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* [DEBUGINFO] Add option that allows to disable emission of flags in .loc ↵Alexey Bataev2018-04-031-19/+21
| | | | | | | | | | | | | | | | | | directives. Summary: Some targets do not support extended format of .loc directive and support only simple format: .loc <FileID> <Line> <Column>. Patch adds MCAsmInfo flag and option that allows emit .loc directive without additional flags. Reviewers: echristo Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D45184 llvm-svn: 329089
* Reapply "[DWARFv5] Emit file 0 to the line table."Paul Robinson2018-03-291-28/+63
| | | | | | | | | | | | | | | | | 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 Potapenko2018-03-281-58/+28
| | | | | | | | | | | | | | | 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 Robinson2018-03-271-28/+58
| | | | | | | | | | | | | | | | 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
* Use .set instead of = when printing assignment in assembly outputKrzysztof Parzyszek2018-03-271-1/+2
| | | | | | | | | On Hexagon "x = y" is a syntax used in most instructions, and is not treated as a directive. Differential Revision: https://reviews.llvm.org/D44256 llvm-svn: 328635
* [MC] fix documentation comments; NFCSanjay Patel2018-03-131-25/+14
| | | | llvm-svn: 327429
* Delay creating an alias for @@@.Rafael Espindola2018-03-091-4/+3
| | | | | | | | | | | With this we only create an alias for @@@ once we know if it should use @ or @@. This avoids last minutes renames and hacks to handle MS names. This only handles the ELF writer. LTO still has issues with @@@ aliases. llvm-svn: 327160
* Don't treat .symver as a regular alias definition.Rafael Espindola2018-03-091-0/+12
| | | | | | | | | | | | | | This patch starts simplifying the handling of .symver. For now it just moves the responsibility for creating an alias down to the streamer. With that the asm streamer can pass a .symver unchanged, which is nice since gas cannot parse "foo@bar = zed". In a followup I hope to move the handling down to the writer so that we don't need special hacks for avoiding breaking names with @@@ on windows. llvm-svn: 327101
* Revert "Reapply "[DWARFv5] Emit file 0 to the line table.""Alexander Kornienko2018-03-071-58/+28
| | | | | | | | | | | | | | | | 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 Robinson2018-03-061-28/+58
| | | | | | | | 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 Robinson2018-03-061-58/+28
| | | | | | | | | Caused an asan failure. This reverts commit d54883f081186cdcce74e6f98cfc0438579ec019. aka r326758 llvm-svn: 326762
* [DWARFv5] Emit file 0 to the line table.Paul Robinson2018-03-061-28/+58
| | | | | | | | | | | 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] Support DWARF v5 source code embedding extensionScott Linder2018-02-231-2/+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 Robinson2018-02-221-12/+13
| | | | | | | | should not trigger assertions. Differential Revision: https://reviews.llvm.org/D43152 llvm-svn: 325831
* Use assembler expressions to lay out the EH LSDA.Rafael Espindola2018-02-091-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rely on the assembler to finalize the layout of the DWARF/Itanium exception-handling LSDA. Rather than calculate the exact size of each thing in the LSDA, use assembler directives: To emit the offset to the TTBase label: .uleb128 .Lttbase0-.Lttbaseref0 .Lttbaseref0: To emit the size of the call site table: .uleb128 .Lcst_end0-.Lcst_begin0 .Lcst_begin0: ... call site table entries ... .Lcst_end0: To align the type info table: ... action table ... .balign 4 .long _ZTIi .long _ZTIl .Lttbase0: Using assembler directives simplifies the compiler and allows switching the encoding of offsets in the call site table from udata4 to uleb128 for a large code size savings. (This commit does not change the encoding.) The combination of the uleb128 followed by a balign creates an unfortunate dependency cycle that the assembler must sometimes resolve either by padding an LEB or by inserting zero padding before the type table. See PR35809 or GNU as bug 4029. Patch by Ryan Prichard! llvm-svn: 324749
* [ELF] Print the .type assembly directive correctly for STT_NOTYPEOliver Stannard2018-02-091-1/+1
| | | | | | | | | | The llvm assembly parser and gas both accept "@notype" in the .type assembly directive, but we were printing it as "@no_type", which isn't accepted by either assembler. Differential revision: https://reviews.llvm.org/D43116 llvm-svn: 324731
* [DWARFv5] CodeGen support for MD5 file checksumsPaul Robinson2018-01-121-0/+4
| | | | | | | | | | Pass MD5 checksums through from IR to assembly/object files. After this, getting Clang to compute the MD5 should be the last step to supporting MD5 in the DWARF v5 line table header. Differential Revision: https://reviews.llvm.org/D41926 llvm-svn: 322391
* Reland "Emit Function IDs table for Control Flow Guard"Adrian McCarthy2018-01-091-0/+7
| | | | | | | | | | | | | | | | | Adds option /guard:cf to clang-cl and -cfguard to cc1 to emit function IDs of functions that have their address taken into a section named .gfids$y for compatibility with Microsoft's Control Flow Guard feature. The original patch didn't have the lit.local.cfg file that restricts the new test to x86, thus the new test was failing on the non-x86 bots. Differential Revision: https://reviews.llvm.org/D40531 The reverts r322008, which was a revert of r322005. This reverts commit a05b89f9aca70597dc79fe97bc49b50b51f525ba. llvm-svn: 322136
* [DWARFv5] MC support for MD5 file checksumsPaul Robinson2018-01-091-1/+3
| | | | | | | Extend .file directive syntax to allow specifying an MD5 checksum for the source file. Emit the checksums in DWARF v5 line tables. llvm-svn: 322134
* Inline a emitFill variant that is only used once. NFC.Rafael Espindola2018-01-091-10/+0
| | | | llvm-svn: 322111
* Make one of the emitFill methods non virtual. NFC.Rafael Espindola2018-01-091-12/+4
| | | | | | This is just preparatory work to fix PR35858. llvm-svn: 322108
* Revert "Emit Function IDs table for Control Flow Guard"Adrian McCarthy2018-01-081-7/+0
| | | | | | | | | | The new test fails on the Hexagon bot. Reverting while I investigate. This reverts https://reviews.llvm.org/rL322005 This reverts commit b7e0026b4385180c378edc658ec91a39566f2942. llvm-svn: 322008
* Emit Function IDs table for Control Flow GuardAdrian McCarthy2018-01-081-0/+7
| | | | | | | | | | Adds option /guard:cf to clang-cl and -cfguard to cc1 to emit function IDs of functions that have their address taken into a section named .gfids$y for compatibility with Microsoft's Control Flow Guard feature. Differential Revision: https://reviews.llvm.org/D40531 llvm-svn: 322005
* [NVPTX] Initial adaptation of MCAsmStreamer/MCTargetStreamer for debug info ↵Alexey Bataev2017-12-201-14/+33
| | | | | | | | | | | | | | | | | | | | | in Cuda. Summary: Initial changes in interfaces of MCAsmStreamer/MCTargetStreamer for correct debug info emission for Cuda. 1. PTX foramt does not support `.ascii` directives. Added the ability to nullify it. 2. The initial function label must follow the first debug `.loc` directive, not be followed by. 3. DWARF sections must be enclosed in braces. Reviewers: hfinkel, probinson, jlebar, rafael, echristo Subscribers: sdardis, nemanjai, llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D40033 llvm-svn: 321178
* MC: Add support for mach-o build_versionMatthias Braun2017-12-141-7/+33
| | | | | | | | LC_BUILD_VERSION is a new load command superseding the previously used LC_XXX_MIN_VERSION commands. This adds an assembler directive along with encoding/streaming support. llvm-svn: 320661
* Remove redundant includes from lib/MC.Michael Zolotukhin2017-12-131-3/+0
| | | | llvm-svn: 320624
* [MC] Handle unknown literal register numbers in .cfi_* directivesJake Ehrlich2017-12-011-4/+9
| | | | | | | | | | | | | | | | | r230670 introduced a step to map EH register numbers to standard DWARF register numbers. This failed to consider the case when a user .cfi_* directive uses an integer literal rather than a register name, to specify a DWARF register number that has no corresponding LLVM register number (e.g. a special register that the compiler and assembler have no name for). Fixes PR34028. Patch by Roland McGrath Differential Revision: https://reviews.llvm.org/D36493 llvm-svn: 319586
* [AsmPrinterDwarf] Add support for .cfi_restore directiveFrancis Visoiu Mistrih2017-11-021-0/+8
| | | | | | | | | | | | | | As of today we only use .cfi_offset to specify the offset of a CSR, but we never use .cfi_restore when the CSR is restored. If we want to perform a more advanced type of shrink-wrapping, we need to use .cfi_restore in order to switch the CFI state between blocks. This patch only aims at adding support for the directive. Differential Revision: https://reviews.llvm.org/D36114 llvm-svn: 317199
* [codeview] Implement FPO data assembler directivesReid Kleckner2017-10-111-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: This adds a set of new directives that describe 32-bit x86 prologues. The directives are limited and do not expose the full complexity of codeview FPO data. They are merely a convenience for the compiler to generate more readable assembly so we don't need to generate tons of labels in CodeGen. If our prologue emission changes in the future, we can change the set of available directives to suit our needs. These are modelled after the .seh_ directives, which use a different format that interacts with exception handling. The directives are: .cv_fpo_proc _foo .cv_fpo_pushreg ebp/ebx/etc .cv_fpo_setframe ebp/esi/etc .cv_fpo_stackalloc 200 .cv_fpo_endprologue .cv_fpo_endproc .cv_fpo_data _foo I tried to follow the implementation of ARM EHABI CFI directives by sinking most directives out of MCStreamer and into X86TargetStreamer. This helps avoid polluting non-X86 code with WinCOFF specific logic. I used cdb to confirm that this can show locals in parent CSRs in a few cases, most importantly the one where we use ESI as a frame pointer, i.e. the one in http://crbug.com/756153#c28 Once we have cdb integration in debuginfo-tests, we can add integration tests there. Reviewers: majnemer, hans Subscribers: aemerson, mgorny, kristof.beyls, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D38776 llvm-svn: 315513
* [SEH] Use reportError instead of report_fatal_error for bad directivesReid Kleckner2017-10-101-40/+47
| | | | | | | | | | This makes the .seh_ directives slightly more usable from standalone assembly files. This removes a large number of report_fatal_errors and recovers from the error by ignoring the directive. llvm-svn: 315262
* Re-land "Fix Bug 30978 by emitting cv file checksums."Reid Kleckner2017-09-191-4/+24
| | | | | | | This reverts r313431 and brings back r313374 with a fix to write checksums as binary data and not ASCII hex strings. llvm-svn: 313657
* Revert "Fix Bug 30978 by emitting cv file checksums."Eric Beckmann2017-09-161-23/+4
| | | | | | | | | | | This reverts commit 6389e7aa724ea7671d096f4770f016c3d86b0d54. There is a bug in this implementation where the string value of the checksum is outputted, instead of the actual hex bytes. Therefore the checksum is incorrect, and this prevent pdbs from being loaded by visual studio. Revert this until the checksum is emitted correctly. llvm-svn: 313431
* [llvm] Fix some typos. NFC.Mandeep Singh Grang2017-09-151-2/+2
| | | | | | | | | | | | Reviewers: mcrosier Reviewed By: mcrosier Subscribers: mcrosier, llvm-commits Differential Revision: https://reviews.llvm.org/D37922 llvm-svn: 313388
* Fix Bug 30978 by emitting cv file checksums.Eric Beckmann2017-09-151-4/+23
| | | | | | | | | | | | Summary: The checksums had already been placed in the IR, this patch allows MCCodeView to actually write it out to an MCStreamer. Subscribers: llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D37157 llvm-svn: 313374
* MC: add support for cfi_return_columnSaleem Abdulrasool2017-07-281-0/+7
| | | | | | | | | This adds support for the CFI pseudo-op return_column. This specifies the frame table column which contains the return address. Addresses PR33953! llvm-svn: 309360
* This patch closes PR#32216: Better testing of schedule model instruction ↵Andrew V. Tischenko2017-04-141-6/+28
| | | | | | | | latencies/throughputs. The details are here: https://reviews.llvm.org/D30941 llvm-svn: 300311
* Move some error handling down to MCStreamer.Rafael Espindola2017-02-101-4/+3
| | | | | | | | | This makes sure we get the same redefinition rules regardless of who is printing (asm parser, codegen) and to what (asm, obj). This fixes an unintentional regression in r293936. llvm-svn: 294752
* Only print architecture dependent flags for that architecture.Rafael Espindola2017-01-301-1/+3
| | | | | | | | | | Different architectures can have different meaning for flags in the SHF_MASKPROC mask, so we should always check what the architecture use before checking the flag. NFC for now, but will allow fixing the value of an xmos flag. llvm-svn: 293484
* Reapply "[CodeGen] Fix invalid DWARF info on Win64"Keno Fischer2017-01-021-2/+4
| | | | | | | This reapplies rL289013 (reverted in rL289014) with the fixes identified in D21731. Should hopefully pass the buildbots this time. llvm-svn: 290809
* This is a large patch for X86 AVX-512 of an optimization for reducing code ↵Gadi Haber2016-12-281-4/+6
| | | | | | | | | | | | size by encoding EVEX AVX-512 instructions using the shorter VEX encoding when possible. There are cases of AVX-512 instructions that have two possible encodings. This is the case with instructions that use vector registers with low indexes of 0 - 15 and do not use the zmm registers or the mask k registers. The EVEX encoding prefix requires 4 bytes whereas the VEX prefix can take only up to 3 bytes. Consequently, using the VEX encoding for these instructions results in a code size reduction of ~2 bytes even though it is compiled with the AVX-512 features enabled. Reviewers: Craig Topper, Zvi Rackoover, Elena Demikhovsky Differential Revision: https://reviews.llvm.org/D27901 llvm-svn: 290663
* [Assembler] Better error messages for .org directiveOliver Stannard2016-12-141-2/+4
| | | | | | | | | | | | | | | | | | | | | Currently, the error messages we emit for the .org directive when the expression is not absolute or is out of range do not include the line number of the directive, so it can be hard to track down the problem if a file contains many .org directives. This patch stores the source location in the MCOrgFragment, so that it can be used for diagnostics emitted during layout. Since layout is an iterative process, and the errors are detected during each iteration, it would have been possible for errors to be reported multiple times. To prevent this, I've made the assembler bail out after each iteration if any errors have been reported. This will still allow multiple unrelated errors to be reported in the common case where they are all detected in the first round of layout. Differential Revision: https://reviews.llvm.org/D27411 llvm-svn: 289643
* Revert "[CodeGen] Fix invalid DWARF info on Win64"Keno Fischer2016-12-081-4/+2
| | | | | | Appears to break on build bots. Reverting pending investigation. llvm-svn: 289014
* [CodeGen] Fix invalid DWARF info on Win64Keno Fischer2016-12-081-2/+4
| | | | | | | | | | | | | | | The relocations for `DIEEntry::EmitValue` were wrong for Win64 (emitting FK_Data_4 instead of FK_SecRel_4). This corrects that oversight so that the DWARF data is correct in Win64 COFF files. Fixes PR15393. Patch by Jameson Nash <jameson@juliacomputing.com> based on a patch by David Majnemer. Differential Revision: https://reviews.llvm.org/D21731 llvm-svn: 289013
* [MC] Refactor emitELFSize to make usage more consistent. NFC.Dan Gohman2016-12-011-2/+2
| | | | | | | | | | | | | Move the cast<MCSymbolELF> inside emitELFSize, so that: - it's done in one place instead of at each call - it's more consistent with similar functions like EmitCOFFSafeSEH - ambiguity between cast<> and dyn_cast<> is avoided (which also eliminates an unnecessary dyn_cast call) This also makes it easier to experiment with using ".size" directives on non-ELF targets. llvm-svn: 288437
* Tidy the calls to getCurrentSection().first -> getCurrentSectionOnly to helpEric Christopher2016-10-141-4/+5
| | | | | | readability a bit. llvm-svn: 284202
* Revert r283690, "MC: Remove unused entities."Peter Collingbourne2016-10-101-1/+1
| | | | llvm-svn: 283814
* MC: Remove unused entities.Peter Collingbourne2016-10-091-1/+1
| | | | llvm-svn: 283691
* [codeview] Add new directives to record inlined call site line infoReid Kleckner2016-09-071-20/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: Previously we were trying to represent this with the "contains" list of the .cv_inline_linetable directive, which was not enough information. Now we directly represent the chain of inlined call sites, so we know what location to emit when we encounter a .cv_loc directive of an inner inlined call site while emitting the line table of an outer function or inlined call site. Fixes PR29146. Also fixes PR29147, where we would crash when .cv_loc directives crossed sections. Now we write down the section of the first .cv_loc directive, and emit an error if any other .cv_loc directive for that function is in a different section. Also fixes issues with discontiguous inlined source locations, like in this example: volatile int unlikely_cond = 0; extern void __declspec(noreturn) abort(); __forceinline void f() { if (!unlikely_cond) abort(); } int main() { unlikely_cond = 0; f(); unlikely_cond = 0; } Previously our tables gave bad location information for the 'abort' call, and the debugger wouldn't snow the inlined stack frame for 'f'. It is important to emit good line tables for this code pattern, because it comes up whenever an asan bug occurs in an inlined function. The __asan_report* stubs are generally placed after the normal function epilogue, leading to discontiguous regions of inlined code. Reviewers: majnemer, amccarth Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D24014 llvm-svn: 280822
* [MC] Move .cv_loc management logic out of MCContextReid Kleckner2016-08-261-8/+7
| | | | | | | | | | | MCContext already has many tasks, and separating CodeView out from it is probably a good idea. The .cv_loc tracking was modelled on the DWARF tracking which lived directly in MCContext. Removes the inclusion of MCCodeView.h from MCContext.h, so now there are only 10 build actions while I hack on CodeView support instead of 265. llvm-svn: 279847
* [mips][ias] Support .dtprel[d]word and .tprel[d]word directivesSimon Atanasyan2016-08-221-0/+33
| | | | | | | | | | | | | Assembler directives .dtprelword, .dtpreldword, .tprelword, and .tpreldword generates relocations R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64, R_MIPS_TLS_TPREL32, and R_MIPS_TLS_TPREL64 respectively. The main motivation for this patch is to be able to write test cases for checking correctness of the LLD linker's behaviour. Differential Revision: https://reviews.llvm.org/D23669 llvm-svn: 279439
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