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101 Commits

Author SHA1 Message Date
Bill Wendling
d8ab8e9707 As a first step, emit both the compact unwind and CIE/FDEs for a function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139152 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-06 18:37:11 +00:00
Evan Cheng
5fbe5e783e 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138504 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-24 22:31:37 +00:00
Bill Wendling
1424c3c3e6 Emit the __compact_unwind section first. If there are any frames which weren't 
emitted, emit them next as CIE/FDEs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135807 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-22 21:18:59 +00:00
Evan Cheng
203576aa0c 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135611 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-20 19:50:42 +00:00
Evan Cheng
e76a33b956 Add MCObjectFileInfo and sink the MCSections initialization code from 
TargetLoweringObjectFileImpl down to MCObjectFileInfo.

TargetAsmInfo is done to one last method. It's *almost* gone!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135569 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-20 05:58:47 +00:00
Bill Wendling
6c2f7e2398 Micro-opt: Only emit compact unwind if there is a compact unwind encoding to emit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135452 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-19 00:09:25 +00:00
Bill Wendling
e52e3f2c02 Use the CompactUnwindEncoding from the Frame, if it's defined. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135451 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-19 00:06:12 +00:00
Evan Cheng
2d28617de2 Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for 
better location welcome).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135438 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-18 22:29:13 +00:00
Evan Cheng
0e6a052331 Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down 
to MCRegisterInfo. Also initialize the mapping at construction time.

This patch eliminate TargetRegisterInfo from TargetAsmInfo. It's another step
towards fixing the layering violation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135424 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-18 20:57:22 +00:00
Evan Cheng
1be0e271a0 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135237 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-15 02:09:41 +00:00
Bill Wendling
833ce06c8f Remove setting the bit for personality function. It should be set by the linker. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135236 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-15 01:42:32 +00:00
Bill Wendling
79a6a48851 Encode that we have a personality function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135227 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-15 00:07:31 +00:00
Bill Wendling
4bb5b03712 * If we have an LSDA, we need to mark it in the encoding. 
* The personality function should be encoded as an absolute pointer to the function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135215 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-14 23:34:45 +00:00
Evan Cheng
672b93a332 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. :-(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135131 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-14 05:43:07 +00:00
Bill Wendling
8440fe2166 Don't emit the FDE end label if the last thing emitted was a compact unwind and 
not the FDE


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135020 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 00:49:09 +00:00
Bill Wendling
6a6b8c3e96 Add a target hook to encode the compact unwind information. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134577 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-07 00:54:13 +00:00
Bill Wendling
2b2dc7c4be Clean up the #includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134557 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-06 22:52:32 +00:00
Bill Wendling
c3882164cb Remove tabs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134212 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-30 23:59:38 +00:00
Bill Wendling
e08d4335ad Improve comment: Show the register the DWARF label is added to. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134209 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-30 23:47:40 +00:00
Bill Wendling
d221cd676b Add one more comment to the FDE verbose asm output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134200 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-30 22:35:49 +00:00
Bill Wendling
2541c41f3e Add comments to the FDE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134196 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-30 22:02:20 +00:00
Bill Wendling
efd24ddbff Add more comments to the ASM output for the CIE's "moves". 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134194 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-30 21:45:12 +00:00
Bill Wendling
3c163cfa60 Add comments to the ASM output to help understand the compact unwind and CIE tables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134191 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-30 21:25:51 +00:00
Bill Wendling
9287a6eef3 * Use the proper size to output the range size. 
* Rough in the compact encoding part.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134119 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-30 00:30:52 +00:00
Bill Wendling
4498d39680 Stupid error: If the LSDA and Personality functions aren't there, emit 0 instead 
of the encoding.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134117 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-29 23:53:16 +00:00
Bill Wendling
9056e90320 We don't want to use relocations inside the compact unwind section. Just use the 
symbols instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134115 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-29 23:49:12 +00:00
Bill Wendling
5b46e8e6b8 Use a reference. Don't make a useless copy of the vector. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133707 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-23 07:55:41 +00:00
Bill Wendling
a8c9e6a943 Formatting changes. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133706 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-23 07:44:54 +00:00
Bill Wendling
4c0c446d74 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133685 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-23 05:13:28 +00:00
Bill Wendling
e3cd13f0e2 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133676 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-23 01:06:23 +00:00
Benjamin Kramer
dcf0e0c44b Directly print to a raw_ostream instead of printing to a buffer first. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133352 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-18 14:42:47 +00:00
Jim Grosbach
958b68140e No reason not to allow defining the CFA as a reg w/ offset zero. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131760 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-20 21:50:09 +00:00
Rafael Espindola
9989ef43fa Avoid a gcc warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131161 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-10 22:28:35 +00:00
Rafael Espindola
e3a0e987f3 On MachO, unlike ELF, there should be no relocation to produce the CIE pointer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131149 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-10 20:59:42 +00:00
Rafael Espindola
12f197b3bc The EH symbols are only needed in eh_frame, not debug_frame. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131146 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-10 19:51:53 +00:00
Rafael Espindola
0d450dc659 In a debug_frame the cfi offset is to the start of the debug_frame section! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131129 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-10 15:20:23 +00:00
Rafael Espindola
40a7dbbeff Add support for producing .deubg_frame sections. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131121 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-10 03:54:12 +00:00
Rafael Espindola
774466a8a5 Small cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131120 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-10 03:26:21 +00:00
Rafael Espindola
9f270dadd4 Remove unused argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131118 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-10 03:01:39 +00:00
NAKAMURA Takumi
8a1f2b2bcf Eliminate an unused line to fix a warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131078 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-08 23:19:04 +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
Rafael Espindola
be91117c4d Switch Darwin to the generic CIE/FDE printer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131031 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-06 22:29:04 +00:00
Daniel Dunbar
b47426b4de 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130793 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-03 21:33:37 +00:00
Rafael Espindola
5426a9ee37 GCC uses a different encoding of pointers in the FDE when using 
-fno-dwarf2-cfi-asm. Implement the same behavior.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130637 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-01 04:49:54 +00:00
Rafael Espindola
debd7e4e8b 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130634 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-01 03:50:49 +00:00
Rafael Espindola
1f6c87554a 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130544 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 21:50:57 +00:00
Rafael Espindola
4892dff07e 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130472 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 03:06:29 +00:00
Rafael Espindola
9099813bd5 Add an alternative implementation of CIE and FDE emission that outputs them 
in the same order as the one in CodeGen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130471 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 02:42:28 +00:00
Rafael Espindola
a0057ca13f Add the getExprForFDESymbol method that responsible for computing the 
expressions used in the FDE to refer to symbols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130437 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-28 21:04:39 +00:00
Rafael Espindola
bfa27cc5d7 Add a getExprForPersonalitySymbol method to MCAsmInfo. Use it when 
converting the symbol passed to .cfi_personality into bytes is the file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130400 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-28 16:09:09 +00:00