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* Merging r338968:Hans Wennborg2018-08-071-12/+0
| | | | | | | | | | | | | | | ------------------------------------------------------------------------ r338968 | echristo | 2018-08-05 16:23:37 +0200 (Sun, 05 Aug 2018) | 6 lines Revert "Add a warning if someone attempts to add extra section flags to sections" There are a bunch of edge cases and inconsistencies in how we're emitting sections cause this warning to fire and it needs more work. This reverts commit r335558. ------------------------------------------------------------------------ llvm-svn: 339099
* MC: Implement support for new .addrsig and .addrsig_sym directives.Peter Collingbourne2018-07-172-0/+91
| | | | | | | | | Part of the address-significance tables proposal: http://lists.llvm.org/pipermail/llvm-dev/2018-May/123514.html Differential Revision: https://reviews.llvm.org/D47744 llvm-svn: 337328
* Recommit r335794 "Add support for generating a call graph profile from ↵Michael J. Spencer2018-07-161-0/+51
| | | | | | Branch Frequency Info." with fix for removed functions. llvm-svn: 337140
* Quick fix for some Windows botsPaul Robinson2018-07-111-4/+4
| | | | llvm-svn: 336832
* Use debug-prefix-map for AT_NAMEJonas Devlieghere2018-07-111-0/+8
| | | | | | | | | | | | | | | | | | AT_NAME was being emitted before the directory paths were remapped. This ensures that all paths are remapped before anything is emitted. An additional test case has been added. Note that this only works if the replacement string is an absolute path. If not, then AT_decl_file believes the new path is a relative path, and joins that path with the compilation directory. I do not know of a good way to resolve this. Patch by: Siddhartha Bagaria (starsid) Differential revision: https://reviews.llvm.org/D49169 llvm-svn: 336793
* Update test to work on WindowsPaul Robinson2018-07-101-1/+1
| | | | llvm-svn: 336687
* Support -fdebug-prefix-map in llvm-mc. This is useful to omit thePaul Robinson2018-07-101-0/+17
| | | | | | | | | | | debug compilation dir when compiling assembly files with -g. Part of PR38050. Patch by Siddhartha Bagaria! Differential Revision: https://reviews.llvm.org/D48988 llvm-svn: 336680
* Replace unused output filenames with /dev/null in testsFangrui Song2018-07-021-1/+1
| | | | | | Similar to rLLD336129 llvm-svn: 336131
* Add an entry for rodata constant merge sections to the defaultEric Christopher2018-07-021-2/+4
| | | | | | | | | | section flags in the ELF assembler. This matches the defaults given in the rest of MC. Fixes PR37997 where we couldn't assemble our own assembly output without warnings. llvm-svn: 336072
* Revert "Add support for generating a call graph profile from Branch ↵Benjamin Kramer2018-06-281-50/+0
| | | | | | | | Frequency Info." This reverts commits r335794 and r335797. Breaks ThinLTO+FDO selfhost. llvm-svn: 335851
* Add support for generating a call graph profile from Branch Frequency Info.Michael J. Spencer2018-06-271-0/+50
| | | | | | | | | | | | | | | | | | | | | === Generating the CG Profile === The CGProfile module pass simply gets the block profile count for each BB and scans for call instructions. For each call instruction it adds an edge from the current function to the called function with the current BB block profile count as the weight. After scanning all the functions, it generates an appending module flag containing the data. The format looks like: ``` !llvm.module.flags = !{!0} !0 = !{i32 5, !"CG Profile", !1} !1 = !{!2, !3, !4} ; List of edges !2 = !{void ()* @a, void ()* @b, i64 32} ; Edge from a to b with a weight of 32 !3 = !{void (i1)* @freq, void ()* @a, i64 11} !4 = !{void (i1)* @freq, void ()* @b, i64 20} ``` Differential Revision: https://reviews.llvm.org/D48105 llvm-svn: 335794
* Move `REQUIRES:` line to the topFangrui Song2018-06-265-8/+6
| | | | llvm-svn: 335635
* Add a warning if someone attempts to add extra section flags to sectionsEric Christopher2018-06-251-0/+10
| | | | | | with well defined semantics like .rodata. llvm-svn: 335558
* Fix test again, try to keep all targets happyPaul Robinson2018-06-221-2/+2
| | | | llvm-svn: 335356
* Fix test, nop is not always 1 bytePaul Robinson2018-06-221-3/+3
| | | | llvm-svn: 335353
* [DWARFv5] Allow ".loc 0" to refer to the root file.Paul Robinson2018-06-221-0/+26
| | | | | | | | | DWARF v5 explicitly represents file #0 in the line table. Prior versions did not, so ".loc 0" is still an error in those cases. Differential Revision: https://reviews.llvm.org/D48452 llvm-svn: 335350
* Revert r335306 (and r335314) - the Call Graph Profile pass.Chandler Carruth2018-06-221-50/+0
| | | | | | | | | | | This is the first pass in the main pipeline to use the legacy PM's ability to run function analyses "on demand". Unfortunately, it turns out there are bugs in that somewhat-hacky approach. At the very least, it leaks memory and doesn't support -debug-pass=Structure. Unclear if there are larger issues or not, but this should get the sanitizer bots back to green by fixing the memory leaks. llvm-svn: 335320
* [Instrumentation] Add Call Graph Profile passMichael J. Spencer2018-06-211-0/+50
| | | | | | | | | | | | | | | | | | | | This patch adds support for generating a call graph profile from Branch Frequency Info. The CGProfile module pass simply gets the block profile count for each BB and scans for call instructions. For each call instruction it adds an edge from the current function to the called function with the current BB block profile count as the weight. After scanning all the functions, it generates an appending module flag containing the data. The format looks like: !llvm.module.flags = !{!0} !0 = !{i32 5, !"CG Profile", !1} !1 = !{!2, !3, !4} ; List of edges !2 = !{void ()* @a, void ()* @b, i64 32} ; Edge from a to b with a weight of 32 !3 = !{void (i1)* @freq, void ()* @a, i64 11} !4 = !{void (i1)* @freq, void ()* @b, i64 20} Differential Revision: https://reviews.llvm.org/D48105 llvm-svn: 335306
* [DWARF] Warn on and ignore ".file 0" for DWARF v4 and earlier.Paul Robinson2018-06-211-1/+17
| | | | | | | This had been messing with the directory table for prior versions, and also could induce a crash when generating asm output. llvm-svn: 335254
* [DWARF] Don't keep a ref to possibly stack allocated data.Paul Robinson2018-06-201-6/+8
| | | | llvm-svn: 335146
* [DWARFv5] Tolerate files not all having an MD5 checksum.Paul Robinson2018-06-142-1/+45
| | | | | | | | | | | | | | | | | | In some cases, for example when compiling a preprocessed file, the front-end is not able to provide an MD5 checksum for all files. When that happens, omit the MD5 checksums from the final DWARF, because DWARF doesn't have a way to indicate that some but not all files have a checksum. When assembling a .s file, and some but not all .file directives provide an MD5 checksum, issue a warning and don't emit MD5 into the DWARF. Fixes PR37623. Differential Revision: https://reviews.llvm.org/D48135 llvm-svn: 334710
* [MC] [X86] Teach leaq _GLOBAL_OFFSET_TABLE(%rip), %r15 to use ↵Fangrui Song2018-06-121-13/+17
| | | | | | | | | | | | | | | | | | | R_X86_64_GOTPC32 instead of R_X86_64_PC32 Summary: This is similar to D46319 (ARM). x86-64 psABI p40 gives an example: leaq _GLOBAL_OFFSET_TABLE(%rip), %r15 # GOTPC32 reloc GNU as creates R_X86_64_GOTPC32. However, MC currently emits R_X86_64_PC32. Reviewers: javed.absar, echristo Subscribers: kristof.beyls, llvm-commits, peter.smith, grimar Differential Revision: https://reviews.llvm.org/D47507 llvm-svn: 334515
* [DWARFv5] llvm-mc -dwarf-version does not imply -g.Paul Robinson2018-06-124-24/+19
| | | | | | | | | | | | | Don't provide the assembler source as the "root file" unless the user asked to have debug info for the assembler source (with -g). If the source doesn't provide an explicit ".file 0" then (a) use the compilation directory as directory #0, and (b) use the file #1 info for file #0 also. Differential Revision: https://reviews.llvm.org/D48055 llvm-svn: 334512
* [MC] Add assembler support for .cg_profile.Michael J. Spencer2018-06-022-0/+107
| | | | | | | | | | | | | | | Object FIle Representation At codegen time this is emitted into the ELF file a pair of symbol indices and a weight. In assembly it looks like: .cg_profile a, b, 32 .cg_profile freq, a, 11 .cg_profile freq, b, 20 When writing an ELF file these are put into a SHT_LLVM_CALL_GRAPH_PROFILE (0x6fff4c02) section as (uint32_t, uint32_t, uint64_t) tuples as (from symbol index, to symbol index, weight). Differential Revision: https://reviews.llvm.org/D44965 llvm-svn: 333823
* MC: Introduce an ELF dwo object writer and teach llvm-mc about it.Peter Collingbourne2018-05-212-0/+35
| | | | | | | | Part of PR37466. Differential Revision: https://reviews.llvm.org/D47051 llvm-svn: 332875
* [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label.Shiva Chen2018-05-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
* ELFObjectWriter: Allow one unique symver per symbolVlad Tsyrklevich2018-04-272-0/+12
| | | | | | | | | | | | | | | | | Summary: Only allow a single unique .symver alias per symbol. This matches the behavior of gas. I noticed that we ignored multiple mismatched symver directives looking at https://reviews.llvm.org/D45798 Reviewers: pcc, tejohnson, espindola Reviewed By: pcc Subscribers: emaste, arichardson, llvm-commits, kcc Differential Revision: https://reviews.llvm.org/D45845 llvm-svn: 331078
* Specify REQUIRES: default_triple in a few testsJustin Bogner2018-04-261-0/+1
| | | | | | These were all failing when specifying LLVM_DEFAULT_TARGET_TRIPLE=''. llvm-svn: 330977
* [test] Fix MC/ELF/nocompression.sJonas Devlieghere2018-04-221-1/+1
| | | | | | | | | Unbreak the linux build bots: http://lab.llvm.org:8011/builders/clang-lld-x86_64-2stage/builds/5165/ http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/28775 http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/8227 llvm-svn: 330539
* [DWARFv5] Fuss with asm syntax for conveying MD5 checksum.Paul Robinson2018-04-113-11/+11
| | | | | | | | | | Previously the MD5 option of the .file directive provided the checksum as a quoted hex string; now it's a normal hex number with 0x prefix, same as the .octa directive accepts. Differential Revision: https://reviews.llvm.org/D45459 llvm-svn: 329820
* Reapply "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-294-10/+46
| | | | | | | | | | | | | | | | | DWARF v5 specifies that the root file (also given in the DW_AT_name attribute of the compilation unit DIE) should be emitted explicitly to the line table's list of files. This makes the line table more independent of the .debug_info section. We emit the new syntax only for DWARF v5 and later. Fixes the bug found by asan. Also XFAIL the new test for Darwin, which is stuck on DWARF v2, and fix up other tests so they stop failing on Windows. Last but not least, don't break "clang -g" of an assembler file that has .file directives in it. Differential Revision: https://reviews.llvm.org/D44054 llvm-svn: 328805
* Revert "Reapply "[DWARFv5] Emit file 0 to the line table.""Alexander Potapenko2018-03-284-46/+10
| | | | | | | | | | | | | | | This reverts commit r328676. Commit r328676 broke the -no-integrated-as flag necessary to build Linux kernel with Clang: $ cat t.c void foo() {} $ clang -no-integrated-as -c t.c -g /tmp/t-dcdec5.s: Assembler messages: /tmp/t-dcdec5.s:8: Error: file number less than one clang-7.0: error: assembler command failed with exit code 1 (use -v to see invocation) llvm-svn: 328699
* Reapply "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-274-10/+46
| | | | | | | | | | | | | | | | DWARF v5 specifies that the root file (also given in the DW_AT_name attribute of the compilation unit DIE) should be emitted explicitly to the line table's list of files. This makes the line table more independent of the .debug_info section. Fixes the bug found by asan. Also XFAIL the new test for Darwin, which is stuck on DWARF v2, and fix up other tests so they stop failing on Windows. Last but not least, don't break "clang -g" of an assembler file that has .file directives in it. Differential Revision: https://reviews.llvm.org/D44054 llvm-svn: 328676
* Add REQUIRES lines for the targets being checked in this test.Eric Christopher2018-03-241-0/+3
| | | | llvm-svn: 328408
* Allow FDE references outside the +/-2GB range supported by PC relativeEric Christopher2018-03-241-21/+44
| | | | | | | | | | offsets for code models other than small/medium. For JIT application, memory layout is less controlled and can result in truncations otherwise. Patch based on one by Olexa Bilaniuk! llvm-svn: 328400
* [llvm] Fix mc testsAlexander Shaposhnikov2018-03-121-0/+4
| | | | | | | This diff adjusts the mc tests after changing the format of llvm-readobj output for .group sections. llvm-svn: 327349
* Revert "Reapply "[DWARFv5] Emit file 0 to the line table.""Alexander Kornienko2018-03-074-46/+10
| | | | | | | | | | | | | | | | This reverts commit r326839. r326839 breaks assembly file parsing: $ cat q.c void g() {} $ clang -S q.c -g $ clang -g -c q.s q.s:9:2: error: file number already allocated .file 1 "/tmp/test" "q.c" ^ llvm-svn: 326902
* Reapply "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-064-10/+46
| | | | | | | | Fixes the bug found by asan. Also XFAIL the new test for Darwin, which is stuck on DWARF v2, and fix up other tests so they stop failing on Windows. llvm-svn: 326839
* Revert "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-064-46/+12
| | | | | | | | | Caused an asan failure. This reverts commit d54883f081186cdcce74e6f98cfc0438579ec019. aka r326758 llvm-svn: 326762
* [DWARFv5] Emit file 0 to the line table.Paul Robinson2018-03-064-12/+46
| | | | | | | | | | | DWARF v5 specifies that the root file (also given in the DW_AT_name attribute of the compilation unit DIE) should be emitted explicitly to the line table's list of files. This makes the line table more independent of the .debug_info section. Differential Revision: https://reviews.llvm.org/D44054 llvm-svn: 326758
* [DebugInfo] Add remaining files to r325970Scott Linder2018-02-232-0/+68
| | | | | | Add files which I missed in the original check-in llvm-svn: 325973
* [DebugInfo] Support DWARF v5 source code embedding extensionScott Linder2018-02-231-3/+8
| | | | | | | | | | | | | | | | | | | In DWARF v5 the Line Number Program Header is extensible, allowing values with new content types. In this extension a content type is added, DW_LNCT_LLVM_source, which contains the embedded source code of the file. Add new optional attribute for !DIFile IR metadata called source which contains source text. Use this to output the source to the DWARF line table of code objects. Analogously extend METADATA_FILE in Bitcode and .file directive in ASM to support optional source. Teach llvm-dwarfdump and llvm-objdump about the new values. Update the output format of llvm-dwarfdump to make room for the new attribute on file_names entries, and support embedded sources for the -source option in llvm-objdump. Differential Revision: https://reviews.llvm.org/D42765 llvm-svn: 325970
* [DWARFv5] Turn an assert into a diagnostic. Hand-coded assembler filesPaul Robinson2018-02-221-0/+5
| | | | | | | | should not trigger assertions. Differential Revision: https://reviews.llvm.org/D43152 llvm-svn: 325831
* [MC] Don't crash on modulo by zero (PR35650)Simon Pilgrim2018-02-221-0/+3
| | | | | | | | Extension to D12776, handle modulo by zero in the same way we handle divide by zero. Differential Revision: https://reviews.llvm.org/D43631 llvm-svn: 325810
* [llvm-mc] - Produce R_X86_64_PLT32 for "call/jmp foo".George Rimar2018-02-205-12/+14
| | | | | | | | | | | For instructions like call foo and jmp foo patch changes relocation produced from R_X86_64_PC32 to R_X86_64_PLT32. Relocation can be used as a marker for 32-bit PC-relative branches. Linker will reduce PLT32 relocation to PC32 if function is defined locally. Differential revision: https://reviews.llvm.org/D43383 llvm-svn: 325569
* [DWARFv5] Fix dumper to show the file table starts at index 0.Paul Robinson2018-02-081-2/+2
| | | | | | | | Emitting the correct (root of compilation) file at index 0 will be posted for review later; I wanted to get this minor change out of the way first. llvm-svn: 324669
* Parameterize a test.Paul Robinson2018-02-081-10/+10
| | | | llvm-svn: 324657
* [DWARFv5] Emit .debug_line_str (in a non-DWO file).Paul Robinson2018-02-061-6/+13
| | | | | | | | This should enable the linker to do string-pooling of path names. Differential Revision: https://reviews.llvm.org/D42707 llvm-svn: 324393
* [DWARF] Regularize dumping strings from line tables.Paul Robinson2018-02-051-5/+5
| | | | | | | | | | | | | | | | | The major visible difference here is that in line-table dumps, directory and file names are wrapped in double-quotes; previously, directory names got single quotes and file names were not quoted at all. The improvement in this patch is that when a DWARF v5 line table header has indirect strings, in a verbose dump these will all have their section[offset] printed as well as the name itself. This matches the format used for dumping strings in the .debug_info section. Differential Revision: https://reviews.llvm.org/D42802 llvm-svn: 324270
* [MC] Fix assembler infinite loop on EH table using LEB padding.Rafael Espindola2018-02-011-0/+28
| | | | | | | | | | | | | Fix the infinite loop reported in PR35809. It can occur with GCC-style EH table assembly, where the compiler relies on the assembler to calculate the offsets in the EH table. Also see https://sourceware.org/bugzilla/show_bug.cgi?id=4029 for the equivalent issue in the GNU assembler. Patch by Ryan Prichard! llvm-svn: 323934
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