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509 Commits

Author SHA1 Message Date
Daniel Dunbar
7d7b6cf3b7 MC/Mach-O: As Kevin pointed out, 'Address' is really an offset -- rename to clarify. 
llvm-svn: 103526
 2010-05-11 23:53:07 +00:00
Daniel Dunbar
e43676c164 MC/Mach-O: Fix a crash on invalid. 
llvm-svn: 103525
 2010-05-11 23:53:05 +00:00
Daniel Dunbar
7670f69e42 MC/Mach-O x86_64: Switch to using fragment atom symbol. 
- This eliminates getAtomForAddress() (which was a linear search) and
   simplifies getAtom().
 - This also fixes some correctness problems where local labels at the same
   address as non-local labels could be assigned to the wrong atom.

llvm-svn: 103480
 2010-05-11 17:22:50 +00:00
Daniel Dunbar
d2c14ce38d MC/Mach-O: Fix another mismatch with .weak_definition, we shouldn't use a 
scattered relocation entry with a .weak_definition.

llvm-svn: 103443
 2010-05-10 23:15:20 +00:00
Daniel Dunbar
c54539c121 MC/Mach-O: Factor out doesSymbolRequireExternRelocation. 
llvm-svn: 103442
 2010-05-10 23:15:13 +00:00
Daniel Dunbar
00ffbb63da MC/Mach-O: Explicitly track atoms, as represented by their defining symbol, for each fragment (not yet used). 
llvm-svn: 103438
 2010-05-10 22:45:09 +00:00
Nathan Jeffords
2932cc35b5 test commit, added a comment to MCSectionCOFF::PrintSwitchToSection function 
llvm-svn: 103372
 2010-05-09 05:49:00 +00:00
Chris Lattner
568058ef71 break coff symbol definition stuff out into proper MCStreamer callbacks, 
patch by Nathan Jeffords!

llvm-svn: 103346
 2010-05-08 19:54:22 +00:00
Chris Lattner
e72e3e9c12 add COFF support for COMDAT sections, patch by Nathan Jeffords! 
llvm-svn: 103304
 2010-05-07 21:49:09 +00:00
Kevin Enderby
3807a4746a Fix i386 relocations to Weak Definitions. The relocation entries should be 
external and the item to be relocated should not have the address of the
symbol added in.

llvm-svn: 103302
 2010-05-07 21:44:23 +00:00
Ted Kremenek
92ee3f2897 Update CMake build. 
llvm-svn: 103269
 2010-05-07 17:29:48 +00:00
Chris Lattner
c1d0e3a79e switch MCSectionCOFF from a syntactic to semantic representation, 
patch by Peter Housel!

llvm-svn: 103267
 2010-05-07 17:17:41 +00:00
Daniel Dunbar
a3731b17c0 Revert r103137, fix for $ in labels. It looks like we can't actually handle this 
at the token level. Consider the following horrible test case:

  a = 1
  .globl $a
  movl ($a), %eax
  movl $a, %eax
  movl $$a, %eax

llvm-svn: 103178
 2010-05-06 14:46:38 +00:00
Chris Lattner
ca80f41a4d fix rdar://7946934 - in some limited cases, the assembler should 
allow $ at the start of a symbol name.

llvm-svn: 103137
 2010-05-05 23:51:28 +00:00
Daniel Dunbar
9a3d46162f MC/Mach-O: Mark absolute variable's appropriately, and add Mach-O support for 
writing them.
 - <rdar://problem/7885351> integrated assembler broken for i386 objc code

llvm-svn: 103112
 2010-05-05 19:01:05 +00:00
Daniel Dunbar
139bd85642 MC: Reject attempts to define a variable symbol. 
llvm-svn: 103111
 2010-05-05 19:01:00 +00:00
Daniel Dunbar
258ede3795 MC: Make setVariableValue check the redefinition condition a bit more strongly. 
llvm-svn: 103110
 2010-05-05 19:00:56 +00:00
Daniel Dunbar
d2ac9dc48b MC: Rename MCSymbol::{g,s}etValue -> MCSymbol::{g,s}etVariableValue. 
llvm-svn: 103095
 2010-05-05 17:41:00 +00:00
Daniel Dunbar
f5dc70a7d1 MC/Mach-O/x86_64: Relocations in debug sections should use local relocations 
when possible.
 - <rdar://problem/7934873>

llvm-svn: 103092
 2010-05-05 17:22:39 +00:00
Daniel Dunbar
b7e0c07d88 llvm-mc: Fix case were we would skip a line in the .s file after an instruction 
match failure.

Also, fixes a few memory leak FIXMEs.

llvm-svn: 102986
 2010-05-04 00:33:07 +00:00
Mon P Wang
bfebbd889a Add support for assemblers that don't support periods in a name 
llvm-svn: 102594
 2010-04-29 04:00:56 +00:00
Chris Lattner
a5798151a3 refactor .if handling code a bit. 
llvm-svn: 101659
 2010-04-17 18:14:27 +00:00
Chris Lattner
124dc743bc implement mc asmparser support for '.', which gets the 
current PC.  rdar://7834775

We now produce an identical .o file compared to the cctools
assembler for something like this:

_f0:
L0:
        jmp L1
        .long . - L0
L1:
        jmp A
        .long . - L1

        .zerofill __DATA,_bss,A,0

llvm-svn: 101227
 2010-04-14 04:40:28 +00:00
Chris Lattner
1cf4bded13 move elf section uniquing to MCContext. Along the way 
merge XCore's section into MCSectionELF

llvm-svn: 100812
 2010-04-08 21:26:26 +00:00
Chris Lattner
60ff59e5c1 move macho section uniquing from MCParser and TLOF to MCContext where 
the compiler and asmparser now unique to the same sections.  This fixes
rdar://7835021.

llvm-svn: 100807
 2010-04-08 20:30:37 +00:00
Benjamin Kramer
3b7602b1fb Various MSVC warning fixes about truncated 64 bit shifts and const pointers passed to free. 
llvm-svn: 100767
 2010-04-08 15:25:57 +00:00
Chris Lattner
80b41881bc rename llvm::llvm_report_error -> llvm::report_fatal_error 
llvm-svn: 100709
 2010-04-07 22:58:41 +00:00
Chris Lattner
f753452587 Give AsmParser an option to control whether it finalizes 
the stream.  New demo:

$ clang asm.c -S -o - -emit-llvm | llc -filetype=obj -o t.o
$ otool -tv t.o
t.o:
(__TEXT,__text) section
_foo:
0000000000000000	subq	$0x08,%rsp
0000000000000004	movl	%edi,(%rsp)
0000000000000007	movl	%edi,%eax
0000000000000009	incl	%eax
000000000000000b	movl	%eax,(%rsp)
000000000000000e	movl	%eax,0x04(%rsp)
0000000000000012	addq	$0x08,%rsp
0000000000000016	ret

llvm-svn: 100492
 2010-04-05 23:15:42 +00:00
Chris Lattner
ecdad4bb0c eliminate the magic AbsoluteDebugSectionOffsets MAI hook, 
which is really a property of the section being referenced.
Add a predicate to MCSection to replace it.

Yay for reduction in magic.

llvm-svn: 100367
 2010-04-04 23:22:29 +00:00
Chris Lattner
2f1c065cef isAbsoluteEHSectionOffsets always returns false, eliminate it 
and substitute false at the one call site.

llvm-svn: 100354
 2010-04-04 21:29:44 +00:00
Chris Lattner
8fb6be1886 fix an ugly wart in the MCInstPrinter api where the 
raw_ostream to print an instruction to had to be specified
at MCInstPrinter construction time instead of being able
to pick at each call to printInstruction.

llvm-svn: 100307
 2010-04-04 05:04:31 +00:00
Chris Lattner
b6769a8513 add a twine form of MCStreamer::EmitRawText, and mc'ize 
a few more things in AsmPrinter.cpp.

llvm-svn: 100294
 2010-04-03 22:12:35 +00:00
Chris Lattner
fad8688f5d allow attaching comments to raw text. 
llvm-svn: 100292
 2010-04-03 22:06:56 +00:00
Chris Lattner
cf35bb049a add <cstdlib> header for abort() on linux builders. 
llvm-svn: 100290
 2010-04-03 21:48:59 +00:00
Chris Lattner
4e8e791414 add a new EmitInlineAsm function to asmprinter to handle inline asm. 
If we have an MCAsmStreamer, we continue to emit asm textually, 
otherwise we (currently) emit an error to errs and ignore it.

llvm-svn: 100289
 2010-04-03 21:35:55 +00:00
Chris Lattner
8e4cf6f425 Rip out the 'is temporary' nonsense from the MCContext interface to 
create symbols.  It is extremely error prone and a source of a lot
of the remaining integrated assembler bugs on x86-64.

This fixes rdar://7807601.

llvm-svn: 99902
 2010-03-30 18:10:53 +00:00
Daniel Dunbar
f2c7999cd8 MC/Mach-O/x86_64: Support @GOTPCREL on symbols, even for non-PCrel relocations! 
llvm-svn: 99853
 2010-03-29 23:56:40 +00:00
Daniel Dunbar
d04906b49e llvm-mc: Add a -mc-relax-all option, which relaxes every fixup. We always need 
exactly two passes in that case, and don't ever need to recompute any layout,
so this is a nice baseline for relaxation performance.

llvm-svn: 99563
 2010-03-25 22:49:09 +00:00
Daniel Dunbar
21e9834bc1 MC: Stop restarting layout on every relaxation. 
- Still O(N^2), just a faster form, and now its the MCAsmLayout's fault.

On the .s I am tuning against (combine.s from 403.gcc):
--
ddunbar@lordcrumb:MC$ diff stats-before.txt stats-after.txt
5,10c5,10
<    1728 assembler - Number of assembler layout and relaxation steps
<    7707 assembler - Number of emitted assembler fragments
<  120588 assembler - Number of emitted object file bytes
< 2233448 assembler - Number of evaluated fixups
<    1727 assembler - Number of relaxed instructions
< 6723845 mcexpr    - Number of MCExpr evaluations
---
>      3 assembler - Number of assembler layout and relaxation steps
>   7707 assembler - Number of emitted assembler fragments
> 120588 assembler - Number of emitted object file bytes
>  14796 assembler - Number of evaluated fixups
>   1727 assembler - Number of relaxed instructions
>  67889 mcexpr    - Number of MCExpr evaluations
--
Feel free to LOL at the -before numbers, if you like.

I am a little surprised we make more than 2 relaxation passes. It's pretty
trivial for us to do relaxation out-of-order if that would give a speedup.

llvm-svn: 99543
 2010-03-25 19:35:56 +00:00
Daniel Dunbar
4935edfb58 MC: Simplify main section layout process by moving alignment into LayoutSection. 
llvm-svn: 99529
 2010-03-25 18:16:42 +00:00
Daniel Dunbar
8d2b718d91 MC: Sink Section address assignment into LayoutSection. 
llvm-svn: 99528
 2010-03-25 18:16:38 +00:00
Daniel Dunbar
f793969cd1 MC/Mach-O: Switch to MCSectionData::getOrdinal. 
llvm-svn: 99504
 2010-03-25 08:08:54 +00:00
Daniel Dunbar
de3fc7d4d8 MC: Explicity track section and fragment ordinals. 
llvm-svn: 99500
 2010-03-25 07:10:11 +00:00
Daniel Dunbar
276acc64a9 Fix -Asserts warning. 
llvm-svn: 99499
 2010-03-25 07:10:05 +00:00
Daniel Dunbar
797b44b26c MC: Route access to SectionData offset and file size through MCAsmLayout. 
llvm-svn: 99474
 2010-03-25 02:00:07 +00:00
Daniel Dunbar
4b6b2a1a1f MC: Route access to Fragment offset and effective size through MCAsmLayout. 
llvm-svn: 99473
 2010-03-25 02:00:02 +00:00
Daniel Dunbar
70fbcbc1cd MC: Eliminate MC{Fragment,{Section,Symbol}Data}::getAddress. 
llvm-svn: 99467
 2010-03-25 01:03:24 +00:00
Daniel Dunbar
cfa1820a7e MC: Fix refacto in MCExpr evaluation, I mistakenly replaced a fragment address with a symbol address. 
- This fixes the integrated-as nightly test regressions.

llvm-svn: 99466
 2010-03-25 01:03:17 +00:00
Daniel Dunbar
3a79d30c6c MC: Direct all {fragment,section,symbol} address access through the MCAsmLayout object. 
llvm-svn: 99380
 2010-03-24 03:43:40 +00:00
Daniel Dunbar
0ce1e410cd MC: Sprinkle in some more interesting statistics. 
llvm-svn: 99350
 2010-03-23 23:47:14 +00:00
Daniel Dunbar
bd005bdfe9 llvm-mc: Fast path EvaluateAbsolute of constants. 
llvm-svn: 99348
 2010-03-23 23:47:07 +00:00
Daniel Dunbar
14c84e0c3b MC: Switch to using MCInst fragments to do relaxation. 
Also, both MCMachOStreamer and MCAssembler are now target independent!

llvm-svn: 99256
 2010-03-23 05:09:03 +00:00
Daniel Dunbar
47743ae59a MC: Add TargetAsmBackend::MayNeedRelaxation, for checking whether a particular instruction + fixups might need relaxation. 
llvm-svn: 99249
 2010-03-23 03:13:05 +00:00
Daniel Dunbar
b33d212057 MC: Add TargetAsmBackend::WriteNopData and use to eliminate some target dependencies in MCMachOStreamer and MCAssembler. 
llvm-svn: 99248
 2010-03-23 02:36:58 +00:00
Daniel Dunbar
ae8d914c58 MC: Tweak MCInstFragment to include the encoded data and fixups, so that we don't need to recompute them during relaxation. I will revisit this once all the other pieces of fast relaxation are in place. 
llvm-svn: 99244
 2010-03-23 01:39:05 +00:00
Jeffrey Yasskin
b9c181ea1a Put MCSectionCOFF::Name into the MCContext instead of leaking it. 
llvm-svn: 99231
 2010-03-22 23:26:12 +00:00
Daniel Dunbar
0f6983752f MC: Add MCInstFragment, not used yet. 
llvm-svn: 99229
 2010-03-22 23:16:48 +00:00
Daniel Dunbar
1836f73559 Add a FIXME. 
llvm-svn: 99228
 2010-03-22 23:16:43 +00:00
Daniel Dunbar
4b5c134c5b MC: Fix a few more cases we were passing an MCDataFragment when a MCFragment would do, and sprinkle in some const. 
llvm-svn: 99218
 2010-03-22 21:49:41 +00:00
Daniel Dunbar
a8a7a9b5aa Simplify. 
llvm-svn: 99217
 2010-03-22 21:49:38 +00:00
Daniel Dunbar
38fd48e06b MCInst: Add ::dump_pretty. 
llvm-svn: 99216
 2010-03-22 21:49:34 +00:00
Daniel Dunbar
6a91d2767b MC: Change MCObjectWriter::RecordRelocation to take an MCFragment (instead of a MCDataFragment). Object files should only need the generic MCFragment features. 
llvm-svn: 99205
 2010-03-22 20:35:50 +00:00
Daniel Dunbar
e7900757bd MC/Mach-O: Factor out getOrCreateDataFragment(). 
llvm-svn: 99204
 2010-03-22 20:35:46 +00:00
Daniel Dunbar
264c33a099 MC: Eliminate MCFragment::getMaxFileSize. 
llvm-svn: 99203
 2010-03-22 20:35:43 +00:00
Daniel Dunbar
6ea8fe65e7 MC: Share the MCAsmLayout object, although its still not used for anything important. 
llvm-svn: 99202
 2010-03-22 20:35:35 +00:00
Daniel Dunbar
6b3e18d2c4 Better fix for r98994, MachObjectWriterImpl wasn't intended to be virtual. 
llvm-svn: 99031
 2010-03-20 01:58:40 +00:00
Rafael Espindola
5b074c72ee Fix -Wnon-virtual-dtor warning. 
llvm-svn: 98994
 2010-03-19 21:26:46 +00:00
Daniel Dunbar
3c66c7a3c1 MC/Mach-O/x86_64: Add relocation support. 
- This is "extraordinarily" Darwin 'as' compatible. See the litany of FIXMEs littered about for more information.
 - There are a few cases which seem to clearly be 'as' bugs which I have left unsupported, and there is one cases where we diverge but should fix if it blocks diffing .o files (Darwin 'as' ends up widening a jump unnecessarily).
 - 403.gcc build, runs, and diffs equivalently to the 'as' built version now (using llvm-mc). However, it builds so slowly that I wouldn't recommend trying it quite yet. :)

llvm-svn: 98974
 2010-03-19 18:07:55 +00:00
Daniel Dunbar
c687bf7cb4 MC: Add TargetAsmBackend::createObjectWriter. 
- MCAssembler is now object-file independent, although we will surely need more work to fully support ELF/COFF.

llvm-svn: 98955
 2010-03-19 10:43:26 +00:00
Daniel Dunbar
7252b48af1 MCCodeEmitter: Add target independent fixup flag for is-pc-relative. 
llvm-svn: 98954
 2010-03-19 10:43:23 +00:00
Daniel Dunbar
c47468760e MC: Sink code emitter into MCAssembler. 
llvm-svn: 98953
 2010-03-19 10:43:18 +00:00
Daniel Dunbar
74330a6389 MC/Mach-O: Move to MachObjectWriter.{h,cpp}. 
llvm-svn: 98952
 2010-03-19 10:43:15 +00:00
Daniel Dunbar
287ff291e3 MC: Add TargetAsmBackend::isVirtualSection hook. 
llvm-svn: 98950
 2010-03-19 09:29:03 +00:00
Daniel Dunbar
c9bcbc86a8 MC: Split MCObjectWriter out of MCAssembler.cpp. 
llvm-svn: 98949
 2010-03-19 09:28:59 +00:00
Daniel Dunbar
1053342967 MCAssembler: Pull out MCObjectWriter class. 
llvm-svn: 98948
 2010-03-19 09:28:55 +00:00
Daniel Dunbar
3444d755d2 MCAssembler: Move ApplyFixup to the TargetAsmBackend, this is a target specific not object writer specific task. 
llvm-svn: 98947
 2010-03-19 09:28:12 +00:00
Daniel Dunbar
b2aafb5fe9 MC/Mach-O: Lift the fixup evaluation and application up (to the same place), and eliminate MCAsmFixup::FixedValue. 
llvm-svn: 98944
 2010-03-19 07:09:47 +00:00
Daniel Dunbar
01aca21857 MC/Mach-O: Factor out ExecutePostLayoutBinding, to separate the post-layout changes the object writer may need to make to the assembler from the actual .o writing. 
llvm-svn: 98943
 2010-03-19 07:09:33 +00:00
Daniel Dunbar
9fac4ed7f7 MC/Mach-O: Lift relocation emission logic a bit higher to separate evaluation / relocation handling from the actual .o writing. 
llvm-svn: 98942
 2010-03-19 07:09:18 +00:00
Chris Lattner
32452cf12f fix an MCInstPrinter leak that jyasskin pointed out: 
createAsmStreamer now takes ownership of the instprinter.

llvm-svn: 98939
 2010-03-19 05:48:53 +00:00
Daniel Dunbar
d2393ccdad MC/Mach-O: Add isScatteredFixupFullyResolved, which implements the correct algorithm (used on x86_64) for determining whether an evaluated fixup is fully resolved (doesn't need relocation). 
- Test cases will follow, once we have x86_64 relocation support.

llvm-svn: 98926
 2010-03-19 03:18:18 +00:00
Daniel Dunbar
0a3b893a3e MC/Mach-O/x86_64: Add getAtom[ForAddress]. 
- These find the defining symbol which identifies the containing atom for a symbol or address. They are currently very slow, but will be eliminated eventually.

llvm-svn: 98925
 2010-03-19 03:18:15 +00:00
Daniel Dunbar
f8e4be91ff MC/Mach-O: Factor out isScatteredFixupFullyResolvedSimple predicate, and fix some corner cases. 
llvm-svn: 98924
 2010-03-19 03:18:12 +00:00
Daniel Dunbar
377fb36813 MC/Mach-O: Factor out isSymbolLinkerVisible method; "linker visible" is a made up term to refer to non-temporary labels + temporary labels in sections-which-require symbols. For Darwin, it corresponds to symbols which effectively define an atom. 
llvm-svn: 98923
 2010-03-19 03:18:09 +00:00
Daniel Dunbar
8b149ce7fd MCValue: Change to holding MCSymbolRefExprs instead of MCSymbols, we will need this for accessing to symbol modifiers. 
llvm-svn: 98791
 2010-03-18 00:59:10 +00:00
Daniel Dunbar
26cbc4b1a3 MC/Darwin: Add a new target hook for whether the target uses "reliable" symbol differences, basically whether the assembler should attempt to understand atoms when using scattered symbols. 
Also, avoid some virtual call overhead.

llvm-svn: 98789
 2010-03-18 00:58:53 +00:00
Chris Lattner
962d3d700b fix GetOrCreateTemporarySymbol to require a name, clients 
should use CreateTempSymbol() if they don't care about the
name.

llvm-svn: 98712
 2010-03-17 05:41:18 +00:00
Daniel Dunbar
241d3cb048 MC: Allow modifiers in MCSymbolRefExpr, and eliminate X86MCTargetExpr. 
- Although it would be nice to allow this decoupling, the assembler needs to be able to reason about MCSymbolRefExprs in too many places to make this viable. We can use a target specific encoding of the variant if this becomes an issue.
 - This patch also extends llvm-mc to support parsing of the modifiers, as opposed to lumping them in with the symbol.

llvm-svn: 98592
 2010-03-15 23:51:06 +00:00
Daniel Dunbar
476b525e01 MC/Mach-O/x86_64: Temporary labels in cstring sections require symbols (and external relocations, but we don't have x86_64 relocations yet). 
llvm-svn: 98583
 2010-03-15 21:56:50 +00:00
Daniel Dunbar
27eab8e4f7 MC/Mach-O: Add MCSectionMachO::getType() 
llvm-svn: 98582
 2010-03-15 21:56:38 +00:00
Chris Lattner
1b10191d18 fix a memory leak yjasskin pointed out: MCSymbol is bump pointer 
allocated and thus not freed.  This is cool except that it contains
and std::string so the string data didn't get freed.  In any case
there is no reason to redundantly store the string data in the 
MCSymbol anyway, just make the MCSymbol ref the string data in the
MCContext StringMap.

llvm-svn: 98536
 2010-03-15 06:15:35 +00:00
Chris Lattner
3eb55835b5 add a new CreateTempSymbol method, the use case for 
CreateTempSymbol vs GetOrCreateTemporarySymbol are
completely different.

llvm-svn: 98486
 2010-03-14 08:23:30 +00:00
Daniel Dunbar
03a9f8588c MC: Fix a crash on invalid, attempting to evaluate undefined symbols. 
llvm-svn: 98464
 2010-03-14 03:10:40 +00:00
Daniel Dunbar
eb158a88db MC/X86_64: Symbol support. 
llvm-svn: 98456
 2010-03-13 22:49:35 +00:00
Daniel Dunbar
fec15da5d7 MC/Mach-O: Initial x86_64 support. 
llvm-svn: 98454
 2010-03-13 22:10:17 +00:00
Chris Lattner
58097a4b82 add a hack to allow parsing negative minint. rdar://7751341 
llvm-svn: 98442
 2010-03-13 19:25:13 +00:00
Daniel Dunbar
e8b67adb94 MC/Mach-O: PCrel relocations weren't using the right base address, they are 
relative to the fragment address, not its offset. This was masked by the text
section normally being at address 0.

llvm-svn: 98420
 2010-03-13 02:38:00 +00:00
Daniel Dunbar
33c92a1a88 llvm-mc: Support -n, useful for comparing -integrated-as output since the 
compiler may not lead with the text section.

llvm-svn: 98418
 2010-03-13 02:20:57 +00:00
Daniel Dunbar
8ad9589475 MC/Mach-O: Implement initial support for relaxation. 
- The implementation is currently very brain dead and inefficient, but I have a
   clear plan on how to fix it.

 - The good news is, it works and correctly assembles 403.gcc (when built with
   Clang, at '-Os', '-Os -g', and '-O3'). Even better, at '-Os' and '-Os -g',
   the resulting binary is exactly equivalent to that when built with the system
   assembler. So it probably works! :)

llvm-svn: 98396
 2010-03-12 22:07:14 +00:00
Chris Lattner
ff05ae7a33 move fastcall/stdcall mangling up into Mangler. 
llvm-svn: 98384
 2010-03-12 21:03:47 +00:00
Daniel Dunbar
642fbbe84d MC: Factor out MCAssembler::EvaluateFixup, and simplify. 
llvm-svn: 98381
 2010-03-12 21:00:49 +00:00
Daniel Dunbar
14b9ff70e1 MC: Constify MCAsmLayout argument to MCExpr::EvaluteAs... 
llvm-svn: 98380
 2010-03-12 21:00:45 +00:00
Daniel Dunbar
71473e6b15 MC: Add MCAssembler::addFixup, which enforces that fixups are added in order. 
llvm-svn: 98379
 2010-03-12 21:00:38 +00:00
Chris Lattner
f4dce6a6d8 remove MAI argument from createAsmStreamer since it 
can get it from the context now.

llvm-svn: 98361
 2010-03-12 18:28:53 +00:00
Chris Lattner
de47dfab1d enhance MCContext::GetOrCreateTemporarySymbol() to create a new symbol 
with an arbitrary unique name.

llvm-svn: 98294
 2010-03-11 22:56:10 +00:00
Chris Lattner
debc026df2 change MCContext to always have an MCAsmInfo. 
llvm-svn: 98293
 2010-03-11 22:53:35 +00:00
Chris Lattner
8fc3ad6384 empty symbols aren't possible, the mcsymbol ctor aborts on them. 
llvm-svn: 98288
 2010-03-11 21:38:58 +00:00
Daniel Dunbar
8790f4ce4b MC/Mach-O: Add MCSymbolData::getAddress() utility. 
llvm-svn: 98266
 2010-03-11 18:22:51 +00:00
Daniel Dunbar
ee26fc9e9f MC/Mach-O: Implement "absolutizing" semantics of .set, by evaluating the assembly time value of variables. 
llvm-svn: 98241
 2010-03-11 05:53:37 +00:00
Daniel Dunbar
aefde2abfd MC/Mach-O: Start passing in the basic MCAsmLayout object. 
- Also, drop the current location part of AsmLayout, I think I prefer to implement this via explicit symbols.

llvm-svn: 98240
 2010-03-11 05:53:33 +00:00
Daniel Dunbar
285a34c8c8 MC: Sketch initial MCAsmLayout class, which encapsulates the current layout of an assembly file. The MCAsmLayout is also available for use by MCExpr::EvaluateAs{Absolute,Relocatable}, to allow target specific hooks and "absolutizing" of symbols. 
llvm-svn: 98227
 2010-03-11 02:28:59 +00:00
Daniel Dunbar
687d99cfa8 MC: Provide MCAssembler with a TargetAsmBackend. 
llvm-svn: 98222
 2010-03-11 01:34:27 +00:00
Daniel Dunbar
a1827f9853 MC/Mach-O: Use the MCAssembler symbol map instead of reconstructing. 
llvm-svn: 98187
 2010-03-10 20:58:31 +00:00
Daniel Dunbar
fc99f844eb MC: Move the backend section and symbol data maps to MCAssembler. 
llvm-svn: 98186
 2010-03-10 20:58:29 +00:00
Daniel Dunbar
8f981447a6 Remove unneeded includes. 
llvm-svn: 98167
 2010-03-10 17:56:05 +00:00
Chris Lattner
e34dde1e83 move three lowering hooks from MAI to TLOF and make one of them 
semantic instead of syntactic.  This completes MCization of
darwin/x86[-64]!

llvm-svn: 98145
 2010-03-10 07:20:42 +00:00
Chris Lattner
ed0b8d36e4 set the temporary bit on MCSymbols correctly. 
llvm-svn: 98124
 2010-03-10 02:25:11 +00:00
Daniel Dunbar
54df3cead6 MC/Mach-O: Resolve a FIXME; these relocation types are no longer semanticaly different. 
llvm-svn: 98120
 2010-03-10 02:10:29 +00:00
Chris Lattner
554f323da8 eliminate MCContext::CreateSymbol and CreateTemporarySymbol. 
Add a new GetOrCreateTemporarySymbol method and a version that
takes a twine.

llvm-svn: 98118
 2010-03-10 01:29:27 +00:00
Daniel Dunbar
14b4e621b0 MC/Mach-O: Use the SECTDIFF relocation type for (A - B + constant) where A is external. 
- I'm not sure why, but this is what 'as' does.

llvm-svn: 98115
 2010-03-10 00:58:25 +00:00
Chris Lattner
13cbdb1549 make the NullStreamer set the section on a label when emitted so that isDefined() works. 
llvm-svn: 98100
 2010-03-09 23:12:18 +00:00
Daniel Dunbar
f33a8c5ab6 MC/Mach-O: For PCrel relocations, we need to compensate for the PCrel adjustment when determining if we need a scattered relocation. 
llvm-svn: 98082
 2010-03-09 21:27:58 +00:00
Daniel Dunbar
94ed4ba5e0 MC/Mach-O: Also set the PCrel bit in the second half of paired relocation entries. 
llvm-svn: 98081
 2010-03-09 21:27:47 +00:00
Daniel Dunbar
90e934ff65 MC/Mach-O: Don't generate relocations for PCrel fixups to local labels. 
llvm-svn: 98080
 2010-03-09 21:27:30 +00:00
Daniel Dunbar
8e3e2688b5 MC/Mach-O: Tweak .dump() formatting. 
llvm-svn: 98028
 2010-03-09 01:12:23 +00:00
Daniel Dunbar
e3986eb967 MC/Mach-O: Don't adjust section sizes when aligning zero fill sections, just pad the address. 
llvm-svn: 98027
 2010-03-09 01:12:20 +00:00
Chris Lattner
8147c144d9 add a EmitSymbolValue convenience method to MCStreamer. 
llvm-svn: 98017
 2010-03-09 00:39:24 +00:00
Daniel Dunbar
42f1b1b255 MC/Macho-O: Align the zerofill section itself to the maximum alignment. 
llvm-svn: 97991
 2010-03-08 22:03:42 +00:00
Daniel Dunbar
3292ad448b MC/Mach-O: Fix address compution for zero fill sections. 
llvm-svn: 97984
 2010-03-08 21:10:42 +00:00
Daniel Dunbar
ea24e77d30 MC/Mach-O: Error out instead of crashing on invalid scattered relocation expressions. 
llvm-svn: 97983
 2010-03-08 21:10:39 +00:00
Chris Lattner
2a0ccfc916 pass in more section kinds, enough to get the .align 0x90 
stuff to emit optimal nops in the right places.

llvm-svn: 97233
 2010-02-26 18:32:26 +00:00
Kevin Enderby
11cce486ac This is a patch to the assembler frontend to detect when aligning a text 
section with TextAlignFillValue and calls EmitCodeAlignment() instead of
calling EmitValueToAlignment().  This allows x86 assembly code to be aligned
with optimal nops.

llvm-svn: 97158
 2010-02-25 18:46:04 +00:00
Kevin Enderby
69d643ba20 This is the second patch to allow x86 code to be aligned with optimal nops. 
With the compiler changed to use EmitCodeAlignment() it does change the
functionality.  But X86 assembly code assembled with llvm-mc does not change
its output.  For that we will eventually change the assembler frontend to
detect a '.align x, 0x90' when used in a section that 'hasInstructions' and use
EmitCodeAlignment, but will wait until we have better target hooks.

llvm-svn: 96988
 2010-02-23 21:41:24 +00:00
Chris Lattner
405e4a1d63 genericize MCAsmStreamer::EmitCodeAlignment to support other targets 
so that it doesn't break them when the code generator starts using it.

llvm-svn: 96966
 2010-02-23 18:44:31 +00:00
Kevin Enderby
c11390f758 This is the first patch to put the needed bits in place to eventually allow code 
to be aligned with optimal nops.  This patch does not change any functionality
and when the compiler is changed to use EmitCodeAlignment() it should also not
change the resulting output.  Once the compiler change is made and everything
looks good the next patch with the table of optimal X86 nops will be added to
WriteNopData() changing the output.  There are many FIXMEs in this patch which
will be removed when we have better target hooks (coming soon I hear).

llvm-svn: 96963
 2010-02-23 18:26:34 +00:00
Daniel Dunbar
2097684f80 MC/Mach-O: Remove non-sensical comment, and add a missing AddValueSymbols call. 
llvm-svn: 96809
 2010-02-22 22:08:57 +00:00
Daniel Dunbar
a6d1ef6ee9 MC/X86: Add stub AsmBackend. 
llvm-svn: 96763
 2010-02-21 21:54:14 +00:00
Daniel Dunbar
b6b58bff88 MC: Sketch registry support for target specific assembler backends. 
llvm-svn: 96762
 2010-02-21 21:53:53 +00:00
Daniel Dunbar
2f311d34fb MC/Mach-O: Update fixup values for change to X86 offsets. 
llvm-svn: 96532
 2010-02-17 23:45:16 +00:00
Duncan Sands
e2bc75b41e Pacify gcc-4.5, which warns (correctly) that these switches have 
cases that are not part of the enum.

llvm-svn: 96477
 2010-02-17 14:52:22 +00:00
Daniel Dunbar
e6679afaa7 MCAssembler: Fix pcrel relocations. Oh and, 
--
ddunbar@ozzy:tmp$ clang -m32 -integrated-as hello.c && ./a.out
hello world!
--

llvm-svn: 96096
 2010-02-13 09:45:59 +00:00
Daniel Dunbar
c05a38a3d3 MC/Mach-O: Start emitting fixups/relocations for instructions. 
llvm-svn: 96095
 2010-02-13 09:29:02 +00:00
Daniel Dunbar
7a1fd21459 MCAssembler: Switch MCAsmFixup to storing MCFixupKind instead of just a size. 
llvm-svn: 96094
 2010-02-13 09:28:54 +00:00
Daniel Dunbar
8e9044353a MCAssembler: Sink fixup list into MCDataFragment. 
llvm-svn: 96093
 2010-02-13 09:28:43 +00:00
Daniel Dunbar
95ae012b0e MCAssembler: Switch MCFillFragment to only taking constant values. Symbolic expressions can always be emitted as data + fixups. 
llvm-svn: 96092
 2010-02-13 09:28:32 +00:00
Daniel Dunbar
cc282ba52e MC/Mach-O: Implement EmitValue using data fragments + fixups instead of fill fragment. 
llvm-svn: 96091
 2010-02-13 09:28:22 +00:00
Daniel Dunbar
481e926468 MCAssembler: Start applying fixups in the data section. 
llvm-svn: 96090
 2010-02-13 09:28:15 +00:00
Daniel Dunbar
a699e834fb MCAssembler: Add assorted dump() methods. 
llvm-svn: 96089
 2010-02-13 09:28:03 +00:00
Daniel Dunbar
09733841aa MC/AsmParser: Attempt to constant fold expressions up-front. This ensures we avoid fixups for obvious cases like '-(16)'. 
llvm-svn: 96064
 2010-02-13 01:28:07 +00:00
Chris Lattner
144a1b7a24 add a new MCInstPrinter::getOpcodeName interface, when it is 
implemented, llvm-mc --show-inst now uses it to print the
instruction opcode as well as the number.

llvm-svn: 95929
 2010-02-11 22:39:10 +00:00