Commit Graph

306 Commits

Author SHA1 Message Date
Kevin Enderby 96918bc406 Fix the assembler to print a better relocatable expression error
diagnostic that includes location information.

Currently if one has this assembly:

	.quad (0x1234 + (4 * SOME_VALUE))

where SOME_VALUE is undefined ones gets the less than
useful error message with no location information:

% clang -c x.s
clang -cc1as: fatal error: error in backend: expected relocatable expression

With this fix one now gets a more useful error message
with location information:

% clang -c x.s 
x.s:5:8: error: expected relocatable expression
 .quad (0x1234 + (4 * SOME_VALUE))
       ^

To do this I plumbed the SMLoc through the MCObjectStreamer
EmitValue() and EmitValueImpl() interfaces so it could be used
when creating the MCFixup.

rdar://12391022

llvm-svn: 206906
2014-04-22 17:27:29 +00:00
NAKAMURA Takumi 7a25ca63ba Remove DOS CRLF.
llvm-svn: 206894
2014-04-22 13:35:50 +00:00
Yaron Keren 421304d18c Patch by Ray Donnelly to print register names instead of numbers.
http://reviews.llvm.org/D3422

llvm-svn: 206683
2014-04-19 05:40:09 +00:00
Chandler Carruth 1911882569 Revert r206565 (and r206566 which updated tests).
This commit was attributed to a different person from the person who
posted the patch to the list, and the person who posted it the list
claimed when they did that they were not the author, but that the author
was yet a third person. I don't know what is going on here, but
reverting until the attribution is clear and the author has explicitly
contributed the patch.

Also, the review hasn't really involved any of the MC maintainers and
that seems questionable too.

llvm-svn: 206576
2014-04-18 09:35:51 +00:00
Yaron Keren 8ca45e0c05 Patch by Ray Donnelly.
Emit WIN64 SEH registers by name instead of just number.

llvm-svn: 206565
2014-04-18 08:03:38 +00:00
Craig Topper bb694de649 [C++11] More 'nullptr' conversion or in some cases just using a boolean check instead of comparing to nullptr.
llvm-svn: 206129
2014-04-13 04:57:38 +00:00
David Blaikie 3464161070 DebugInfo: Avoid creating unnecessary/empty line tables and remove the special case of '0' in DwarfCompileUnit::initStmtList by just always using a label difference
This moves one case of raw text checking down into the MCStreamer
interfaces in the form of a virtual function, even if we ultimately end
up consolidating on the one-or-many line tables issue one day, this is
nicer in the interim. This just generally streamlines a bunch of use
cases into a common code path.

llvm-svn: 205287
2014-04-01 08:07:52 +00:00
David Blaikie 8bf66c4f3f DebugInfo: Emit relocation to debug_line section when emitting asm for asm
I don't think this is reachable by any frontend (why would you transform
asm to asm+debug info?) but it helps tidy up some of this code, avoid
the weird special case of "emit the first CU, store the label, then emit
the rest" in MCDwarfLineTable::Emit by instead having the
DWARF-for-assembly case use the same codepath as DwarfDebug.cpp, by
registering the label of the debug_line section, thus causing it to be
emitted. (with a special case in asm output to just emit the label since
asm output uses the .loc directives, etc, rather than the debug_loc
directly)

llvm-svn: 205286
2014-04-01 07:35:52 +00:00
Tim Northover 53d3251851 MachO: Add linker-optimisation hint framework to MC.
Another part of the ARM64 backend (so tests will be following soon).
This is currently used by the linker to relax adrp/ldr pairs into nops
where possible, though could well be more broadly applicable.

llvm-svn: 205084
2014-03-29 07:34:53 +00:00
Nuno Lopes 31617266ea remove a bunch of unused private methods
found with a smarter version of -Wunused-member-function that I'm playwing with.
Appologies in advance if I removed someone's WIP code.

 include/llvm/CodeGen/MachineSSAUpdater.h            |    1 
 include/llvm/IR/DebugInfo.h                         |    3 
 lib/CodeGen/MachineSSAUpdater.cpp                   |   10 --
 lib/CodeGen/PostRASchedulerList.cpp                 |    1 
 lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp    |   10 --
 lib/IR/DebugInfo.cpp                                |   12 --
 lib/MC/MCAsmStreamer.cpp                            |    2 
 lib/Support/YAMLParser.cpp                          |   39 ---------
 lib/TableGen/TGParser.cpp                           |   16 ---
 lib/TableGen/TGParser.h                             |    1 
 lib/Target/AArch64/AArch64TargetTransformInfo.cpp   |    9 --
 lib/Target/ARM/ARMCodeEmitter.cpp                   |   12 --
 lib/Target/ARM/ARMFastISel.cpp                      |   84 --------------------
 lib/Target/Mips/MipsCodeEmitter.cpp                 |   11 --
 lib/Target/Mips/MipsConstantIslandPass.cpp          |   12 --
 lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp              |   21 -----
 lib/Target/NVPTX/NVPTXISelDAGToDAG.h                |    2 
 lib/Target/PowerPC/PPCFastISel.cpp                  |    1 
 lib/Transforms/Instrumentation/AddressSanitizer.cpp |    2 
 lib/Transforms/Instrumentation/BoundsChecking.cpp   |    2 
 lib/Transforms/Instrumentation/MemorySanitizer.cpp  |    1 
 lib/Transforms/Scalar/LoopIdiomRecognize.cpp        |    8 -
 lib/Transforms/Scalar/SCCP.cpp                      |    1 
 utils/TableGen/CodeEmitterGen.cpp                   |    2 
 24 files changed, 2 insertions(+), 261 deletions(-)

llvm-svn: 204560
2014-03-23 17:09:26 +00:00
Saleem Abdulrasool 44419fc3cd ARM IAS: properly handle function entries in .thumb
When a label is parsed, check if there is type information available for the
label.  If so, check if the symbol is a function.  If the symbol is a function
and we are in thumb mode and no explicit thumb_func has been emitted, adjust the
symbol data to indicate that the function definition is a thumb function.

The application of this inferencing is improved value handling in the object
file (the required thumb bit is set on symbols which are thumb functions).  It
also helps improve compatibility with binutils.

The one complication that arises from this handling is the MCAsmStreamer.  The
default implementation of getOrCreateSymbolData in MCStreamer does not support
tracking the symbol data.  In order to support the semantics of thumb functions,
track symbol data in assembly streamer.  Although O(n) in number of labels in
the TU, this is already done in various other streamers and as such the memory
overhead is not a practical concern in this scenario.

llvm-svn: 204544
2014-03-22 19:26:18 +00:00
Zoran Jovanovic 28221d8bc1 Mark alias symbols as microMIPS if necessary. Differential Revision: http://llvm-reviews.chandlerc.com/D3080
llvm-svn: 204323
2014-03-20 09:44:49 +00:00
Jim Grosbach 448334a738 Darwin: Add assembler directives to create version-min load commands.
Allow object files to be tagged with a version-min load command for iOS
or MacOSX.

Teach macho-dump to understand the version-min load commands for
testcases.

rdar://11337778

llvm-svn: 204190
2014-03-18 22:09:05 +00:00
David Blaikie c2df16b6d3 DebugInfo: Use MC line table file entry uniquing for non-asm input as well.
See r204027 for the precursor to this that applied to asm debug info.

This required some non-obvious API changes to handle the case of asm
output (we never go asm->asm so this didn't come up in r204027): the
modification of the file/directory name by MCDwarfLineTableHeader needed
to be reflected in the MCAsmStreamer caller so it could print the
appropriate .file directive, so those StringRef parameters are now
non-const ref (in/out) parameters rather than just const.

llvm-svn: 204069
2014-03-17 18:13:58 +00:00
David Blaikie c714ef4581 DebugInfo: Improve reuse of file table entries in asm debug info
The previous deduping strategy was woefully inadequate - it only
considered the most recent file used and avoided emitting a duplicate in
that case - never considering the a/b/a scenario.

It was also lacking when it came to directory paths as the previous
filename would never match the current if the filename had been split
into file and directory components.

This change builds caching functionality into the line table at the
lowest level in an optional form (a file number of 0 indicates that one
should be chosen and returned) and will eventually be reused by the
normal source level debugging DWARF emission.

llvm-svn: 204027
2014-03-17 01:52:11 +00:00
Craig Topper 12f0ca454b De-virtualize a method since it doesn't override anything (yay 'override' keyword) and its class is in an anonymous namespace.
llvm-svn: 203341
2014-03-08 07:07:08 +00:00
Craig Topper 34a61bc97a [C++11] Add 'override' keyword to virtual methods that override their base class.
llvm-svn: 203340
2014-03-08 07:02:02 +00:00
Ahmed Charles 56440fd820 Replace OwningPtr<T> with std::unique_ptr<T>.
This compiles with no changes to clang/lld/lldb with MSVC and includes
overloads to various functions which are used by those projects and llvm
which have OwningPtr's as parameters. This should allow out of tree
projects some time to move. There are also no changes to libs/Target,
which should help out of tree targets have time to move, if necessary.

llvm-svn: 203083
2014-03-06 05:51:42 +00:00
Rafael Espindola 8377085657 Always print the implicit .text at the start of an asm file.
Before llvm-mc would print it, but llc was assuming that it would produce
another section changing directive before one was needed. That assumption is
false with inline asm.

Fixes PR19049.

Another option would be to always create the section, but in the asm printer
avoid printing sections changes during initialization. That would work, but
* We do use the fact that llvm-mc prints it in testing. The tests can be changed
  if needed.
* A quick poll on IRC suggest that most developers prefer the implicit .text to
  be printed.

llvm-svn: 203001
2014-03-05 20:09:15 +00:00
Craig Topper 73156025e0 Switch all uses of LLVM_OVERRIDE to just use 'override' directly.
llvm-svn: 202621
2014-03-02 09:09:27 +00:00
Diego Novillo b1b5007c52 Fix generation of 'isa' and 'discriminator' keywords.
Summary:
There should be a space before each of these two keywords to avoid
generating invalid assembly files.

NOTE: I could not find an obvious maintainers in CODE_OWNERS.TXT, but
      this seems related to debug info.

Reviewers: echristo

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D2791

llvm-svn: 201359
2014-02-13 20:05:03 +00:00
Rafael Espindola b4eec1daa1 Remove support for not using .loc directives.
Clang itself was not using this. The only way to access it was via llc.

llvm-svn: 200862
2014-02-05 18:00:21 +00:00
Rafael Espindola 7cbbd28c67 Every target uses .align. Simplify.
llvm-svn: 200782
2014-02-04 18:39:51 +00:00
David Majnemer 522d3db745 MC: Improve the .fill directive's compatibility with GAS
Per the GAS documentation, .fill should permit pattern widths that
aren't a power of two. While I was in the neighborhood, I added some
sanity checking. This change was motivated by a use of this construct
in the Linux Kernel.

llvm-svn: 200606
2014-02-01 07:19:38 +00:00
David Woodhouse 9784cef38d Explictly pass MCSubtargetInfo to MCCodeEmitter::EncodeInstruction()
llvm-svn: 200348
2014-01-28 23:13:07 +00:00
David Woodhouse e6c13e4abd Change MCStreamer EmitInstruction interface to take subtarget info
llvm-svn: 200345
2014-01-28 23:12:42 +00:00
David Majnemer e035cf9ce4 MC: Add support for .cfi_startproc simple
This commit allows LLVM MC to process .cfi_startproc directives when
they are followed by an additional `simple' identifier. This signals to
elide the emission of target specific CFI instructions that would
normally occur initially.

This fixes PR16587.

Differential Revision: http://llvm-reviews.chandlerc.com/D2624

llvm-svn: 200227
2014-01-27 17:20:25 +00:00
Rafael Espindola 24ea09ef7d Construct the MCStreamer before constructing the MCTargetStreamer.
This has a few advantages:
* Only targets that use a MCTargetStreamer have to worry about it.
* There is never a MCTargetStreamer without a MCStreamer, so we can use a
  reference.
* A MCTargetStreamer can talk to the MCStreamer in its constructor.

llvm-svn: 200129
2014-01-26 06:06:37 +00:00
Rafael Espindola 0e2ccb2df1 Simplify the logic for deciding when to initialize the sections.
llvm-svn: 199971
2014-01-24 03:54:40 +00:00
Rafael Espindola 61adb27de4 Most streamers' InitSections just create a text section. Make that the default
llvm-svn: 199969
2014-01-24 02:42:26 +00:00
Rafael Espindola f144034c98 InitToTextSection is redundant with InitSections. Remove it.
llvm-svn: 199955
2014-01-23 23:14:14 +00:00
Rafael Espindola 0b694814a8 Add an emitRawComment function and use it to simplify some uses of EmitRawText.
llvm-svn: 199397
2014-01-16 16:28:37 +00:00
Timur Iskhodzhanov c1fb2d6111 [COFF] Add support for the .secidx directive
Reviewed at http://llvm-reviews.chandlerc.com/D2445

llvm-svn: 197826
2013-12-20 18:15:00 +00:00
David Blaikie d8c5b4e8ef MCStreamer: Reimplement the virtual EmitRawText as a protected member, EmitRawTextImpl, to avoid string literal ambiguities
Also improve the implementation of EmitRawText(Twine) so it doesn't
bother using the SmallString buffer if the Twine is a simple StringRef
anyway.

llvm-svn: 193378
2013-10-24 22:43:10 +00:00
Rafael Espindola 5645bade1b Move .ident handling to MCStreamer.
No functionality change, but exposes the API so that codegen can use it too.

Patch by Katya Romanova.

llvm-svn: 192757
2013-10-16 01:05:45 +00:00
Rafael Espindola a17151ad5a Add a MCTargetStreamer interface.
This patch fixes an old FIXME by creating a MCTargetStreamer interface
and moving the target specific functions for ARM, Mips and PPC to it.

The ARM streamer is still declared in a common place because it is
used from lib/CodeGen/ARMException.cpp, but the Mips and PPC are
completely hidden in the corresponding Target directories.

I will send an email to llvmdev with instructions on how to use this.

llvm-svn: 192181
2013-10-08 13:08:17 +00:00
Rafael Espindola ac4ad25a00 Remove some really nasty uses of hasRawTextSupport.
When MC was first added, targets could use hasRawTextSupport to keep features
working before they were added to the MC interface.

The design goal of MC is to provide an uniform api for printing assembly and
object files. Short of relaxations and other corner cases, a object file is
just another representation of the assembly.

It was never the intention that targets would keep doing things like

if (hasRawTextSupport())
  Set flags in one way.
else
  Set flags in another way.

When they do that they create two code paths and the object file is no longer
just another representation of the assembly. This also then requires testing
with llc -filetype=obj, which is extremelly brittle.

This patch removes some of these hacks by replacing them with smaller ones.
The ARM flag setting is trivial, so I just moved it to the constructor. For
Mips, the patch adds two temporary hack directives that allow the assembly
to represent the same things as the object file was already able to.

The hope is that the mips developers will replace the hack directives with
the same ones that gas uses and drop the -print-hack-directives flag.

I will also try to implement a target streamer interface, so that we can
move this out of the common code.

In summary, for any new work, two rules of the thumb are
  * Don't use "llc -filetype=obj" in tests.
  * Don't add calls to hasRawTextSupport.

llvm-svn: 192035
2013-10-05 16:42:21 +00:00
Venkatraman Govindaraju 3816d43a9a Implements parsing and emitting of .cfi_window_save in MC.
llvm-svn: 191431
2013-09-26 14:49:40 +00:00
Richard Mitton 089ed89e76 Fixed debug_aranges handling for common symbols.
The size of common symbols is now tracked correctly, so they can be listed in the arange section without needing knowledge of other following symbols.

.comm (and .lcomm) do not indicate to the system assembler any particular section to use, so we have to treat them as having no section.

Test case update to account for this.

llvm-svn: 191210
2013-09-23 17:56:20 +00:00
Richard Mitton 21101b3231 Added support for generate DWARF .debug_aranges sections automatically.
llvm-svn: 191052
2013-09-19 23:21:01 +00:00
Eric Christopher 7eec59e2f1 Remove extraneous space, the asm printing infrastructure adds a space
in normally.

llvm-svn: 191026
2013-09-19 18:41:40 +00:00
Bill Wendling 550c76dbd6 Call generateCompactUnwindEncodings() right before we need to output the frame information.
There are more than one paths to where the frame information is emitted. Place
the call to generateCompactUnwindEncodings() into the method which outputs the
frame information, thus ensuring that the encoding is there for every path. This
involved threading the MCAsmBackend object through to this method.

<rdar://problem/13623355>

llvm-svn: 190335
2013-09-09 19:48:37 +00:00
Saleem Abdulrasool 4208b61858 [CodeGen] prevent abnormal on invalid attributes
Currently, when an invalid attribute is encountered on processing a .s file,
clang will abort due to llvm_unreachable.  Invalid user input should not cause
an abnormal termination of the compiler.  Change the interface to return a
boolean to indicate the failure as a first step towards improving hanlding of
malformed user input to clang.

Signed-off-by: Saleem Abdulrasool <compnerd@compnerd.org>
llvm-svn: 188047
2013-08-09 01:52:03 +00:00
Rafael Espindola 64e1af8eb9 Remove address spaces from MC.
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).

llvm-svn: 185436
2013-07-02 15:49:13 +00:00
Bill Wendling bc07a8900c Use pointers to the MCAsmInfo and MCRegInfo.
Someone may want to do something crazy, like replace these objects if they
change or something.

No functionality change intended.

llvm-svn: 184175
2013-06-18 07:20:20 +00:00
Rafael Espindola 3bc8e71909 Move PathV2.h to Path.h
Most clients have already been moved from Path V1 to V2. The ones using V1
now include PathV1.h explicitly.

llvm-svn: 183801
2013-06-11 22:21:28 +00:00
Peter Collingbourne 2f495b93ee Add support for subsections to the ELF assembler. Fixes PR8717.
Differential Revision: http://llvm-reviews.chandlerc.com/D598

llvm-svn: 179725
2013-04-17 21:18:16 +00:00
Nico Rieck 334c7bc7eb Use object file specific section type for initial text section
llvm-svn: 179494
2013-04-14 21:18:36 +00:00
Manman Ren 1e4272085d Debug Info: store the files and directories for each compile unit.
We now emit a line table for each compile unit. To reduce the prologue size
of each line table, the files and directories used by each compile unit are
stored in std::map<unsigned, std::vector< > > instead of std::vector< >.

The prologue for a lto'ed image can be as big as 93K. Duplicating 93K for each
compile unit causes a huge increase of debug info. With this patch, each
prologue will only emit the files required by the compile unit.

rdar://problem/13342023

llvm-svn: 176605
2013-03-07 01:42:00 +00:00
Chandler Carruth 339468ece6 Fix another typo in the classof definitions that doesn't (currently)
have any effect. Spotted by Eli in review, thanks!!!

llvm-svn: 174121
2013-02-01 00:04:33 +00:00