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* MC: Support larger COFF string tablesNico Rieck2013-07-291-12/+15
| | | | | | | Single-slash encoded entries do not require a terminating null. This bumps the maximum table size from ~1MB to ~9.5MB. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187352 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Support powerpc64le as a syntax-checking target.Bill Schmidt2013-07-261-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | This patch provides basic support for powerpc64le as an LLVM target. However, use of this target will not actually generate little-endian code. Instead, use of the target will cause the correct little-endian built-in defines to be generated, so that code that tests for __LITTLE_ENDIAN__, for example, will be correctly parsed for syntax-only testing. Code generation will otherwise be the same as powerpc64 (big-endian), for now. The patch leaves open the possibility of creating a little-endian PowerPC64 back end, but there is no immediate intent to create such a thing. The LLVM portions of this patch simply add ppc64le coverage everywhere that ppc64 coverage currently exists. There is nothing of any import worth testing until such time as little-endian code generation is implemented. In the corresponding Clang patch, there is a new test case variant to ensure that correct built-in defines for little-endian code are generated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187179 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Remove use of asymmetric std::lower_bound comparator."Ahmed Bougacha2013-07-231-18/+12
| | | | | | | This reverts commit r185676. Originally done because of VS 2008. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186969 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a wrapper for open.Rafael Espindola2013-07-161-1/+1
| | | | | | | This centralizes the handling of O_BINARY and opens the way for hiding more differences (like how open behaves with directories). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186447 91177308-0d34-0410-b5e6-96231b3b80d8
* Add 'const' qualifiers to static const char* variables.Craig Topper2013-07-161-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186371 91177308-0d34-0410-b5e6-96231b3b80d8
* [mc-coff] Resolve aliases when emitting COFF relocationsReid Kleckner2013-07-151-2/+3
| | | | | | | | | | | | This is consistent with the ELF object writer. Add some COFF tests that relocate against an alias. Reviewers: espindola Differential Revision: http://llvm-reviews.chandlerc.com/D1079 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186341 91177308-0d34-0410-b5e6-96231b3b80d8
* Use llvm::array_lengthof to replace sizeof(array)/sizeof(array[0]).Craig Topper2013-07-151-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186301 91177308-0d34-0410-b5e6-96231b3b80d8
* Put ELF COMDAT relocations into the relevant COMDAT group.Tim Northover2013-07-101-2/+9
| | | | | | | | Patch from Игорь Пашев (I do hope we support utf-8 commit messages; I also hope he'll forgive me for transliterating it as Igor Pashev in case things go horribly wrong). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186034 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Revert r185476 and fix up TLS variant kindsUlrich Weigand2013-07-092-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the commit message to r185476 I wrote: >The PowerPC-specific modifiers VK_PPC_TLSGD and VK_PPC_TLSLD >correspond exactly to the generic modifiers VK_TLSGD and VK_TLSLD. >This causes some confusion with the asm parser, since VK_PPC_TLSGD >is output as @tlsgd, which is then read back in as VK_TLSGD. > >To avoid this confusion, this patch removes the PowerPC-specific >modifiers and uses the generic modifiers throughout. (The only >drawback is that the generic modifiers are printed in upper case >while the usual convention on PowerPC is to use lower-case modifiers. >But this is just a cosmetic issue.) This was unfortunately incorrect, there is is fact another, serious drawback to using the default VK_TLSLD/VK_TLSGD variant kinds: using these causes ELFObjectWriter::RelocNeedsGOT to return true, which in turn causes the ELFObjectWriter to emit an undefined reference to _GLOBAL_OFFSET_TABLE_. This is a problem on powerpc64, because it uses the TOC instead of the GOT, and the linker does not provide _GLOBAL_OFFSET_TABLE_, so the symbol remains undefined. This means shared libraries using TLS built with the integrated assembler are currently broken. While the whole RelocNeedsGOT / _GLOBAL_OFFSET_TABLE_ situation probably ought to be properly fixed at some point, for now I'm simply reverting the r185476 commit. Now this in turn exposes the breakage of handling @tlsgd/@tlsld in the asm parser that this check-in was originally intended to fix. To avoid this regression, I'm also adding a different fix for this problem: while common code now parses @tlsgd as VK_TLSGD, a special hack in the asm parser translates this code to the platform-specific VK_PPC_TLSGD that the back-end now expects. While this is not really pretty, it's self-contained and shouldn't hurt anything else for now. One the underlying problem is fixed, this hack can be reverted again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185945 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert: Fix wrong code offset for unwind code SET_FPREG.Kai Nacke2013-07-082-5/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185793 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert: Generate IMAGE_REL_AMD64_ADDR32NB relocations for SEH data structures.Kai Nacke2013-07-081-21/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185791 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert: Fix alignment of unwind data.Kai Nacke2013-07-081-12/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185790 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert: Emit personality function and Dwarf EH data for Win64 SEH.Kai Nacke2013-07-081-10/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185788 91177308-0d34-0410-b5e6-96231b3b80d8
* Emit personality function and Dwarf EH data for Win64 SEH.Kai Nacke2013-07-061-5/+10
| | | | | | | | | | | | Obviously the personality function should be emitted as language handler instead of the hard coded _GCC_specific_handler. The language specific data must be placed after the unwind information therefore it must not be emitted into a separate section. Reviewed by Charles Davis and Nico Rieck. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185761 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix alignment of unwind data.Kai Nacke2013-07-061-7/+12
| | | | | | | | | | | | For alignment purposes, the instruction array will always have an even number of entries, with the final entry potentially unused (in which case the array will be one longer than indicated by the count of unwind codes field). Reviewed by Charles Davis and Nico Rieck. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185760 91177308-0d34-0410-b5e6-96231b3b80d8
* Generate IMAGE_REL_AMD64_ADDR32NB relocations for SEHKai Nacke2013-07-061-5/+21
| | | | | | | | | | | | | | | data structures. The Win64 EH data structures must be of type IMAGE_REL_AMD64_ADDR32NB instead of IMAGE_REL_AMD64_ADDR32. This is easiely achieved by adding the VK_COFF_IMGREL32 modifier to the symbol reference. Change also references to start and end of the SEH range of a function as offsets to start of the function. Reviewed by Charles Davis and Nico Rieck. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185759 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix wrong code offset for unwind code SET_FPREG.Kai Nacke2013-07-062-4/+5
| | | | | | | | | | | | | The code offset for unwind code SET_FPREG is wrong because it is set to constant 0. The fix is to do the same as for the other unwind codes: emit a label and later the absolute difference between the label and the begin of the prologue. Also enables the failing test case MC/COFF/seh.s Reviewed by Charles Davis and Nico Rieck. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185758 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Implement COFF .linkonce directiveNico Rieck2013-07-065-12/+123
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185753 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove use of asymmetric std::lower_bound comparator.Ahmed Bougacha2013-07-041-12/+18
| | | | | | VS 2008 doesn't like it when in debug mode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185676 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Add .section directive to COFFNico Rieck2013-07-041-0/+172
| | | | | | | | Supports GAS flags "abdnrswxy". No support for alignment or subsections. Fixes PR16366. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185669 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Remove VK_PPC_TLSGD and VK_PPC_TLSLDUlrich Weigand2013-07-022-4/+0
| | | | | | | | | | | | | | | | | The PowerPC-specific modifiers VK_PPC_TLSGD and VK_PPC_TLSLD correspond exactly to the generic modifiers VK_TLSGD and VK_TLSLD. This causes some confusion with the asm parser, since VK_PPC_TLSGD is output as @tlsgd, which is then read back in as VK_TLSGD. To avoid this confusion, this patch removes the PowerPC-specific modifiers and uses the generic modifiers throughout. (The only drawback is that the generic modifiers are printed in upper case while the usual convention on PowerPC is to use lower-case modifiers. But this is just a cosmetic issue.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185476 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove address spaces from MC.Rafael Espindola2013-07-028-88/+64
| | | | | | | | This is dead code since PIC16 was removed in 2010. The result was an odd mix, where some parts would carefully pass it along and others would assert it was zero (most of the object streamer for example). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185436 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Add support for TLS data relocationsUlrich Weigand2013-07-012-0/+4
| | | | | | | | | | | | This adds support for TLS data relocations and modifiers: .quad target@dtpmod .quad target@tprel .quad target@dtprel Currently exploited by the asm parser only. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185394 91177308-0d34-0410-b5e6-96231b3b80d8
* Use MCFillFragment for zero-initialized data.Serge Pavlov2013-06-273-3/+17
| | | | | | | | | It fixes PR16338 (ICE when compiling very large two-dimensional array). Differential Revision: http://llvm-reviews.chandlerc.com/D1043 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185080 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Support @got modifierUlrich Weigand2013-06-251-0/+9
| | | | | | | | | Add VK_... values and relocation types necessary to support the @got family of modifiers. Used by the asm parser only. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184860 91177308-0d34-0410-b5e6-96231b3b80d8
* DebugInfo: PR14404: Avoid truncating 64 bit values into 32 bits for ↵David Blaikie2013-06-231-2/+2
| | | | | | ULEB128/SLEB128 generation git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184669 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve the time it takes to generating dwarf for assembly source filesKevin Enderby2013-06-211-1/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | that have been run through the 'C' pre-processor. The implementation of SrcMgr.FindLineNumber() is slow but OK if it uses its cache when called multiple times with an SMLoc that is forward of the previous call. In the case of generating dwarf for assembly source files that have been run through the 'C' pre-processor we need to calculate the logical line number based on the last parsed cpp hash file line comment. And the current code calls SrcMgr.FindLineNumber() twice to do this causing its cache not to work and results in very slow compile times: % time /Volumes/SandBox/build-llvm/Debug+Asserts/bin/llvm-mc -triple thumbv7-apple-ios -filetype=obj -o /tmp/x.o mscorlib.dll.E -g 672.542u 0.299s 11:13.15 99.9% 0+0k 0+2io 2106pf+0w So we save the info from the last parsed cpp hash file line comment to avoid making the second call to SrcMgr.FindLineNumber() most times and end up with compile times like: % time /Volumes/SandBox/build-llvm/Debug+Asserts/bin/llvm-mc -triple thumbv7-apple-ios -filetype=obj -o /tmp/x.o mscorlib.dll.E -g 3.404u 0.104s 0:03.80 92.1% 0+0k 0+3io 2105pf+0w rdar://14156934 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184592 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Support various tls-related modifiersUlrich Weigand2013-06-212-0/+88
| | | | | | | | | | | | The current code base only supports the minimum set of tls-related relocations and @modifiers that are necessary to support compiler- generated code. This patch extends this to the full set defined in the ABI (and supported by the GNU assembler) for the benefit of the assembler parser. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184551 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Support @higher et.al. modifiersUlrich Weigand2013-06-211-0/+12
| | | | | | | | | This adds support for the @higher, @highera, @highest, and @highesta modifers, including some missing relocation types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184550 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Support @toc@h modifierUlrich Weigand2013-06-211-0/+3
| | | | | | | | | This adds the relocation type and other necessary infrastructure to use the @toc@h modifier in the assembler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184549 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Support @h modifierUlrich Weigand2013-06-211-0/+3
| | | | | | | | | | | | | | This adds necessary infrastructure to support the @h modifier. Note that all required relocation types were already present (and unused). This patch provides support for using @h in the assembler; it would also be possible to now use this feature in code generated by the compiler, but this is not done yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184548 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Rename some more VK_PPC_ enumsUlrich Weigand2013-06-212-55/+55
| | | | | | | | | | | | | | | This renames more VK_PPC_ enums, to make them more closely reflect the @modifier string they represent. This also prepares for adding a bunch of new VK_PPC_ enums in upcoming patches. For consistency, some MO_ flags related to VK_PPC_ enums are likewise renamed. No change in behaviour. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184547 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Clean up VK_PPC_TOC... namesUlrich Weigand2013-06-201-8/+8
| | | | | | | | | | | | | | This is another minor cleanup; to bring enum names in line with the corresponding @modifier names, this renames: VK_PPC_TOC -> VK_PPC_TOCBASE VK_PPC_TOC_ENTRY -> VK_PPC_TOC16 No code change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184491 91177308-0d34-0410-b5e6-96231b3b80d8
* [MC] Support @ variants with directional labelsUlrich Weigand2013-06-201-2/+12
| | | | | | | | | | | | | The assembler parser common code supports recognizing symbol variants using the @ modifer. On PowerPC, it should also be possible to use (some of) those modifiers with directional labels, like "1f@l". This patch adds support for accepting symbol variants on directional labels as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184437 91177308-0d34-0410-b5e6-96231b3b80d8
* [MC/DWARF] Generate multiple .debug_line entries for adjacent .loc directivesUlrich Weigand2013-06-191-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | The compiler occasionally generates multiple .loc directives in a row (at the same instruction address). These need to be transformed into multple actual .debug_line table entries, since they are used to signal certain information to the debugger (e.g. if the opening brace of a function body is on the same line as the declaration). The MCAsmStreamer version of EmitDwarfLocDirective handles this correctly by emitting a .loc directive every time it is called. However, the MCObjectStream version simply defaults to recording the information and emitting only a single table entry later, e.g. when EmitInstruction is called. This patch introduces a MCAsmStreamer::EmitDwarfLocDirective version that emits a line table entry for a .loc directive that may already be pending before recording the new directive. (This is similar to how this is handled in GNU as.) With this patch (and the code alignment factor patch) applied, I'm now getting identical DWARF .debug sections for all test-suite object files on PowerPC for the internal and the external assembler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184357 91177308-0d34-0410-b5e6-96231b3b80d8
* Allow creation of single-byte MCAtoms.Ahmed Bougacha2013-06-192-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184344 91177308-0d34-0410-b5e6-96231b3b80d8
* Use pointers to the MCAsmInfo and MCRegInfo.Bill Wendling2013-06-187-98/+95
| | | | | | | | | | Someone may want to do something crazy, like replace these objects if they change or something. No functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184175 91177308-0d34-0410-b5e6-96231b3b80d8
* Silence warning in Release builds.Benjamin Kramer2013-06-161-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184059 91177308-0d34-0410-b5e6-96231b3b80d8
* Replace use of PathV1.h in MCContext.cpp.Rafael Espindola2013-06-141-2/+4
| | | | | | GetCurrentDirectory is now unused. Remove it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184003 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't use PathV1.h in Signals.h.Rafael Espindola2013-06-131-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183947 91177308-0d34-0410-b5e6-96231b3b80d8
* [MC/DWARF] Support .debug_frame / .debug_line code alignment factorsUlrich Weigand2013-06-123-31/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | I've been comparing the object file output of LLVM's integrated assembler against the external assembler on PowerPC, and one area where differences still remain are in DWARF sections. In particular, the GNU assembler generates .debug_frame and .debug_line sections using a code alignment factor of 4, since all PowerPC instructions have size 4 and must be aligned to a multiple of 4. However, current MC code hard-codes a code alignment factor of 1. This patch changes this by adding a "minimum instruction alignment" data element to MCAsmInfo and using this as code alignment factor. This requires passing a MCContext into MCDwarfLineAddr::Encode and MCDwarfLineAddr::EncodeAdvanceLoc. Note that one caller, MCDwarfLineAddr::Write, didn't actually have that information available. However, it turns out that this routine is in fact never used in the whole code base, so the patch simply removes it. If it turns out to be needed again at a later time, it could be re-added with an updated interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183834 91177308-0d34-0410-b5e6-96231b3b80d8
* Move PathV2.h to Path.hRafael Espindola2013-06-111-1/+1
| | | | | | | Most clients have already been moved from Path V1 to V2. The ones using V1 now include PathV1.h explicitly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183801 91177308-0d34-0410-b5e6-96231b3b80d8
* Make SubRegIndex size mandatory, following r183020.Ahmed Bougacha2013-05-311-9/+8
| | | | | | | | This also makes TableGen able to compute sizes/offsets of synthesized indices representing tuples. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183061 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a way to define the bit range covered by a SubRegIndex.Ahmed Bougacha2013-05-311-0/+13
| | | | | | | | | | | | | | | NOTE: If this broke your out-of-tree backend, in *RegisterInfo.td, change the instances of SubRegIndex that have a comps template arg to use the ComposedSubRegIndex class instead. In TableGen land, this adds Size and Offset attributes to SubRegIndex, and the ComposedSubRegIndex class, for which the Size and Offset are computed by TableGen. This also adds an accessor in MCRegisterInfo, and Size/Offsets for the X86 and ARM subreg indices. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183020 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove debug print added in r182949.Ahmed Bougacha2013-05-301-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182973 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the const_cast only where necessary.Bill Wendling2013-05-301-4/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182950 91177308-0d34-0410-b5e6-96231b3b80d8
* MCObjectSymbolizer: Switch from IntervalMap to sorted vector, following r182625.Ahmed Bougacha2013-05-301-10/+46
| | | | | | | | This removes the need for the missing SectionRef operator< workaround, and fixes an IntervalMap assert about alignment on MSVC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182949 91177308-0d34-0410-b5e6-96231b3b80d8
* Change how we iterate over relocations on ELF.Rafael Espindola2013-05-301-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | For COFF and MachO, sections semantically have relocations that apply to them. That is not the case on ELF. In relocatable objects (.o), a section with relocations in ELF has offsets to another section where the relocations should be applied. In dynamic objects and executables, relocations don't have an offset, they have a virtual address. The section sh_info may or may not point to another section, but that is not actually used for resolving the relocations. This patch exposes that in the ObjectFile API. It has the following advantages: * Most (all?) clients can handle this more efficiently. They will normally walk all relocations, so doing an effort to iterate in a particular order doesn't save time. * llvm-readobj now prints relocations in the same way the native readelf does. * probably most important, relocations that don't point to any section are now visible. This is the case of relocations in the rela.dyn section. See the updated relocation-executable.test for example. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182908 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for DWARF line number table entries for values in the instructionCameron Zwarich2013-05-251-0/+2
| | | | | | stream. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182712 91177308-0d34-0410-b5e6-96231b3b80d8
* Follow up of the introduction of MCSymbolizer.Quentin Colombet2013-05-244-4/+27
| | | | | | | | - Ressurect old MCDisassemble API to soften transition. - Extend MCTargetDesc to set target specific symbolizer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182688 91177308-0d34-0410-b5e6-96231b3b80d8
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