Commit Graph

1450 Commits

Author SHA1 Message Date
Evan Cheng 5928e69d20 Rename TargetAsmBackend to MCAsmBackend; rename createAsmBackend to createMCAsmBackend.
llvm-svn: 136010
2011-07-25 23:24:55 +00:00
Chandler Carruth b2561029b1 Add a missing enumerator to this switch. Currently its in the
assert-path code, as previously we would have fallen off the end of the
function, but please review and let me know if this should go somewhere
else.

This fixes a Clang warning:
lib/MC/MCMachOStreamer.cpp:201:11: error: enumeration value 'MCSA_IndirectSymbol' not handled in switch [-Werror,-Wswitch-enum]
  switch (Attribute) {
          ^
1 error generated.

llvm-svn: 135976
2011-07-25 21:21:08 +00:00
Evan Cheng 61faa55b74 Separate MCInstPrinter registration from AsmPrinter registration.
llvm-svn: 135974
2011-07-25 21:20:24 +00:00
Evan Cheng f60768a14e Fix last bits of MC layer issues. llvm-mc doesn't need to initialize TargetMachine's anymore.
llvm-svn: 135963
2011-07-25 20:53:02 +00:00
Evan Cheng 7e763d86ba Refactor X86 target to separate MC code from Target code.
llvm-svn: 135930
2011-07-25 18:43:53 +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 ad5f485957 Sink ARM mc routines into MCTargetDesc.
llvm-svn: 135825
2011-07-23 00:00:19 +00:00
Evan Cheng 8c886a40d2 Combine all MC initialization routines into one. e.g. InitializeX86MCAsmInfo,
InitializeX86MCInstrInfo, etc. are combined into InitializeX86TargetMC.

llvm-svn: 135812
2011-07-22 21:58:54 +00:00
Bill Wendling 4d9aa512f8 Emit the __compact_unwind section first. If there are any frames which weren't
emitted, emit them next as CIE/FDEs.

llvm-svn: 135807
2011-07-22 21:18:59 +00:00
Evan Cheng c3035d6657 X86 is the only target that uses coff format. This should fixes test failures running on Windows, Cygwin, or MingW hosts.
llvm-svn: 135639
2011-07-20 23:53:54 +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
Benjamin Kramer acb9ed4077 Initialize the EHFrameSection pointer to zero.
This should fix the spurious buildbot errors.

llvm-svn: 135594
2011-07-20 18:13:23 +00:00
Evan Cheng efd9b4240f - Move CodeModel from a TargetMachine global option to MCCodeGenInfo.
- Introduce JITDefault code model. This tells targets to set different default
  code model for JIT. This eliminates the ugly hack in TargetMachine where
  code model is changed after construction.

llvm-svn: 135580
2011-07-20 07:51:56 +00:00
Evan Cheng 345b6b45c1 Include MCRegisterInfo to eliminate a compilation warning.
llvm-svn: 135575
2011-07-20 06:54:19 +00:00
Francois Pichet e3063f022b Fix the CMake build.
llvm-svn: 135573
2011-07-20 06:35:24 +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 2129f59637 Introduce MCCodeGenInfo, which keeps information that can affect codegen
(including compilation, assembly). Move relocation model Reloc::Model from
TargetMachine to MCCodeGenInfo so it's accessible even without TargetMachine.

llvm-svn: 135468
2011-07-19 06:37:02 +00:00
Bill Wendling ada366c691 Micro-opt: Only emit compact unwind if there is a compact unwind encoding to emit.
llvm-svn: 135452
2011-07-19 00:09:25 +00:00
Bill Wendling 49bc680bdf Use the CompactUnwindEncoding from the Frame, if it's defined.
llvm-svn: 135451
2011-07-19 00:06:12 +00:00
Bill Wendling c438d78c38 Add a method to set compact unwind encoding information in a frame.
llvm-svn: 135449
2011-07-19 00:01:42 +00:00
Sean Callanan 67bc18552a Fixed a bug where the MC subtarget information
wasn't being initialized by the enhanced disassembler,
leading to assertion failures. 

llvm-svn: 135447
2011-07-19 00:00:41 +00:00
Evan Cheng 67c033e6b8 Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for
better location welcome).

llvm-svn: 135438
2011-07-18 22:29:13 +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
Bill Wendling 9b8605f787 Remove setting the bit for personality function. It should be set by the linker.
llvm-svn: 135236
2011-07-15 01:42:32 +00:00
Bill Wendling c998f71d14 Encode that we have a personality function.
llvm-svn: 135227
2011-07-15 00:07:31 +00:00
Evan Cheng 1705ab00ab Rename createAsmInfo to createMCAsmInfo and move registration code to MCTargetDesc to prepare for next round of changes.
llvm-svn: 135219
2011-07-14 23:50:31 +00:00
Bill Wendling dafd598f05 * If we have an LSDA, we need to mark it in the encoding.
* The personality function should be encoded as an absolute pointer to the function.

llvm-svn: 135215
2011-07-14 23:34:45 +00:00
Evan Cheng c7ac690ba2 Unfortunately several files in MC are badly violating layering rule by using
TargetAsmInfo, which in turn pulls in TargetRegisterInfo, etc. :-( There are
other cases of violations, but this is probably the worst.

This patch is but one small step towards fixing this. 500 more steps to go. :-(

llvm-svn: 135131
2011-07-14 05:43:07 +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
Bill Wendling ee6e776be2 Don't emit the FDE end label if the last thing emitted was a compact unwind and
not the FDE

llvm-svn: 135020
2011-07-13 00:49:09 +00:00
Shantonu Sen 761feb85e1 Resynchronize EDInfo.h and EDEmitter.cpp.
The enum names as well as order (i.e. value)
had skewed, which means that consumers of the
tablegen-ed table would see different values than
intended. Make both files have a superset of enums,
and add classification as needed for numMCOperands.

Reviewed by Owen Anderson

llvm-svn: 134905
2011-07-11 17:57:30 +00:00
Evan Cheng c5e6d2f519 - Eliminate MCCodeEmitter's dependency on TargetMachine. It now uses MCInstrInfo
and MCSubtargetInfo.
- Added methods to update subtarget features (used when targets automatically
  detect subtarget features or switch modes).
- Teach X86Subtarget to update MCSubtargetInfo features bits since the
  MCSubtargetInfo layer can be shared with other modules.
- These fixes .code 16 / .code 32 support since mode switch is updated in
  MCSubtargetInfo so MC code emitter can do the right thing.

llvm-svn: 134884
2011-07-11 03:57:24 +00:00
Evan Cheng 91111d2706 Change createAsmParser to take a MCSubtargetInfo instead of triple,
CPU, and feature string. Parsing some asm directives can change
subtarget state (e.g. .code 16) and it must be reflected in other
modules (e.g. MCCodeEmitter). That is, the MCSubtargetInfo instance
must be shared.

llvm-svn: 134795
2011-07-09 05:47:46 +00:00
Evan Cheng 15bc70f765 Fix comment.
llvm-svn: 134763
2011-07-08 22:49:42 +00:00
Evan Cheng 22e9d8f40e TargetAsmParser doesn't need reference to Target.
llvm-svn: 134721
2011-07-08 19:33:14 +00:00
Evan Cheng 4d1ca96bfc Eliminate asm parser's dependency on TargetMachine:
- Each target asm parser now creates its own MCSubtatgetInfo (if needed).
- Changed AssemblerPredicate to take subtarget features which tablegen uses
  to generate asm matcher subtarget feature queries. e.g.
  "ModeThumb,FeatureThumb2" is translated to
  "(Bits & ModeThumb) != 0 && (Bits & FeatureThumb2) != 0".

llvm-svn: 134678
2011-07-08 01:53:10 +00:00
Akira Hatanaka 2f2d9cbb22 This patch adds a flag in MCAsmInfo that indicates whether dwarf register
numbers should be printed instead of symbolic register names in
MCAsmStreamer::EmitRegisterName. This is necessary because some versions of
GNU assembler won't accept code in which symbolic register names are used in
cfi directives. There is no change in behavior unless the flag is explicitly
set to true by a backend.

llvm-svn: 134635
2011-07-07 20:30:33 +00:00
Evan Cheng 1a72add615 Compute feature bits at time of MCSubtargetInfo initialization.
llvm-svn: 134606
2011-07-07 07:07:08 +00:00
Bill Wendling b6adf46f62 Add a target hook to encode the compact unwind information.
llvm-svn: 134577
2011-07-07 00:54:13 +00:00
Bill Wendling 7ed5625082 Clean up the #includes.
llvm-svn: 134557
2011-07-06 22:52:32 +00:00
Evan Cheng ab37af9af3 createMCInstPrinter doesn't need TargetMachine anymore.
llvm-svn: 134525
2011-07-06 19:45:42 +00:00
Evan Cheng fb71f4260a Add getFeatureBits to extract feature bits for a given CPU.
llvm-svn: 134298
2011-07-02 00:43:44 +00:00
Evan Cheng 54b68e3432 - Added MCSubtargetInfo to capture subtarget features and scheduling
itineraries.
- Refactor TargetSubtarget to be based on MCSubtargetInfo.
- Change tablegen generated subtarget info to initialize MCSubtargetInfo
  and hide more details from targets.

llvm-svn: 134257
2011-07-01 20:45:01 +00:00
Evan Cheng c88d6d402a Eliminate one extra conversion.
llvm-svn: 134240
2011-07-01 16:59:30 +00:00
Francois Pichet 92da450ae7 Another misuse of StringRef. MSVC is very sensitive to that kind of error.
llvm-svn: 134236
2011-07-01 09:23:41 +00:00
Rafael Espindola 968af4fee2 Fix use after free.
llvm-svn: 134234
2011-07-01 04:40:50 +00:00
Evan Cheng d8e27a584e Switch SubtargetFeatures from std::string to StringRef.
llvm-svn: 134219
2011-07-01 00:23:10 +00:00
Bill Wendling c737ac1816 Remove tabs.
llvm-svn: 134212
2011-06-30 23:59:38 +00:00
Bill Wendling 40cc749788 Improve comment: Show the register the DWARF label is added to.
llvm-svn: 134209
2011-06-30 23:47:40 +00:00
Bill Wendling 2fd8d775df Add one more comment to the FDE verbose asm output.
llvm-svn: 134200
2011-06-30 22:35:49 +00:00
Bill Wendling f166ab447e Add comments to the FDE.
llvm-svn: 134196
2011-06-30 22:02:20 +00:00
Bill Wendling e7fe47e53b Add more comments to the ASM output for the CIE's "moves".
llvm-svn: 134194
2011-06-30 21:45:12 +00:00
Bill Wendling 567a1aee85 Add comments to the ASM output to help understand the compact unwind and CIE tables.
llvm-svn: 134191
2011-06-30 21:25:51 +00:00
Evan Cheng fe6e405e8c Fix the ridiculous SubtargetFeatures API where it implicitly expects CPU name to
be the first encoded as the first feature. It then uses the CPU name to look up
features / scheduling itineray even though clients know full well the CPU name
being used to query these properties.

The fix is to just have the clients explictly pass the CPU name!

llvm-svn: 134127
2011-06-30 01:53:36 +00:00
Bill Wendling 7517466970 * Use the proper size to output the range size.
* Rough in the compact encoding part.

llvm-svn: 134119
2011-06-30 00:30:52 +00:00
Bill Wendling 4cdb206e76 Stupid error: If the LSDA and Personality functions aren't there, emit 0 instead
of the encoding.

llvm-svn: 134117
2011-06-29 23:53:16 +00:00
Bill Wendling 8fa4ada5cf We don't want to use relocations inside the compact unwind section. Just use the
symbols instead.

llvm-svn: 134115
2011-06-29 23:49:12 +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
NAKAMURA Takumi 7e26682c71 Fix CMake build.
llvm-svn: 134055
2011-06-29 03:26:17 +00:00
Evan Cheng 8264e272a9 Sink SubtargetFeature and TargetInstrItineraries (renamed MCInstrItineraries) into MC.
llvm-svn: 134049
2011-06-29 01:14:12 +00:00
Jim Grosbach 28fcafb502 Refactor MachO relocation generaration into the Target directories.
Move the target-specific RecordRelocation logic out of the generic MC
MachObjectWriter and into the target-specific object writers. This allows
nuking quite a bit of target knowledge from the supposedly target-independent
bits in lib/MC.

llvm-svn: 133844
2011-06-24 23:44:37 +00:00
Jim Grosbach 018970216c tidy up whitespace.
llvm-svn: 133815
2011-06-24 19:43:27 +00:00
Jim Grosbach 3c9ede62f6 Fixup info for Thumb2 unconditional branch.
rdar://9667872

llvm-svn: 133808
2011-06-24 18:48:32 +00:00
Jim Grosbach 7633256b9d Tidy up.
llvm-svn: 133770
2011-06-23 22:29:00 +00:00
Jay Foad 61ea0e4692 Reinstate r133513 (reverted in r133700) with an additional fix for a
-Wshorten-64-to-32 warning in Instructions.h.

llvm-svn: 133708
2011-06-23 09:09:15 +00:00
Bill Wendling 25fbb92320 Use a reference. Don't make a useless copy of the vector.
llvm-svn: 133707
2011-06-23 07:55:41 +00:00
Bill Wendling a4b9d1f97b Formatting changes. No functionality change.
llvm-svn: 133706
2011-06-23 07:44:54 +00:00
Eric Christopher 96513120b7 Revert r133513:
"Reinstate r133435 and r133449 (reverted in r133499) now that the clang
self-hosted build failure has been fixed (r133512)."

Due to some additional warnings.

llvm-svn: 133700
2011-06-23 06:24:52 +00:00
Bill Wendling 9af2fa9d1b Use the presence of the __compact_unwind section to indicate that a target
supports compact unwind info instead of having a separate flag indicating this.

llvm-svn: 133685
2011-06-23 05:13:28 +00:00
Bill Wendling e8fc92ad46 Some skeleton code to emit the compact unwind. If the information is unable to
be emitted in a compact way, we then default to emitting a CIE and FDE.

llvm-svn: 133676
2011-06-23 01:06:23 +00:00
Bill Wendling 21162219b4 80-column violations.
llvm-svn: 133668
2011-06-23 00:09:43 +00:00
Bill Wendling eb872e0471 Move class methods out-of-line. This reduces the indentation, and is more in
line with LLVM's general coding style.
No functionality change.

llvm-svn: 133645
2011-06-22 21:07:27 +00:00
Bill Wendling b3aaf95c4f Remove the subclassing. This will be moved to the ASM printer.
llvm-svn: 133473
2011-06-20 22:12:24 +00:00
Benjamin Kramer f7cb7ef996 Directly print to a raw_ostream instead of printing to a buffer first.
llvm-svn: 133352
2011-06-18 14:42:47 +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
Bill Wendling 098321c145 * Override the "EmitBytes" function, since it can sneak values in that way.
* Make this used only if CFI is used.

llvm-svn: 133319
2011-06-18 00:19:35 +00:00
Bill Wendling 804e6d191b Remove false assertion.
llvm-svn: 133314
2011-06-17 23:42:01 +00:00
Bill Wendling 03cb993560 Disable for another investigation.
llvm-svn: 133299
2011-06-17 21:44:15 +00:00
Bill Wendling 23de6d07c4 Support only DwarfCFI or SjLj exception handling in LSDA decoder.
llvm-svn: 133297
2011-06-17 21:31:43 +00:00
Bill Wendling 590adcbcbf SjLj exception handling LSDA decoding support wasn't represented correctly. Use
the correct values, etc. In particular, the exception handling type is SjLj, not
ARM.

llvm-svn: 133296
2011-06-17 21:29:06 +00:00
Bill Wendling cc648ad092 Disable to investigate ARM failure.
llvm-svn: 133293
2011-06-17 21:09:50 +00:00
Bill Wendling b74b9de151 Use the verbose asm flag instead of a new flag for decoding the LSDA.
llvm-svn: 133292
2011-06-17 20:55:01 +00:00
Bill Wendling e303114b3c Add an option that allows one to "decode" the LSDA.
The LSDA is a bit difficult for the non-initiated to read. Even with comments,
it's not always clear what's going on. This wraps the ASM streamer in a class
that retains the LSDA and then emits a human-readable description of what's
going on in it.

So instead of having to make sense of:

Lexception1:
        .byte   255
        .byte   155
        .byte   168
        .space  1
        .byte   3
        .byte   26
Lset0 = Ltmp7-Leh_func_begin1
      .long     Lset0
Lset1 = Ltmp812-Ltmp7
      .long     Lset1
Lset2 = Ltmp913-Leh_func_begin1
      .long     Lset2
      .byte     3
Lset3 = Ltmp812-Leh_func_begin1
      .long     Lset3
Lset4 = Leh_func_end1-Ltmp812
      .long     Lset4
      .long     0
      .byte     0
      .byte     1
      .byte     0
      .byte     2
      .byte     125
      .long     __ZTIi@GOTPCREL+4
      .long     __ZTIPKc@GOTPCREL+4

you can read this instead:

## Exception Handling Table: Lexception1
##  @LPStart Encoding: omit
##    @TType Encoding: indirect pcrel sdata4
##        @TType Base: 40 bytes
## @CallSite Encoding: udata4
## @Action Table Size: 26 bytes

## Action 1:
##   A throw between Ltmp7 and Ltmp812 jumps to Ltmp913 on an exception.
##     For type(s):  __ZTIi@GOTPCREL+4 __ZTIPKc@GOTPCREL+4
## Action 2:
##   A throw between Ltmp812 and Leh_func_end1 does not have a landing pad.

llvm-svn: 133286
2011-06-17 20:35:21 +00:00
Benjamin Kramer 29a9d7653a Remove a useless copy of MCELFStreamer. Patch by Logan Chien!
llvm-svn: 133272
2011-06-17 18:05:30 +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
Roman Divacky 4b5665a1f7 Fix emission of PPC64 assembler on non-darwin platforms by splitting
VK_PPC_{HA,LO}16 into darwin and gas variants.

Darwin wants {ha,lo}16(symbol) while gnu as wants symbol@{ha,l}.

llvm-svn: 132802
2011-06-09 20:25:38 +00:00
Jason W Kim 7fbe7914af Remove an uneeded switch - Turns out reloc results are identical w/o the switch. (face+palm)
llvm-svn: 132790
2011-06-09 19:13:45 +00:00
Roman Divacky 384ffa9a0e Make EmitIntValue() work properly on big-endian targets.
llvm-svn: 132715
2011-06-07 17:31:02 +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
Rafael Espindola 940a0ee5ca Produce an undefined reference to _GLOBAL_OFFSET_TABLE_ if we have a
VK_GOTOFF reloc. This matches as' behavior, but it is not clear why the linker
might need this, so I added a FIXME.

I could test this by duplicating test/MC/ELF/got.s, but it doesn't look
worthwhile.

llvm-svn: 132655
2011-06-05 01:20:06 +00:00
Nick Lewycky 34fa1684e7 Add support for @GOTPTOFF in i386 mode.
llvm-svn: 132643
2011-06-04 17:38:07 +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
Rafael Espindola d6860522b2 Don't hardcode the %reg format in the streamer.
llvm-svn: 132451
2011-06-02 02:34:55 +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
Rafael Espindola 08600bcf65 Use the dwarf->llvm mapping to print register names in the cfi
directives.

Fixes PR9826.

llvm-svn: 132317
2011-05-30 20:20:15 +00:00
Charles Davis 03eef62db0 Add a parameter to the Win64 EH section getters to get a section with a
suffix (e.g. .xdata$myfunc). The suffix part isn't implemented yet, but
I'll get to it in the next patch.

Fix up all callers of the affected functions. Make them pass said suffix to
the function.

llvm-svn: 132205
2011-05-27 19:09:24 +00:00
Charles Davis ea5dc3a67b Assorted fixes for Win64 EH unwind info emission:
- Flip order of bitfields. This gets our output matching GAS.
- Handle case where the end of the prolog wasn't specified.
- If the resulting unwind info struct is less than 8 bytes, pad to 8 bytes.

Add a test for the latter two.

llvm-svn: 132188
2011-05-27 15:10:25 +00:00
Charles Davis 6d1c4c73a9 Start keeping track of where the various unwind instructions are in the prolog.
Use them to calculate the offset inside the prolog. Emit this value when
emitting the unwind codes.

llvm-svn: 132177
2011-05-27 03:25:01 +00:00
Charles Davis 761313b28d Add missing break statements. Align UNWIND_INFO and RUNTIME_FUNCTION structs
to 4 bytes.

I'm surprised no one caught the missing break statements.

llvm-svn: 132176
2011-05-27 02:43:19 +00:00
Charles Davis a60cd577fd My attempt at fixing the leak reported by the valgrind buildbots. Valgrind will
still report leaks, but they're spurious now. Valgrind cannot peer into
std::vector objects--or any dynamic array, for that matter--because it doesn't
know how big the array is.

llvm-svn: 132174
2011-05-27 02:01:08 +00:00
Charles Davis 9dcee31aab Fix inverted conditional in SaveReg and SaveXMM. Err when the frame pointer is
already defined, and err when the PushMachFrame operation isn't the first
operation (if specified at all).

llvm-svn: 132173
2011-05-27 01:42:17 +00:00
Charles Davis 006e1c39d0 Test .seh_startchained and .seh_endchained parsing.
Rework how the MCWin64EHUnwindInfo instances are stored. Fix issues with
chained unwind areas exposed by the test that were related to this.

The ChainedParent field had the wrong address, because when the chained unwind
info was added, the addresses shifted around. Now we store the pointers to the
structures, which are now allocated from the MC heap.

llvm-svn: 132106
2011-05-26 02:45:47 +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 f4ce8fde18 Test basic SEH directive-parsing functionality. Fix a latent bug exposed by
this test.

llvm-svn: 132004
2011-05-24 21:22:53 +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
Chris Lattner 1d068cc0b0 switch to using a smallvector to avoid allocations for most normal size instructions.
llvm-svn: 131837
2011-05-22 04:53:24 +00:00
Chris Lattner 0388fb0ee2 tidy some things up.
llvm-svn: 131836
2011-05-22 04:52:24 +00:00
Charles Davis bc2daa0f93 Implement emission of all Win64 exception tables. Make the COFF streamer emit
these tables.

llvm-svn: 131833
2011-05-22 04:15:07 +00:00
Charles Davis 1c8bd5ad7e Make the COFF streamer emit unwind info when processing a .seh_handlerdata
directive.

Implement emission of Win64 EH unwind info.

Pull in <cassert> in MCWin64EH.h so it can use the assert() macro.

llvm-svn: 131832
2011-05-22 03:01:05 +00:00
Charles Davis e636022b4d Don't allow unaligned offsets and sizes in the Win64 EH directives.
Also, fix threshold for 'Big' register saves.

llvm-svn: 131830
2011-05-22 00:56:20 +00:00
Charles Davis 6879634efd Don't allow .seh_handler and .seh_handlerdata directives inside chained
unwind areas.

llvm-svn: 131795
2011-05-21 17:36:25 +00:00
Charles Davis 8e8f59bdfb A handler for a function in the Win64 EH scheme can be both an unwind handler
and an exception handler. Handle that case.

Also, add an 'Emitted' member to the MCWin64EHUnwindInfo struct. It will be
needed later.

llvm-svn: 131791
2011-05-21 15:57:49 +00:00
Charles Davis 54254008ba Set the "LastFrameInst" field when streaming a .seh_setframe directive. This
is needed for an upcoming patch.

llvm-svn: 131772
2011-05-21 00:09:04 +00:00
Jim Grosbach 8aded86edb No reason not to allow defining the CFA as a reg w/ offset zero.
llvm-svn: 131760
2011-05-20 21:50:09 +00:00
Jim Grosbach 860b03b5f9 Add missing leading \t when printing .cfi_def_cfa in the asmstreamer.
llvm-svn: 131755
2011-05-20 21:22:37 +00:00
Rafael Espindola 1866808384 fixes target address tBL and tBLX and sets relocation type
of tBL/tBLX to R_ARM_THM_CALL (ARM ELF 4.7.1.6)

Patch by koan-sin tan.

llvm-svn: 131748
2011-05-20 20:01:01 +00:00
Charles Davis 9a115a4bd2 Now that they're implemented, make the Win64 EH MCAsmStreamer methods call
super.

llvm-svn: 131743
2011-05-20 18:19:22 +00:00
Charles Davis 24b31b6b7d "Implement" the HandlerData Win64 EH method in the base MCStreamer.
There's really nothing to implement. All this really does is swap to a
pseudo-section that later gets written to the unwind info struct. That
needs to be implemented in the object streamers.

llvm-svn: 131734
2011-05-20 16:06:22 +00:00
Rafael Espindola 1edfb17bc2 Looks like OS X assemblers (including MC) don't like
foo:
bar = foo
.quad bar

Avoid producing it. Fixes PR9951.

llvm-svn: 131687
2011-05-19 22:05:56 +00:00
Rafael Espindola 8e129296fe Misc code refactorings:
* Remove unnecessary arguments now that ForceExpAbs is a method.
* Use ForceExpAbs in EmitAbsValue.

llvm-svn: 131683
2011-05-19 21:40:34 +00:00
Charles Davis de745ba396 Implement the EndProlog Win64 EH method on the base MCStreamer.
llvm-svn: 131679
2011-05-19 21:24:54 +00:00
Charles Davis 7e6e8951af Implement the Win64 EH prolog instruction methods on the base MCStreamer.
I had to change the API slightly to avoid overloading issues.

llvm-svn: 131666
2011-05-19 19:35:55 +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
Charles Davis 4cd8856704 Turns out GAS does have Win64 EH directives. (It also supports WinCE EH.) Make
ours compatible with GAS.

In retrospect, I should have emailed binutils about this earlier. Thanks to
Kai Tietz for pointing out that GAS already had SEH directives.

llvm-svn: 131652
2011-05-19 17:46:39 +00:00
Joerg Sonnenberger 59b523169f Introduce -fatal-assembler-warnings for the obvious purpose
llvm-svn: 131644
2011-05-19 17:27:01 +00:00
Charles Davis b4222589bf Implement the StartChained and EndChained Win64 EH methods on MCStreamer.
llvm-svn: 131629
2011-05-19 04:04:13 +00:00
Charles Davis d991ec4e68 Implement the StartProc and EndProc Win64 EH methods on the base MCStreamer.
Based largely on Rafael Espindola's work on CFI. Other methods soon to follow.

llvm-svn: 131623
2011-05-19 02:49:00 +00:00
Charles Davis 27117af772 Remove comments as Chris requested.
llvm-svn: 131590
2011-05-18 22:13:51 +00:00
Cameron Zwarich 492f87de4e Fix an obvious typo in r131572.
llvm-svn: 131579
2011-05-18 21:29:07 +00:00
Charles Davis 77e0610d7c Add some more Win64 EH directives:
- StartChained and EndChained delimit a chained unwind area, which can contain
  additional operations to be undone if an exception occurs inside of it.
- UnwindOnly declares that this function doesn't handle any exceptions. If it
  has a handler, it's an unwind handler instead of an exception handler.
- Lsda declares the location and size of the LSDA, which in the Win64 EH
  scheme is kept inside the UNWIND_INFO struct. Windows itself ignores the
  LSDA; it's used by the Language-Specific Handler (the "Personality Function"
  from DWARF).

llvm-svn: 131572
2011-05-18 20:54:10 +00:00
Charles Davis 8d9c99042f Implement the Win64 EH directive methods for the assembly language streamer.
GAS has no such directives (not even mingw-w64 GAS has them), so I took
creative license with their names in assembly. I prefixed them all with
"w64_" to avoid namespace collisions, for example. If I discover that GAS
has taken a different approach, I'll change ours to match.

llvm-svn: 131525
2011-05-18 04:58:05 +00:00
Charles Davis 384041d0dc While thinking about how to know where the functions' boundaries are for
the purposes of the Win64 EH tables, I realized we had no way to tell where
the function ends. (MASM bounds functions with PROC and ENDP keywords.)
Add a directive to delimit the end of the function, and rename the 'frame'
directive to more accurately reflect its duality with the new directive.

llvm-svn: 131522
2011-05-18 04:47:22 +00:00
Charles Davis 2701815ed8 Add a method I forgot in the last commit. Don't worry, this one passed
self-host :).

llvm-svn: 131421
2011-05-16 21:13:58 +00:00
Jason W Kim 94c31fdd31 Add a FIXME reminder to remove ForceARMElfPIC switch.
llvm-svn: 131411
2011-05-16 16:35:21 +00:00
Rafael Espindola e90c1cb221 sets bit 0 of the function address of thumb function in .symtab
("T is 1 if the target symbol S has type STT_FUNC and the
symbol addresses a Thumb instruction ;it is 0 otherwise."
from "ELF for the ARM Architecture" 4.7.1.2)

Patch by Koan-Sin Tan!

llvm-svn: 131406
2011-05-16 16:17:21 +00:00
Charles Davis 2f10078ae7 Fix copy-pasto.
llvm-svn: 131384
2011-05-15 17:28:27 +00:00
Charles Davis af18d07ed6 Add stub methods to MCStreamer for emitting Win64 exception-handling
information.

llvm-svn: 131382
2011-05-15 17:20:01 +00:00
Matt Beaumont-Gay 7c6c90b35d Remove an unused variable and move a couple others inside DEBUG.
llvm-svn: 131208
2011-05-11 23:34:51 +00:00