defined in LangRef, aliases do not have sections. However, LLVM's GlobalAlias class inherits from GlobalValue, which means we can read and set its section. We should probably ban that as a separate change, since it doesn't make much sense for an alias to have a section that differs from its aliasee. Fixes PR18757, where the section was being lost on the global in code from Clang like: extern "C" { __attribute__((used, section("CUSTOM"))) static int in_custom_section; } Reviewers: rafael.espindola Differential Revision: http://llvm-reviews.chandlerc.com/D2758 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201286 91177308-0d34-0410-b5e6-96231b3b80d8
* Set default of inlinecold-threshold to 225.Manman Ren2014-02-06
| | | | | | | | | | | | | | | | | | | | | | | | | 225 is the default value of inline-threshold. This change will make sure we have the same inlining behavior as prior to r200886. As Chandler points out, even though we don't have code in our testing suite that uses cold attribute, there are larger applications that do use cold attribute. r200886 + this commit intend to keep the same behavior as prior to r200886. We can later on tune the inlinecold-threshold. The main purpose of r200886 is to help performance of instrumentation based PGO before we actually hook up inliner with analysis passes such as BPI and BFI. For instrumentation based PGO, we try to increase inlining of hot functions and reduce inlining of cold functions by setting inlinecold-threshold. Another option suggested by Chandler is to use a boolean flag that controls if we should use OptSizeThreshold for cold functions. The default value of the boolean flag should not change the current behavior. But it gives us less freedom in controlling inlining of cold functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200898 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
* Inliner uses a smaller inline threshold for callees with cold attribute.Manman Ren2014-02-05
| | | | | | | | | Added command line option inlinecold-threshold to set threshold for inlining functions with cold attribute. Listen to the cold attribute when it would decrease the inline threshold. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200886 91177308-0d34-0410-b5e6-96231b3b80d8
* cleanup: scc_iterator consumers should use isAtEndDuncan P. N. Exon Smith2014-02-04
| | | | | | | | | | | | | | No functional change. Updated loops from: for (I = scc_begin(), E = scc_end(); I != E; ++I) to: for (I = scc_begin(); !I.isAtEnd(); ++I) for teh win. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200789 91177308-0d34-0410-b5e6-96231b3b80d8
* inalloca: Don't remove dead arguments in the presence of inalloca argsReid Kleckner2014-02-03
| | | | | | | | | | | | It disturbs the layout of the parameters in memory and registers, leading to problems in the backend. The plan for optimizing internal inalloca functions going forward is to essentially SROA the argument memory and demote any captured arguments (things that aren't trivially written by a load or store) to an indirect pointer to a static alloca. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200717 91177308-0d34-0410-b5e6-96231b3b80d8
* Update optimization passes to handle inalloca argumentsReid Kleckner2014-01-28
| | | | | | | | | | | | | | | Summary: I searched Transforms/ and Analysis/ for 'ByVal' and updated those call sites to check for inalloca if appropriate. I added tests for any change that would allow an optimization to fire on inalloca. Reviewers: nlewycky Differential Revision: http://llvm-reviews.chandlerc.com/D2449 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200281 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix known typosAlp Toker2014-01-24
| | | | | | | Sweep the codebase for common typos. Includes some changes to visible function names that were misspelt. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200018 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove tail marker when changing an argument to an alloca.Rafael Espindola2014-01-23
| | | | | | | | | | Argument promotion can replace an argument of a call with an alloca. This requires clearing the tail marker as it is very likely that the callee is now using an alloca in the caller. This fixes pr14710. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199909 91177308-0d34-0410-b5e6-96231b3b80d8
* Make nocapture analysis work with addrspacecastMatt Arsenault2014-01-14
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199246 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply "LTO: add API to set strategy for -internalize"Duncan P. N. Exon Smith2014-01-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reapply r199191, reverted in r199197 because it carelessly broke Other/link-opts.ll. The problem was that calling createInternalizePass("main") would select createInternalizePass(bool("main")) instead of createInternalizePass(ArrayRef<const char *>("main")). This commit fixes the bug. The original commit message follows. Add API to LTOCodeGenerator to specify a strategy for the -internalize pass. This is a new attempt at Bill's change in r185882, which he reverted in r188029 due to problems with the gold linker. This puts the onus on the linker to decide whether (and what) to internalize. In particular, running internalize before outputting an object file may change a 'weak' symbol into an internal one, even though that symbol could be needed by an external object file --- e.g., with arclite. This patch enables three strategies: - LTO_INTERNALIZE_FULL: the default (and the old behaviour). - LTO_INTERNALIZE_NONE: skip -internalize. - LTO_INTERNALIZE_HIDDEN: only -internalize symbols with hidden visibility. LTO_INTERNALIZE_FULL should be used when linking an executable. Outputting an object file (e.g., via ld -r) is more complicated, and depends on whether hidden symbols should be internalized. E.g., for ld -r, LTO_INTERNALIZE_NONE can be used when -keep_private_externs, and LTO_INTERNALIZE_HIDDEN can be used otherwise. However, LTO_INTERNALIZE_FULL is inappropriate, since the output object file will eventually need to link with others. lto_codegen_set_internalize_strategy() sets the strategy for subsequent calls to lto_codegen_write_merged_modules() and lto_codegen_compile*(). <rdar://problem/14334895> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199244 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
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