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288 Commits

Author SHA1 Message Date
Evan Cheng
3d2be55d6c Unfortunately several files in MC are badly violating layering rule by using 
TargetAsmInfo, which in turn pulls in TargetRegisterInfo, etc. :-( There are
other cases of violations, but this is probably the worst.

This patch is but one small step towards fixing this. 500 more steps to go. :-(

llvm-svn: 135131
 2011-07-14 05:43:07 +00:00
Bill Wendling
e6de1eeb86 Don't emit the FDE end label if the last thing emitted was a compact unwind and 
not the FDE

llvm-svn: 135020
 2011-07-13 00:49:09 +00:00
Bill Wendling
ba39846c2b Add a target hook to encode the compact unwind information. 
llvm-svn: 134577
 2011-07-07 00:54:13 +00:00
Bill Wendling
fd3f4e7040 Clean up the #includes. 
llvm-svn: 134557
 2011-07-06 22:52:32 +00:00
Bill Wendling
770794cc60 Remove tabs. 
llvm-svn: 134212
 2011-06-30 23:59:38 +00:00
Bill Wendling
995ebcfd4c Improve comment: Show the register the DWARF label is added to. 
llvm-svn: 134209
 2011-06-30 23:47:40 +00:00
Bill Wendling
80c39ac9a5 Add one more comment to the FDE verbose asm output. 
llvm-svn: 134200
 2011-06-30 22:35:49 +00:00
Bill Wendling
834cb876e6 Add comments to the FDE. 
llvm-svn: 134196
 2011-06-30 22:02:20 +00:00
Bill Wendling
eace9970bd Add more comments to the ASM output for the CIE's "moves". 
llvm-svn: 134194
 2011-06-30 21:45:12 +00:00
Bill Wendling
7a94c43c7a Add comments to the ASM output to help understand the compact unwind and CIE tables. 
llvm-svn: 134191
 2011-06-30 21:25:51 +00:00
Bill Wendling
3080b09d31 * Use the proper size to output the range size. 
* Rough in the compact encoding part.

llvm-svn: 134119
 2011-06-30 00:30:52 +00:00
Bill Wendling
5a7a3562e0 Stupid error: If the LSDA and Personality functions aren't there, emit 0 instead 
of the encoding.

llvm-svn: 134117
 2011-06-29 23:53:16 +00:00
Bill Wendling
d394aea75e We don't want to use relocations inside the compact unwind section. Just use the 
symbols instead.

llvm-svn: 134115
 2011-06-29 23:49:12 +00:00
Bill Wendling
4d12748388 Use a reference. Don't make a useless copy of the vector. 
llvm-svn: 133707
 2011-06-23 07:55:41 +00:00
Bill Wendling
e7fc1a8d9e Formatting changes. No functionality change. 
llvm-svn: 133706
 2011-06-23 07:44:54 +00:00
Bill Wendling
42866c8944 Use the presence of the __compact_unwind section to indicate that a target 
supports compact unwind info instead of having a separate flag indicating this.

llvm-svn: 133685
 2011-06-23 05:13:28 +00:00
Bill Wendling
538dc8cc6f Some skeleton code to emit the compact unwind. If the information is unable to 
be emitted in a compact way, we then default to emitting a CIE and FDE.

llvm-svn: 133676
 2011-06-23 01:06:23 +00:00
Benjamin Kramer
1525b80eef Directly print to a raw_ostream instead of printing to a buffer first. 
llvm-svn: 133352
 2011-06-18 14:42:47 +00:00
Jim Grosbach
909aff492f No reason not to allow defining the CFA as a reg w/ offset zero. 
llvm-svn: 131760
 2011-05-20 21:50:09 +00:00
Rafael Espindola
ce84130f0f Avoid a gcc warning. 
llvm-svn: 131161
 2011-05-10 22:28:35 +00:00
Rafael Espindola
e8890f4b16 On MachO, unlike ELF, there should be no relocation to produce the CIE pointer. 
llvm-svn: 131149
 2011-05-10 20:59:42 +00:00
Rafael Espindola
ec3d43391f The EH symbols are only needed in eh_frame, not debug_frame. 
llvm-svn: 131146
 2011-05-10 19:51:53 +00:00
Rafael Espindola
ff4443c82c In a debug_frame the cfi offset is to the start of the debug_frame section! 
llvm-svn: 131129
 2011-05-10 15:20:23 +00:00
Rafael Espindola
b7c942431f Add support for producing .deubg_frame sections. 
llvm-svn: 131121
 2011-05-10 03:54:12 +00:00
Rafael Espindola
566d48be51 Small cleanups. 
llvm-svn: 131120
 2011-05-10 03:26:21 +00:00
Rafael Espindola
dce419e62b Remove unused argument. 
llvm-svn: 131118
 2011-05-10 03:01:39 +00:00
NAKAMURA Takumi
b8bfce2165 Eliminate an unused line to fix a warning. 
llvm-svn: 131078
 2011-05-08 23:19:04 +00:00
Rafael Espindola
0baeced1f4 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.

llvm-svn: 131067
 2011-05-08 14:35:21 +00:00
Rafael Espindola
003a45810d Switch Darwin to the generic CIE/FDE printer. 
llvm-svn: 131031
 2011-05-06 22:29:04 +00:00
Daniel Dunbar
3cd9c46c3a MCDwarf: Don't save Twine to local variable, this is almost never safe to do 
(and should thus never be done).
 - Should fix a crash on win32.

llvm-svn: 130793
 2011-05-03 21:33:37 +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
2f2c3bf31f Simplify the handling of pcrel relocations on ELF. Now we do the right thing 
for all symbol differences and can drop the old EmitPCRelSymbolValue
method.

This also make getExprForFDESymbol on ELF equal to the one on MachO, and it
can be made non-virtual.

llvm-svn: 130634
 2011-05-01 03:50:49 +00:00
Rafael Espindola
13b74fd203 Avoid some uses of .uleb128. This is a small speedup and more importantly 
lets this code be used when producing assembly code for old assemblers without
uleb support.

llvm-svn: 130544
 2011-04-29 21:50:57 +00:00
Rafael Espindola
6c6e1622a8 Last bit by bit compatibility patch to MCDwarf.cpp: If a FDE with no LSDA is 
assigned to a CIE that requires one, just output a 0.

llvm-svn: 130472
 2011-04-29 03:06:29 +00:00
Rafael Espindola
a664fdf4cd Add an alternative implementation of CIE and FDE emission that outputs them 
in the same order as the one in CodeGen.

llvm-svn: 130471
 2011-04-29 02:42:28 +00:00
Rafael Espindola
be5cb08cf8 Add the getExprForFDESymbol method that responsible for computing the 
expressions used in the FDE to refer to symbols.

llvm-svn: 130437
 2011-04-28 21:04:39 +00:00
Rafael Espindola
f75a67d261 Add a getExprForPersonalitySymbol method to MCAsmInfo. Use it when 
converting the symbol passed to .cfi_personality into bytes is the file.

llvm-svn: 130400
 2011-04-28 16:09:09 +00:00
Rafael Espindola
4f9a76ab0b Mark the EH symbol global or weak if the corresponding function is. 
llvm-svn: 130397
 2011-04-28 12:50:37 +00:00
Rafael Espindola
7bc992c8d3 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).

llvm-svn: 130379
 2011-04-28 04:04:14 +00:00
Rafael Espindola
d63b896d05 Produce the EH_frame# symbols if needed. 
llvm-svn: 130378
 2011-04-28 03:26:11 +00:00
Rafael Espindola
d2ef63ca76 Forward isFunctionEHFrameSymbolPrivate. If it is false, produce the foo.eh 
symbols.

llvm-svn: 130375
 2011-04-28 02:46:42 +00:00
Rafael Espindola
7728a01105 Force some values to be absolute and align based on the FDE pointers size. A small 
step towards using .cfi_* on OS X.

llvm-svn: 130273
 2011-04-27 01:43:49 +00:00
Chandler Carruth
d09040ad66 Delete the other unused variable in this function. Sorry I missed this 
the first time through.

llvm-svn: 129969
 2011-04-22 01:29:18 +00:00
Chandler Carruth
a0a38b7d6e Remove an unused variable from a function. This is a likely cut-paste-o. 
Silences GCC warning.

I wonder why Clang doesn't warn on this...

llvm-svn: 129968
 2011-04-22 01:21:06 +00:00
Rafael Espindola
717fc5112a Compute the size of the FDE encoding instead of hard coding it. Update 
X8664_ELFTargetObjectFile::getFDEEncoding to match reality.

llvm-svn: 129959
 2011-04-22 00:08:43 +00:00
Rafael Espindola
856ed14418 Remove unused argument. 
llvm-svn: 129955
 2011-04-21 23:39:26 +00:00
Rafael Espindola
1afc1304c7 Don't pass address spaces to EmitULEB128IntValue. 
llvm-svn: 129953
 2011-04-21 23:26:40 +00:00
Rafael Espindola
9f6146c464 Remove LastOffset from the asm parser. 
llvm-svn: 129378
 2011-04-12 18:53:30 +00:00
Rafael Espindola
5c5bb3e9a6 Fix the case of a .cfi_rel_offset before any .cfi_def_cfa_offset. 
llvm-svn: 129362
 2011-04-12 16:12:03 +00:00
Rafael Espindola
7c4de15c7b Implement .cfi_same_value. 
llvm-svn: 129361
 2011-04-12 15:31:05 +00:00