9803abb788
As a first step, emit both the compact unwind and CIE/FDEs for a function.
...
llvm-svn: 139152
2011-09-06 18:37:11 +00:00
eee864520c
Some autoconf tests use module level inline asm to test compiler's handling of
...
.cfi_startproc. e.g. libffi:
$ cat confopt.c
asm (".cfi_startproc\n\t.cfi_endproc");
int main () { return 0; }
Teach MC / dwarf emission to handle these cfi directives which essentially
create an empty frame.
rdar://10017184
llvm-svn: 138504
2011-08-24 22:31:37 +00:00
4d9aa512f8
Emit the __compact_unwind section first. If there are any frames which weren't
...
emitted, emit them next as CIE/FDEs.
llvm-svn: 135807
2011-07-22 21:18:59 +00:00
bbf3b0de8b
Goodbye TargetAsmInfo. This eliminate last bit of CodeGen and Target in llvm-mc.
...
There is still a bit more refactoring left to do in Targets. But we are now very
close to fixing all the layering issues in MC.
llvm-svn: 135611
2011-07-20 19:50:42 +00:00
76792992d6
Add MCObjectFileInfo and sink the MCSections initialization code from
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TargetLoweringObjectFileImpl down to MCObjectFileInfo.
TargetAsmInfo is done to one last method. It's *almost* gone!
llvm-svn: 135569
2011-07-20 05:58:47 +00:00
ada366c691
Micro-opt: Only emit compact unwind if there is a compact unwind encoding to emit.
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llvm-svn: 135452
2011-07-19 00:09:25 +00:00
49bc680bdf
Use the CompactUnwindEncoding from the Frame, if it's defined.
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llvm-svn: 135451
2011-07-19 00:06:12 +00:00
67c033e6b8
Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for
...
better location welcome).
llvm-svn: 135438
2011-07-18 22:29:13 +00:00
d60fa58ba1
Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down
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to MCRegisterInfo. Also initialize the mapping at construction time.
This patch eliminate TargetRegisterInfo from TargetAsmInfo. It's another step
towards fixing the layering violation.
llvm-svn: 135424
2011-07-18 20:57:22 +00:00
a83b37a9db
Move some parts of TargetAsmInfo down to MCAsmInfo. This is not the greatest
...
solution but it is a small step towards removing the horror that is
TargetAsmInfo.
llvm-svn: 135237
2011-07-15 02:09:41 +00:00
9b8605f787
Remove setting the bit for personality function. It should be set by the linker.
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llvm-svn: 135236
2011-07-15 01:42:32 +00:00
c998f71d14
Encode that we have a personality function.
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llvm-svn: 135227
2011-07-15 00:07:31 +00:00
dafd598f05
* If we have an LSDA, we need to mark it in the encoding.
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* The personality function should be encoded as an absolute pointer to the function.
llvm-svn: 135215
2011-07-14 23:34:45 +00:00
c7ac690ba2
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
ee6e776be2
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
b6adf46f62
Add a target hook to encode the compact unwind information.
...
llvm-svn: 134577
2011-07-07 00:54:13 +00:00
7ed5625082
Clean up the #includes.
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llvm-svn: 134557
2011-07-06 22:52:32 +00:00
c737ac1816
Remove tabs.
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llvm-svn: 134212
2011-06-30 23:59:38 +00:00
40cc749788
Improve comment: Show the register the DWARF label is added to.
...
llvm-svn: 134209
2011-06-30 23:47:40 +00:00
2fd8d775df
Add one more comment to the FDE verbose asm output.
...
llvm-svn: 134200
2011-06-30 22:35:49 +00:00
f166ab447e
Add comments to the FDE.
...
llvm-svn: 134196
2011-06-30 22:02:20 +00:00
e7fe47e53b
Add more comments to the ASM output for the CIE's "moves".
...
llvm-svn: 134194
2011-06-30 21:45:12 +00:00
567a1aee85
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
7517466970
* 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
4cdb206e76
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
8fa4ada5cf
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
25fbb92320
Use a reference. Don't make a useless copy of the vector.
...
llvm-svn: 133707
2011-06-23 07:55:41 +00:00
a4b9d1f97b
Formatting changes. No functionality change.
...
llvm-svn: 133706
2011-06-23 07:44:54 +00:00
9af2fa9d1b
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
e8fc92ad46
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
f7cb7ef996
Directly print to a raw_ostream instead of printing to a buffer first.
...
llvm-svn: 133352
2011-06-18 14:42:47 +00:00
8aded86edb
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
de32fa163f
Avoid a gcc warning.
...
llvm-svn: 131161
2011-05-10 22:28:35 +00:00
99f6735532
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
d0d2354258
The EH symbols are only needed in eh_frame, not debug_frame.
...
llvm-svn: 131146
2011-05-10 19:51:53 +00:00
27390b4a0e
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
1ecb12fc57
Add support for producing .deubg_frame sections.
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llvm-svn: 131121
2011-05-10 03:54:12 +00:00
b6444c0401
Small cleanups.
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llvm-svn: 131120
2011-05-10 03:26:21 +00:00
0e130d1d37
Remove unused argument.
...
llvm-svn: 131118
2011-05-10 03:01:39 +00:00
392445823d
Eliminate an unused line to fix a warning.
...
llvm-svn: 131078
2011-05-08 23:19:04 +00:00
ab39c63538
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
bcabcdcedd
Switch Darwin to the generic CIE/FDE printer.
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llvm-svn: 131031
2011-05-06 22:29:04 +00:00
f6daf94ab2
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
750cb61553
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
fd05785324
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
6a85f9b42e
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
68067664c3
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
7c7151512c
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
6bd6a70837
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
c5dac4df2e
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
Bill Wendling