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Author SHA1 Message Date
Eli Friedman
8a3264ad48 Revert r133004 ; it's breaking nightly tests. 
llvm-svn: 133007
 2011-06-14 19:30:33 +00:00
Rafael Espindola
5e85158321 Partial revert of 132882. 
Dan noted that this would work on the case shown on the commit message. I think
the case that was failing was a bb ending with a redundant conditional jump:

...
jne foo

foo:
...

I was unable to find any such case in the tests or in a debug build of clang,
so I will revert this part of the patch and watch the bots.

llvm-svn: 133004
 2011-06-14 18:12:31 +00:00
Rafael Espindola
844485af13 Implement Jakob's suggestion on how to detect fall thought without calling 
AnalyzeBranch.

llvm-svn: 132981
 2011-06-14 06:08:32 +00:00
Rafael Espindola
2f3c2fe7c5 Really fix the fall-through logic. 
Add a triple to the tests.

llvm-svn: 132885
 2011-06-12 05:57:01 +00:00
Rafael Espindola
653a07206d Fix silly bug I introduce in the previous commit. Fixes debug builds. 
llvm-svn: 132883
 2011-06-12 05:26:32 +00:00
Rafael Espindola
defd4b0875 AnalyzeBranch doesn't change which successors a bb has, just the order 
we try to branch to them.

Before we were creating successor lists with duplicated entries. Fixing that
found a bug in isBlockOnlyReachableByFallthrough that would causes it to
return the wrong answer for

-----------
...
jne foo
jmp bar

foo:
----------

llvm-svn: 132882
 2011-06-12 03:20:32 +00:00
Chad Rosier
b90a43d266 Ensure that EmitGlobalVariable is correctly differentiating between declarations 
and definitions when emitting global variables.  This was causing global 
declarations to be emitted as if they were definitions.
Fixes <rdar://problem/9429892>.

llvm-svn: 132825
 2011-06-10 00:53:15 +00:00
Charles Davis
5638b9f01e When generating code for Win64 EH, emit StartProc and EndProc directives. 
llvm-svn: 132250
 2011-05-28 04:21:04 +00:00
Rafael Espindola
836f7db2cc Fix the root cause of the bootstrap failure: 
There was no way to check if a given register/mode pair was valid. We now return
an error code (-2) instead of asserting. If anyone thinks that an assert
at this point  is really needed, we can autogen a hasValidDwarfRegNum instead.

llvm-svn: 132236
 2011-05-28 00:13:01 +00:00
Charles Davis
91ed799eb4 Stub out support for Win64-style exceptions. Note that this is merely using 
the Win64 EH mechanism to implement GCC-style exceptions. LLVM supports
hardly anything else at this point!

llvm-svn: 132234
 2011-05-27 23:47:32 +00:00
Rafael Espindola
b8e08be77d Fix a regression I recently introduced by removing DwarfRegNum of 
subregisters:

When a value is in a subregister, at least report the location as being
the superregister. We should extend the .td files to encode the bit
range so that we can produce a DW_OP_bit_piece.

llvm-svn: 132224
 2011-05-27 22:15:01 +00:00
Rafael Espindola
d23bfb8a7a Make size computation less brittle. 
llvm-svn: 132222
 2011-05-27 22:05:41 +00:00
Rafael Espindola
fc9bae6f8b Replace the -unwind-tables option with a per function flag. This is more 
LTO friendly as we can now correctly merge files compiled with or without
-fasynchronous-unwind-tables.

llvm-svn: 132033
 2011-05-25 03:44:17 +00:00
Rafael Espindola
19c1a56287 Produce a __debug_frame section on darwin ARM when appropriate. 
llvm-svn: 131151
 2011-05-10 21:04:45 +00:00
Rafael Espindola
fdc3e6fab6 Use .cfi_sections to put the unwind info in .debug_frame when possible. With 
this clang will use .debug_frame in, for example,
clang -g -c -m32 test.c
This matches gcc's behaviour. It looks like .debug_frame is a bit bigger
than .eh_frame, but has the big advantage of not being allocated.

llvm-svn: 131140
 2011-05-10 18:39:09 +00:00
Rafael Espindola
705d25a1f4 Nothing else uses this label. 
llvm-svn: 130989
 2011-05-06 15:44:29 +00:00
Rafael Espindola
a716096677 Dead code elimination. 
llvm-svn: 130984
 2011-05-06 14:56:22 +00:00
Rafael Espindola
ec0a3a0bbf Remove the DwarfTable enum. 
llvm-svn: 130959
 2011-05-05 22:14:31 +00:00
Rafael Espindola
59b6bfdbc6 Implement a really simple DwarfSjLjException. 
llvm-svn: 130947
 2011-05-05 20:48:31 +00:00
Rafael Espindola
240c96e2ca List all exception types in a switch. 
llvm-svn: 130944
 2011-05-05 19:48:34 +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
Rafael Espindola
b7a012a282 Factor some code to needsCFIMoves. Avoid printing moves when we don't have to. 
llvm-svn: 130501
 2011-04-29 14:14:06 +00:00
Devang Patel
3e021533cd Teach dwarf writer to handle complex address expression for .debug_loc entries. 
This fixes clang generated blocks' variables' debug info.
Radar 9279956.

llvm-svn: 130373
 2011-04-28 02:22:40 +00:00
Devang Patel
e3745fdcf3 Revert r130178. It turned out to be not the optimal path to emit complex location expressions. 
llvm-svn: 130326
 2011-04-27 20:29:27 +00:00
Rafael Espindola
a4fa5ce911 Print the label if we will use it in debug_frame. 
llvm-svn: 130232
 2011-04-26 19:26:53 +00:00
Chris Lattner
189ca1498f don't emit the symbol name twice for local bss and common 
symbols.  For example, don't emit:
        .comm   _i,4,2                  ## @i
                                        ## @i

instead emit:
        .comm   _i,4,2                  ## @i

llvm-svn: 130192
 2011-04-26 06:14:13 +00:00
Rafael Espindola
80cb3cb1d6 Print all the moves at a given label instead of just the first one. 
Remove previous DwarfCFI hack.

llvm-svn: 130187
 2011-04-26 03:58:56 +00:00
Devang Patel
cae2fbd6fc Let dwarf writer allocate extra space in the debug location expression. This space, if requested, will be used for complex addresses of the Blocks' variables. 
llvm-svn: 130178
 2011-04-26 00:12:46 +00:00
Devang Patel
2266aa84a1 Refactor. 
llvm-svn: 129938
 2011-04-21 21:07:35 +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
Rafael Espindola
beb74c3f00 Some refactoring suggested by Anton Korobeynikov. 
llvm-svn: 129600
 2011-04-15 20:32:03 +00:00
Rafael Espindola
a01cdb0e37 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
b5e3e9dd27 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
aa2a7cd828 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
7dd4d6e2e8 Print visibility info for external variables. 
llvm-svn: 128887
 2011-04-05 15:51:32 +00:00
Jim Grosbach
1900c73a97 Tidy up. 80 columns and trailing whitespace. 
llvm-svn: 128504
 2011-03-29 23:20:22 +00:00
Anton Korobeynikov
a7ec2dcefd Some first rudimentary support for ARM EHABI: print exception table in "text mode". 
llvm-svn: 127099
 2011-03-05 18:43:15 +00:00
Stuart Hastings
bf83659d11 Omit private_extern declarations of extern symbols; followup to 
r124468.  Patch by Rafael Avila de Espindola!

llvm-svn: 126297
 2011-02-23 02:27:05 +00:00
Duncan Sands
75b5d27b84 Spelling fix: consequtive -> consecutive. 
llvm-svn: 125563
 2011-02-15 09:23:02 +00:00
Jakob Stoklund Olesen
6d4d8581bc Assert on bad jump tables. 
llvm-svn: 125225
 2011-02-09 21:52:06 +00:00
Rafael Espindola
6c17d54891 Print the visibility of declarations. 
llvm-svn: 124468
 2011-01-28 03:20:10 +00:00
Anton Korobeynikov
9be547cfd3 Add a possibility to switch between CFI directives- and table-based frame description emission. Currently all the backends use table-based stuff. 
llvm-svn: 123476
 2011-01-14 21:58:08 +00:00
Anton Korobeynikov
61d167e92b Split stuff as a preparation for CFI directives-based frame information emission 
llvm-svn: 123473
 2011-01-14 21:57:45 +00:00
Chris Lattner
bf0aa927cc split dom frontier handling stuff out to its own DominanceFrontier header, 
so that Dominators.h is *just* domtree.  Also prune #includes a bit.

llvm-svn: 122714
 2011-01-02 22:09:33 +00:00
Chris Lattner
f8d180b808 remove the verbose-asm "constant pool double" comments that we were printing 
for each constant pool entry.  Using WriteTypeSymbolic here takes time
proportional to the size of the module, for each constant pool entry.

This speeds up -verbose-asm llc on 252.eon (a random testcase at my disposal)
from 4.4s to 2.137s.  llc takes 2.11s with asm-verbose off, so this is now a
pretty reasonable cost for verbose comments.

llvm-svn: 121691
 2010-12-13 07:35:47 +00:00
Chris Lattner
2a7f6fd9d4 refactor the interface to EmitInlineAsm a bit, no functionality change. 
llvm-svn: 119482
 2010-11-17 07:53:40 +00:00
Devang Patel
b5694e702c s/beginScope/beginInstruction/g 
s/endScope/endInstruction/g

llvm-svn: 117376
 2010-10-26 17:49:02 +00:00
Chris Lattner
9f06f911d1 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
Chris Lattner
419d0aa0ed add a comment about where this should eventually move. 
llvm-svn: 113117
 2010-09-05 20:33:40 +00:00
Devang Patel
854ad26ae2 There is no need to use .set here. 
Thanks Chris!

llvm-svn: 112900
 2010-09-02 23:01:10 +00:00