Commit Graph

648 Commits

Author SHA1 Message Date
Chad Rosier f43fcf5194 [ms-inline asm] Add a comment about the determinism of the rewrite sort.
llvm-svn: 175082
2013-02-13 21:27:17 +00:00
Chad Rosier eb5c16893b [ms-inline-asm] Use an array_pod_sort, rather than a std:sort.
llvm-svn: 175063
2013-02-13 18:38:58 +00:00
Chad Rosier b2144ce644 [ms-inline-asm] Make sure the AsmRewrite list is sorted in lexical order.
rdar://13202662

llvm-svn: 175021
2013-02-13 01:03:13 +00:00
Chad Rosier c7f552c33e [ms-inline-asm] Implement align directive (which is roughly equivalent to .align).
Also, allow _EMIT and __EMIT for the emit directive.  We already do the same
for TYPE, SIZE, and LENGTH.
rdar://13200215

llvm-svn: 175008
2013-02-12 21:33:51 +00:00
Guy Benyei 83c74e9fad Add static cast to unsigned char whenever a character classification function is called with a signed char argument, in order to avoid assertions in Windows Debug configuration.
llvm-svn: 175006
2013-02-12 21:21:59 +00:00
Chad Rosier 5f6b4d3fc5 [ms-inline asm] Pass the length of the IDVal, so we can do a proper AsmRewrite.
llvm-svn: 174999
2013-02-12 19:42:32 +00:00
Chad Rosier 93d629fdb8 [ms-inline asm] Accept the emit directive as either _emit or __emit.
llvm-svn: 174998
2013-02-12 19:31:23 +00:00
Chad Rosier f72d06a919 [ms-inline asm] Add support for lexing binary integers with a [bB] suffix.
This is complicated by backward labels (e.g., 0b can be both a backward label
and a binary zero).  The current implementation assumes [0-9]b is always a
label and thus it's possible for 0b and 1b to not be interpreted correctly for
ms-style inline assembly.  However, this is relatively simple to fix in the
inline assembly (i.e., drop the [bB]).

This patch also limits backward labels to [0-9]b, so that only 0b and 1b are
ambiguous.
Part of rdar://12470373

llvm-svn: 174983
2013-02-12 18:29:02 +00:00
Chad Rosier 559cea4e10 Update error message due to previous commit, r174926.
llvm-svn: 174927
2013-02-12 01:12:24 +00:00
Chad Rosier 8bc655605b [ms-inline asm] Add support for lexing hexidecimal integers with a [hH] suffix.
Part of rdar://12470373

llvm-svn: 174926
2013-02-12 01:00:01 +00:00
Kevin Enderby 81c944cadb Add a warning when there is a macro defintion that has named parameters but
the body does not use them and it appears the body has positional parameters.

This can cause unexpected results as in the added test case.  As the darwin
version of gas(1) which only supported positional parameters, happened to
ignore the named parameters.  Now that we want to support both styles of
macros we issue a warning in this specific case.

rdar://12861644

llvm-svn: 173199
2013-01-22 21:44:53 +00:00
Kevin Enderby 0017d8a469 Have the integrated assembler give an error if $1 is used as an identifier in
an expression.  Currently this bug causes the line to be ignored in a
release build and an assert in a debug build.

rdar://13062484

llvm-svn: 173195
2013-01-22 21:09:20 +00:00
Daniel Dunbar 16004b8324 [MC/Mach-O] Add AsmParser support for .linker_option directive.
llvm-svn: 172778
2013-01-18 01:25:48 +00:00
Daniel Dunbar 4038fa3c82 [MC] Expose ParseEscapedString to target AsmParser implementations.
llvm-svn: 172777
2013-01-18 01:25:33 +00:00
Daniel Dunbar b94c578c0c [MC] Fix 80-col violas.
llvm-svn: 172776
2013-01-18 01:25:25 +00:00
Chad Rosier d0ed73acb4 [ms-inline asm] Add support for the 'SIZE' and 'LENGTH' operators.
Part of rdar://12576868

llvm-svn: 172743
2013-01-17 19:21:48 +00:00
Eli Bendersky 880247148c Some small (and mostly cosmetic) fixes.
llvm-svn: 172640
2013-01-16 19:32:36 +00:00
Eli Bendersky a313ae6cf9 Now that GenericAsmParser was folded into AsmParser, some methods and types can
return into the safe harbor of AsmParser's private areas.

llvm-svn: 172637
2013-01-16 18:56:50 +00:00
Eli Bendersky 29b9f47796 Use the ExtensionDirectiveHandler type in other places where it makes sense.
Since we already have this type it's a shame to keep dragging a pair of object
and method around explicitly.

llvm-svn: 172584
2013-01-16 00:50:52 +00:00
Chad Rosier 7245033a98 [ms-inline asm] Address the FIXME in AsmParser.cpp.
// FIXME: Constraints are hard coded to 'm', but we need an 'r'
// constraint for addressof.  This needs to be cleaned up!

Test cases are already in place.  Specifically,
clang/test/CodeGen/ms-inline-asm.c t15(), t16(), and t24().

llvm-svn: 172569
2013-01-15 23:07:53 +00:00
Eli Bendersky 17233946bc Refactor generic Asm directive parsing.
After discussing the refactoring with Jim and Daniel, the following changes were
made:

* All generic directive parsing is now done by AsmParser itself. The previous
  division between it and GenericAsmParser did not have clear boundaries and
  just produced unnatural code of GenericAsmParser juggling the internals of
  AsmParser through an interface. 
  The division of responsibilities is now clear: target-specific directives,
  other extensions (used by platform-specific parseres), and generic directives.
* Priority for directive parsing was reshuffled to ask extensions first and
  check the generic directives later.

No change in functionality.

llvm-svn: 172568
2013-01-15 22:59:42 +00:00
Eli Bendersky e6f4c68373 Now GenericAsmParser and AsmParser are no longer friends, GenericAsmParser can
simply use the getParser method from MCAsmParserExtension, working through the
MCAsmParser interface. There's no longer a need to overload that method to
cast it to the concrete AsmParser.

llvm-svn: 172491
2013-01-14 23:43:18 +00:00
Eli Bendersky 382741283f Properly encapsulate additional methods and data from AsmParser.
This finally allows AsmParser to no longer list GenericAsmParser as a friend.
All member vars directly accessed by GenericAsmParser have been properly
encapsulated and exposed through the MCAsmParser interface. This reduces the
coupling between AsmParser and GenericAsmParser.

llvm-svn: 172490
2013-01-14 23:22:36 +00:00
Eli Bendersky 0a8fbdd015 Move CheckForValidSection to the MCAsmParser interface.
Now that it behaves itself in terms of streamer independence (r172450), this
method can be moved to MCAsmParser to be available to all extensions,
overriding, etc.

-- -This line, and those below, will be ignored--

M    lib/MC/MCParser/AsmParser.cpp
M    include/llvm/MC/MCParser/MCAsmParser.h

llvm-svn: 172451
2013-01-14 19:15:01 +00:00
Eli Bendersky cbb2514d51 Expose an InitToTextSection through MCStreamer.
The aim of this patch is to fix the following piece of code in the
platform-independent AsmParser:

void AsmParser::CheckForValidSection() {
  if (!ParsingInlineAsm && !getStreamer().getCurrentSection()) {
    TokError("expected section directive before assembly directive");
    Out.SwitchSection(Ctx.getMachOSection(
                        "__TEXT", "__text",
                        MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
                        0, SectionKind::getText()));
  }
}

This was added for the "-n" option of llvm-mc.

The proposed fix adds another virtual method to MCStreamer, called
InitToTextSection. Conceptually, it's similar to the existing
InitSections which initializes all common sections and switches to
text. The new method is implemented by each platform streamer in a way
that it sees fit. So AsmParser can now do this:

void AsmParser::CheckForValidSection() {
  if (!ParsingInlineAsm && !getStreamer().getCurrentSection()) {
    TokError("expected section directive before assembly directive");
    Out.InitToTextSection();
  }
}

Which is much more reasonable.

llvm-svn: 172450
2013-01-14 19:04:57 +00:00
Eli Bendersky a7b905eeaa Move ParseMacroArgument to the MCAsmParser interfance.
Since it's used by extensions. One further step to fully decoupling
GenericAsmParser from an intimate knowledge of the internals of AsmParser,
pointing it to the MCASmParser interface instead (like all other parser
extensions do).

Since this change moves the MacroArgument type to the interface header, it's
renamed to be a bit more descriptive in a general context.

llvm-svn: 172449
2013-01-14 19:00:26 +00:00
Eli Bendersky c2f6f920b9 Encapsulate the MacroEnabled flag in AsmParser behind accessor methods.
The methods are also exposed via the MCAsmParser interface, which allows more
than one client to control them. Previously, GenericAsmParser was playing with
a member var in AsmParser directly (by virtue of being its friend).

llvm-svn: 172440
2013-01-14 18:08:41 +00:00
Eli Bendersky 03872a3a2e Stop hiding the interface-exposed EatToEndOfStatement (see r172276).
llvm-svn: 172277
2013-01-12 00:23:24 +00:00
Eli Bendersky 0cf0cb9247 Make ParseIdentifier a public method instead of private.
The MCAsmParser interface defines ParseIdentifier is public. There's no reason
whatsoever for AsmParser (which implements the MCAsmParser interface) to hide
this method.

This is all part of a bigger scheme. Several asm parsing "extensions" use the
main parser properly through the MCAsmParser interface. However,
GenericAsmParser has much more exclusive access and uses implementation details
from the concrete implementation - AsmParser, in which it is also declared as
a friend. This makes for overly coupled code, and even makes it hard to split
GenericAsmParser into a separate file. There's no reason why GenericAsmParser
shouldn't be able to access AsmParser through an abstract interface, as long
as it's actually registered as an extension.

llvm-svn: 172276
2013-01-12 00:05:00 +00:00
Eli Bendersky 9652272db9 Proof of concept moving of generic directive parsing from AsmParser to the
GenericAsmParser extension, where a lot of directives are already being parsed.
The end goal is having just a single place (and a single lookup table) for
all directive parsing.

llvm-svn: 172268
2013-01-11 22:55:28 +00:00
NAKAMURA Takumi 2abe564806 Revert r172153, "llvm/lib/MC/MCParser/AsmParser.cpp: [ms-inline-asm] Fix a couple of undefined behaviors. Operand->needAddressOf() is not initialized at !Operand->isReg()."
It has been redundant since r172157.

llvm-svn: 172166
2013-01-11 02:50:09 +00:00
NAKAMURA Takumi 84f349397c llvm/lib/MC/MCParser/AsmParser.cpp: [ms-inline-asm] Fix a couple of undefined behaviors. Operand->needAddressOf() is not initialized at !Operand->isReg().
llvm-svn: 172153
2013-01-11 00:37:35 +00:00
Eli Bendersky 4d21fa05f7 Rename enumerations s/VK/DK/ to conform to naming convention
llvm-svn: 172149
2013-01-10 23:40:56 +00:00
Eli Bendersky 930f73a0dd fix comments a bit
llvm-svn: 172146
2013-01-10 23:32:57 +00:00
Eli Bendersky ec9e3cff22 Remove a couple of if-else chains in parsing directives, replacing them by a
switch. Committed with Jim's and Chris's approval.

llvm-svn: 172136
2013-01-10 22:44:57 +00:00
Chad Rosier a4bc9437a2 [ms-inline asm] Add support for calling functions from inline assembly.
Part of rdar://12991541

llvm-svn: 172121
2013-01-10 22:10:27 +00:00
Eric Christopher e3ab3d0e2c These functions have default arguments of 0 for the last arg. Use
them.

llvm-svn: 171933
2013-01-09 01:57:54 +00:00
Eli Bendersky 802b62871e Add the align_to_end option to .bundle_lock in the MC implementation of aligned
bundling. The document describing this feature and the implementation has also
been updated:

https://sites.google.com/a/chromium.org/dev/nativeclient/pnacl/aligned-bundling-support-in-llvm

llvm-svn: 171797
2013-01-07 21:51:08 +00:00
Chad Rosier f3feab311f [ms-inline asm] Make sure the NullStreamParser doesn't try to emit labels when
parsing MS-style inline assembly.

llvm-svn: 171784
2013-01-07 20:34:12 +00:00
Jordan Rose e8f1eaea8a Change SMRange to be half-open (exclusive end) instead of closed (inclusive)
This is necessary not only for representing empty ranges, but for handling
multibyte characters in the input. (If the end pointer in a range refers to
a multibyte character, should it point to the beginning or the end of the
character in a char array?) Some of the code in the asm parsers was already
assuming this anyway.

llvm-svn: 171765
2013-01-07 19:00:49 +00:00
Eli Bendersky f483ff9204 Aligned bundling support. Following the discussion here:
http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-December/056754.html

The proposal and implementation are fully documented here:
https://sites.google.com/a/chromium.org/dev/nativeclient/pnacl/aligned-bundling-support-in-llvm

Tests will follow shortly.

llvm-svn: 170718
2012-12-20 19:05:53 +00:00
Eric Christopher 906da23229 Add support for passing -main-file-name all the way through to
the assembler.

Part of PR14624

llvm-svn: 170390
2012-12-18 00:31:01 +00:00
Eric Christopher a7c3273e85 Cleanup formatting and whitespace.
llvm-svn: 170389
2012-12-18 00:30:54 +00:00
Eli Bendersky d371eb3060 fix indentation
llvm-svn: 170381
2012-12-17 22:50:56 +00:00
Tim Northover 5edabc131a Teach MachO which sections contain code
llvm-svn: 170349
2012-12-17 17:59:32 +00:00
Chad Rosier 149e8e042f [ms-inline asm] Make sure we fail gracefully on parse errors. Parse errors
should only occur on invalid input.  Instruction matching errors aren't
unexpected, so we can't rely on the AsmParsers HadError variable directly.
rdar://12840278

llvm-svn: 170037
2012-12-12 22:45:52 +00:00
Chandler Carruth ed0881b2a6 Use the new script to sort the includes of every file under lib.
Sooooo many of these had incorrect or strange main module includes.
I have manually inspected all of these, and fixed the main module
include to be the nearest plausible thing I could find. If you own or
care about any of these source files, I encourage you to take some time
and check that these edits were sensible. I can't have broken anything
(I strictly added headers, and reordered them, never removed), but they
may not be the headers you'd really like to identify as containing the
API being implemented.

Many forward declarations and missing includes were added to a header
files to allow them to parse cleanly when included first. The main
module rule does in fact have its merits. =]

llvm-svn: 169131
2012-12-03 16:50:05 +00:00
Daniel Dunbar 40f1d85807 MC/AsmParser: Avoid unnecessary use of SourceMgr::FindBufferForLoc()
- Each macro instantiation introduces a new buffer, and FindBufferForLoc() is
   linear, so previously macro instantiation could be N^2 for some pathological
   inputs.

llvm-svn: 169073
2012-12-01 01:38:48 +00:00
Rafael Espindola cdb9a538d6 Add support for .cfi_register now that it is easy to extent the representation
to support it. Original patch with the parsing and plumbing by the PaX team and
Roman Divacky. I added the bits in MCDwarf.cpp and the test.

llvm-svn: 168565
2012-11-25 15:14:49 +00:00
Rafael Espindola 9bb247813a Implement .cfi_undefined. Based on a patch from PaX team, updated by
Roman Divacky. I just added the testcase.

llvm-svn: 168520
2012-11-23 16:59:41 +00:00
Kevin Enderby 27121c1543 Fix for PR14264 cause by commit r167237 which did not take into account a
possible buffer change with a .macro directive.

rdar://12637628

llvm-svn: 167408
2012-11-05 21:55:41 +00:00
Kevin Enderby 4eaf8ef5cb Add support for generating dwarf debugging info with assembly files
run through the 'C' preprocessor.  That is pick up the file name
and line numbers from the cpp hash file line comments for the
dwarf file and line numbers tables.

rdar://9275556

llvm-svn: 167237
2012-11-01 17:31:35 +00:00
Chad Rosier 11c42f2d2c [ms-inline asm] Add support for the TYPE operator.
Part of rdar://12576868

llvm-svn: 166790
2012-10-26 18:04:20 +00:00
Chad Rosier e2f03771c4 [ms-inline asm] Have the target AsmParser create the asmrewrite for the offsetof
operator.

llvm-svn: 166779
2012-10-26 16:09:20 +00:00
Chad Rosier f0e8720054 [ms-inline asm] Add support for creating AsmRewrites in the target specific
AsmParser logic.  To be used/tested in a subsequent commit.

llvm-svn: 166714
2012-10-25 20:41:34 +00:00
Chad Rosier 91c8266200 [ms-inline asm] Create a register operand, rather than a memory operand when we
see the offsetof operator.  Previously, we were matching something like MOVrm
in the front-end and later matching MOVrr in the back-end.  This change makes
things more consistent.  It also fixes cases where we can't match against a 
memory operand as the source (test cases coming).
Part of rdar://12470317

llvm-svn: 166592
2012-10-24 17:22:29 +00:00
Chad Rosier 37e755cee2 [ms-inline asm] Add an implementation of the offset operator. This is a follow
on patch to r166433.
rdar://12470317

llvm-svn: 166488
2012-10-23 17:43:43 +00:00
Eli Friedman 0f4871d487 [ms-inline-asm] Implement _emit directive (which is roughly equivalent to .byte).
<rdar://problem/12470345>.

llvm-svn: 166451
2012-10-22 23:58:19 +00:00
Eli Friedman 15e9b33678 [ms-inline asm] Don't rewrite out parts of an inline-asm skipped by .if 0 and friends.
It's unnecessary and makes the generated assembly less faithful to the original source.

llvm-svn: 166440
2012-10-22 20:50:25 +00:00
Chad Rosier 3017a06c8f [ms-inline asm] Rename AsmOpRewrite to just AsmRewrite to be more generic. No functional change intended.
llvm-svn: 166360
2012-10-20 01:02:45 +00:00
Chad Rosier eda70b3451 [ms-inline asm] If the state of the parser is ignore, then don't parse the
inline assembly.  Also make sure the remove the ignored statements from the IR.

llvm-svn: 166357
2012-10-20 00:47:08 +00:00
Chad Rosier ce09f6b9ef [ms-inline asm] Continue parsing even when we're in an ignore block.
llvm-svn: 166352
2012-10-19 23:15:00 +00:00
Chad Rosier f1f6a72901 [ms-inline asm] Reset the opcode prior to parsing a statement.
llvm-svn: 166349
2012-10-19 22:57:33 +00:00
Chad Rosier 0f48c55e70 [ms-inline asm] Have the TargetParser callback to Sema to determine the size of
a memory operand.  Retain this information and then add the sizing directives
to the IR.  This allows the backend to do proper instruction selection.

llvm-svn: 166316
2012-10-19 20:57:14 +00:00
Chad Rosier 75f0b2f2bd [ms-inline asm] Add the isParsingInlineAsm() function to the MCAsmTargetParser.
llvm-svn: 166292
2012-10-19 17:57:49 +00:00
Nick Lewycky ac612277cb Pacify -Wnon-virtual-dtor.
llvm-svn: 166270
2012-10-19 07:00:09 +00:00
Chad Rosier d48d078487 [ms-inline asm] Add a size argument to the LookupInlineAsmIdentifier() callback,
which will be used by the asm matcher in the near future.

llvm-svn: 166222
2012-10-18 20:27:15 +00:00
Chad Rosier f641baa030 [ms-inline asm] Have the LookupInlineAsmIdentifier() callback function return a
*NamedDecl.  In turn, build the expressions after we're finished parsing the
asm.  This avoids a crasher if the lookup fails.

llvm-svn: 166212
2012-10-18 19:39:30 +00:00
Chad Rosier 8bce664144 [ms-inline asm] Move most of the AsmParsing logic in clang back into the MC
layer.  Add the ParseMSInlineAsm() function, which is the new interface to 
clang.  Also expose the new MCAsmParserSemaCallback interface, which is used
by the back-end to do name lookup in Sema.  Finally, remove the now defunct
APIs introduced in r165946.

llvm-svn: 166183
2012-10-18 15:49:34 +00:00
Chad Rosier e4ad2a0b96 [ms-inline asm] Add the helper function, isParseringInlineAsm(). To be used in a future commit.
llvm-svn: 166054
2012-10-16 20:16:20 +00:00
Chad Rosier f3bc599680 [ms-inline asm] If we parsed a statement and the opcode is valid, then it's an instruction.
llvm-svn: 165955
2012-10-15 19:08:18 +00:00
Chad Rosier 0d6f149e62 [ms-inline asm] Add a few new APIs to the AsmParser class in support of MS-Style
inline assembly.  For the time being, these will be called directly by clang.
However, in the near future I expect these to be sunk back into the MC layer
and more basic APIs (e.g., getClobbers(), getConstraints(), etc.) will be called
by clang.

llvm-svn: 165946
2012-10-15 17:19:13 +00:00
Chad Rosier 4996355592 [ms-inline asm] Remove the MatchInstruction() function. Previously, this was
the interface between the front-end and the MC layer when parsing inline
assembly.  Unfortunately, this is too deep into the parsing stack. Specifically,
we're unable to handle target-independent assembly (i.e., assembly directives,
labels, etc.).  Note the MatchAndEmitInstruction() isn't the correct
abstraction either.  I'll be exposing target-independent hooks shortly, so this
is really just a cleanup.

llvm-svn: 165858
2012-10-13 00:26:04 +00:00
Chad Rosier 126d0b8c4d Whitespace.
llvm-svn: 165540
2012-10-09 20:15:02 +00:00
Preston Gurd 055006475e Add support for macro parameters/arguments delimited by spaces,
to improve compatibility with GNU as.

Based on a patch by PaX Team.

Fixed assertion failures on non-Darwin and added additional test cases.

llvm-svn: 164248
2012-09-19 20:36:12 +00:00
Preston Gurd 242ed3158a Support default parameters/arguments for assembler macros.
This patch is based on the one by PaX Team.

Patch by Andy Zhang!

llvm-svn: 164246
2012-09-19 20:29:04 +00:00
Preston Gurd eb3ebf16ab Enhance unmatched '.endr' directive error message in assembler.
The directive can be matched with directives other than '.rept'

Patch by Andy Zhang!

llvm-svn: 164245
2012-09-19 20:23:43 +00:00
Craig Topper 2e6644c260 Use LLVM_DELETED_FUNCTION in place of 'DO NOT IMPLEMENT' comments.
llvm-svn: 163970
2012-09-15 16:23:52 +00:00
Dmitri Gribenko 5485acd440 Fix Doxygen issues:
* wrap code blocks in \code ... \endcode;
* refer to parameter names in paragraphs correctly (\arg is not what most
  people want -- it starts a new paragraph);
* use \param instead of \arg to document parameters in order to be consistent
  with the rest of the codebase.

llvm-svn: 163902
2012-09-14 14:57:36 +00:00
Jim Grosbach b7b750d480 Assembler: Darwin variables defined via .set are no-dead-strip.
For gas compatibility.

rdar://12219394

llvm-svn: 163854
2012-09-13 23:11:31 +00:00
Manman Ren 49d684e1e2 Release build: guard dump functions with
"#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)"

No functional change. Update r163344.

llvm-svn: 163679
2012-09-12 05:06:18 +00:00
Dmitri Gribenko ca1e27be0d Remove redundant semicolons which are null statements.
llvm-svn: 163547
2012-09-10 21:26:47 +00:00
Benjamin Kramer 68b9f0583f Fix alignment of .comm and .lcomm on mingw32.
For some reason .lcomm uses byte alignment and .comm log2 alignment so we can't
use the same setting for both. Fix this by reintroducing the LCOMM enum.
I verified this against mingw's gcc.

llvm-svn: 163420
2012-09-07 21:08:01 +00:00
Benjamin Kramer 47f9ec92cb MC: Overhaul handling of .lcomm
- Darwin lied about not supporting .lcomm and turned it into zerofill in the
  asm parser. Push the zerofill-conversion down into macho-specific code.
- This makes the tri-state LCOMMType enum superfluous, there are no targets
  without .lcomm.
- Do proper error reporting when trying to use .lcomm with alignment on a target
  that doesn't support it.
- .comm and .lcomm alignment was parsed in bytes on COFF, should be power of 2.
- Fixes PR13755 (.lcomm crashes on ELF).

llvm-svn: 163395
2012-09-07 17:25:13 +00:00
Manman Ren c3366ccecb Release build: guard dump functions with "ifndef NDEBUG"
No functional change.

llvm-svn: 163344
2012-09-06 19:55:56 +00:00
Craig Topper 5f96ca51b6 Add virtual keywords for methods that override the base class.
llvm-svn: 162826
2012-08-29 05:48:09 +00:00
Rafael Espindola 2c06448360 Fix macros arguments with an underscore, dot or dollar in them. This is based
on a patch by Andy/PaX. I added the support for dot and dollar.

llvm-svn: 162298
2012-08-21 18:29:30 +00:00
Rafael Espindola af6da83a2c Make the wording in of the "expected identifier" error in the .macro directive
consistent with the other "expected identifier" errors.
Extracted from the Andy/PaX patch. I added the test.

llvm-svn: 162291
2012-08-21 17:12:05 +00:00
Rafael Espindola d2dc2a7af3 Use typedefs. Fix indentation. Extracted from the Andy/PaX patch.
llvm-svn: 162283
2012-08-21 16:06:48 +00:00
Rafael Espindola 5535863043 Remove unused variable. Extracted from the Andy/PaX patch.
llvm-svn: 162282
2012-08-21 16:01:14 +00:00
Rafael Espindola 3e5eb4263a Fix typo. Extracted from the Andy/PaX patch.
llvm-svn: 162281
2012-08-21 15:55:04 +00:00
Rafael Espindola cb7eadfe7e Typedefs and indentation fixes from the Andy Zhang/PAX macro argument patch.
Committing it first as it makes the "real" patch a lot easier to read.

llvm-svn: 161491
2012-08-08 14:51:03 +00:00
Bill Wendling ce4fe41d21 Add `.pushsection', `.popsection', and `.previous' directives to Darwin ASM.
There are situations where inline ASM may want to change the section -- for
instance, to create a variable in the .data section. However, it cannot do this
without (potentially) restoring to the wrong section. E.g.:

  asm volatile (".section __DATA, __data\n\t"
                ".globl _fnord\n\t"
                "_fnord: .quad 1f\n\t"
                ".text\n\t"
                "1:" :::);

This may be wrong if this is inlined into a function that has a "section"
attribute. The user should use `.pushsection' and `.popsection' here instead.

The addition of `.previous' is added for completeness.
<rdar://problem/12048387>

llvm-svn: 161477
2012-08-08 06:30:30 +00:00
Jim Grosbach 20666162e9 Keep empty assembly macro argument values in the middle of the list.
Empty macro arguments at the end of the list should be as-if not specified at
all, but those in the middle of the list need to be kept so as not to screw
up the positional numbering. E.g.:
.macro foo
foo_-bash___:
  nop
.endm

foo 1, 2, 3, 4
foo 1, , 3, 4

Should create two labels, "foo_1_2_3_4" and "foo_1__3_4".

rdar://11948769

llvm-svn: 161002
2012-07-30 22:44:17 +00:00
Sylvestre Ledru 35521e2310 Fix a typo (the the => the)
llvm-svn: 160621
2012-07-23 08:51:15 +00:00
Bill Wendling d163405df8 Remove tabs.
llvm-svn: 160475
2012-07-19 00:04:14 +00:00
Akira Hatanaka d359075e43 Enable target dependent directive parsing to hook before standard parser in
AsmParser::ParseStatement.

Patch by Vladimir Medic.

llvm-svn: 159768
2012-07-05 19:09:33 +00:00
Rafael Espindola f70bea93e2 Implement irpc. Extracted from a patch by the PaX team. I just added the test.
llvm-svn: 158604
2012-06-16 18:03:25 +00:00
Rafael Espindola 768b41c17a Factor macro argument parsing into helper methods and add support for .irp.
Patch extracted from a larger one by the PaX team. I added the testcases
and tightened error handling a bit.

llvm-svn: 158523
2012-06-15 14:02:34 +00:00
Rafael Espindola 34b9c511c1 Represent .rept as an anonymous macro. This removes the need for the ActiveRept
vector. No functionality change.
Extracted from a patch by the PaX Team.

llvm-svn: 157909
2012-06-03 23:57:14 +00:00
Rafael Espindola dd17c237a8 Add a typedef to simplify the code a bit. Not functionality change.
Part of a patch by the PaX Team.

llvm-svn: 157908
2012-06-03 22:41:23 +00:00
Benjamin Kramer bde9176663 Fix typos found by http://github.com/lyda/misspell-check
llvm-svn: 157885
2012-06-02 10:20:22 +00:00
Jim Grosbach 4b63d2ae1d Refactor data-in-code annotations.
Use a dedicated MachO load command to annotate data-in-code regions.
This is the same format the linker produces for final executable images,
allowing consistency of representation and use of introspection tools
for both object and executable files.

Data-in-code regions are annotated via ".data_region"/".end_data_region"
directive pairs, with an optional region type.

data_region_directive := ".data_region" { region_type }
region_type := "jt8" | "jt16" | "jt32" | "jta32"
end_data_region_directive := ".end_data_region"

The previous handling of ARM-style "$d.*" labels was broken and has
been removed. Specifically, it didn't handle ARM vs. Thumb mode when
marking the end of the section.

rdar://11459456

llvm-svn: 157062
2012-05-18 19:12:01 +00:00
Benjamin Kramer c7eda3ee9c Fix spacing after if.
llvm-svn: 156716
2012-05-12 16:52:21 +00:00
Rafael Espindola 47b7dac220 Add support for the .rept directive. Patch by Vladmir Sorokin. I added support
for nesting.

llvm-svn: 156714
2012-05-12 16:31:10 +00:00
Benjamin Kramer 6bee7f750d ELF: Add support for the asm .version directive.
llvm-svn: 156712
2012-05-12 14:30:47 +00:00
Benjamin Kramer 95d31bcba5 AsmParser: Add support for the .purgem directive.
Based on a patch by Team PaX.

llvm-svn: 156709
2012-05-12 11:21:46 +00:00
Benjamin Kramer 38de62f883 AsmParser: Give a nice error message for .code16gcc, which is currently unsupported.
Patch by Team PaX!

llvm-svn: 156708
2012-05-12 11:19:04 +00:00
Benjamin Kramer 66b8d4d28f AsmParser: ignore the .extern directive.
llvm-svn: 156707
2012-05-12 11:18:59 +00:00
Benjamin Kramer e297b9f506 AsmParser: Add support for .ifc and .ifnc directives.
Based on a patch from PaX Team.

llvm-svn: 156706
2012-05-12 11:18:51 +00:00
Benjamin Kramer 62c18b0881 AsmParser: Add support for .ifb and .ifnb directives.
Based on a patch from PaX Team.

llvm-svn: 156705
2012-05-12 11:18:42 +00:00
Jim Grosbach 758e0cc94a MC: Unknown assembler directives are now hard errors.
Previously, an unsupported/unknown assembler directive issued a warning.
That's generally unsafe, and inconsistent with the behaviour of pretty
much every system assembler. Now that the MC assemblers are mature
enough to be the default on multiple targets, it's reasonable to
issue errors for these.

For target or platform directives that need to stay warnings, we
should add explicit handlers for them in, e.g., ELFAsmParser.cpp,
DarwinAsmParser.cpp, et. al., and issue the warning there.

rdar://9246275

llvm-svn: 155926
2012-05-01 18:38:27 +00:00
Jim Grosbach a0c53f147a MC: Remove errant EatToEndOfStatement() in asm parser.
The caller is already responsible for eating any additional input on the
line. Putting an additional EatToEndOfStatement() in ParseStatement()
causes an entire extra statement to be consumed when treating warnings
as errors. For example, test/MC/macros.s will assert() because the
.endmacro directive is missed as a result.

rdar://11355843

llvm-svn: 155925
2012-05-01 18:38:24 +00:00
Jim Grosbach 1e1d68f1b9 MC assembly parser handling for trailing comma in macro instantiation.
A trailing comma means no argument at all (i.e., as if the comma were not
present), not an empty argument to the invokee.

rdar://11252521

llvm-svn: 154863
2012-04-16 21:18:49 +00:00
Craig Topper 1fcf5bcae1 Prune some includes
llvm-svn: 153502
2012-03-27 07:54:11 +00:00
Jim Grosbach 1283317db4 Assembler should accept redefinitions of unused variable symbols.
rdar://11027851

llvm-svn: 153137
2012-03-20 21:33:21 +00:00
Jim Grosbach 2c8e0ac85c MC asm parser macro argument count was wrong when empty.
evaluated to '1' when the argument list was empty (should be '0').

rdar://11057257

llvm-svn: 152967
2012-03-17 00:11:42 +00:00
Craig Topper a2886c21d9 Convert assert(0) to llvm_unreachable
llvm-svn: 149967
2012-02-07 05:05:23 +00:00
Devang Patel a173ee56fd Add assembler dialect attribute in asm parser which lets target specific asm parser change dialect on the fly.
llvm-svn: 149396
2012-01-31 18:14:05 +00:00
Benjamin Kramer 4efe5064c3 Silence GCC's -Wreturn-type warning.
llvm-svn: 149179
2012-01-28 15:28:41 +00:00
Rafael Espindola 004725876e Small improvement to the recursion detection logic from the previous commit.
llvm-svn: 149175
2012-01-28 06:22:14 +00:00
Rafael Espindola 72f5f170c6 Handle recursive variable definitions directly. This gives us better error
messages and allows us to fix PR11865.

llvm-svn: 149174
2012-01-28 05:57:00 +00:00
Jim Grosbach b591277c4a Better diagnostic for malformed .org assembly directive.
Provide source line number information.

llvm-svn: 149101
2012-01-27 00:37:08 +00:00
Rafael Espindola 3c47e37387 Add support for .cfi_signal_frame. Fixes pr11762.
llvm-svn: 148733
2012-01-23 21:51:52 +00:00
David Blaikie 46a9f016c5 More dead code removal (using -Wunreachable-code)
llvm-svn: 148578
2012-01-20 21:51:11 +00:00
Kevin Enderby 6223cf72e6 The error check for using -g with a .s file already containing dwarf .file
directives was in the wrong place and getting triggered incorectly with a
cpp .file directive.  This change fixes that and adds a test case.

llvm-svn: 147951
2012-01-11 18:04:47 +00:00
Devang Patel 227b6279b6 Let asm parser query asm syntax dialect.
llvm-svn: 147880
2012-01-10 21:49:42 +00:00
Kevin Enderby f7d77069ca This is the matching change for the data structure name changes for the
functional change in r147860 to use DW_TAG_label's instead TAG_subprogram's.
This only changes names and updates comments.  No functional change.

llvm-svn: 147877
2012-01-10 21:12:34 +00:00
Rafael Espindola 4ea99816ef Implement cfi_restore. Patch by Brian Anderson!
llvm-svn: 147356
2011-12-29 21:43:03 +00:00
Rafael Espindola ef4aa35164 Implement .cfi_escape. Patch by Brian Anderson!
llvm-svn: 147352
2011-12-29 20:24:47 +00:00
Rafael Espindola d3df3d3527 Add back the MC bits of 126425. Original patch by Nathan Jeffords. I added the
asm parsing and testcase.

llvm-svn: 146801
2011-12-17 01:14:52 +00:00
Kevin Enderby dc785db0c3 Another improvement to the implementation of .incbin directive by avoiding a
buffer copy.  Suggestion by Chris Lattner!

llvm-svn: 146614
2011-12-15 00:00:27 +00:00
Kevin Enderby ad41ab5015 Improve the implementation of .incbin directive by replacing a loop by using
getStreamer().EmitBytes.  Suggestion by Benjamin Kramer!

llvm-svn: 146599
2011-12-14 22:34:45 +00:00
Kevin Enderby 109f25c966 Add the .incbin directive which takes the binary data from a file and emits
it to the streamer.  rdar://10383898

llvm-svn: 146592
2011-12-14 21:47:48 +00:00
Daniel Dunbar 27a7489a03 LLVMBuild: Remove trailing newline, which irked me.
llvm-svn: 146409
2011-12-12 19:48:00 +00:00
Roman Divacky 735cb8bcdc Add support for gnu_indirect_function.
llvm-svn: 146377
2011-12-12 17:34:04 +00:00
Kevin Enderby e7739d484f The second part of support for generating dwarf for assembly source files. This
generates the dwarf Compile Unit DIE and a dwarf subprogram DIE for each
non-temporary label.

The next part will be to get the clang driver to enable this when assembling
a .s file.  rdar://9275556

llvm-svn: 146262
2011-12-09 18:09:40 +00:00
Daniel Dunbar 539d0a8a09 build/CMake: Finish removal of add_llvm_library_dependencies.
llvm-svn: 145420
2011-11-29 19:25:30 +00:00
Daniel Dunbar bf9bba47a1 build: Add initial cut at LLVMBuild.txt files.
llvm-svn: 143634
2011-11-03 18:53:17 +00:00
Kevin Enderby 60d8516857 Replace tabs I added in this new line of code with spaces.
Thanks to Nick for spotting this!

llvm-svn: 143556
2011-11-02 17:56:38 +00:00
Kevin Enderby 6469fc275a First part of support for generating dwarf for assembly source files with the
-g flag.  In this part we generate the .file for the source being assembled and
the .loc's for the assembled instructions.

The next part will be to generate the dwarf Compile Unit DIE and a dwarf
subprogram DIE for each non-temporary label.

Once the next part is done test cases will be added.  rdar://9275556

llvm-svn: 143509
2011-11-01 22:27:22 +00:00
Rafael Espindola e0d0908356 Fix parsing of a line with only a # in it.
llvm-svn: 142537
2011-10-19 18:48:52 +00:00
Nick Lewycky 40f8f2ff24 Add support for a new extension to the .file directive:
.file filenumber "directory" "filename"

This removes one join+split of the directory+filename in MC internals. Because
bitcode files have independent fields for directory and filenames in debug info,
this patch may change the .o files written by existing .bc files.

llvm-svn: 142300
2011-10-17 23:05:28 +00:00
Benjamin Kramer 1930b003fe Add AsmToken::getEndLoc and use it to add ranges to x86 asm register parsing.
<stdin>:1:12: error: register %rax is only available in 64-bit mode
   incl    %rax
           ^~~~

llvm-svn: 142137
2011-10-16 12:10:27 +00:00
Benjamin Kramer 47f5e30e78 PR11143: Save the old diagnostic handler and call it when munging diagnostics for #line directives.
This reenables proper inline asm diagnostics in clang

llvm-svn: 142132
2011-10-16 10:48:29 +00:00
Chris Lattner 7284526aff remove the dead 'ShowLine' argument from SMDiagnostic.
llvm-svn: 142108
2011-10-16 05:47:55 +00:00
Chris Lattner 03b80a4027 Make SMDiagnostic a little more sane. Instead of passing around note/warning/error as a
string, pass it around as an enum.

llvm-svn: 142107
2011-10-16 05:43:57 +00:00
Chris Lattner a3a0681083 Enhance llvm::SourceMgr to support diagnostic ranges, the same way clang does. Enhance
the X86 asmparser to produce ranges in the one case that was annoying me, for example:

test.s:10:15: error: invalid operand for instruction
movl 0(%rax), 0(%edx)
              ^~~~~~~

It should be straight-forward to enhance filecheck, tblgen, and/or the .ll parser to use 
ranges where appropriate if someone is interested.

llvm-svn: 142106
2011-10-16 04:47:35 +00:00
Kevin Enderby e7c0c499b8 Finish supporting cpp #file/line comments in assembler for error messages. So
for cpp pre-processed assembly we give correct filename and line numbers when
reporting errors in assembly files when using clang and -integrated-as on .s
files. rdar://8998895

llvm-svn: 141814
2011-10-12 21:38:39 +00:00
Jim Grosbach ebdf32f907 Assmebler symbol attribute directives don't work on temporary symbols.
Assembler private local symbols aren't legal targets of symbol attributes,
so issue a diagnostic for them.

Based on patch by Stepan Dyatkovskiy.

llvm-svn: 139807
2011-09-15 17:56:49 +00:00
Jim Grosbach a9aa3c18e3 Handle missing newline at EOF more gracefully in MC AsmLexer.
If we see an EOF w/o a preceding end-of-line, return an EndOfStatement
token before returning the Eof token.

Based on patch by Stepan Dyatkovskiy.

llvm-svn: 139798
2011-09-15 16:52:06 +00:00
Jim Grosbach 1daf07338c Move state var to private class member.
llvm-svn: 139697
2011-09-14 16:37:04 +00:00
Kevin Enderby 7255361320 First step in supporting #line directives in assembler. This step parses the
#line directives with the needed support in the lexer.  Next will be to build
a simple file/line# table mapping source SMLoc's for later use by diagnostics.
And the last step will be to get the diagnostics to use the mapping for file
and line numbers.

llvm-svn: 139669
2011-09-13 23:45:18 +00:00
Jim Grosbach bd16424f91 Fix AsmParser binary precedence for shift operators.
rdar://9976729

llvm-svn: 138208
2011-08-20 16:24:13 +00:00
Jim Grosbach 345768c9ff Remove unused Target argument from AsmParser construction methods.
The argument is unused, and is a layering violation in any case.

llvm-svn: 137735
2011-08-16 18:33:49 +00:00
Chris Lattner e8baa38e79 allow \r's in .s files.
llvm-svn: 136908
2011-08-04 19:31:26 +00:00
Chandler Carruth 9d7feab3e0 Rewrite the CMake build to use explicit dependencies between libraries,
specified in the same file that the library itself is created. This is
more idiomatic for CMake builds, and also allows us to correctly specify
dependencies that are missed due to bugs in the GenLibDeps perl script,
or change from compiler to compiler. On Linux, this returns CMake to
a place where it can relably rebuild several targets of LLVM.

I have tried not to change the dependencies from the ones in the current
auto-generated file. The only places I've really diverged are in places
where I was seeing link failures, and added a dependency. The goal of
this patch is not to start changing the dependencies, merely to move
them into the correct location, and an explicit form that we can control
and change when necessary.

This also removes a serialization point in the build because we don't
have to scan all the libraries before we begin building various tools.
We no longer have a step of the build that regenerates a file inside the
source tree. A few other associated cleanups fall out of this.

This isn't really finished yet though. After talking to dgregor he urged
switching to a single CMake macro to construct libraries with both
sources and dependencies in the arguments. Migrating from the two macros
to that style will be a follow-up patch.

Also, llvm-config is still generated with GenLibDeps.pl, which means it
still has slightly buggy dependencies. The internal CMake
'llvm-config-like' macro uses the correct explicitly specified
dependencies however. A future patch will switch llvm-config generation
(when using CMake) to be based on these deps as well.

This may well break Windows. I'm getting a machine set up now to dig
into any failures there. If anyone can chime in with problems they see
or ideas of how to solve them for Windows, much appreciated.

llvm-svn: 136433
2011-07-29 00:14:25 +00:00
Evan Cheng 481ebb0133 Support .code32 and .code64 in X86 assembler.
llvm-svn: 136197
2011-07-27 00:38:12 +00:00
Evan Cheng 1142444565 Rename TargetAsmParser to MCTargetAsmParser and TargetAsmLexer to MCTargetAsmLexer; rename createAsmLexer to createMCAsmLexer and createAsmParser to createMCAsmParser.
llvm-svn: 136027
2011-07-26 00:24:13 +00:00
Jim Grosbach 38b1ed8ce2 Move some ELF directives into ELF asm parser.
The .local, .hidden, .internal, and .protected are not legal for all supported
file formats (in particular, they're invalid for MachO). Move the parsing for
them into the ELF assembly parser since that's the format they're for.
Similarly, .weak is used by COFF and ELF, but not MachO, so move the parsing
to the COFF and ELF asm parsers. Previously, using any of these directives
on Darwin would result in an assertion failure in the parser; now we get
a diagnostic as we should.

rdar://9827089

llvm-svn: 135921
2011-07-25 17:55:35 +00:00
Jim Grosbach 1a55fa61e2 Tidy up. 80 columns.
llvm-svn: 135917
2011-07-25 17:11:29 +00:00
Evan Cheng f2596bc62a Move TargetAsmParser.h TargetAsmBackend.h and TargetAsmLexer.h to MC where they belong.
llvm-svn: 135833
2011-07-23 00:45:41 +00:00
Evan Cheng bbf3b0de8b Goodbye TargetAsmInfo. This eliminate last bit of CodeGen and Target in llvm-mc.
There is still a bit more refactoring left to do in Targets. But we are now very
close to fixing all the layering issues in MC.

llvm-svn: 135611
2011-07-20 19:50:42 +00:00
Evan Cheng 76792992d6 Add MCObjectFileInfo and sink the MCSections initialization code from
TargetLoweringObjectFileImpl down to MCObjectFileInfo.

TargetAsmInfo is done to one last method. It's *almost* gone!

llvm-svn: 135569
2011-07-20 05:58:47 +00:00
Evan Cheng d60fa58ba1 Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down
to MCRegisterInfo. Also initialize the mapping at construction time.

This patch eliminate TargetRegisterInfo from TargetAsmInfo. It's another step
towards fixing the layering violation.

llvm-svn: 135424
2011-07-18 20:57:22 +00:00
Evan Cheng a83b37a9db Move some parts of TargetAsmInfo down to MCAsmInfo. This is not the greatest
solution but it is a small step towards removing the horror that is
TargetAsmInfo.

llvm-svn: 135237
2011-07-15 02:09:41 +00:00
Jim Grosbach 602aa90ab8 Update MCParsedAsmOperand debug methods.
Update the debug output interface for MCParsedAsmOperand to have a print()
method which takes an output stream argument, an << operator which invokes
the print method using the given stream, and a dump() method which prints
the operand to the dbgs() stream. This makes the interface more consistent
with the rest of LLVM, and more convenient to use at the debugger command
line.

llvm-svn: 135043
2011-07-13 15:34:57 +00:00
Evan Cheng 22e9d8f40e TargetAsmParser doesn't need reference to Target.
llvm-svn: 134721
2011-07-08 19:33:14 +00:00
Jim Grosbach 76346c3bf7 Asm parser range checking on .<size> <value> directives.
For example, ".byte 256" would previously assert() when emitting an object
file. Now it generates a diagnostic that the literal value is out of range.

rdar://9686950

llvm-svn: 134069
2011-06-29 16:05:14 +00:00
Hans Wennborg 3fefc65c1d MC: Allow .common as alias for .comm assembler directive. PR10116.
llvm-svn: 133349
2011-06-18 13:51:54 +00:00
Jim Grosbach c7e6b8fed5 Diagnostic for undefined assembler local symbols.
Re-apply 133010, with fixes for inline assembler.

Original commit message:
"When an assembler local symbol is used but not defined in a module, a
Darwin assembler wants to issue a diagnostic to that effect."

Added fix to only perform the check when finalizing, as otherwise we're not
done and undefined symbols may simply not have been encountered yet.

Passes "make check" and a self-host check on Darwin.

llvm-svn: 133071
2011-06-15 18:33:28 +00:00
Jim Grosbach ed1da49673 Revert 133010. Self-hosted buildbot unhappy.
Apparently llvm itself generates undefined assembler local labels, causing
self-hosting problems with this patch. Reverting until that's sorted out.

llvm-svn: 133013
2011-06-14 21:51:20 +00:00
Jim Grosbach 627e780902 Diagnostic for undefined assembler local symbols.
When an assembler local symbol is used but not defined in a module, a
Darwin assembler wants to issue a diagnostic to that effect.

rdar://9559714

llvm-svn: 133010
2011-06-14 21:13:25 +00:00
Rafael Espindola 1134ab23df Basic support for macros with explicit arguments.
We still don't handle

* default values
* :req
* :vararg
* \()

llvm-svn: 132656
2011-06-05 02:43:45 +00:00
Jim Grosbach dac0238ed2 .cfi directive register parsing flexibility.
Parsing a register name/number for .cfi directives can't assume that a
register name starts with a '%' token. Be more flexible and check for a
register number instead. Still unlikely to be perfect, but it allows us
to parse both plain identifiers as register names and integers as register
numbers, which is what we're wanting to support at this point.

llvm-svn: 132466
2011-06-02 17:14:04 +00:00
Joerg Sonnenberger af5f23ee07 Add new -d option to tblgen. It writes a make(1)-style dependency file.
llvm-svn: 132395
2011-06-01 13:10:15 +00:00
Charles Davis 2f6ecea19d Add tests for .seh_setframe and .seh_handlerdata parsing. Fix issues with
them.

I had to add a special SwitchSectionNoChange method to MCStreamer just for
.seh_handlerdata. If this isn't OK, please let me know, and I'll find some
other way to fix .seh_handlerdata streaming.

llvm-svn: 132084
2011-05-25 21:43:45 +00:00
Charles Davis 828b00c0e1 Add tests for .seh_savereg and .seh_savexmm parsing. Once again, fix the
buggy methods that parse these directives.

llvm-svn: 132045
2011-05-25 04:51:25 +00:00
Charles Davis b0c4f39173 Add a test for .seh_pushframe parsing. Fix the bug exposed by it (and another
one I found by inspection).

llvm-svn: 132037
2011-05-25 04:08:15 +00:00
Charles Davis fc1e7ce850 Add a test for the .seh_handler directive. Fix problems with the parsing
method exposed by the test. While we're at it, simplify the .seh_proc
parsing method.

llvm-svn: 132028
2011-05-25 01:33:42 +00:00
Charles Davis 7f6176c3f9 Implement the rest of the SEH directive-parsing methods in the COFFAsmParser.
Add a size alignment check to the .seh_stackalloc directive parser. Add a
more descriptive error message to the .seh_handler directive parser.

Add methods to the TargetAsmInfo struct in support of all this.

llvm-svn: 131992
2011-05-24 20:06:30 +00:00
Jim Grosbach bae9fee95f Propagate error correctly in the MC Asm parser for leading '$' expressions.
llvm-svn: 131918
2011-05-23 20:36:04 +00:00
Charles Davis d9eafdcfd5 Implement .seh_stackalloc and .seh_pushframe parsing.
I haven't implemented any of the ones that take registers yet. The problem is
that for x86-64 the streamer methods expect a native x86 register number (note:
%r8-%r15 want 8-15 instead of 0-7; same for %xmm8-%xmm15). I haven't figured
out exactly how I want to do that yet.

llvm-svn: 131899
2011-05-23 16:43:09 +00:00
Charles Davis c7250faeb1 Add methods to parse the SEH directives to the COFFAsmParser. Implement some
of them, particularly the ones that don't take arguments. Also implement
.seh_proc and .seh_handler.

llvm-svn: 131866
2011-05-22 21:12:15 +00:00
Joerg Sonnenberger 74ba2623ce Reapply 131644 including the missing header changes:
Introduce -fatal-assembler-warnings for the obvious purpose

llvm-svn: 131655
2011-05-19 18:00:13 +00:00
Eli Friedman 3e2f17499e Revert r131644; it's breaking the build.
llvm-svn: 131653
2011-05-19 17:48:09 +00:00
Joerg Sonnenberger 59b523169f Introduce -fatal-assembler-warnings for the obvious purpose
llvm-svn: 131644
2011-05-19 17:27:01 +00:00
Rafael Espindola 74b101f3e3 Parsing and plumbing for .cfi_sections.
llvm-svn: 131117
2011-05-10 01:10:18 +00:00
Daniel Dunbar 1bf128eaeb MC/AsmParser: Generalize a check.
llvm-svn: 130515
2011-04-29 17:53:11 +00:00
Devang Patel 17740e70d5 Reduce clutter in asm output. Do not emit source location as comment for each instruction.
llvm-svn: 129715
2011-04-18 20:26:49 +00:00
Rafael Espindola 539d96f01d Be consistent about being virtual and returning void in the cfi methods.
Implement the ones that were missing in the asm streamer.

llvm-svn: 129413
2011-04-12 23:59:07 +00:00
Rafael Espindola fd794affe5 Remove LastOffset from the asm parser.
llvm-svn: 129378
2011-04-12 18:53:30 +00:00
Rafael Espindola 1ec0f46169 Fix the case of a .cfi_rel_offset before any .cfi_def_cfa_offset.
llvm-svn: 129362
2011-04-12 16:12:03 +00:00
Rafael Espindola 2e1c9d2188 Implement .cfi_same_value.
llvm-svn: 129361
2011-04-12 15:31:05 +00:00
Eric Christopher ffc0e1f6e6 Match case for invalid constant error messages and add a new
test for invalid hexadecimals.

llvm-svn: 129326
2011-04-12 00:18:03 +00:00
Eric Christopher 104af0619e To avoid printing out multiple error messages for cases like:
.long 80+08

go ahead and assume that if we've got an Error token that we handled it
already. Otherwise if it's a token we can't handle then go ahead and
return the default error.

llvm-svn: 129322
2011-04-12 00:03:13 +00:00
Eric Christopher 64749f2a89 Lex, and then fail on invalid constants.
Testcase forthcoming.

rdar://8490596

llvm-svn: 129309
2011-04-11 22:24:56 +00:00
Rafael Espindola 82065cb6cf Implement cfi_rel_offset
llvm-svn: 129306
2011-04-11 21:49:50 +00:00
Rafael Espindola ffd2e5163b implement .cfi_adjust_cfa_offset.
llvm-svn: 129296
2011-04-11 20:29:16 +00:00
Rafael Espindola 88bc341061 Add support for .skip.
Patch by Roman Divacky.
Fixes PR9361.

llvm-svn: 129106
2011-04-07 20:26:23 +00:00
Kevin Enderby 5bbe957155 Added support symbolic floating point constants in the MC assembler for Infinity
and Nans with the same strings as GAS supports.  rdar://8673024

llvm-svn: 128488
2011-03-29 21:11:52 +00:00
Daniel Dunbar 6f4c9425eb MC: Improve some diagnostics on uses of '.' pseudo-symbol.
llvm-svn: 128289
2011-03-25 17:47:17 +00:00
Daniel Dunbar 3f56104be1 Tidyness.
llvm-svn: 128288
2011-03-25 17:47:14 +00:00
Jim Grosbach a3df87fb01 Clean up assembly statement separator support.
The MC asm lexer wasn't honoring a non-default (anything but ';') statement
separator. Fix that, and generalize a bit to support multi-character
statement separators.

llvm-svn: 128227
2011-03-24 18:46:34 +00:00
Stuart Hastings 12d5312622 Reapply 127939 since Daniel fixed the breakage. <rdar://problem/9012638>
llvm-svn: 127944
2011-03-19 02:42:31 +00:00
Stuart Hastings 08b4daa191 Revert 127939. <rdar://problem/9012638>
llvm-svn: 127943
2011-03-19 02:33:56 +00:00
Stuart Hastings 83d4a28d1f Revise r126127 to address Daniel's comments. <rdar://problem/9012638>
llvm-svn: 127939
2011-03-19 01:32:01 +00:00
Daniel Dunbar f1d62cfc8f MC/Mach-O: Fix regression introduced in r126127, this assignment shouldn't have
been removed.

llvm-svn: 127812
2011-03-17 16:25:24 +00:00
Jim Grosbach 14be61aeee Darwin 'as' silently ignores the '.ident' directive.
llvm-svn: 127258
2011-03-08 19:17:19 +00:00
Joerg Sonnenberger afb36fad99 Restore r125595 (reverted in r126336) with modifications:
Introduce a variable in the AsmParserExtension whether [] is valid in an
expression. If it is true, parse them like (). Enable this for ELF only.

llvm-svn: 126443
2011-02-24 21:59:22 +00:00
Jim Grosbach 0c03a3a146 Revert r125595, which is an X86-only undocumented assembly syntax extension
enabled for all targets. Non-X86 targets should not have this behavior
enabled by default.

Joerg, if you would like to resubmit with the behavior conditionalized to be
X86-ELF only, that's fine.

llvm-svn: 126336
2011-02-23 21:26:51 +00:00
Joerg Sonnenberger 4f864d3111 Bug#9172: Don't use static in file scope, use an attribute on the
parser.

llvm-svn: 126225
2011-02-22 16:53:11 +00:00
Rafael Espindola 58ac6e1677 Add support for pushsection and popsection. Patch by Joerg Sonnenberger.
llvm-svn: 125629
2011-02-16 01:08:29 +00:00
Roman Divacky 4e0f4957bc Add support for parsing [expr].
This is submitted by Joerg Sonnenberger and fixes his PR8685.

llvm-svn: 125595
2011-02-15 20:43:39 +00:00
Jim Grosbach 01af6c4641 More whitespace cleanup...
llvm-svn: 125388
2011-02-11 19:05:56 +00:00
Benjamin Kramer 7b7caf51e9 Support for .ifdef / .ifndef in the assembler parser. Patch by Joerg Sonnenberger.
llvm-svn: 125120
2011-02-08 22:29:56 +00:00
Bob Wilson 813bdf6e58 Do not sign extend floating-point values in the asm parser.
llvm-svn: 124831
2011-02-03 23:17:47 +00:00
Roman Divacky 9a58919c8e Enumerate .code16/32/64 instead of checking .code prefix. This
unbreaks some ARM tests.

llvm-svn: 124608
2011-01-31 21:19:43 +00:00
Roman Divacky bd59dff739 Error on all .code* directives instead of just .code16 as they
all lead to a silent miscompilation of code.

llvm-svn: 124603
2011-01-31 20:56:49 +00:00
Roman Divacky cd9ae95ae7 Error on .code16 instead of producing wrong (32bit) code.
llvm-svn: 124498
2011-01-28 19:29:48 +00:00
Roman Divacky 7e9e290952 Add support for parsing .float
llvm-svn: 124485
2011-01-28 14:20:32 +00:00
Nico Weber 4ada0d9164 PR8951: Support for .equiv in integrated assembler, patch by Jörg Sonnenberger!
llvm-svn: 124467
2011-01-28 03:04:41 +00:00
Roman Divacky ed5efb4053 Add support for specifying register name in cfi-register/offset/def
as well as register number.

llvm-svn: 124379
2011-01-27 17:16:37 +00:00
Bill Wendling cdbf17b179 Add support for parsing a Real value. It stores the Real value as its binary
encoding. It's up to the individual back-ends to convert it to their preferred
representation when printing.

llvm-svn: 124229
2011-01-25 21:26:41 +00:00
Rafael Espindola 689939e648 Handle strings in section names the same way as gas:
* If the name is a single string, we remove the quotes
* If the name starts without a quote, we include any quotes in the name

llvm-svn: 124127
2011-01-24 18:02:54 +00:00
Rafael Espindola 4b7b7fba38 Delay the creation of eh_frame so that the user can change the defaults.
Add support for SHT_X86_64_UNWIND.

llvm-svn: 124059
2011-01-23 05:43:40 +00:00
Rafael Espindola 0e7e34e476 Remove more duplicated code.
llvm-svn: 124056
2011-01-23 04:43:11 +00:00
Rafael Espindola aea4958ea6 Remove duplicated code.
llvm-svn: 124054
2011-01-23 04:28:49 +00:00
Jim Grosbach 493c0fbde8 Make sure to propogate the error code when we fail to parse a modifier.
llvm-svn: 123857
2011-01-19 23:06:07 +00:00
Rafael Espindola 46a5b05207 Correctly encode pcrel|indirect.
llvm-svn: 122624
2010-12-29 04:31:26 +00:00
Rafael Espindola 290d71671e Implement cfi_def_cfa. Also don't convert to dwarf reg numbers twice. Looks
like 6 is a fixed point of that and so the previous tests were OK :-)

llvm-svn: 122614
2010-12-29 01:42:56 +00:00
Rafael Espindola 85d91982ca Implement .cfi_remember_state and .cfi_restore_state.
llvm-svn: 122602
2010-12-28 18:36:23 +00:00
Rafael Espindola 1de2dd0e5e Add support for .cfi_lsda.
llvm-svn: 122584
2010-12-27 15:56:22 +00:00
Rafael Espindola 2ac8355ecd Add support for the same encodings of the personality function that gnu as
supports.

llvm-svn: 122577
2010-12-27 00:36:05 +00:00
Rafael Espindola 9ae2d05d45 Add support for @note. Patch by Jörg Sonnenberger.
llvm-svn: 122568
2010-12-26 21:30:59 +00:00
Rafael Espindola 9141b611ad Add basic support for .cfi_personality.
llvm-svn: 122566
2010-12-26 20:20:31 +00:00
Chris Lattner 03a102bff3 Generalize a previous change, fixing PR8855 - an valid large immediate
rejected by the mc assembler.

llvm-svn: 122557
2010-12-25 21:36:35 +00:00
Kevin Enderby fa3c6f148c In llvm-mc parse a Hash token as a full line comment. Allows handling of
preprocessed .s files and matches darwin gas.  rdar://8798690
Also fix a comment on the next line of AsmParser.cpp after this new code.

llvm-svn: 122531
2010-12-24 00:12:02 +00:00
Nick Lewycky 0de20af7ba Add missing standard headers. Patch by Joerg Sonnenberger!
llvm-svn: 122193
2010-12-19 20:43:38 +00:00
Roman Divacky 71d29167ea Add support for lexing single quotes like 'c'.
This fixed 8615.

llvm-svn: 122150
2010-12-18 08:56:37 +00:00
Rafael Espindola f8e127eaf6 Factor some code to parseSectionFlags and fix the default type of a section.
llvm-svn: 120145
2010-11-25 15:32:56 +00:00
Rafael Espindola 9f75d5df0b Behave a bit more like gnu as and use the symbol (instead of the section)
for any relocation to a symbol defined in a tls section.

llvm-svn: 120121
2010-11-24 21:57:39 +00:00
Rafael Espindola 3c227b0b89 Add basic CFI methods to the streamer interface.
llvm-svn: 119972
2010-11-22 14:27:24 +00:00
Kevin Enderby 8be14414f6 Added support for the Mach-O .symbol_resolver directive. rdar://8673046
llvm-svn: 119816
2010-11-19 18:39:33 +00:00
Rafael Espindola b67912d5cd Add support for .int.
llvm-svn: 119512
2010-11-17 16:24:40 +00:00
Rafael Espindola 5c996894bd Add support for .2byte, .4byte and .8byte.
Fixes PR8631.

llvm-svn: 119511
2010-11-17 16:15:42 +00:00
Rafael Espindola c653a895c8 Add .loc methods to the streamer.
Next: Add support for the !HasDotLocAndDotFile case to the MCAsmStreamer
and then switch codegen to use it.

llvm-svn: 119384
2010-11-16 21:20:32 +00:00
Rafael Espindola 3bbea57a6e Parse and ignore some .cfi_* directives.
llvm-svn: 119362
2010-11-16 18:34:07 +00:00
Rafael Espindola 46c79ef113 Fix PR8565.
This moves most of the isUsed logic to the MCSymbol itself. With this we
get a bit more relaxed about allowing definitions after uses: uses that
don't evaluate their argument immediately (jmp foo) are accepted.

ddunbar, this was the smallest compromise I could think of that lets us
accept gcc (and clang!) assembly.

llvm-svn: 119144
2010-11-15 14:40:36 +00:00
Rafael Espindola 4bcf94c75a Parse and record the gnu_unique_object type.
llvm-svn: 118980
2010-11-13 04:51:02 +00:00
Rafael Espindola f01b622902 Parse and remember discriminators in .loc line. I try to output them with
another patch.
This lets us parse a bit more of the gcc 4.5 output.

llvm-svn: 118975
2010-11-13 03:18:27 +00:00
Rafael Espindola de990b270d gnu as support both % and @ before types, do the same.
llvm-svn: 118893
2010-11-12 15:47:08 +00:00
Rafael Espindola 84d031870c Mark labels declared in tls sections as STT_TLS. This matches the behavior of
gas.

llvm-svn: 118818
2010-11-11 19:04:55 +00:00
Rafael Espindola a3e9a2298d Initial comdat implementation.
llvm-svn: 118805
2010-11-11 18:13:52 +00:00
Rafael Espindola 9bb44a5ce8 Fixed version of 118639 with an extra assert to catch similar problems
earlier. Implicit bool -> int conversions are evil!

llvm-svn: 118651
2010-11-09 23:42:07 +00:00
Rafael Espindola 33048f069f Revert previous patch. Missed a case.
llvm-svn: 118645
2010-11-09 22:54:38 +00:00
Rafael Espindola 4bdd2724e3 Remove IsExplicit. It was always false.
llvm-svn: 118639
2010-11-09 22:37:44 +00:00
Daniel Dunbar 8a3c3f2ad3 Fix typo.
llvm-svn: 118421
2010-11-08 17:53:02 +00:00
Rafael Espindola 9d17a3194e Set default flags for .rodata.
llvm-svn: 118395
2010-11-08 02:47:59 +00:00
Rafael Espindola 5e874982f2 Add support for expressions in .sleb/.uleb directives.
llvm-svn: 118023
2010-11-02 17:22:24 +00:00
Rafael Espindola 144fb8af58 Add support for .value.
llvm-svn: 117922
2010-11-01 15:29:07 +00:00
Rafael Espindola 1614597873 Implement .weakref.
llvm-svn: 117911
2010-11-01 14:28:48 +00:00
Rafael Espindola 8aefb66376 Improvements to .section parsing:
* If we have a M or a G, reject sections without the type
* Only parse the flag specific arguments if we have M or G
* Parse the corresponding arguments for M and G

We ignore the G arguments and flag for now.

llvm-svn: 117608
2010-10-28 21:33:33 +00:00
Rafael Espindola 63760ba38e Add support for the .string directive.
llvm-svn: 117592
2010-10-28 20:02:27 +00:00
Roman Divacky 41e6cebb40 Use the IDVal directly as there's no need to convert to std::string.
Pointed out by Chris!

llvm-svn: 117557
2010-10-28 16:57:58 +00:00
Roman Divacky fdac6365ab Implement .equ directive as a synonym to .set.
llvm-svn: 117553
2010-10-28 16:22:58 +00:00
Rafael Espindola 095fa9e5cc Set default type and flags for .init and .fini.
llvm-svn: 117471
2010-10-27 18:45:20 +00:00
Rafael Espindola eb0c2c170d Add support for the .symver directive. This is really ugly, but most of it is
contained in the ELF object writer.

llvm-svn: 117448
2010-10-27 15:18:17 +00:00
Rafael Espindola c9fb35e73b Add support for .ident.
llvm-svn: 117389
2010-10-26 19:35:47 +00:00
Daniel Dunbar b3a48f3459 MC/AsmParser: Fix relative precedence of {+,-} and comparison ops.
llvm-svn: 117299
2010-10-25 20:18:56 +00:00
Daniel Dunbar 7484d2cbec MC/AsmLexer: Fix bug in source location for Slash token.
llvm-svn: 117298
2010-10-25 20:18:53 +00:00
Chandler Carruth 1898262a33 Remove remaining uses of ATTRIBUTE_UNUSED on variables, and delete three
#includes in the process.

llvm-svn: 116919
2010-10-20 08:27:02 +00:00
Bill Wendling 5391eb61fb Fix spelling.
llvm-svn: 116804
2010-10-19 10:18:23 +00:00
Daniel Dunbar 4d99878a37 MC/AsmParser: Report .stabs directive as unsupported.
llvm-svn: 116659
2010-10-16 04:56:42 +00:00
Michael J. Spencer c8dbdfd4ba MC-COFF: Add COFFAsmParser. Completes PR8343.
llvm-svn: 116150
2010-10-09 11:01:07 +00:00
Michael J. Spencer 530ce85b3e Fix Whitespace.
llvm-svn: 116149
2010-10-09 11:00:50 +00:00
Michael J. Spencer 3d89823102 MC: Move ParseDirectiveELFType into ELFAsmParser. COFF uses .type for something else.
llvm-svn: 116142
2010-10-09 03:47:55 +00:00
Rafael Espindola b91bac6c96 Add support for a fill value in the .zero directive.
llvm-svn: 115655
2010-10-05 19:42:57 +00:00
Kevin Enderby a68d004d88 Incorporate suggestions by Daniel Dunbar after his review. Thanks Daniel!
1) Changed ValidateDwarfFileNumber() to isValidDwarfFileNumber() to be better
   named.  Since it is just a predicate and isn't actually changing any state.

2) Added a missing return in the comments for setCurrentDwarfLoc() in 
   include/llvm/MC/MCContext.h for fix formatting.

3) Changed clearDwarfLocSeen() to ClearDwarfLocSeen() since it does change
   state.

4) Simplified the last test in isValidDwarfFileNumber() to just a one line
   boolean test of MCDwarfFiles[FileNumber] != 0 for the final return statement.

llvm-svn: 115551
2010-10-04 20:17:24 +00:00
Jan Wen Voung 87f77b5f9a Add hook in MCSection to decide when to use "optimized nops", for each
section kind. Previously, optimized nops were only used for MachO.
Also added tests for ELF and COFF.

llvm-svn: 115523
2010-10-04 17:32:41 +00:00
Kevin Enderby e46564a4a8 This is the last major patch to implement support for the .loc directive
and output the dwarf line number tables.  This contains the code to emit and
encode the dwarf line tables from the previously gathered information in the
MCLineSection objects.  This contains all the details to encode the line and
address deltas into the dwarf line table.

To do this an MCDwarfLineAddrFragment has been added.

Also this moves the interface code out of Mach-O streamer into
MCDwarf so it should be useable by other object file formats.

There is now one call to be made from an MCObjectStreamer
EmitInstruction() method:
   MCLineEntry::Make(this, getCurrentSection());
to create a line entry after each instruction is assembled.

And one call call to be made from an MCObjectStreamer Finish() method:
   MCDwarfFileTable::Emit(this, DwarfLineSection);
when getContext().hasDwarfFiles() is true and is passed a object file specific
MCSection where to emit the dwarf file and the line tables.

This appears to now be correct for 32-bit targets, at least x86.  But the
relocation entries for 64-bit Darwin needs some further work which is next
up to work on.  So for now the 64-bit Mach-O target does not output the
dwarf file and line tables.

llvm-svn: 115157
2010-09-30 16:52:03 +00:00
Jan Wen Voung b96b2d8e4d Have ELFAsmParser.cpp use the already parsed "Size" (entry size) when
constructing a section. Test for a few cases also included.

llvm-svn: 115132
2010-09-30 02:41:46 +00:00
Jan Wen Voung c768287968 Test commit - Deleted some whitespace at the end of a line.
llvm-svn: 115122
2010-09-30 01:09:20 +00:00
Chris Lattner b44fd24fc1 change the protocol TargetAsmPArser::MatchInstruction method to take an
MCStreamer to emit into instead of an MCInst to fill in.  This allows the
matcher extra flexibility and is more convenient.

llvm-svn: 115014
2010-09-29 01:42:58 +00:00
Rafael Espindola 9ca41113f6 Make sure .text doesn't produce extra alignment.
llvm-svn: 114895
2010-09-27 21:40:27 +00:00
Daniel Dunbar d116d8a4e9 MC/AsmParser: Handle exponents in floating point literals.
llvm-svn: 114861
2010-09-27 20:12:52 +00:00
Benjamin Kramer c758311025 Push twines deeper into SourceMgr's error handling methods.
llvm-svn: 114847
2010-09-27 17:42:11 +00:00
Daniel Dunbar ce17f72c38 MC/AsmParser: Handle a missed case of floating literals in the lexer.
llvm-svn: 114733
2010-09-24 17:10:26 +00:00
Daniel Dunbar 2af1653032 MC/AsmParser: Support .single and .double for embedding floating point literals.
- I believe more modern 'gas' supports a more enhanced set of arithmetic on
   them, but for now the only thing we can do is emit them as data.

llvm-svn: 114719
2010-09-24 01:59:56 +00:00
Daniel Dunbar 3068a93dc1 MC/Lexer: Add 'Real' token type for floating point literals.
llvm-svn: 114718
2010-09-24 01:59:31 +00:00
Chris Lattner 2bb9504d1a fix rdar://8456417 - llvm-mc can't do basic math
llvm-svn: 114532
2010-09-22 05:05:16 +00:00
Rafael Espindola f0591c1642 Implement support for .local and its "interesting" interactions with .comm.
llvm-svn: 114382
2010-09-21 00:24:38 +00:00
Daniel Dunbar baad46c6ee Fix an MSVC warning.
llvm-svn: 114184
2010-09-17 16:34:24 +00:00
Daniel Dunbar 55f16678e4 MC/AsmParser: Add support for 'a + 4@GOTPCREL' and friends, by reconsing the
expression to include the modifier.
 - Gross, but this a corner case we don't expect to see often in practice, but
   it is worth accepting.
 - Also improves diagnostics on invalid modifiers.

llvm-svn: 114154
2010-09-17 02:47:07 +00:00
Rafael Espindola f7f433200b Make sure that names like .note.GNU-stack are accepted as valid section names.
llvm-svn: 114091
2010-09-16 17:05:55 +00:00
Rafael Espindola 922e3f454b Add support for the .zero directive.
llvm-svn: 114077
2010-09-16 15:03:59 +00:00
Rafael Espindola f667d929ce Add a InitSections method to the streamer interface.
The ELF implementation now creates text, data and bss to match the gnu as
behavior.

The text streamer still has the old MachO specific behavior since
the testsuite checks that it will error when a directive is given
before a setting the current section for example.

A nice benefit is that -n is not required anymore when producing
ELF files.

llvm-svn: 114027
2010-09-15 21:48:40 +00:00
Rafael Espindola 12d73d1f18 Add support for leb128 of absolute expressions.
llvm-svn: 113691
2010-09-11 16:45:15 +00:00
Chris Lattner a2a9d16b78 fix the asmparser so that the target is responsible for skipping to
the end of the line on a parser error, allowing skipping to happen
for syntactic errors but not for semantic errors.  Before we would
miss emitting a diagnostic about the second line, because we skipped
it due to the semantic error on the first line:

  foo %eax
  bar %al

This fixes rdar://8414033 - llvm-mc ignores lines after an invalid instruction mnemonic errors

llvm-svn: 113688
2010-09-11 16:18:25 +00:00
Daniel Dunbar e5444a88cd llvm-mc: Don't crash when using -n and we see a directive before the initial section.
- This is annoying, because we have to scatter this check everywhere that could emit real data, but I see no better solution.

llvm-svn: 113552
2010-09-09 22:42:59 +00:00