12da8ce3d2
Introduce new linkage types linkonce_odr, weak_odr, common_odr
...
and extern_weak_odr. These are the same as the non-odr versions,
except that they indicate that the global will only be overridden
by an *equivalent* global. In C, a function with weak linkage can
be overridden by a function which behaves completely differently.
This means that IP passes have to skip weak functions, since any
deductions made from the function definition might be wrong, since
the definition could be replaced by something completely different
at link time. This is not allowed in C++, thanks to the ODR
(One-Definition-Rule): if a function is replaced by another at
link-time, then the new function must be the same as the original
function. If a language knows that a function or other global can
only be overridden by an equivalent global, it can give it the
weak_odr linkage type, and the optimizers will understand that it
is alright to make deductions based on the function body. The
code generators on the other hand map weak and weak_odr linkage
to the same thing.
llvm-svn: 66339
2009-03-07 15:45:40 +00:00
70d4c08cfe
Treat [1 x i8] zeroinitializer as a C string, placing such stuff into
...
mergeable string section. I don't see any bad impact of such decision
(rather then placing it into mergeable const section, as it was before),
but at least Darwin linker won't complain anymore.
The problem in LLVM is that we don't have special type for string constants
(like gcc does). Even more, we have two separate types: ConstatArray for non-null
strings and ConstantAggregateZero for null stuff.... It's a bit weird :)
llvm-svn: 63142
2009-01-27 22:29:24 +00:00
3789a13c30
Make the Dwarf macro information section optional; CellSPU's assembler
...
doesn't support it. The default is set to 'true', so this should not
impact any other target backends.
llvm-svn: 63058
2009-01-26 22:32:51 +00:00
f9b5ba7bcb
Revert r61415 and r61484. Duncan was correct that these weren't needed.
...
llvm-svn: 61765
2009-01-05 22:53:45 +00:00
56a8bb670f
squash warnings.
...
llvm-svn: 61707
2009-01-05 17:31:22 +00:00
03f2af79b8
Linux wants the FDE initial location and address range to be forced to 32-bit.
...
Darwin doesn't. Make this optional for platforms.
llvm-svn: 61484
2008-12-29 22:12:11 +00:00
d6bd7e9372
Darwin likes for the EH frame to be non-local.
...
llvm-svn: 61420
2008-12-24 08:05:17 +00:00
066b5f6724
GCC doesn't emit DW_EH_PE_sdata4 for the FDE encoding on Darwin. I'm not sure
...
about other platforms.
llvm-svn: 61415
2008-12-24 05:25:49 +00:00
cda011b5ad
Fix bug 3140.
...
Print a single parameter .file directive if we have an ELF target.
llvm-svn: 60480
2008-12-03 11:01:37 +00:00
ac41d9f5d8
Refactor various TargetAsmInfo subclasses' TargetMachine members away
...
adding a TargetMachine member to the base TargetAsmInfo class instead.
llvm-svn: 58624
2008-11-03 18:22:42 +00:00
08d91178e9
Rename isWeakForLinker to mayBeOverridden. Use it
...
instead of hasWeakLinkage in a bunch of optimization
passes.
llvm-svn: 56782
2008-09-29 11:25:42 +00:00
87001fd6fd
Reapply 56585:56589 with proper fix for some gcc versions
...
llvm-svn: 56621
2008-09-25 21:00:33 +00:00
84301390ae
Temporarily backing out 56585:56589 to unbreak the build.
...
llvm-svn: 56607
2008-09-25 07:38:08 +00:00
77aa975bdd
Use crazy template-based inheritance instead of virtual one.
...
llvm-svn: 56585
2008-09-24 22:21:39 +00:00
8e7b93938d
Get rid of ReadOnlySection duplicate
...
llvm-svn: 56582
2008-09-24 22:20:27 +00:00
5906234c1d
Get rid of now unused {Four,Eight,Sixteen}ByteConstantSection
...
llvm-svn: 56580
2008-09-24 22:18:54 +00:00
22db30548d
Get rid of duplicate char*/Section* stuff for TLS sections
...
llvm-svn: 56577
2008-09-24 22:17:06 +00:00
7497762606
Get rid of duplicate char*/Section* DataSection
...
llvm-svn: 56575
2008-09-24 22:16:16 +00:00
f8dc8aac3c
Get rid of duplicate char*/Section* TextSection
...
llvm-svn: 56574
2008-09-24 22:15:21 +00:00
076e905b94
Move actual section printing stuff to AsmPrinter from TAI reducing heap traffic.
...
llvm-svn: 56573
2008-09-24 22:14:23 +00:00
f080225490
Fix logic for not emitting no-dead-strip for some
...
objects in llvm.used (thanks Anton). Makes visible
the magic 'l' prefix for symbols on Darwin which are
to be passed through the assembler, then removed at
linktime (previously all references to this had been
hidden in the ObjC FE code, oh well).
llvm-svn: 55973
2008-09-09 01:21:22 +00:00
2ae5446b62
Add interface for section override. Use this for Sparc, since it should use named BSS section.
...
llvm-svn: 54844
2008-08-16 12:58:12 +00:00
bd890b1faf
Move SLEB/ULEB size calculation routines from AsmPrinter to TargetAsmInfo. This makes JIT asmprinter-free.
...
llvm-svn: 54843
2008-08-16 12:57:46 +00:00
44b4a9a05d
Reduce heap trashing due to std::string construction / concatenation via caching of section flags string representations
...
llvm-svn: 54842
2008-08-16 12:57:07 +00:00
df8c7faf60
Undo most of r54519.
...
llvm-svn: 54534
2008-08-08 17:56:50 +00:00
655fa0fec4
It's not legal to output a GV in a coalesced section if it's used in an ARM PIC relative constantpool.
...
llvm-svn: 54519
2008-08-08 06:56:16 +00:00
8ab2f49536
Provide convenient helpers
...
llvm-svn: 54451
2008-08-07 09:51:54 +00:00
ef643a4850
Select section for constant pool entries
...
llvm-svn: 54448
2008-08-07 09:50:34 +00:00
4fdeb9b2d3
Provide default implementation of different small-sections related stuff
...
llvm-svn: 53920
2008-07-22 17:09:59 +00:00
9cfd2f8e57
Basic support for small sections
...
llvm-svn: 53907
2008-07-22 15:26:53 +00:00
efa4160fcc
TargetAsmInfo::SectionForGlobal showed up in a profile. Simplify it a little.
...
llvm-svn: 53639
2008-07-15 18:37:51 +00:00
56827c1b60
Use only 'subset' of flags
...
llvm-svn: 53323
2008-07-09 13:29:44 +00:00
daee281590
First sketch of special section objects
...
llvm-svn: 53320
2008-07-09 13:28:49 +00:00
577c45dd74
Use isWeakForLinker() hook
...
llvm-svn: 53318
2008-07-09 13:27:59 +00:00
13b9a22fb0
Fix several bugs in named sections handling
...
llvm-svn: 53312
2008-07-09 13:25:46 +00:00
60919583b3
Add hacky way to distinguish named and named sections. This will be generalized in the future.
...
llvm-svn: 53311
2008-07-09 13:25:26 +00:00
d789b7c196
Use 'gnu.linkonce', where needed
...
llvm-svn: 53310
2008-07-09 13:24:55 +00:00
7504c283f2
Fix thinko
...
llvm-svn: 53309
2008-07-09 13:24:38 +00:00
4c37c3ad5b
Provide section selection for X86 ELF targets
...
llvm-svn: 53305
2008-07-09 13:23:08 +00:00
9d6939b5fc
Provide general hook for section name calculation
...
llvm-svn: 53304
2008-07-09 13:22:46 +00:00
ab778022d5
Properly handle linkonce stuff
...
llvm-svn: 53296
2008-07-09 13:19:38 +00:00
7680198798
Provide skeletone code for calculation of section, where global should be emitted into
...
llvm-svn: 53295
2008-07-09 13:19:08 +00:00
3ee57868a5
Use 'llvm-linkonce' consistently
...
llvm-svn: 53294
2008-07-09 13:18:38 +00:00
21539c6d1e
Add default section name resolution routine
...
llvm-svn: 53292
2008-07-09 13:18:02 +00:00
aab504fb19
Constify
...
llvm-svn: 53291
2008-07-09 13:17:36 +00:00
9e4ab5023a
Add code for default section falgs computation
...
llvm-svn: 53290
2008-07-09 13:16:59 +00:00
04fb6bf468
Linux also does not require exception handling
...
moves in order to get correct debug info. Since
I can't imagine how any target could possibly
be any different, I've just stripped out the
option: now all the world's like Darwin!
llvm-svn: 53134
2008-07-04 09:55:48 +00:00
b7bd02be57
Darwin doesn't need exception handling information for the "move" info when
...
debug information is being output, because it's leet!
llvm-svn: 52994
2008-07-01 23:34:48 +00:00
2e052a81fd
Start refactoring of asmprinters: provide a TAI hook, which will select a 'section kind' for a global.
...
llvm-svn: 52868
2008-06-28 13:45:57 +00:00
355b74acc2
Add StringConstantPrefix to control what the
...
assembler names of string constants look like.
llvm-svn: 51909
2008-06-03 18:09:06 +00:00
Duncan Sands