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19 Commits

Author SHA1 Message Date
Igor Kudrin a8ec9de406 [MC] Add --dwarf64 to generate DWARF64 debug info [1/7] 
The patch adds an option `--dwarf64` to instruct a tool to generate
debug information in the 64-bit DWARF format. There is no real
implementation yet, only a few compatibility checks.

Differential Revision: https://reviews.llvm.org/D81143
 2020-06-16 15:50:13 +07:00
Eric Astor ee2c0f76d7 [ms] [llvm-ml] Add a draft MASM parser 
Summary:
Many directives are unavailable, and support for others may be limited.

This first draft has preliminary support for:
    - conditional directives (including errors),
    - data allocation (unsigned types up to 8 bytes, and ALIGN),
    - equates/variables (numeric and text),
    - and procedure directives (without parameters),
as well as COMMENT, ECHO, INCLUDE, INCLUDELIB, PUBLIC, and EXTERN. Text variables (aka text macros) are expanded in-place wherever the identifier occurs.

We deliberately ignore all ml.exe processor directives.

Prominent features not yet supported:
    - structs
    - macros (both procedures and functions)
    - procedures (with specified parameters)
    - substitution & expansion operators

Conditional directives are complicated by the fact that "ifdef rax" is a valid way to check if a file is being assembled for a 64-bit x86 processor; we add support for "ifdef <register>" in general, which requires adding a tryParseRegister method to all MCTargetAsmParsers. (Some targets require backtracking in the non-register case.)

Reviewers: rnk, thakis

Reviewed By: thakis

Subscribers: kerbowa, merge_guards_bot, wuzish, arsenm, dschuff, jyknight, dylanmckay, sdardis, nemanjai, jvesely, mgorny, sbc100, jgravelle-google, hiraditya, aheejin, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, jsji, Jim, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D72680
 2020-02-16 12:30:46 -05:00
Fangrui Song d2bb8c16e7 [MC][TargetMachine] Delete MCTargetOptions::MCPIECopyRelocations 
clang/lib/CodeGen/CodeGenModule performs the -mpie-copy-relocations
check and sets dso_local on applicable global variables. We don't need
to duplicate the work in TargetMachine shouldAssumeDSOLocal.

Verified that -mpie-copy-relocations can still emit PC relative
relocations for external variable accesses.

clang -target x86_64 -fpie -mpie-copy-relocations -c => R_X86_64_PC32
clang -target aarch64 -fpie -mpie-copy-relocations -c => R_AARCH64_ADR_PREL_PG_HI21+R_AARCH64_LDST64_ABS_LO12_NC
 2020-01-01 00:50:18 -08:00
Evgeniy Stepanov aedec3f684 Remove ASan asm instrumentation. 
Summary: It is incomplete and has no users AFAIK.

Reviewers: pcc, vitalybuka

Subscribers: srhines, kubamracek, mgorny, krytarowski, eraman, hiraditya, jdoerfert, #sanitizers, llvm-commits, thakis

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D59154

llvm-svn: 355870
 2019-03-11 21:50:10 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo 
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
 2019-01-19 08:50:56 +00:00
Chandler Carruth 6bda14b313 Sort the remaining #include lines in include/... and lib/.... 
I did this a long time ago with a janky python script, but now
clang-format has built-in support for this. I fed clang-format every
line with a #include and let it re-sort things according to the precise
LLVM rules for include ordering baked into clang-format these days.

I've reverted a number of files where the results of sorting includes
isn't healthy. Either places where we have legacy code relying on
particular include ordering (where possible, I'll fix these separately)
or where we have particular formatting around #include lines that
I didn't want to disturb in this patch.

This patch is *entirely* mechanical. If you get merge conflicts or
anything, just ignore the changes in this patch and run clang-format
over your #include lines in the files.

Sorry for any noise here, but it is important to keep these things
stable. I was seeing an increasing number of patches with irrelevant
re-ordering of #include lines because clang-format was used. This patch
at least isolates that churn, makes it easy to skip when resolving
conflicts, and gets us to a clean baseline (again).

llvm-svn: 304787
 2017-06-06 11:49:48 +00:00
Eugene Zelenko 4b6ff6b86e [MC] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). 
llvm-svn: 294685
 2017-02-10 01:33:54 +00:00
Weiming Zhao b38cfced8d Summary: Currently there is no way to disable deprecated warning from asm like this 
clang  -target arm deprecated-asm.s -c
  deprecated-asm.s:30:9: warning: use of SP or PC in the list is deprecated
       stmia   r4!, {r12-r14}

We have to have an option what can disable it.

Patched by Yin Ma!

Reviewers: joey, echristo, weimingz

Subscribers: llvm-commits, aemerson

Differential Revision: https://reviews.llvm.org/D27219

llvm-svn: 288734
 2016-12-05 23:55:13 +00:00
Sriraman Tallam f29fa586e1 New llc option pie-copy-relocations to optimize access to extern globals. 
This option indicates copy relocations support is available from the linker
when building as PIE and allows accesses to extern globals to avoid the GOT.

Differential Revision: https://reviews.llvm.org/D24849

llvm-svn: 284160
 2016-10-13 20:54:39 +00:00
Nirav Dave e67c14660b Initialize PreserveAsmComments in MCTargetOptions 
llvm-svn: 276905
 2016-07-27 19:19:13 +00:00
David Majnemer 03e2cc3007 [MC, COFF] Support link /incremental conditionally 
Today, we always take into account the possibility that object files
produced by MC may be consumed by an incremental linker.  This results
in us initialing fields which vary with time (TimeDateStamp) which harms
hermetic builds (e.g. verifying a self-host went well) and produces
sub-optimal code because we cannot assume anything about the relative
position of functions within a section (call sites can get redirected
through incremental linker thunks).

Let's provide an MCTargetOption which controls this behavior so that we
can disable this functionality if we know a-priori that the build will
not rely on /incremental.

llvm-svn: 256203
 2015-12-21 22:09:27 +00:00
Colin LeMahieu fe36f83b11 [llvm-mc] Add --no-warn flag with -W alias to disable outputting warnings while assembling. 
llvm-svn: 243338
 2015-07-27 22:39:14 +00:00
Eric Christopher 6e30cd95cb Migrate ABIName to MCTargetOptions so that it can be shared between 
the TargetMachine level and the MC level.

llvm-svn: 225891
 2015-01-14 00:50:31 +00:00
Joerg Sonnenberger 2981591f7f Convert MC command line option for fatal assembler warnings into a 
proper flag.

llvm-svn: 216471
 2014-08-26 18:39:50 +00:00
Eric Christopher 4c5bff36ad Move -dwarf-version to an MC level command line option so it's 
used by all of the MC level tools and codegen. Fix up all uses
in the compiler to use this and set it on the context accordingly.

llvm-svn: 211257
 2014-06-19 06:22:08 +00:00
Eric Christopher eb71972887 Move the verbose asm option to be part of the options struct and 
set appropriately.

llvm-svn: 209258
 2014-05-20 23:59:50 +00:00
Eric Christopher 5d376066df Move more MC options into the MCTargetOptions structure. 
No functional change.

llvm-svn: 208932
 2014-05-15 23:27:49 +00:00
Eric Christopher 737e089bda Move the TargetMachine MC options to MCTargetOptions. No functional 
change.

llvm-svn: 208832
 2014-05-15 01:08:00 +00:00
Evgeniy Stepanov 0a951b775e Create MCTargetOptions. 
For now it contains a single flag, SanitizeAddress, which enables
AddressSanitizer instrumentation of inline assembly.

Patch by Yuri Gorshenin.

llvm-svn: 206971
 2014-04-23 11:16:03 +00:00