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116 Commits

Author SHA1 Message Date
Bill Wendling
ec779bc283 Add a flag that indicates whether a target supports compact unwind info or not. 
llvm-svn: 133662
 2011-06-22 23:16:51 +00:00
Bill Wendling
72c8521466 Add a __LD,__compact_unwind section. 
If the linker supports it, this will hold the CIE and FDE information in a
compact format. The implementation of the compact unwinding emission is coming
soon.

llvm-svn: 133658
 2011-06-22 22:22:24 +00:00
Jay Foad
9dc6571cbc Fix a FIXME by making GlobalVariable::getInitializer() return a 
const Constant *.

llvm-svn: 133400
 2011-06-19 18:37:11 +00:00
Bill Wendling
7a13f3bde3 Remove a flag that would set the ".eh" symbol as .globl. MachO was the only one 
who used this flag, and it now emits CFI and doesn't emit this anymore. All
other targets left this flag "false".
<rdar://problem/8486371>

llvm-svn: 130918
 2011-05-05 06:49:15 +00:00
Rafael Espindola
eb5d0cb4f4 GCC uses a different encoding of pointers in the FDE when using 
-fno-dwarf2-cfi-asm. Implement the same behavior.

llvm-svn: 130637
 2011-05-01 04:49:54 +00:00
Rafael Espindola
36e419b524 Remove unnecessary argument. 
llvm-svn: 130343
 2011-04-27 23:17:57 +00:00
Rafael Espindola
0525497a16 Rename getPersonalityPICSymbol to getCFIPersonalitySymbol, document it, and 
give it a bit more responsibility. Also implement it for MachO.

If hacked to use cfi, 32 bit MachO will produce

.cfi_personality 155, L___gxx_personality_v0$non_lazy_ptr

and 64 bit will produce

.cfi_presonality ___gxx_personality_v0

The general idea is that .cfi_personality gets passed the final symbol. It is
up to codegen to produce it if using indirect representation (like 32 bit
MachO), but it is up to MC to decide which relocations to create.

llvm-svn: 130341
 2011-04-27 23:08:15 +00:00
Rafael Espindola
09e9797728 Remove unused arguments. 
llvm-svn: 129844
 2011-04-20 03:08:09 +00:00
Francois Pichet
dd7a5695e3 MSVC needs the return 0 to compile. 
llvm-svn: 129640
 2011-04-16 13:59:23 +00:00
Rafael Espindola
9e5aaa3b78 Put each personality function in a section. This fixes the gnu ld warning: 
error in foo.o; no .eh_frame_hdr table will be created.

llvm-svn: 129635
 2011-04-16 03:51:21 +00:00
Rafael Espindola
99831068c8 Add 129518 back with a fix for when we are producing eh just because of debug info. 
Change ELF systems to use CFI for producing the EH tables. This reduces the
size of the clang binary in Debug builds from 690MB to 679MB.

llvm-svn: 129571
 2011-04-15 15:11:06 +00:00
NAKAMURA Takumi
7aed456653 Revert r129518, "Change ELF systems to use CFI for producing the EH tables. This reduces the" 
It broke several builds.

llvm-svn: 129557
 2011-04-15 03:35:57 +00:00
Rafael Espindola
d5eed657e2 Change ELF systems to use CFI for producing the EH tables. This reduces the 
size of the clang binary in Debug builds from 690MB to 679MB.

llvm-svn: 129518
 2011-04-14 15:18:53 +00:00
Rafael Espindola
aefd549139 Delay the creation of eh_frame so that the user can change the defaults. 
Add support for SHT_X86_64_UNWIND.

llvm-svn: 124059
 2011-01-23 05:43:40 +00:00
Chris Lattner
047388c197 minor change to rafael's recent patches: if something is 
constant but requires a unique address, we can still put it in a
readonly section, just not a mergable one.

llvm-svn: 123711
 2011-01-18 01:23:44 +00:00
Rafael Espindola
7933fffe38 Only put unnamed_addr constants in mergeable sections. Fixes PR8297. 
llvm-svn: 123585
 2011-01-16 17:19:34 +00:00
Chris Lattner
0ebcc18dec the latest assembler that runs on powerpc 10.4 machines doesn't 
support aligned comm.  Detect when compiling for 10.4 and don't
emit an alignment for comm.  THis will hopefully fix PR8198.

llvm-svn: 114817
 2010-09-27 06:44:54 +00:00
Dan Gohman
0b5b93b20d Eliminate unnecessary uses of getZExtValue(). 
llvm-svn: 106279
 2010-06-18 14:22:04 +00:00
Chris Lattner
80b41881bc rename llvm::llvm_report_error -> llvm::report_fatal_error 
llvm-svn: 100709
 2010-04-07 22:58:41 +00:00
Chris Lattner
962d3d700b fix GetOrCreateTemporarySymbol to require a name, clients 
should use CreateTempSymbol() if they don't care about the
name.

llvm-svn: 98712
 2010-03-17 05:41:18 +00:00
Chris Lattner
01e70df9b2 finally give Mangler a getSymbol method, which returns an MCSymbol 
for a global instead of messing around with string buffers.

llvm-svn: 98366
 2010-03-12 18:55:20 +00:00
Chris Lattner
07e124cec5 make TargetLoweringObjectFile::getExprForDwarfReference 
just make unnamed temp symbols instead of having to come
up with its own names.

llvm-svn: 98324
 2010-03-12 01:56:43 +00:00
Chris Lattner
5aefaeb42e fix a fixme in TargetLoweringObjectFile::getExprForDwarfReference 
where we used ot create an MCSymbol for ".".  Now emit an assembler
temporary label and reference it instead of "." textually.

rdar://7739457

llvm-svn: 98292
 2010-03-11 21:55:20 +00:00
Chris Lattner
1ce9dfd498 rename getSymbolForDwarf* to getExprForDwarf* since it returns 
an MCExpr and not an MCSymbol.  Change it to take an MCStreamer,
which is currently unused.

No functionality change.

llvm-svn: 98278
 2010-03-11 19:41:58 +00:00
Chris Lattner
e34dde1e83 move three lowering hooks from MAI to TLOF and make one of them 
semantic instead of syntactic.  This completes MCization of
darwin/x86[-64]!

llvm-svn: 98145
 2010-03-10 07:20:42 +00:00
Chris Lattner
ed0b8d36e4 set the temporary bit on MCSymbols correctly. 
llvm-svn: 98124
 2010-03-10 02:25:11 +00:00
Bill Wendling
964b01232c Make error statement more personal. 
llvm-svn: 96410
 2010-02-16 22:47:14 +00:00
Anton Korobeynikov
ef1862e256 Move TLOF implementations to libCodegen to resolve layering violation. 
llvm-svn: 96288
 2010-02-15 22:37:53 +00:00
Anton Korobeynikov
4d16d87eb1 Add suffix for stubs, so we won't have name clashes with private symbols. 
llvm-svn: 96286
 2010-02-15 22:36:26 +00:00
Anton Korobeynikov
dccd240998 Preliminary patch to improve dwarf EH generation - Hooks to return Personality / FDE / LSDA / TType encoding depending on target / options (e.g. code model / relocation model) - MCIzation of Dwarf EH printer to use encoding information - Stub generation for ELF target (needed for indirect references) - Some other small changes here and there 
llvm-svn: 96285
 2010-02-15 22:35:59 +00:00
Benjamin Kramer
13b3fa1f36 Simplify some uses of str(n)cmp with StringRef. 
llvm-svn: 94189
 2010-01-22 18:21:23 +00:00
Chris Lattner
15e2a64ec2 stop using the .lcomm pseudoop on darwin, instead, directly use the 
.zerofill directive.  Streamerize its generation.

llvm-svn: 93868
 2010-01-19 06:25:51 +00:00
Chris Lattner
63ef960b83 make TLOF subclassify BSS based on linkage type into private, external 
and everything else (weak).

llvm-svn: 93846
 2010-01-19 04:15:51 +00:00
Chris Lattner
c42d723862 fix a significant difference between llvm and gcc on ELF systems: 
GCC would put weak zero initialized mutable data in the .bss section,
we would put it into a crasy '.gnu.linkonce.b.test,"aw",@nobits' 
section.  Fixing this will allow simplifications next up.

llvm-svn: 93844
 2010-01-19 03:06:01 +00:00
Chris Lattner
77f12b9ee0 introduce a section kind for common linkage. Use this to slightly 
simplify and commonize some of the asmprinter logic for globals.

This also avoids printing the MCSection for .zerofill, which broke
the llvm-gcc build.

llvm-svn: 93843
 2010-01-19 02:48:26 +00:00
Chris Lattner
816fcd1287 Cleanup handling of .zerofill on darwin: 
1. TargetLoweringObjectFileMachO should decide if something
   goes in zerofill instead of having every target do it.
2. TargetLoweringObjectFileMachO should assign said symbols to
   the right MCSection, the asmprinters should just emit to the
   right section.
3. Since all zerofill stuff goes through mcstreamer anymore,
   MAI can have a bool "haszerofill" instead of having the textual
   directive to emit.

llvm-svn: 93838
 2010-01-19 02:09:44 +00:00
Chris Lattner
f7c6508544 Get MCSymbol out of the mangling business, and move all the logic 
to Mangler.  Now MCSymbol just decides whether to slap quotes around
a symbol when printing it.

This also fixes some weirdness where two MCSymbols could be created
for the same symbol, if one needed to be mangled and got mangled to
the other one.

llvm-svn: 93690
 2010-01-17 19:23:46 +00:00
Chris Lattner
51e8abe640 move the mangler into libtarget from vmcore. 
llvm-svn: 93664
 2010-01-16 21:57:06 +00:00
Chris Lattner
e4a8737985 fix build failure. 
llvm-svn: 93628
 2010-01-16 03:38:27 +00:00
Chris Lattner
a00f220023 remove a couple of actively incorrect uses of getMangledName. 
llvm-svn: 93627
 2010-01-16 02:16:09 +00:00
Chris Lattner
4ce6464609 fix ELF section mangling stuff for weak symbols to not use 
obsolete Mangler interfaces.

llvm-svn: 93356
 2010-01-13 21:29:21 +00:00
Chris Lattner
b255aee77a Use the GV version of getNameWithPrefix in TargetLoweringObjectFileCOFF:: 
SelectSectionForGlobal, unbreaking weak globals with no-name.

llvm-svn: 93336
 2010-01-13 19:19:17 +00:00
Chris Lattner
29a0ff2e70 add a fixme, ELF MCSection isn't quite right and weak unnamed globals are broken 
on linux (even though they are pointless, they shouldn't ICE).

llvm-svn: 93308
 2010-01-13 08:02:14 +00:00
Chris Lattner
f2090cf7fd eliminate some uses of Mangler::makeNameProper. 
llvm-svn: 93305
 2010-01-13 07:56:59 +00:00
Chris Lattner
3c2fad1fc6 change Mangler::makeNameProper to return its result in a SmallVector 
instead of returning it in an std::string.  Based on this change:

1. Change TargetLoweringObjectFileCOFF::getCOFFSection to take a StringRef
2. Change a bunch of targets to call makeNameProper with a smallstring,
   making several of them *much* more efficient.
3. Rewrite Mangler::makeNameProper to not build names and then prepend
   prefixes, not use temporary std::strings, and to avoid other crimes.

llvm-svn: 93298
 2010-01-13 06:38:18 +00:00
Eric Christopher
1d452e5c87 We need to put any kind of data with a relocation into a 
not-readonly segment on darwin.

llvm-svn: 92933
 2010-01-07 19:44:05 +00:00
Bill Wendling
fcbf6174ab Reverting the EH table patches. 
$ svn merge -c -89279 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r89279 into '.':
U    lib/CodeGen/AsmPrinter/DwarfException.cpp
U    lib/Target/TargetLoweringObjectFile.cpp
$ svn merge -c -89270 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r89270 into '.':
G    lib/CodeGen/AsmPrinter/DwarfException.cpp
G    lib/Target/TargetLoweringObjectFile.cpp

llvm-svn: 89379
 2009-11-19 19:21:09 +00:00
Bill Wendling
b396532e98 The "ReadOnlyWithRel" enum seems to apply more to what Darwin does with the EH 
exception table than DataRel.

llvm-svn: 89279
 2009-11-19 00:09:14 +00:00
Bill Wendling
5ab3ea88a2 Attempt #2: 
Place the EH table in the __TEXT section on MachO. It saves space.

llvm-svn: 89270
 2009-11-18 23:18:46 +00:00
Chris Lattner
8abcfed7c7 add some missing #includes 
llvm-svn: 86367
 2009-11-07 09:20:54 +00:00