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362 Commits

Author SHA1 Message Date
Jim Grosbach
9b5b125c34 Move some ARM specific MCAssmebler bits into the ARMAsmBackend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148364 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-01-18 00:23:57 +00:00
David Blaikie
2d24e2a396 Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146960 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-12-20 02:50:00 +00:00
Jim Grosbach
370b78d795 Move target-specific logic out of generic MCAssembler. 
Whether a fixup needs relaxation for the associated instruction is a
target-specific function, as the FIXME indicated. Create a hook for that
and use it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145881 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-12-06 00:47:03 +00:00
Jim Grosbach
f68a26b5d8 Tidy up. Hard tabs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145878 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-12-06 00:13:09 +00:00
Jim Grosbach
f77d5b14af Switch MCAssembler to method names starting w/ lower-case. 
per http://llvm.org/docs/CodingStandards.html#ll_naming

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145873 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-12-06 00:03:48 +00:00
Jim Grosbach
6200611dff Better fix for ARM MOVT relocation encoding of thumb bit. 
Replaces r145318 with a more targetted fix for the relocation handling.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145346 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-29 01:15:25 +00:00
Jim Grosbach
958da85b93 Thumb2 only force the fixup thumb bit for data relocations. 
rdar://10493453

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145318 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-28 23:39:00 +00:00
Jim Grosbach
684457d179 Trailing whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143071 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-10-26 22:44:41 +00:00
Evan Cheng
3e74d6fdd2 Move TargetRegistry and TargetSelect from Target to Support where they belong. 
These are strictly utilities for registering targets and components.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138450 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-24 18:08:43 +00:00
Evan Cheng
78c10eeaa5 Rename TargetAsmBackend to MCAsmBackend; rename createAsmBackend to createMCAsmBackend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136010 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-25 23:24:55 +00:00
Evan Cheng
a7cfc08ebe Move TargetAsmParser.h TargetAsmBackend.h and TargetAsmLexer.h to MC where they belong. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135833 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-23 00:45:41 +00:00
Rafael Espindola
4eafe10945 Don't force relaxation of AdvanceLoc instructions on OS X. gdb is happy with 
the smaller encoding and this cuts 270336 bytes from a release version of
clang and 1246272 bytes from a debug build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131067 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-08 14:35:21 +00:00
Daniel Dunbar
c8497b6a25 MCAsmLayout: Add support for computing the symbol offset of variables. Not 
currently used, because variables don't get reported as being "defined".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130524 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:20:20 +00:00
Rafael Espindola
235b830328 Add a small temporary hack for producing identical eh_frame sections on OS X. 
This removes one of the main advantages of moving eh_frame to MC, but
makes the transition a lot easier to debug (run md5).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130379 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-28 04:04:14 +00:00
Rafael Espindola
d88cac0a6e No relocation produces a SLEB or ULEB, make sure they are handled in MC. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130181 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-26 02:17:58 +00:00
Jay Foad
ddcdcc8863 Remove unused STL header includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130068 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-23 19:53:52 +00:00
Rafael Espindola
908159b46a Gas is very inconsistent about when a relaxation/relocation is needed. Do 
the right thing and stop trying to copy it. Fixes PR8944.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125648 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-16 03:25:55 +00:00
Rafael Espindola
96aa78c8c5 Add support for the --noexecstack option. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124077 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-23 17:55:27 +00:00
Rafael Espindola
245a1e2041 Relax address updates in the eh_frame section. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122591 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-28 05:39:27 +00:00
Rafael Espindola
fea753b397 Merge IsFixupFullyResolved and IsSymbolRefDifferenceFullyResolved. We now 
have a single point where targets test if a relocation is needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122549 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-24 21:22:02 +00:00
Rafael Espindola
835439a397 Assert that the AddrDelta expression is really constant and wrap it in a set 
if we have a lame assembler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122446 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-22 22:04:28 +00:00
Rafael Espindola
33a38a1b5a Use references and simplify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122405 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-22 16:11:57 +00:00
Rafael Espindola
7a45903bf4 Don't relax org or align. They change size as the relaxation happens, but they 
are not actually relaxed. For example, a section with only alignments will never
needs relaxation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122356 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-21 20:35:18 +00:00
Rafael Espindola
62b83b62f3 Layout one section until no relaxations are done and then move to the next 
section.

This helps because in practice sections form a dag with debug sections pointing
to text sections. Finishing up the text sections first makes the debug section
relaxation trivial.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122314 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-21 04:22:09 +00:00
Owen Anderson
175fb36f10 Thumb's forced-PC-alignment requirement applies to the _total_ displacement, not just to the fragment relative 
portion.  While the fragment boundary is usually already aligned, it is possible for it not to be, which 
would lead to a non-aligned final displacement.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122091 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-17 21:49:48 +00:00
Daniel Dunbar
5d2477cecf MC/Assembler: Strip out object writer arguments, now that it is always available 
-- and remove FIXME asking for the same!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122032 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-17 02:45:59 +00:00
Daniel Dunbar
feb7ba3d9a MC/Assembler: Make the MCObjectWriter available through the lifetime of the 
assembler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122031 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-17 02:45:41 +00:00
Daniel Dunbar
2761fc4270 MC: Move target specific fixup info descriptors to TargetAsmBackend instead of 
the MCCodeEmitter, which seems like a better organization.
 - Also, cleaned up some magic constants while in the area.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121953 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-16 03:20:06 +00:00
Owen Anderson
d18e011cbb Fix typo in r121875. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121880 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-15 19:24:24 +00:00
Owen Anderson
47dbd429da Implement cleanups suggested by Daniel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121875 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-15 18:48:27 +00:00
Rafael Espindola
2bf6afc277 Relax alignment fragments. 
With this we don't need the EffectiveSize field anymore. Without that field
LayoutFragment only updates offsets and we don't need to invalidate the
current fragment when it is relaxed (only the ones following it).

This is also a very small improvement in the accuracy of the layout info as
we now use the after relaxation size immediately.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121857 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-15 08:45:53 +00:00
Rafael Espindola
f9a4476173 Patch by David Meyer to avoid a O(N^2) behaviour when relaxing fragments. 
Since we now don't update addresses so early, we might relax a bit more than
we need to. This is simillar to the issue in PR8467.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121856 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-15 07:39:29 +00:00
Jim Grosbach
4750020788 ARM Fixups relative to thumb functions need to have the low bit of the value 
set for interworking to work properly. rdar://8755956

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121778 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-14 18:46:57 +00:00
Owen Anderson
05018c2f28 Fix an issue in some Thumb fixups, where the effective PC address needs to be 4-byte aligned when calculating 
the offset.  Add a new fixup flag to represent this, and use it for the one fixups that I have a testcase for needing
this.  It's quite likely that the other Thumb fixups will need this too, and to have their fixup encoding logic
adjusted accordingly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121408 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-09 20:27:52 +00:00
Rafael Espindola
4f4363a490 Layout each section independently. With the testcase in PR8711: 
before:
        4 assembler - Number of assembler layout and relaxation steps
    78563 assembler - Number of emitted assembler fragments
  8693904 assembler - Number of emitted object file bytes
   271223 assembler - Number of evaluated fixups
330771677 assembler - Number of fragment layouts
     5958 assembler - Number of relaxed instructions
  2508361 mcexpr    - Number of MCExpr evaluations

real	0m26.123s
user	0m25.694s
sys	0m0.388s

after:

      4 assembler - Number of assembler layout and relaxation steps
  78563 assembler - Number of emitted assembler fragments
8693904 assembler - Number of emitted object file bytes
 271223 assembler - Number of evaluated fixups
 231507 assembler - Number of fragment layouts
   5958 assembler - Number of relaxed instructions
2508361 mcexpr    - Number of MCExpr evaluations

real	0m2.500s
user	0m2.113s
sys	0m0.273s

And yes, the outputs are identical :-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121207 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 23:32:26 +00:00
Rafael Espindola
85f2ecc697 Sorry for such a large commit. The summary is that only MachO cares about the 
actuall addresses in a .o file, so it is better to let the MachO writer compute
it.

This is good for two reasons. First, areas that shouldn't care about
addresses now don't have access to it. Second, the layout of each section
is independent. I should use this in a subsequent commit to speed it up.

Most of the patch is just removing the section address computation. The two
interesting parts are the change on how we handle padding in the end
of sections and how MachO can get the address of a-b when a and b are in
different sections.

Since now the expression evaluation normally doesn't know the section address,
it will think that a-b needs relocation and let the MachO writer know. Once
it has computed the section addresses, it calls back the expression evaluation
with the section addresses to resolve these expressions.

The remaining problem is the handling of padding. Currently it will create
a special alignment fragment at the end. Since that fragment doesn't update
the alignment of the section, it needs the real address to be computed.

Since now the layout will not compute a-b with a and b in different sections,
the only effect that the special alignment fragment has is update the
address size of the section. This can also be done by the MachO writer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121076 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-07 00:27:36 +00:00
Rafael Espindola
22373b230a Use references to simplify the code a bit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121050 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-06 22:30:54 +00:00
Rafael Espindola
179821ac1f Remove the instruction fragment to data fragment lowering since it was causing 
freed data to be read. I will open a bug to track it being reenabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121028 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-06 19:08:48 +00:00
Rafael Espindola
f8803fe417 Remove the getAddress getter, initialize Ordinal in the constructor and use 
that on the ELF writer to detect a section we created.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120981 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-06 03:48:09 +00:00
Rafael Espindola
ffd902bfb7 Add a getSymbolOffset method and use it in the ELF writer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120977 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-06 02:57:26 +00:00
Rafael Espindola
b4172fa729 Once the layout is done we don't need to keep updating which fragments are 
valid. Addresses will not change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120921 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-04 22:47:22 +00:00
Rafael Espindola
db74aeadcd Remember the contents of leb and dwarfline fragments when relaxing. This avoids 
having to evaluate the expression again when writing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120920 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-04 21:58:52 +00:00
Rafael Espindola
6db8a9f3fa The sections that the ELF object writer has to create are very simple and 
contain only data. Handle them specially instead of using AddSectionToTheEnd.
This moves a hack from the generic assembler to the elf writer. It is also
a bit faster and should make other improvements easier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120683 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-02 03:09:06 +00:00
Rafael Espindola
6566e0a55e Remove unused argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120621 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-01 22:48:11 +00:00
Rafael Espindola
a9d4281cc0 Invalidate the layout on any relaxation, not just Instructions. Bug found by David Meyer. 
While here, remove unused argument and rename UpdateForSlide to Invalidate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120009 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-23 08:08:33 +00:00
Rafael Espindola
0e11dfc4a6 Reuse data fragments while lowering. Patch by David Meyer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119999 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-23 05:49:35 +00:00
Rafael Espindola
b651a96ef2 Add an assert. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119788 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-19 04:55:36 +00:00
Rafael Espindola
f2dc4aa562 make isVirtualSection a virtual method on MCSection. Chris' suggestion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119547 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-17 20:03:54 +00:00
Rafael Espindola
94ed5fca3f Change MCExpr::EvaluateAsRelocatableImpl of variables to return the original 
variable if recursing fails to simplify it.

Factor AliasedSymbol to be a method of MCSymbol.

Update MCAssembler::EvaluateFixup to match the change in
EvaluateAsRelocatableImpl.

Remove the WeakRefExpr hack, as the object writer now sees the weakref with
no extra effort needed.

Nothing else is using MCTargetExpr, but keep it for now.

Now that the ELF writer sees relocations with aliases, handle

    .weak    foo2
foo2:
    .weak    bar2
    .set    bar2,foo2
    .quad    bar2

the same way gas does and produce a relocation with bar2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119152 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-15 16:33:49 +00:00
Rafael Espindola
e25e1ef48b Speed up AddSectionToTheEnd. It was walking all fragments in all sections. 
This is really slow with we have 1000s of sections each with a corresponding
relocation section. Also, it is only used by the ELF writer to add
basic data, so there is no need to force a new layout pass.

Should fix PR8563.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118377 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-07 15:03:27 +00:00
Rafael Espindola
187d8339db Relax dwarf line fragments. This fixes a crash in the included testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118365 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-07 02:07:12 +00:00
Rafael Espindola
187ce544b2 Do relaxations with FT_Org fragments. Fixes the FIXME: 
// FIXME: We should compute this sooner, we don't want to recurse here, and
    // we would like to be more functional.

In MCAssembler::ComputeFragmentSize.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118080 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-02 21:38:23 +00:00
Rafael Espindola
3ff57094a7 Add support for expressions in .sleb/.uleb directives. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118023 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-02 17:22:24 +00:00
Kevin Enderby
c095793b4a This is the last major patch to implement support for the .loc directive 
and output the dwarf line number tables.  This contains the code to emit and
encode the dwarf line tables from the previously gathered information in the
MCLineSection objects.  This contains all the details to encode the line and
address deltas into the dwarf line table.

To do this an MCDwarfLineAddrFragment has been added.

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

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

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

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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115157 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-30 16:52:03 +00:00
Rafael Espindola
7070387f08 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115131 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-30 02:22:20 +00:00
Rafael Espindola
b814110612 Remove unused argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114852 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-27 18:13:03 +00:00
Daniel Dunbar
75413b1464 MC: Add missing ')' in diagnostic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114717 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-24 01:58:56 +00:00
Rafael Espindola
59ff3c9134 Avoid some Mach-O specific alignment being done on ELF. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114594 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-22 22:27:05 +00:00
Rafael Espindola
d80781b98b 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114027 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-15 21:48:40 +00:00
Daniel Dunbar
a6c329d66b MC: Give a (lame) hard error if a .org directive would create an unreasonably 
large object file (> 1GB).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113494 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-09 16:23:33 +00:00
Daniel Dunbar
c983b20661 MC/ELF: Allow null values in virtual sections, ELF doesn't use special 
directives for putting contents in .bss, for example.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111376 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-18 18:22:37 +00:00
Matt Fleming
a8bf473fb1 Layout helper function. 
Introduce a helper method to add a section to the end of a layout. This
will be used by the ELF ObjectWriter code to add the metadata sections
(symbol table, etc) to the end of an object file.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111171 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-16 18:35:06 +00:00
Matt Fleming
6c8b3d2f1f Record a symbol's size which is needed for ELF symbol tables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111170 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-16 18:34:31 +00:00
Daniel Dunbar
0ecdb6f3d8 MC: Initialize MCFragment::Offset, noticed by Cameron Esfahani. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109875 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-30 18:32:09 +00:00
Daniel Dunbar
36880e704f MC: Put back the MCFragment vtable, so subclasses are destroyed properly (duh). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109649 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-28 20:28:45 +00:00
Reid Kleckner
c96a82a534 Initial modifications to MCAssembler and TargetMachine for the MCJIT. 
Patch by Olivier Meurant!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109080 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-22 05:58:53 +00:00
Duncan Sands
6f74f69ff4 The variable ValueSize is set to 1 on both code paths, and then 
ignored!  Remove it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107138 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-29 13:30:08 +00:00
Daniel Dunbar
843aa1f15b MC: Simplify MCAssembler::isSymbolLinkerVisible to only take an MCSymbol. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106142 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-16 20:04:29 +00:00
Dan Gohman
4b1000d117 Don't call flush() at a library level which isn't checking for errors 
and doesn't know where the output is going.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105274 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-01 16:31:34 +00:00
Daniel Dunbar
83194de76a MC: When running with -mc-relax-all, we can eagerly relax instructions and avoid creating unnecessary MCInstFragments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104736 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 20:37:03 +00:00
Daniel Dunbar
95506d40c5 MC: Change RelaxInstruction to only take the input and output instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104713 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 18:15:06 +00:00
Daniel Dunbar
8488252855 MC: Simplify MayNeedRelaxation to not provide the fixups, so we can query it 
before encoding.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104707 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 17:45:29 +00:00
Daniel Dunbar
c90e30aa6f MC: Eliminate MCAsmFixup, replace with MCFixup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104699 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 15:18:56 +00:00
Daniel Dunbar
482ad802f1 MC: Use accessors for access to MCAsmFixup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104697 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 15:18:31 +00:00
Daniel Dunbar
e614e393c7 MC: Eliminate MCFragment vtable, which was unnecessary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104689 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 06:50:57 +00:00
Daniel Dunbar
47b3ec4daa MC: Switch to completely lazy layout. 
- The eliminates the last major algorithmic problem with MC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103754 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:51:14 +00:00
Daniel Dunbar
9005d45a99 MC: Extend MCAsmLayout to explicitly track which fragments have been layed out, and enforce several invariants to LayoutFragment to ensure we only do layout in a sensible order. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103753 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:37:21 +00:00
Daniel Dunbar
11c4111516 MC: Implicitly assign section addresses when the previous fragment is layed out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103752 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:37:17 +00:00
Daniel Dunbar
337718e09c MC: Switch MCFragment to storing the layout order index, not its index in the file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103751 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:37:14 +00:00
Daniel Dunbar
afc6acdab7 MC: Change LayoutSection() to only do the section initializiation. 
Also, elimminate MCAsmLayout::set*, which are no longer needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103750 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:37:11 +00:00
Daniel Dunbar
b69fc044db MC: Move Layout{Fragment,Section} into MCAsmLayout, and add LayoutFile(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103738 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 20:40:12 +00:00
Daniel Dunbar
2c18d3b0fe MC: Factor out MCAssembler::ComputeFragmentSize. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103724 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 18:35:06 +00:00
Daniel Dunbar
f60c736c64 MC: Add section layout order indices to MCSectionData. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103715 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 15:17:26 +00:00
Daniel Dunbar
49ed921190 MC: Move ordinal calculation, to make sure fragments synthesized for layout get assigned ordinals properly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103711 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 08:43:37 +00:00
Daniel Dunbar
09d3465f0e MC: Create dummy fragments to avoid ever having empty sections, which simplifies layout. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103710 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 08:43:34 +00:00
Daniel Dunbar
aa0d350fe5 MC: Add MCAsmLayout::FragmentReplaced() helper function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103709 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 08:43:31 +00:00
Daniel Dunbar
054be92e1d Fix -Asserts warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103697 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 03:50:50 +00:00
Daniel Dunbar
2661f11e46 MC: Eliminate MCSectionData::{,Address,File}Size, which can now be computed by 
utility functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103695 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 03:19:50 +00:00
Daniel Dunbar
61066dbdf2 MC: Switch to using explicit MCAlignFragments with OnlyAlignAddress bit instead 
of manually doing padding/editing layout in LayoutSection().
    - This probably seems like six-of-one and half-dozen of another, but there
      is a method to my madness.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103693 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 02:34:14 +00:00
Daniel Dunbar
456b501270 MC: Add MCAlignFragment::OnlyAlignAddress bit. This is a bit of magic that says the align fragment shouldn't contribute to the logical section size, it is will be used for cleaning up the code to handle section alignment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103690 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 01:10:26 +00:00
Daniel Dunbar
b5844ff1c4 MC: Add MCSectionData::AddressSize, which is the size of the address space consumed by the section. This can differ from both the section logical size, and the section size on disk (although the current code handles this without making an explicit distinction). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103689 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-13 01:10:22 +00:00
Daniel Dunbar
1c15413ebc MC: Move MCAlignFragment::EmitNops value out of the constructor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103665 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 22:56:23 +00:00
Daniel Dunbar
4e544870c4 MC: Eliminate MCZeroFillFragment, it is no longer needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103664 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 22:51:38 +00:00
Daniel Dunbar
e2fee5b236 MC: Explicitly check that only virtual fragments appear in virtual sections. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103663 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 22:51:35 +00:00
Daniel Dunbar
3153fec733 MC: Switch MCFillFragment to storing total fill size instead of a count. This allows using ValueSize==0 to represent a virtual fill. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103662 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 22:51:32 +00:00
Daniel Dunbar
e73d49eda2 MC: Drop support for alignment in ZeroFill fragment, we can just use 
MCAlignFragments for this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103661 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 22:51:27 +00:00
Daniel Dunbar
52f8dff671 Simplify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103651 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 21:47:55 +00:00
Daniel Dunbar
f0d17d2461 MC: Factor out MCAssembler::LayoutFragment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103649 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 21:35:25 +00:00
Daniel Dunbar
2d891a20e6 MC: Tweak section layout to not relying on accumulating address value. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103648 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 21:35:22 +00:00
Daniel Dunbar
d13a0caf72 MC: Simplify LayoutSection to just take the index of the section to layout. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103627 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 17:56:47 +00:00
Daniel Dunbar
bc1a0cf139 MC: Track section layout order explicitly, and use to simplify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103616 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 15:42:59 +00:00
Daniel Dunbar
a5f1d57f65 MC/Mach-O/x86_64: Add a new hook for checking whether a particular section can 
be diced into atoms, and adjust getAtom() to take this into account.
 - This fixes relocations to symbols in fixed size literal sections, for
   example.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103532 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-12 00:38:17 +00:00
Daniel Dunbar
651804c3d6 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103480 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-11 17:22:50 +00:00
Daniel Dunbar
071f73db4a MC/Mach-O: Explicitly track atoms, as represented by their defining symbol, for each fragment (not yet used). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103438 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-10 22:45:09 +00:00
Daniel Dunbar
31e8e1d085 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102986 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 00:33:07 +00:00
Chris Lattner
75361b69f3 rename llvm::llvm_report_error -> llvm::report_fatal_error 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100709 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-07 22:58:41 +00:00
Daniel Dunbar
ac2884a717 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99563 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-25 22:49:09 +00:00
Daniel Dunbar
0cc8bd4861 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99543 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-25 19:35:56 +00:00
Daniel Dunbar
f476b00f51 MC: Simplify main section layout process by moving alignment into LayoutSection. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99529 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-25 18:16:42 +00:00
Daniel Dunbar
be644a38c0 MC: Sink Section address assignment into LayoutSection. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99528 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-25 18:16:38 +00:00
Daniel Dunbar
5a6e97a7e4 MC: Explicity track section and fragment ordinals. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99500 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-25 07:10:11 +00:00
Daniel Dunbar
5d428511ca MC: Route access to SectionData offset and file size through MCAsmLayout. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99474 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-25 02:00:07 +00:00
Daniel Dunbar
432cd5fd9b MC: Route access to Fragment offset and effective size through MCAsmLayout. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99473 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-25 02:00:02 +00:00
Daniel Dunbar
7c3d45a03e MC: Eliminate MC{Fragment,{Section,Symbol}Data}::getAddress. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99467 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-25 01:03:24 +00:00
Daniel Dunbar
207e06ea04 MC: Direct all {fragment,section,symbol} address access through the MCAsmLayout object. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99380 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-24 03:43:40 +00:00
Daniel Dunbar
ff54784683 MC: Sprinkle in some more interesting statistics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99350 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-23 23:47:14 +00:00
Daniel Dunbar
d8036fb0de MC: Switch to using MCInst fragments to do relaxation. 
Also, both MCMachOStreamer and MCAssembler are now target independent!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99256 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-23 05:09:03 +00:00
Daniel Dunbar
337055e62f MC: Add TargetAsmBackend::MayNeedRelaxation, for checking whether a particular instruction + fixups might need relaxation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99249 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-23 03:13:05 +00:00
Daniel Dunbar
8f9b80e5df MC: Add TargetAsmBackend::WriteNopData and use to eliminate some target dependencies in MCMachOStreamer and MCAssembler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99248 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-23 02:36:58 +00:00
Daniel Dunbar
9799de910e 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. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99244 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-23 01:39:05 +00:00
Daniel Dunbar
3f4dcd92da MC: Add MCInstFragment, not used yet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99229 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-22 23:16:48 +00:00
Daniel Dunbar
9d39e616cc MC: Fix a few more cases we were passing an MCDataFragment when a MCFragment would do, and sprinkle in some const. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99218 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-22 21:49:41 +00:00
Daniel Dunbar
c6f598209a Simplify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99217 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-22 21:49:38 +00:00
Daniel Dunbar
b751418a39 MC: Change MCObjectWriter::RecordRelocation to take an MCFragment (instead of a MCDataFragment). Object files should only need the generic MCFragment features. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99205 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-22 20:35:50 +00:00
Daniel Dunbar
2a6e3f5be2 MC: Eliminate MCFragment::getMaxFileSize. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99203 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-22 20:35:43 +00:00
Daniel Dunbar
8d39eb47d6 MC: Share the MCAsmLayout object, although its still not used for anything important. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99202 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-22 20:35:35 +00:00
Daniel Dunbar
1a9158c301 MC: Add TargetAsmBackend::createObjectWriter. 
- MCAssembler is now object-file independent, although we will surely need more work to fully support ELF/COFF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98955 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 10:43:26 +00:00
Daniel Dunbar
b36052f0e4 MCCodeEmitter: Add target independent fixup flag for is-pc-relative. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98954 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 10:43:23 +00:00
Daniel Dunbar
cf871e5abf MC: Sink code emitter into MCAssembler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98953 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 10:43:18 +00:00
Daniel Dunbar
2df4ceba15 MC/Mach-O: Move to MachObjectWriter.{h,cpp}. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98952 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 10:43:15 +00:00
Daniel Dunbar
cc5b84c6fb MC: Add TargetAsmBackend::isVirtualSection hook. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98950 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 09:29:03 +00:00
Daniel Dunbar
53b2338a1d MC: Split MCObjectWriter out of MCAssembler.cpp. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98949 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 09:28:59 +00:00
Daniel Dunbar
bdd9281f35 MCAssembler: Pull out MCObjectWriter class. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98948 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 09:28:55 +00:00
Daniel Dunbar
87190c473c MCAssembler: Move ApplyFixup to the TargetAsmBackend, this is a target specific not object writer specific task. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98947 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 09:28:12 +00:00
Daniel Dunbar
b1e98945e4 MC/Mach-O: Lift the fixup evaluation and application up (to the same place), and eliminate MCAsmFixup::FixedValue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98944 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 07:09:47 +00:00
Daniel Dunbar
bacba99778 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. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98943 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 07:09:33 +00:00
Daniel Dunbar
17a0650641 MC/Mach-O: Lift relocation emission logic a bit higher to separate evaluation / relocation handling from the actual .o writing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98942 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 07:09:18 +00:00
Daniel Dunbar
034843ac8b 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98926 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 03:18:18 +00:00
Daniel Dunbar
8ad0dccbf2 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98925 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 03:18:15 +00:00
Daniel Dunbar
939f8d7ca2 MC/Mach-O: Factor out isScatteredFixupFullyResolvedSimple predicate, and fix some corner cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98924 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 03:18:12 +00:00
Daniel Dunbar
2386985663 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. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98923 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-19 03:18:09 +00:00
Daniel Dunbar
9a1d20042f MCValue: Change to holding MCSymbolRefExprs instead of MCSymbols, we will need this for accessing to symbol modifiers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98791 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-18 00:59:10 +00:00
Daniel Dunbar
d6e59084d0 MC/Mach-O/x86_64: Temporary labels in cstring sections require symbols (and external relocations, but we don't have x86_64 relocations yet). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98583 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-15 21:56:50 +00:00
Daniel Dunbar
99d22adcad MC/Mach-O: Add MCSectionMachO::getType() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98582 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-15 21:56:38 +00:00
Daniel Dunbar
5691e74f97 MC/X86_64: Symbol support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98456 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-13 22:49:35 +00:00
Daniel Dunbar
ee0d89245e MC/Mach-O: Initial x86_64 support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98454 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-13 22:10:17 +00:00
Daniel Dunbar
da3e9f760c 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98420 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-13 02:38:00 +00:00
Daniel Dunbar
f08fde41f3 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! :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98396 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-12 22:07:14 +00:00
Daniel Dunbar
df3c8f2969 MC: Factor out MCAssembler::EvaluateFixup, and simplify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98381 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-12 21:00:49 +00:00
Daniel Dunbar
8f0448cabc MC/Mach-O: Add MCSymbolData::getAddress() utility. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98266 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-11 18:22:51 +00:00
Daniel Dunbar
979ba5b3c7 MC/Mach-O: Implement "absolutizing" semantics of .set, by evaluating the assembly time value of variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98241 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-11 05:53:37 +00:00
Daniel Dunbar
18ff2cced7 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98240 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-11 05:53:33 +00:00
Daniel Dunbar
1f3e445184 MC: Provide MCAssembler with a TargetAsmBackend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98222 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-11 01:34:27 +00:00
Daniel Dunbar
2101d9c4af MC/Mach-O: Use the MCAssembler symbol map instead of reconstructing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98187 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-10 20:58:31 +00:00
Daniel Dunbar
07a9641ebf MC/Mach-O: Resolve a FIXME; these relocation types are no longer semanticaly different. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98120 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-10 02:10:29 +00:00
Daniel Dunbar
a015c1c876 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98115 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-10 00:58:25 +00:00
Daniel Dunbar
f3a066f7c3 MC/Mach-O: For PCrel relocations, we need to compensate for the PCrel adjustment when determining if we need a scattered relocation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98082 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-09 21:27:58 +00:00
Daniel Dunbar
aef9d7af69 MC/Mach-O: Also set the PCrel bit in the second half of paired relocation entries. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98081 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-09 21:27:47 +00:00
Daniel Dunbar
e180fa962c MC/Mach-O: Don't generate relocations for PCrel fixups to local labels. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98080 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-09 21:27:30 +00:00
Daniel Dunbar
45aefff64c MC/Mach-O: Tweak .dump() formatting. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98028 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-09 01:12:23 +00:00
Daniel Dunbar
f8b8ad77a8 MC/Mach-O: Don't adjust section sizes when aligning zero fill sections, just pad the address. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98027 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-09 01:12:20 +00:00
Daniel Dunbar
b2b4acd757 MC/Macho-O: Align the zerofill section itself to the maximum alignment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97991 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-08 22:03:42 +00:00
Daniel Dunbar
37fad5ce4d MC/Mach-O: Fix address compution for zero fill sections. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97984 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-08 21:10:42 +00:00
Daniel Dunbar
0ce6bd55c3 MC/Mach-O: Error out instead of crashing on invalid scattered relocation expressions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97983 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-08 21:10:39 +00:00
Kevin Enderby
76687083a5 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96988 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-23 21:41:24 +00:00
Kevin Enderby
6e72048add 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).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96963 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-23 18:26:34 +00:00
Daniel Dunbar
eb3804e39a MC/Mach-O: Update fixup values for change to X86 offsets. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96532 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-17 23:45:16 +00:00
Duncan Sands
9a7795cbed Pacify gcc-4.5, which warns (correctly) that these switches have 
cases that are not part of the enum.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96477 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-17 14:52:22 +00:00
Daniel Dunbar
591047f714 MCAssembler: Fix pcrel relocations. Oh and, 
--
ddunbar@ozzy:tmp$ clang -m32 -integrated-as hello.c && ./a.out
hello world!
--

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96096 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-13 09:45:59 +00:00
Daniel Dunbar
f6346769b3 MC/Mach-O: Start emitting fixups/relocations for instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96095 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-13 09:29:02 +00:00
Daniel Dunbar
2be2fd0730 MCAssembler: Switch MCAsmFixup to storing MCFixupKind instead of just a size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96094 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-13 09:28:54 +00:00
Daniel Dunbar
0bcf074867 MCAssembler: Sink fixup list into MCDataFragment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96093 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-13 09:28:43 +00:00
Daniel Dunbar
a4766d7af9 MCAssembler: Switch MCFillFragment to only taking constant values. Symbolic expressions can always be emitted as data + fixups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96092 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-13 09:28:32 +00:00
Daniel Dunbar
3a30b827a5 MCAssembler: Start applying fixups in the data section. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96090 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-13 09:28:15 +00:00
Daniel Dunbar
b7c3a4b195 MCAssembler: Add assorted dump() methods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96089 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-13 09:28:03 +00:00
Daniel Dunbar
cb7d743b42 MC: Move assembler-backend's fixup list into the fragment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95926 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-11 21:29:46 +00:00
Daniel Dunbar
27ade18431 MC: Move MCSectionData::Fixup out to MCAsmFixup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95925 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-11 21:29:29 +00:00
Daniel Dunbar
6b71653c82 llvm-mc: Add --show-fixups option, for displaying the instruction fixup information in the asm comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95710 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-09 23:00:14 +00:00
Daniel Dunbar
e1ec617c6a MC/Mach-O: Set SOME_INSTRUCTIONS bit for sections. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95135 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-02 21:44:01 +00:00
Chris Lattner
45f8c095ad Add a new top-level MachO.h file for manifest constants, fixing 
a layering violation from MC -> Target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95113 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-02 19:38:14 +00:00
Nate Begeman
60a17740b8 Remove this fixme, looking at the linker source, all targets pad to 4 bytes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93835 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-19 01:32:44 +00:00
Daniel Dunbar
2928c83b01 Pass StringRef by value. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86251 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-06 10:58:06 +00:00
Daniel Dunbar
7eb85194f2 Minor formatting tweaks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84235 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-16 01:58:15 +00:00
Daniel Dunbar
1253a6fa3b MC: Switch assembler API to using MCExpr instead of MCValue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84234 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-16 01:58:03 +00:00
Daniel Dunbar
efbb5330b8 llvm-mc: Store MCSymbolData value as a pointer (to make MSVC happy). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80652 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-01 04:09:03 +00:00
Daniel Dunbar
cb579b3338 llvm-mc: Make MCSymbolData symbol member const. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80573 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-31 08:08:06 +00:00
Daniel Dunbar
a03a368acc llvm-mc: Add MCContext to MCAssembler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80572 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-31 08:07:55 +00:00
Daniel Dunbar
8f4d146c34 llvm-mc: Support .comm emission. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80351 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-28 07:08:35 +00:00
Daniel Dunbar
d5a8e98ef6 llvm-mc: Support .zerofill emission. 
- I'm still trying to figure out the cleanest way to implement this and match the assembler, currently there are some substantial differences.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80347 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-28 05:49:21 +00:00
Daniel Dunbar
edc670f3f2 llvm-mc: Tweak section alignment and size computation to match 'as' closer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80345 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-28 05:49:04 +00:00
Daniel Dunbar
6c31b0575c llvm-mc: Fix thinko in emitting values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80340 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-28 05:48:10 +00:00
Daniel Dunbar
81e400092f Try to make MSVC just a little happier. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80187 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-27 00:38:04 +00:00
Daniel Dunbar
959fd88334 llvm-mc/Mach-O: Don't put assembler temporary labels in the symbol table. 
- I moved section creation back into AsmParser. I think policy decisions like
   this should be pushed higher, not lower, when possible (in addition the
   assembler has flags which change this behavior, for example).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80162 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-26 22:13:22 +00:00
Daniel Dunbar
6009db486e llvm-mc/Mach-O: Set .subsections_via_symbols flag properly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80144 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-26 21:22:22 +00:00
Daniel Dunbar
3f6a960f9c llvm-mc/Mach-O: Add support for relocations. 
- I haven't really tried to find the "right" way to store the fixups or apply
   them, yet. This works, but isn't particularly elegant or fast.

 - Still no evaluation support, so we don't actually ever not turn a fixup into
   a relocation entry.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80089 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-26 13:58:10 +00:00
Daniel Dunbar
be96355694 llvm-mc/Mach-O: Move symbol indices into the MCSymbolData structure. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80088 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-26 13:57:54 +00:00
Daniel Dunbar
6742e34385 llvm-mc/Mach-O: Add section padding where needed (to align the next section). 
Also, simplify some of Mach-O writer code which can now use section addresses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80067 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-26 04:13:32 +00:00
Daniel Dunbar
5e835967dd llvm-mc/Mach-O: Set addresses for symbols. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80065 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-26 02:48:04 +00:00
Daniel Dunbar
ad7c3d5593 llvm-mc: Improve indirect symbol support (add the indirect index table). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80059 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-26 00:18:21 +00:00
Daniel Dunbar
0adcd35f78 llvm-mc: Add statistic for number of fragments emitted by the assembler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80033 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-08-25 21:10:45 +00:00