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1181 Commits

Author SHA1 Message Date
Rafael Espindola fc8223670a Add r130623 back now that ELF has been fixed to work with -fno-dwarf2-cfi-asm. 
llvm-svn: 130658
 2011-05-01 15:44:13 +00:00
Rafael Espindola 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
Rafael Espindola 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
Rafael Espindola b7c2286055 Revert the previous patch while I figure out how to make llvm-gcc 
less agressive about disabling cfi on linux :-(

llvm-svn: 130626
 2011-04-30 23:03:44 +00:00
Rafael Espindola 5265bc483e Enable CFI on OS X. 
Currently the output should be almost identical to the one produced by CodeGen
to make the transition easier.

The only two differences I know of are:

* Some files get an extra advance loc of size 0. This will be fixed when
relaxations are enabled.
* The optimization of declaring an EH symbol as an external variable is not
implemented. This is a subset of adding the nounwind attribute, so we if really
this at -O0 we should probably do it at the IL level.

llvm-svn: 130623
 2011-04-30 22:29:54 +00:00
Rafael Espindola bde52bca69 Implement MCAsmStreamer::EmitEHSymAttributes. Doing this in the asm streamer 
is a bit ugly, but doing it on the base MCStreamer would be redundant
with the object streamer which does it using SD.

llvm-svn: 130611
 2011-04-30 16:34:57 +00:00
Rafael Espindola 0b474c2d15 Handle PrivateExtern eh symbols. 
llvm-svn: 130609
 2011-04-30 16:22:46 +00:00
Rafael Espindola a3181d12c6 Add all the plumbing needed for MC to expand cfi to the old tables in 
the final assembly. It is the same technique used when targeting
assemblers that don't support .loc.

llvm-svn: 130587
 2011-04-30 03:44:37 +00:00
Rafael Espindola 1d1eced025 Implement MCAsmStreamer::EmitDwarfAdvanceFrameAddr. 
llvm-svn: 130585
 2011-04-30 03:21:04 +00:00
Rafael Espindola 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
Rafael Espindola 6c961e1b75 Implement MCAsmStreamer::EmitCFIDefCfa. 
llvm-svn: 130543
 2011-04-29 21:41:06 +00:00
Daniel Dunbar 72032861c6 MCAsmLayout: Add support for computing the symbol offset of variables. Not 
currently used, because variables don't get reported as being "defined".

llvm-svn: 130524
 2011-04-29 18:20:20 +00:00
Daniel Dunbar bea7b93c88 MC: Change variable symbols to be recognized as defined, by assigning their sections based on FindAssociatedSection(). 
llvm-svn: 130523
 2011-04-29 18:20:17 +00:00
Daniel Dunbar b200f93125 MC/Mach-O: Update getSymbolAddress() to support evaluation of variables. 
llvm-svn: 130522
 2011-04-29 18:13:42 +00:00
Daniel Dunbar 29ba55cfe4 MC/Mach-O: Allow emission of relocations for variables in some more cases. 
llvm-svn: 130520
 2011-04-29 18:10:47 +00:00
Daniel Dunbar b9c2b6c50d MC/Mach-O: Find section ordinal's by looking at the symbol, instead of assuming they are present in a fragment. 
llvm-svn: 130519
 2011-04-29 18:07:43 +00:00
Devang Patel 124ae13421 Hoist MCLineEntry construction AsmPrinter so that anyone who derives from AsmPrinter can have line number entries. 
PR 9810

llvm-svn: 130518
 2011-04-29 18:00:54 +00:00
Daniel Dunbar dc3e4cc5ed MCExpr: Add FindAssociatedSection, which attempts to mirror the 'as' semantics 
that associate sections with expressions.

llvm-svn: 130517
 2011-04-29 18:00:03 +00:00
Daniel Dunbar 1bf128eaeb MC/AsmParser: Generalize a check. 
llvm-svn: 130515
 2011-04-29 17:53:11 +00:00
Rafael Espindola 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
Rafael Espindola 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
Rafael Espindola 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
Rafael Espindola 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
Rafael Espindola 349c3298da 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 2eeee8cfef 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 bf60fb0a37 Produce the EH_frame# symbols if needed. 
llvm-svn: 130378
 2011-04-28 03:26:11 +00:00
Rafael Espindola 96b07932a3 Forward isFunctionEHFrameSymbolPrivate. If it is false, produce the foo.eh 
symbols.

llvm-svn: 130375
 2011-04-28 02:46:42 +00:00
Rafael Espindola 27c0c9bb87 Factor a bit of code to MCStreamer::EmitLabel. Keep track of the last 
non private symbol. This will be use for handling

foo:
  .cfi_startproc
  ...

On OS X where we have to create a foo.eh symbol.

llvm-svn: 130305
 2011-04-27 15:21:19 +00:00
Rafael Espindola ae124da625 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
Rafael Espindola 3584ab6cc6 No relocation produces a SLEB or ULEB, make sure they are handled in MC. 
llvm-svn: 130181
 2011-04-26 02:17:58 +00:00
Sebastian Redl 1b86ea80bb Give MC/MCDisassembler/Disassembler.h a header guard. 
llvm-svn: 130096
 2011-04-24 15:46:56 +00:00
Jay Foad 1a180156b6 Remove unused STL header includes. 
llvm-svn: 130068
 2011-04-23 19:53:52 +00:00
Chandler Carruth bab81b9797 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 ea41470726 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 5395f44fe8 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 6aea59268a Remove unused argument. 
llvm-svn: 129955
 2011-04-21 23:39:26 +00:00
Rafael Espindola ea61f22dd3 Don't pass address spaces to EmitULEB128IntValue. 
llvm-svn: 129953
 2011-04-21 23:26:40 +00:00
Rafael Espindola c3dc486752 Fix relative relocations. This is sufficient for running the rust testsuite with 
MC :-)

llvm-svn: 129923
 2011-04-21 18:36:50 +00:00
Rafael Espindola ed16477cb9 Behave like gnu as when a relocation crosses sections. 
llvm-svn: 129850
 2011-04-20 14:01:45 +00:00
Sean Callanan d897f39797 Made the MC disassembler check before accessing 
MCInst operands for ARM.  This allows it to be
more tolerant of malformed MCInsts or incorrect
instruction metadata.

llvm-svn: 129840
 2011-04-20 00:43:34 +00:00
Eli Friedman b2545fbc2a malloc elimination: it's a bad idea to use raw_svector_ostream on a 
small heap-allocated SmallString because it unconditionally forces a malloc.

(Revised version of r129688, with the necessary flush() call.)

llvm-svn: 129716
 2011-04-18 20:54:46 +00:00
Devang Patel 17740e70d5 Reduce clutter in asm output. Do not emit source location as comment for each instruction. 
llvm-svn: 129715
 2011-04-18 20:26:49 +00:00
Eli Friedman 3f8ecf5cc5 Revert r129688; it's breaking buildbots. 
llvm-svn: 129689
 2011-04-18 05:54:54 +00:00
Eli Friedman 2dc287a147 More malloc elimination: it's a bad idea to use raw_svector_ostream on a 
small heap-allocated SmallString because it unconditionally forces a malloc.

llvm-svn: 129688
 2011-04-18 05:38:58 +00:00
Eli Friedman 0e40208d7b Make the StringMaps attached to MCContext use the MCContext's allocator; 
reduces the number of calls to malloc().

llvm-svn: 129687
 2011-04-18 05:02:31 +00:00
Chris Lattner 0ab5e2cded Fix a ton of comment typos found by codespell. Patch by 
Luis Felipe Strano Moraes!

llvm-svn: 129558
 2011-04-15 05:18:47 +00:00
Rafael Espindola 539d96f01d Be consistent about being virtual and returning void in the cfi methods. 
Implement the ones that were missing in the asm streamer.

llvm-svn: 129413
 2011-04-12 23:59:07 +00:00
Rafael Espindola fd794affe5 Remove LastOffset from the asm parser. 
llvm-svn: 129378
 2011-04-12 18:53:30 +00:00
Rafael Espindola 1ec0f46169 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 2e1c9d2188 Implement .cfi_same_value. 
llvm-svn: 129361
 2011-04-12 15:31:05 +00:00