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Author SHA1 Message Date
Owen Anderson c4126a1a2c Add tests for NEON encoding of vshll. 
llvm-svn: 117399
 2010-10-26 21:21:47 +00:00
Owen Anderson 0fbb20769f Tests for NEON encoding of vshr. 
llvm-svn: 117396
 2010-10-26 21:08:42 +00:00
Owen Anderson 3665fee8de Provide correct NEON encodings for vshl, register and immediate forms. 
llvm-svn: 117394
 2010-10-26 20:56:57 +00:00
Rafael Espindola c9fb35e73b Add support for .ident. 
llvm-svn: 117389
 2010-10-26 19:35:47 +00:00
Owen Anderson db192ba90f Tests for NEON encoding of vrecpe, vrecps, vrsqrte, and vsqrts. 
llvm-svn: 117385
 2010-10-26 18:43:13 +00:00
Owen Anderson b3bcf529fc Tests for NEON encodings of vpmin and vpmax. 
llvm-svn: 117382
 2010-10-26 18:31:47 +00:00
Owen Anderson 691ce68d3c Add correct NEON encoding for vpadal. 
llvm-svn: 117380
 2010-10-26 18:18:03 +00:00
Owen Anderson 035b3261ee Tests for NEON encoding of vpadd and vpaddl. 
llvm-svn: 117377
 2010-10-26 18:04:51 +00:00
Owen Anderson 284cb361d1 Add NEON encodings for vmov and vmvn of immediates. 
llvm-svn: 117374
 2010-10-26 17:40:54 +00:00
Rafael Espindola e8ae98817a Implement some relaxations for arithmetic instructions. The limitation 
on RIP relative relocations looks artificial, but this is a superset of
what we were able to do before.

llvm-svn: 117364
 2010-10-26 14:09:12 +00:00
Bob Wilson e1961fe289 When the "true" and "false" blocks of a diamond if-conversion are the same, 
do not double-count the duplicate instructions by counting once from the
beginning and again from the end.  Keep track of where the duplicates from
the beginning ended and don't go past that point when counting duplicates
at the end.  Radar 8589805.

This change causes one of the MC/ARM/simple-fp-encoding tests to produce
different (better!) code without the vmovne instruction being tested.
I changed the test to produce vmovne and vmoveq instructions but moving
between register files in the opposite direction.  That's not quite the same
but predicated versions of those instructions weren't being tested before,
so at least the test coverage is not any worse, just different.

llvm-svn: 117333
 2010-10-26 00:02:24 +00:00
Owen Anderson c0f777afbf Tests for NEON encoding of vmax. 
llvm-svn: 117327
 2010-10-25 23:45:34 +00:00
Owen Anderson 144c3f8c6a Tests for NEON encoding of vmin. 
llvm-svn: 117326
 2010-10-25 23:35:36 +00:00
Owen Anderson 1f6aad053d Add correct encodings for NEON vabal. 
llvm-svn: 117315
 2010-10-25 21:29:04 +00:00
Owen Anderson b9c91679aa Add correct NEON encodings for vaba. 
llvm-svn: 117309
 2010-10-25 20:52:57 +00:00
Owen Anderson 12214ddaa3 Tests for NEON encoding of vabdl. 
llvm-svn: 117303
 2010-10-25 20:36:28 +00:00
Owen Anderson 64aa05f865 Add tests for NEON encoding of vabd. 
llvm-svn: 117302
 2010-10-25 20:29:27 +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
Daniel Dunbar 95db1cc022 tweak test. 
llvm-svn: 117297
 2010-10-25 20:18:49 +00:00
Daniel Dunbar 0c193ca626 MC/AsmParser: Rewrite test to actually check some parts of expression parsing, 
now that we have macros and friends. Uncovered a bug in macro expansion...

llvm-svn: 117295
 2010-10-25 20:18:41 +00:00
Owen Anderson dd001b89d7 Attempt to provide correct encodings for NEON vbit and vbif, even though we can't test them at the moment. 
llvm-svn: 117294
 2010-10-25 20:17:22 +00:00
Owen Anderson dea09c7564 Provide correct NEON encodings for vbsl. 
llvm-svn: 117293
 2010-10-25 20:13:13 +00:00
Owen Anderson 2477446ee5 Add correct instruction encodings for vbic, vorn, and vmvn. 
llvm-svn: 117282
 2010-10-25 18:43:52 +00:00
Owen Anderson dff239c5f9 Provide correct NEON encodings for vand, veor, and vorr. 
llvm-svn: 117279
 2010-10-25 18:28:30 +00:00
Owen Anderson d9cdda9ddc Add tests for NEON encoding of vtst. 
llvm-svn: 117277
 2010-10-25 18:10:34 +00:00
Owen Anderson feb3ee0c93 Add NEON encoding tests for vcgt and vacgt. 
llvm-svn: 117276
 2010-10-25 18:03:59 +00:00
Owen Anderson e5d0677173 Add tests for NEON encodings of vcge and vacge. 
llvm-svn: 117274
 2010-10-25 17:49:32 +00:00
Owen Anderson c178b80f65 Add a warning about our inability to test the encoding of vceq with immediate zero. 
llvm-svn: 117273
 2010-10-25 17:33:02 +00:00
Owen Anderson 02917f5b1b Add tests for NEON encoding of vceq. 
llvm-svn: 117270
 2010-10-25 17:20:26 +00:00
Owen Anderson a9ad6c0645 Add tests for NEON encoding of vsubhn and vrsubhn. 
llvm-svn: 117269
 2010-10-25 17:12:46 +00:00
Owen Anderson 358900d569 Add tests for NEON encoding of vqsub. 
llvm-svn: 117214
 2010-10-23 18:02:16 +00:00
Owen Anderson 92644efaf8 Add tests for NEON encoding of vhsub. 
llvm-svn: 117189
 2010-10-22 23:58:22 +00:00
Jim Grosbach 0ce06c08fb Add a CMP test. 
llvm-svn: 117187
 2010-10-22 23:48:01 +00:00
Owen Anderson f4e1a09d38 Add tests for NEON encoding of vsubw. 
llvm-svn: 117186
 2010-10-22 23:46:07 +00:00
Owen Anderson 9ef5c507ce Add tests for NEON encoding of vsubl. 
llvm-svn: 117183
 2010-10-22 23:36:36 +00:00
Owen Anderson c372775cc8 Add tests for NEON encoding of vsub. 
llvm-svn: 117177
 2010-10-22 23:21:04 +00:00
Owen Anderson cb5c1b75fe Add tests for NEON encoding of vqdmlsl. 
llvm-svn: 117173
 2010-10-22 23:08:47 +00:00
Owen Anderson d655a80774 Add tests for NEON encoding of vmlsl. 
llvm-svn: 117171
 2010-10-22 23:02:27 +00:00
Jim Grosbach b40a60fa2f tidy up. 
llvm-svn: 117166
 2010-10-22 22:15:48 +00:00
Jim Grosbach 2c9ae05c67 ARM mode encoding information for CLZ, RBIT, REV*, and PKH*. 
llvm-svn: 117165
 2010-10-22 22:12:16 +00:00
Owen Anderson 3c4f72c9f8 Add tests for the correct encoding of NEON vmls. 
llvm-svn: 117145
 2010-10-22 20:31:24 +00:00
Owen Anderson 9d0122af7d Add correct NEON encodings for vqdmlal. 
llvm-svn: 117134
 2010-10-22 19:35:48 +00:00
Jim Grosbach 2b80543fc2 Add the encoding information for the rest of the ARM mode multiply instructions. 
llvm-svn: 117133
 2010-10-22 19:15:30 +00:00
Owen Anderson 3d0264667f Provide correct encodings for NEON vmlal. 
llvm-svn: 117131
 2010-10-22 19:05:25 +00:00
Owen Anderson f48719f1b5 Provide correct NEON encodings for vmla. 
llvm-svn: 117126
 2010-10-22 18:54:37 +00:00
Jim Grosbach 6956a60563 More ARM multiply instuction binary encodings. 
llvm-svn: 117121
 2010-10-22 18:35:16 +00:00
Owen Anderson f6659997a1 Add testscases for encoding of NEON vdqmull. 
llvm-svn: 117115
 2010-10-22 17:57:37 +00:00
Jim Grosbach 22261600a8 More ARM multiply instruction encoding information. 
llvm-svn: 117108
 2010-10-22 17:16:17 +00:00
Andrew Trick edd006c1c3 Reverting r117031 to cleanup valgrind errors. 
It doesn't look like anything is wrong with the checkin,
but the new test cases expose a mem bug in AsmParser.

llvm-svn: 117087
 2010-10-22 03:58:29 +00:00
Sean Callanan 9f6c622f88 Fixed handling of immediate operand sizes, which 
weren't properly reflecting the OperandSize attribute
of the instruction leading to improper decoding of
certain instructions with the 66H prefix.  Also added
a test case for this.

llvm-svn: 117084
 2010-10-22 01:24:11 +00:00
Owen Anderson 28418de7ee Add tests for NEON encoding of vmull. 
llvm-svn: 117077
 2010-10-21 22:19:53 +00:00
Jim Grosbach a97becfaac ARM binary encodings for MVN variants. 
llvm-svn: 117076
 2010-10-21 22:19:32 +00:00
Owen Anderson 22c940c9ab Add tests for NEON encoding of vqdmulh and vqrdmulh. 
llvm-svn: 117074
 2010-10-21 22:05:33 +00:00
Jim Grosbach 5edb03ee57 ARM Binary encoding information for BFC/BFI instructions. 
llvm-svn: 117072
 2010-10-21 22:03:21 +00:00
Owen Anderson eff79f13a6 Add tests for NEON vmul encoding. 
llvm-svn: 117069
 2010-10-21 21:51:58 +00:00
Owen Anderson 6e1cf114f9 Rename this test to better reflect its contents. 
llvm-svn: 117067
 2010-10-21 21:40:15 +00:00
Owen Anderson c47913acd2 Add tests for NEON encodings of vaddhn and vraddhn. 
llvm-svn: 117064
 2010-10-21 20:56:57 +00:00
Owen Anderson d8be664273 Add tests for NEON encodings of vqadd, which was already correctly encoded. 
llvm-svn: 117059
 2010-10-21 20:42:04 +00:00
Owen Anderson 6b7e401049 Add correct NEON encodings for vhadd and vrhadd. 
llvm-svn: 117047
 2010-10-21 18:55:04 +00:00
Owen Anderson 9561084188 Add correct encodings for NEON vaddw.s* and vaddw.u*. 
llvm-svn: 117040
 2010-10-21 18:20:25 +00:00
Owen Anderson 15c97706e8 Provide correct NEON encodings for vaddl.u* and vaddl.s*. 
llvm-svn: 117039
 2010-10-21 18:09:17 +00:00
Rafael Espindola 8ba86f801d Do not recurse into symbol refs that have a variant kind. This prevents us 
from losing the variant when producing a relocation on an alias.

llvm-svn: 117037
 2010-10-21 18:00:20 +00:00
Kevin Enderby 0138a05557 More tweaks to X86 instructions to allow the 'w' suffix in places it makes 
sense, when the instruction takes the 16-bit ax register or m16 memory
location.  These changes to llvm-mc matches what the darwin assembler allows
for these instructions.  Also added the missing flex (without the wait prefix)
and ud2a as an alias to ud2 (still to add ud2b).

llvm-svn: 117031
 2010-10-21 17:16:46 +00:00
Bill Wendling 2a7d269a2b Fix whitespace. 
llvm-svn: 117002
 2010-10-21 06:25:08 +00:00
Andrew Trick f4ebec03e0 putback r116983 and fix simple-fp-encoding.ll tests 
llvm-svn: 116992
 2010-10-21 03:40:16 +00:00
Owen Anderson 6083502848 Implement correct encodings for NEON vadd, both integer and floating point. 
llvm-svn: 116981
 2010-10-21 00:48:00 +00:00
Bill Wendling a65f914bb0 Add encoding for moving a value between two ARM core registers and a doublework 
extension register.

llvm-svn: 116970
 2010-10-20 23:37:40 +00:00
Bill Wendling 058190507b Add encodings for movement between ARM core registers and single-precision 
registers.

llvm-svn: 116961
 2010-10-20 22:44:54 +00:00
Rafael Espindola 89f6613e76 Handle _GLOBAL_OFFSET_TABLE_ correctly. 
llvm-svn: 116932
 2010-10-20 16:46:08 +00:00
Jason W Kim e8b3711ae9 Fixing r116753 r116756 r116777 
The failures in r116753 r116756 were caused by a python issue -
Python likes to append 'L' suffix to stringified numbers if the number
is larger than a machine int. Unfortunately, this causes a divergence of
behavior between 32 and 64 bit python versions.

I re-crafted elf-dump/common_dump to take care of these issues by:

1. always printing 0x (makes for easy sed/regex)
2. always print fixed length (exactly 2 + numBits/4 digits long)
   by mod ((2^numBits) - 1)
3. left-padded with '0'

There is a residual common routine that is also used by
macho-dump (dataToHex) , so I left the 'section_data' test values alone.

llvm-svn: 116823
 2010-10-19 17:39:10 +00:00
Eric Christopher eac5e381cc Speculatively revert 116753 and 116756 to attempt to fix the bots. 
llvm-svn: 116777
 2010-10-19 00:19:49 +00:00
Kevin Enderby 49843c0162 Added a few tweaks to the Intel Descriptor-table support instructions to allow 
word forms and suffixed versions to match the darwin assembler in 32-bit and
64-bit modes.  This is again for use just with assembly source for llvm-mc .

llvm-svn: 116773
 2010-10-19 00:01:44 +00:00
Jason W Kim eae048885d Changed elf-dump to output hex format by default. 
Also updated tests. 

llvm-svn: 116753
 2010-10-18 21:32:41 +00:00
Rafael Espindola fba9f74932 Implement R_386_GOT32. 
llvm-svn: 116744
 2010-10-18 20:47:21 +00:00
Rafael Espindola 0a5314fdb3 Relocate with .bss instead of using the symbol. Matches gas behavior. 
llvm-svn: 116741
 2010-10-18 20:25:33 +00:00
Rafael Espindola e3dc9e2ea1 Produce ELF::R_386_GOTPC relocations. 
llvm-svn: 116728
 2010-10-18 18:36:12 +00:00
Kevin Enderby b9783dd9bc Added a handful of x86-32 instructions that were missing so that llvm-mc would 
be more complete.  These are only expected to be used by llvm-mc with assembly
source so there is no pattern, [], in the .td files.  Most are being added to
X86InstrInfo.td as Chris suggested and only comments about register uses are
added.  Suggestions welcome on the .td changes as I'm not sure on every detail
of the x86 records.  More missing instructions will be coming.

llvm-svn: 116716
 2010-10-18 17:04:36 +00:00
Rafael Espindola 3521f8467d Produce a R_386_PLT32 when needed. Moved the default cases of switches to the 
start for consistency.

llvm-svn: 116715
 2010-10-18 16:58:03 +00:00
Rafael Espindola 4464e0858f Handle GOTOFF correctly on i386. 
llvm-svn: 116711
 2010-10-18 16:38:04 +00:00
Rafael Espindola 4262a22225 Add a MCObjectFormat class so that code common to all targets that use a 
single object format can be shared.

This also adds support for

mov zed+(bar-foo), %eax

on ELF and COFF targets.

llvm-svn: 116675
 2010-10-16 18:23:53 +00:00
Benjamin Kramer 0d14b5b0fa Unbreak test on non-COFF targets. 
llvm-svn: 116669
 2010-10-16 11:27:13 +00:00
Michael J. Spencer 17990d5690 MC-COFF: Add support for default-null weak externals. 
llvm-svn: 116666
 2010-10-16 08:25:57 +00:00
Jim Grosbach 68a335e185 ARM mode encoding information for UBFX and SBFX instructions. 
llvm-svn: 116588
 2010-10-15 17:15:16 +00:00
Rafael Espindola fbcf0db7ee Refactor code a bit and avoid creating unnecessary entries in the string 
map.

llvm-svn: 116579
 2010-10-15 15:39:06 +00:00
Bob Wilson 59351844e1 ARM instructions that are both predicated and set the condition codes 
have been printed with the "S" modifier after the predicate.  With ARM's
unified syntax, they are supposed to go in the other order.  We fixed this
for Thumb when we switched to unified syntax but missed changing it for
ARM.  Apparently we don't generate these instructions often because no one
noticed until now.  Thanks to Bill Wendling for the testcase!

llvm-svn: 116563
 2010-10-15 03:23:44 +00:00
Jim Grosbach 0b5c743811 Simplify test file a bit. 
llvm-svn: 116540
 2010-10-14 23:32:44 +00:00
Jim Grosbach 89efff3763 Add testcase for RRX and ASRS (which effectively tests MOVs, since those 
are just forms of that instruction).

llvm-svn: 116538
 2010-10-14 23:29:18 +00:00
Jim Grosbach eafcb27ded MOVi16 and MOVT ARM mode encodings. 
llvm-svn: 116498
 2010-10-14 18:54:27 +00:00
Rafael Espindola bee6e9f8e0 Remove some code duplication. 
llvm-svn: 116484
 2010-10-14 16:34:44 +00:00
Bill Wendling 6f52f8a87d Add support for vmov.f64/.f32 encoding. There's a bit of a hack going on 
here. The f32 in FCONSTS is handled as a double instead of a float in the
code. So the encoding of the immediate into the instruction isn't exactly in
line with the documentation in that regard. But given that we know it's handled
as a double, it doesn't cause any harm.

llvm-svn: 116471
 2010-10-14 02:33:26 +00:00
Bill Wendling 0441c6cba0 Add encoding for 'fmstat'. 
llvm-svn: 116466
 2010-10-14 01:19:34 +00:00
Bill Wendling 0825f3e441 - Add encodings for multiply add/subtract instructions in all their glory. 
- Add missing patterns for some multiply add/subtract instructions.
- Add encodings for VMRS and VMSR.

llvm-svn: 116464
 2010-10-14 01:02:08 +00:00
Jim Grosbach 7e72ec6626 Refactor the ARM 'setend' instruction pattern. Use a single instruction pattern 
and handle the operand explicitly. Flesh out encoding information. Add an
explicit disassembler testcase for the instruction.

llvm-svn: 116432
 2010-10-13 21:00:04 +00:00
Bill Wendling f106ecfa59 Add MC encodings for VCVT* instrunctions. 
llvm-svn: 116431
 2010-10-13 20:58:46 +00:00
Jim Grosbach 1e7db68774 Add ARM mode encoding for [SU]XT[BH] and [SU]XTA[BH] instructions. 
llvm-svn: 116421
 2010-10-13 19:56:10 +00:00
Jim Grosbach 651dc7c9e9 Add ARM mode operand encoding information for ADDE/SUBE instructions. 
llvm-svn: 116412
 2010-10-13 18:00:52 +00:00
Bill Wendling 6e27b4f530 Add encodings for VNEG and VSQRT. Also add encodings for VMOV, but not a test 
just yet.

llvm-svn: 116386
 2010-10-13 01:17:33 +00:00
Bill Wendling 576fd0b110 Add encodings for VCVT instructions. 
llvm-svn: 116385
 2010-10-13 00:56:35 +00:00
Jim Grosbach 8c519c0d4b Add ARM encoding information for comparisons, forced-cc-out arithmetics, and 
arithmetic-with-carry-in instructions.

llvm-svn: 116384
 2010-10-13 00:50:27 +00:00
Bill Wendling da4ddf0fcf Add VCMPZ and VABS. 
llvm-svn: 116383
 2010-10-13 00:38:07 +00:00
Bill Wendling f9ca535495 Refactor VCMP instructions. 
llvm-svn: 116379
 2010-10-13 00:04:29 +00:00
Bill Wendling 7dd8c0b991 Add encodings for VNMUL[SD]. 
llvm-svn: 116375
 2010-10-12 23:47:37 +00:00
Bill Wendling a06aee826c Add encodings for VDIV and VMUL. 
llvm-svn: 116370
 2010-10-12 23:22:27 +00:00
Jim Grosbach d5f8c3350d Be nitpicky and line up the comments. 
llvm-svn: 116365
 2010-10-12 23:14:03 +00:00
Bill Wendling 646a506724 Add encoding for VSUB and VCMP. 
Fear not! I'm going to try a refactoring right now. :)

llvm-svn: 116359
 2010-10-12 22:55:35 +00:00
Bill Wendling 9513a7e87f Don't need to specify calling convention. Add 'readnone' to functions. 
llvm-svn: 116354
 2010-10-12 22:24:10 +00:00
Bill Wendling ac6cd00706 Encoding for VADDD. Plus a test for the VFP instructions. 
llvm-svn: 116348
 2010-10-12 22:08:41 +00:00
Jim Grosbach 6fead930af Add encoding information for the remainder of the generic arithmetic 
ARM instructions.

llvm-svn: 116313
 2010-10-12 17:11:26 +00:00
Jim Grosbach b7c2962d20 MC machine encoding for simple aritmetic instructions that use a shifted 
register operand.

llvm-svn: 116259
 2010-10-11 23:16:21 +00:00
Michael J. Spencer a6a984bd96 MC-COFF: Fix .bss section size. Fixes PR8335. Patch by NAKAMUTA Takumi! 
llvm-svn: 116155
 2010-10-09 16:04:45 +00:00
Michael J. Spencer 86bbd71088 MC-COFF: Implement InitSections. Fixes PR8335. 
llvm-svn: 116151
 2010-10-09 15:44:27 +00:00
Michael J. Spencer c8dbdfd4ba MC-COFF: Add COFFAsmParser. Completes PR8343. 
llvm-svn: 116150
 2010-10-09 11:01:07 +00:00
Jim Grosbach c43c930690 Implement a few more binary encoding bits. Still very early stage proof-of- 
concept level stuff at this point, but it is generally working for those
instructions that know how to map the operands.

This patch fills in the register operands for add/sub/or/etc instructions
and adds the conditional execution predicate encoding.

llvm-svn: 116112
 2010-10-08 21:45:55 +00:00
Rafael Espindola af8b4871a8 Call InitSections in llc and clang so that the binaries produced by them 
are easier to diff with those produced by llvm-mc.

llvm-svn: 116095
 2010-10-08 19:37:38 +00:00
Jim Grosbach 42a07e8545 Add test file for simple ARM binary encodings with MC 
llvm-svn: 116024
 2010-10-08 00:47:59 +00:00
Michael J. Spencer 00be34d009 MC-COFF: Add test for my last commit. 
llvm-svn: 116015
 2010-10-08 00:00:28 +00:00
Michael J. Spencer 1666b61357 MC-COFF: Fix symbol aliases. Fixes PR8251. 
llvm-svn: 115909
 2010-10-07 06:29:33 +00:00
Rafael Espindola 5f2d6a5cd9 Get binding and visibility info from the the alias, but Type from the symbol 
being aliased.

llvm-svn: 115836
 2010-10-06 21:02:29 +00:00
Rafael Espindola d444577382 If a symbol is global, reloc against it even if it is in a mergeable section. 
llvm-svn: 115817
 2010-10-06 19:27:21 +00:00
Rafael Espindola 83b2a3337f Make sure weak symbols are listed after the local ones. 
llvm-svn: 115795
 2010-10-06 16:47:31 +00:00
Rafael Espindola 8f3d2c9058 Correctly handle GOTPCREL relocations. 
llvm-svn: 115793
 2010-10-06 16:23:36 +00:00
Rafael Espindola d7565c3a06 Use a relocation against the symbol if it is a PLT and the symbol is in another 
section. Common because of linkonce sections.

llvm-svn: 115718
 2010-10-05 23:57:26 +00:00
Rafael Espindola 0ad137e98e Implement more alias cases. 
llvm-svn: 115699
 2010-10-05 22:26:43 +00:00
Chris Lattner 13111b08fb Replace a gross hack (the MOV64ri_alt instruction) with a slightly less 
gross hack (having the asmmatcher handle the alias).

llvm-svn: 115685
 2010-10-05 21:09:45 +00:00
Rafael Espindola c58a37ea51 Don't crash in a strange .size directive. 
llvm-svn: 115684
 2010-10-05 21:02:45 +00:00
Michael J. Spencer a3b34ed2df MC-COFF: Fix (PR8278) temporary symbol relocations. 
llvm-svn: 115656
 2010-10-05 19:48:03 +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
Rafael Espindola b1d0789357 Implement a simple alias case and refactor the code a bit so that the 
isInSymtab and isLocal logic in the two loops don't get easily out of sync.

llvm-svn: 115643
 2010-10-05 18:01:23 +00:00
Michael J. Spencer 8ccdd25fbd test/COFF: Fix symbol indexes and names. Update tests to match. 
llvm-svn: 115642
 2010-10-05 17:57:08 +00:00
Michael J. Spencer f6230d1d4b test/COFF: Remove temp file usage. 
llvm-svn: 115641
 2010-10-05 17:56:56 +00:00
Michael J. Spencer 868aaf3c3d Cleanup Whitespace. 
llvm-svn: 115639
 2010-10-05 17:56:37 +00:00
Rafael Espindola d03e81dba8 Produce a undefined reference to _GLOBAL_OFFSET_TABLE_ when needed. 
llvm-svn: 115623
 2010-10-05 15:48:37 +00:00
Rafael Espindola 259bcdad06 Tests that now pass. 
llvm-svn: 115622
 2010-10-05 15:43:32 +00:00
Sean Callanan 6296bbbb65 Added a testcase for the ENTER instruction. 
llvm-svn: 115580
 2010-10-05 00:21:40 +00:00
Rafael Espindola fd1fff8b19 Implement ELF::R_X86_64_GOTPCREL. 
llvm-svn: 115547
 2010-10-04 19:51:39 +00:00
Rafael Espindola baadbd554a Produce a R_X86_64_PLT32 when needed. 
llvm-svn: 115541
 2010-10-04 19:04:13 +00:00
Rafael Espindola b2c4ca6433 Produce a R_X86_64_GOT32 when needed. 
llvm-svn: 115537
 2010-10-04 18:44:25 +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
Rafael Espindola da0e3d07b2 Include the section address in the computation of the relocation. 
llvm-svn: 115509
 2010-10-04 15:59:01 +00:00
Rafael Espindola 7c48b06930 Correctly compute the relocation when it is not in the first fragment. 
llvm-svn: 115506
 2010-10-04 15:28:43 +00:00
Eli Friedman bb48e26732 Add 3DNowA instructions. 
llvm-svn: 115477
 2010-10-03 20:23:13 +00:00
Chris Lattner d3593c3a8e the immediate field of pshufw is actually an 8-bit field, not a 8-bit field that is sign extended. This fixes PR8288 
llvm-svn: 115473
 2010-10-03 19:09:13 +00:00
Chris Lattner b44b202d66 add support for the prefetch/prefetchw instructions, move femms into 
the right file.  The assembler supports all the 3dnow instructions now,
but not the "3dnowa" ones.

llvm-svn: 115468
 2010-10-03 18:42:30 +00:00
Chris Lattner 3a0a620c2e what the heck, add support for the rest of the 3dNow! binary operations. 
llvm-svn: 115467
 2010-10-03 18:24:18 +00:00
Chris Lattner 45270db916 Implement support for the bizarre 3DNow! encoding (which is unlike anything 
else in X86), and add support for pavgusb.  This is apparently the
only instruction (other than movsx) that is preventing ffmpeg from building
with clang.

If someone else is interested in banging out the rest of the 3DNow! 
instructions, it should be quite easy now.

llvm-svn: 115466
 2010-10-03 18:08:05 +00:00
Rafael Espindola f70b4e0c2e Implement a very basic PIC case. 
llvm-svn: 115454
 2010-10-03 00:46:57 +00:00
Chris Lattner 4756bbeba0 fix a regression introduced in r115243, in which the instruction 
backing int_x86_ssse3_pshuf_w got removed.  This caused PR8280.

llvm-svn: 115422
 2010-10-02 21:32:15 +00:00
Chris Lattner a2f2c27b20 actually, move the elf tests into the existing elf dir. 
llvm-svn: 115416
 2010-10-02 18:53:48 +00:00
Chris Lattner 7b1638b40b consolidate ELF tests into asmparser tests. 
llvm-svn: 115415
 2010-10-02 18:52:57 +00:00
Chris Lattner fbae9435c9 move ARM MC tests up one level. 
llvm-svn: 115414
 2010-10-02 18:52:05 +00:00
Chris Lattner 4ca7bb52d0 move X86 subdir up a level 
llvm-svn: 115292
 2010-10-01 04:32:20 +00:00
Rafael Espindola f987d5ea1c Factor some logic into ShouldRelocOnSymbol. This simplifies the code and 
fixes some cases where we were producing relocations with at symbol that
should use a section instead.

llvm-svn: 115194
 2010-09-30 20:18:35 +00:00
Chris Lattner 1dee57fb7d more cleanups. 
llvm-svn: 115178
 2010-09-30 17:29:05 +00:00
Chris Lattner 288a5f9652 merge and clean up tests. 
llvm-svn: 115177
 2010-09-30 17:24:05 +00:00
Chris Lattner 60217e765e merge two tests. 
llvm-svn: 115175
 2010-09-30 17:18:22 +00:00
Chris Lattner 41a0cd14b7 rename test 
llvm-svn: 115174
 2010-09-30 17:16:49 +00:00
Chris Lattner ea226b24ff generalize test. 
llvm-svn: 115172
 2010-09-30 17:15:42 +00:00
Chris Lattner 28307d1a1e rename test. 
llvm-svn: 115171
 2010-09-30 17:14:55 +00:00
Chris Lattner 45a52f3c34 merge two tests. 
llvm-svn: 115170
 2010-09-30 17:14:30 +00:00
Chris Lattner 73a7caee4b preemptively add the rest of the non-n fpstack instructions. 
llvm-svn: 115168
 2010-09-30 17:11:29 +00:00
Chris Lattner 28b3b43fb4 merge two tests. 
llvm-svn: 115165
 2010-09-30 17:05:37 +00:00
Chris Lattner 1e9e49f421 fix this to not be completely broken. 
llvm-svn: 115164
 2010-09-30 17:04:59 +00:00
Chris Lattner c8f0e29b5e update, unxfail, fix bogus encodings. 
llvm-svn: 115163
 2010-09-30 17:03:20 +00:00
Chris Lattner a9e913e139 update and unxfail 
llvm-svn: 115162
 2010-09-30 17:00:53 +00:00
Chris Lattner ccf2c765f0 unxfail this by fixing syntactic differences. 
llvm-svn: 115161
 2010-09-30 16:59:28 +00:00
Chris Lattner 4373badcdf implement support for finit, PR8258 
llvm-svn: 115156
 2010-09-30 16:42:53 +00:00
Chris Lattner adc0dbe470 add support for fstcw, PR8259 
llvm-svn: 115154
 2010-09-30 16:39:29 +00:00
Jan Wen Voung efbdbe5565 Move logic of determining ELF entsize from the .s printer to initialization 
time. That way, the EntrySize field is initialized for other code paths, 
namely, the .ll -> .o code path.

llvm-svn: 115141
 2010-09-30 05:59:22 +00:00
Rafael Espindola 9d98ac645e Add another test that now passes. 
llvm-svn: 115137
 2010-09-30 04:22:07 +00:00
Rafael Espindola 70d6e0e0ff Correctly produce R_X86_64_32 or R_X86_64_32S. 
With this patch in

movq    $foo, foo(%rip)
foo:
.long   foo

We produce a R_X86_64_32S for the first relocation and R_X86_64_32 for the
second one.

llvm-svn: 115134
 2010-09-30 03:11:42 +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
Rafael Espindola 2ebaee9c75 Make it possible for the MCObjectWriter to decide if a given fixup is fully 
resolved or not. Different object files have different restrictions and
different native assemblers have different idiosyncrasies we want to emulate
for now.

Move the existing MachO logic to the new place and implement an ELF one that
gets fixups to globals right.

llvm-svn: 115131
 2010-09-30 02:22:20 +00:00
Chris Lattner 2b43c1cf42 implement rdar://8491845 - Gas supports commuted forms of non-commutable instructions. 
llvm-svn: 115061
 2010-09-29 18:39:16 +00:00
Rafael Espindola 53f0bf194a Move "local commons" to the end of .bss to match the gnu as behavior. 
llvm-svn: 115037
 2010-09-29 14:52:01 +00:00
Rafael Espindola 68e05d404a Add a test that I forgot to add with a previous commit. 
llvm-svn: 115036
 2010-09-29 14:40:49 +00:00
Chris Lattner 8f7851d2b4 fix rdar://8490728 - llvm-mc rejects gpr64 form of 'movmskpd' 
llvm-svn: 115029
 2010-09-29 05:05:03 +00:00
Chris Lattner 52e6020883 add assembler support for the cvtsd2sil/cvtsd2siq mnemonics, rdar://8456382 
llvm-svn: 115027
 2010-09-29 04:55:40 +00:00
Michael J. Spencer 822dc48c3a MC-COFF: Fix test. IMAGE_SYM_CLASS_LABEL should never have been emitted. 
llvm-svn: 115024
 2010-09-29 03:59:25 +00:00
Chris Lattner 5da7f9fcfd make the x86 mccode emitter emit the 0x67 and 0x66 prefix bytes in the same 
order as cctools for diffability.

llvm-svn: 115022
 2010-09-29 03:43:43 +00:00
Chris Lattner a4e1c74947 implement support for 32-bit address operands in 64-bit mode, which 
are defined to emit the 0x67 prefix byte.  rdar://8482675

llvm-svn: 115021
 2010-09-29 03:33:25 +00:00
Chris Lattner f60062fd55 add basic avx support to the disassembler, also teach it about ssmem/sdmem 
operands.

With this done, we can remove the _Int suffixes from the round instructions
without the disassembler blowing up.  This allows the assembler to support
them, implementing rdar://8456376 - llvm-mc rejects 'roundss'

llvm-svn: 115019
 2010-09-29 02:57:56 +00:00
Chris Lattner ff3a3930a0 add asmparser support for cvttpd2dq by removing some Int_ prefixes. 
Clean up cvttps2dq by removing some redundant implementations of the
same instruction.  rdar://8456382

llvm-svn: 115018
 2010-09-29 02:36:32 +00:00
Chris Lattner ef1c2fc305 implement rdar://8456382 - cvtsd2si support, by removing some Int_ prefixes. 
llvm-svn: 115017
 2010-09-29 02:24:57 +00:00
Chris Lattner a63292a3ca implement rdar://8456378 and PR7557 - support for the fstsw, 
an instruction that requires a WHOLE NEW wonderful kind of alias.

llvm-svn: 115015
 2010-09-29 01:50:45 +00:00
Rafael Espindola 01d20a76fe On elf, undefined symbols can start with .L. 
llvm-svn: 114958
 2010-09-28 16:19:11 +00:00
Rafael Espindola 96bfb50c03 Write relocations in the end of the file. This matches what gas does and 
makes files easier to diff.

llvm-svn: 114898
 2010-09-27 22:04:54 +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
Michael J. Spencer d628377a2d MC-COFF: Drop empty sections, and label symbols. Convert relocations 
targeted at symbols into relocations relative to the containing section.

Patch by Nathan Jeffords!

llvm-svn: 114823
 2010-09-27 08:58:26 +00:00
Chris Lattner b6a7f97c88 yet more aliases. 
llvm-svn: 114822
 2010-09-27 07:24:57 +00:00
Chris Lattner 882626cd5b add a couple more aliases, rdar://8456378 
llvm-svn: 114821
 2010-09-27 07:21:41 +00:00
Chris Lattner 972c60d821 fix rdar://8470918 - llvm-mc can't assemble smovl 
llvm-svn: 114819
 2010-09-27 07:11:53 +00:00
Chris Lattner ff0062af62 Fix rdar://8468087 - llvm-mc commutes fmul (and friend) operands. 
My previous fix for rdar://8456371 should only apply to fmulp/faddp,
not to fmul/fadd.  Instruction set orthogonality is overrated or 
something.

llvm-svn: 114818
 2010-09-27 07:08:21 +00:00
Chris Lattner 4f59cbfb66 implement support for 'clr' alias. This is part of rdar://8416805, 
but balrog was wanting it on irc.

llvm-svn: 114809
 2010-09-27 04:23:03 +00:00
Rafael Espindola 75d65b9a03 Move ELF to HasReliableSymbolDifference=true. Also take the opportunity to put 
symbols defined in merge sections in independent atoms.

llvm-svn: 114786
 2010-09-25 05:42:19 +00:00
Rafael Espindola cf1f985838 Reapply 114678 and 114667. Reverting them did not fix the bot: 
http://google1.osuosl.org:8011/builders/llvm-gcc-i386-linux-selfhost/builds/69

llvm-svn: 114761
 2010-09-24 21:19:03 +00:00
Rafael Espindola 3843bb9d2c Revert 114678 and 114667 to see if 
http://google1.osuosl.org:8011/builders/llvm-gcc-i386-linux-selfhost

gets happy.

llvm-svn: 114742
 2010-09-24 18:48:08 +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
Rafael Espindola f458f04eb1 Correctly handle weak undefined symbols. Before we would get a invalid binding 
(2 == STB_WEAK | STB_GLOBAL).

llvm-svn: 114690
 2010-09-23 19:55:14 +00:00
Rafael Espindola 48e108753b Represent relocations against local symbols as relocations against the section 
they are in. Both ways should be equivalent, but gas produces relocations
against the section.

Roman wrote the patch, I added the test.

llvm-svn: 114667
 2010-09-23 17:25:18 +00:00
Rafael Espindola dee12d8110 Avoid some Mach-O specific alignment being done on ELF. 
llvm-svn: 114594
 2010-09-22 22:27:05 +00:00
Rafael Espindola 9bac6cb544 Correctly align bss. 
llvm-svn: 114556
 2010-09-22 17:43:04 +00:00
Chris Lattner 415624cf3f fix rdar://8456371 - Handle commutable instructions written backward. 
llvm-svn: 114536
 2010-09-22 06:26:39 +00:00
Chris Lattner bd85725341 Fix an inconsistency in the x86 backend that led it to reject "calll foo" on 
x86-32: 32-bit calls were named "call" not "calll".  64-bit calls were correctly
named "callq", so this only impacted x86-32.

This fixes rdar://8456370 - llvm-mc rejects 'calll'

This also exposes that mingw/64 is generating a 32-bit call instead of a 64-bit call,
I will file a bugzilla.

llvm-svn: 114534
 2010-09-22 05:49:14 +00:00
Chris Lattner 37fc469f88 fix rdar://8456412 - llvm-mc crash in encoder on "mov %rdx, %cr8" 
Teaching the code generator about CR8-15, how to rex them up, etc.

llvm-svn: 114533
 2010-09-22 05:29:50 +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
Chris Lattner 9dfd2e354e add the missing aliases for fp stack cmovs, rdar://8456391 
llvm-svn: 114531
 2010-09-22 04:56:20 +00:00
Chris Lattner 1261b81e82 Fix rdar://8456364 - llvm-mc rejects '%CS' 
llvm-svn: 114528
 2010-09-22 04:11:10 +00:00
Chris Lattner 39cf8deded fix rdar://8456389 - llvm-mc mismatch with 'as' on 'fstp' 
-This line, and those below, will be ignored--

M    test/MC/AsmParser/X86/x86_instructions.s
M    lib/Target/X86/AsmParser/X86AsmParser.cpp

llvm-svn: 114527
 2010-09-22 04:04:03 +00:00
Chris Lattner a91e510f94 fix rdar://8456361 - llvm-mc rejects 'rep movsd' 
llvm-svn: 114526
 2010-09-22 03:50:32 +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
Rafael Espindola 32ab4558fe Produce a R_X86_64_32 when the value is >=0. 
llvm-svn: 114339
 2010-09-20 19:20:47 +00:00
Rafael Espindola 57e599a82a Make sure the STT_FILE symbol is the first one in the symbol table. 
llvm-svn: 114285
 2010-09-18 15:03:21 +00:00
Rafael Espindola 15829c6c4c Add test that was missing in my previous commit. 
llvm-svn: 114248
 2010-09-18 00:37:27 +00:00
Benjamin Kramer de636ca9a8 Fix vmov.f64 disassembly on targets where sizeof(long) != 8. 
llvm-svn: 114240
 2010-09-17 23:48:07 +00:00
Chris Lattner cea0a8d7ae fix rdar://8444631 - encoder crash on 'enter' 
What a weird instruction.

llvm-svn: 114190
 2010-09-17 18:02:29 +00:00
Daniel Dunbar 35a7a0ee2e MC/Mach-O/i386: Fix a crash in relocation handling. 
llvm-svn: 114176
 2010-09-17 15:21:50 +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
Chris Lattner 74d320db97 fix rdar://8438816 - unrecognized 'fildq' instruction 
llvm-svn: 114116
 2010-09-16 20:46:38 +00:00
Rafael Espindola 44bf266111 Print the address of sections as 0 and create the metadata sections in the 
same order as gnu as.

llvm-svn: 114109
 2010-09-16 19:46:31 +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
Jim Grosbach 196841144d add a test of an edge case value for the FP immediate (needs all digits of 
precision)

llvm-svn: 114028
 2010-09-15 21:52:13 +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
Jim Grosbach 27ab5fbd2b Teach the MC disassembler to handle vmov.f32 and vmov.f64 immediate to register 
moves. Previously, the immediate was printed as the encoded integer value,
which is incorrect.

llvm-svn: 114021
 2010-09-15 21:04:54 +00:00
Chris Lattner ee7e6f42f8 lcall and ljmp always default to lcalll and ljmpl. This finally 
wraps up r8418316

llvm-svn: 113949
 2010-09-15 05:30:20 +00:00
Chris Lattner 09bfe645f6 apparently jmpl $1,$2 is an alias for ljmpl, similiarly 
for call.  Add this.

llvm-svn: 113948
 2010-09-15 05:25:21 +00:00
Chris Lattner 6757eae45e Disambiguate lcall/ljmp to the 32-bit version. This happens 
even in 64-bit mode apparently.

llvm-svn: 113945
 2010-09-15 05:14:54 +00:00
Chris Lattner 5be87c619b fix the encoding of sldt GR16 to have the 0x66 prefix, and 
add sldt GR32, which isn't documented in the intel manual
but which gas accepts.  Part of rdar://8418316

llvm-svn: 113938
 2010-09-15 04:45:10 +00:00
Chris Lattner 6b40b0def1 implement aliases for shld/shrd, part of rdar://8418316 
llvm-svn: 113937
 2010-09-15 04:37:18 +00:00
Chris Lattner 4bd21710b6 fix rdar://8431880 - rcl/rcr with no shift amount not recognized 
llvm-svn: 113936
 2010-09-15 04:33:27 +00:00
Chris Lattner 81ce173860 add various broken forms of fnstsw. I didn't add the %rax 
version because it adds a prefix and makes even less sense
than the other broken forms.  This wraps up rdar://8431422

llvm-svn: 113932
 2010-09-15 04:15:16 +00:00
Chris Lattner 7df35dbd19 add some aliases for f[u]comi, part of rdar://8431422 
llvm-svn: 113930
 2010-09-15 04:08:38 +00:00
Chris Lattner 4dbcba0082 add a bunch of aliases for fp operations with no operand, 
rdar://8431422

llvm-svn: 113929
 2010-09-15 04:04:33 +00:00
Michael J. Spencer 46d4cc2ef7 test: Fix coff-dump section array indicies to 1 based to match file format. 
llvm-svn: 113928
 2010-09-15 03:58:51 +00:00
Jim Grosbach c7cf42d80b Reapply r113875 with additional cleanups. 
"The register specified for a dregpair is the corresponding Q register, so to
get the pair, we need to look up the sub-regs based on the qreg. Create a
lookup function since we don't have access to TargetRegisterInfo here to
be able to use getSubReg(ARM::dsub_[01])."

Additionaly, fix the NEON VLD1* and VST1* instruction patterns not to use
the dregpair modifier for the 2xdreg versions. Explicitly specifying the two
registers as operands is more correct and more consistent with the other
instruction patterns. This enables further cleanup of special case code in the
disassembler as a nice side-effect.

llvm-svn: 113903
 2010-09-14 23:54:06 +00:00
Chris Lattner 5f2311dc29 add a terrible hack to allow out with dx is parens, a gas bug. 
This fixes PR8114

llvm-svn: 113894
 2010-09-14 23:34:29 +00:00
Chris Lattner 1bbb14ab8f add a missed cmov alias, part of rdar://8416805 
llvm-svn: 113693
 2010-09-11 17:08:22 +00:00
Chris Lattner 3340c3e86c add support for all the setCC aliases. Part of rdar://8416805 
llvm-svn: 113692
 2010-09-11 17:06:05 +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 b47c042e09 add support for pushfd/popfd which are aliases for pushfl/popfl. 
This fixes rdar://8408129 - pushfd and popfd get invalid instruction mnemonic errors

llvm-svn: 113690
 2010-09-11 16:39:16 +00:00
Chris Lattner 30561aba20 implement rdar://8407928 - support for in/out with a missing "a" register. 
llvm-svn: 113689
 2010-09-11 16:32:12 +00:00
Rafael Espindola 2833e392ab Change section_data dumping to print hex numbers instead of using 
python's %r.

llvm-svn: 113685
 2010-09-11 15:25:58 +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
Daniel Dunbar 43325c4a68 llvm-mc: Make sure we exit != 0 if any errors are encountered. 
llvm-svn: 113551
 2010-09-09 22:42:56 +00:00
Benjamin Kramer 0a96578ac0 Add an elf-dumper utility. 
- Output format and some of the code stolen from macho-dump.
- Somewhat incomplete and probably buggy.
- Comes with a very basic test.

llvm-svn: 113488
 2010-09-09 15:00:41 +00:00
Chris Lattner 28a9c2f89a fix rdar://8407548, I missed the commuted form of xchg/test without a suffix. 
llvm-svn: 113427
 2010-09-08 22:27:05 +00:00
Chris Lattner 8ead237758 fix bugs in push/pop segment support, rdar://8407242 
llvm-svn: 113422
 2010-09-08 22:13:08 +00:00