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42 Commits

Author SHA1 Message Date
Craig Topper ebc3aa250b Fix up indentation of outputted decode function for readability. 
llvm-svn: 162082
 2012-08-17 05:16:15 +00:00
Benjamin Kramer 26b568d9d5 Fix a const violation in the generated disassembler. 
llvm-svn: 161940
 2012-08-15 10:26:44 +00:00
Jim Grosbach ecaef49f59 Switch the fixed-length disassembler to be table-driven. 
Refactor the TableGen'erated fixed length disassemblmer to use a
table-driven state machine rather than a massive set of nested
switch() statements.

As a result, the ARM Disassembler (ARMDisassembler.cpp) builds much more
quickly and generates a smaller end result. For a Release+Asserts build on
a 16GB 3.4GHz i7 iMac w/ SSD:

Time to compile at -O2 (averaged w/ hot caches):
  Previous: 35.5s
  New:       8.9s

TEXT size:
  Previous: 447,251
  New:      297,661

Builds in 25% of the time previously required and generates code 66% of
the size.

Execution time of the disassembler is only slightly slower (7% disassembling
10 million ARM instructions, 19.6s vs 21.0s). The new implementation has
not yet been tuned, however, so the performance should almost certainly
be recoverable should it become a concern.

llvm-svn: 161888
 2012-08-14 19:06:05 +00:00
Jakob Stoklund Olesen e6aed139f0 Write llvm-tblgen backends as functions instead of sub-classes. 
The TableGenBackend base class doesn't do much, and will be removed
completely soon.

Patch by Sean Silva!

llvm-svn: 158311
 2012-06-11 15:37:55 +00:00
Silviu Baranga 98144e9e1a Second part for the 153874 one 
llvm-svn: 153875
 2012-04-02 15:46:46 +00:00
Craig Topper 501d95c176 More const-correcting of FixedLenDecoderEmitter. 
llvm-svn: 152906
 2012-03-16 06:52:56 +00:00
Craig Topper 48c112babe Const-correct the FixedLenDecoderEmitter. Pass a few things by const reference instead of value to avoid some copying. 
llvm-svn: 152899
 2012-03-16 05:58:09 +00:00
Craig Topper 82d0d5fc6b Spacing fixes. Mostly aligning arguments that spilled onto next line with the opening parenthese instead of 2 spaces in. 
llvm-svn: 152889
 2012-03-16 01:19:24 +00:00
Craig Topper 93e6434ca9 Remove unused field NumVariable from Filter class. Even it was needed the same result could be found with VariableInstructions.size(). Also fix some typos in comments. 
llvm-svn: 152885
 2012-03-16 00:56:01 +00:00
Craig Topper ba6d810752 Remove unused field from FixedLenDecoderEmitter. Move NumberedInstructions declaration from class to run method since its only used there and was being reinitialized anyway. 
llvm-svn: 152616
 2012-03-13 06:39:00 +00:00
Jim Grosbach 3f4b23933f Tidy up. 80 columns. 
llvm-svn: 151764
 2012-02-29 22:07:56 +00:00
James Molloy d9ba4fd48f Teach the MC and disassembler about SoftFail, and hook it up to UNPREDICTABLE on ARM. Wire this to tBLX in order to provide test coverage. 
llvm-svn: 150169
 2012-02-09 10:56:31 +00:00
Craig Topper c4965bce14 Convert assert(0) to llvm_unreachable 
llvm-svn: 149814
 2012-02-05 07:21:30 +00:00
Owen Anderson b7d9ee707d Fix unused variable warning in the rare circumstance that we have no feature-dependent instructions. 
llvm-svn: 142193
 2011-10-17 16:56:47 +00:00
Peter Collingbourne 84c287e33c Move TableGen's parser and entry point into a library 
This is the first step towards splitting LLVM and Clang's tblgen executables.

llvm-svn: 140951
 2011-10-01 16:41:13 +00:00
Bob Wilson ce29158bc4 Subtarget getFeatureBits() returns a uint64_t, not unsigned. 
llvm-svn: 140928
 2011-10-01 02:47:54 +00:00
Eli Friedman e776b580c1 Make sure to handle the case where emitPredicateMatch returns false. Noticed by inspection. 
llvm-svn: 139317
 2011-09-08 21:00:31 +00:00
James Molloy 21d293a37f Fix warning on windows; use of comparison with bool argument. 
llvm-svn: 139286
 2011-09-08 08:12:01 +00:00
Andrew Trick 43674ad44d Fix a use of freed string contents. 
Speculatively try to fix our windows testers with a patch I found on the internet.

llvm-svn: 139279
 2011-09-08 05:25:49 +00:00
Andrew Trick 61abca6daa whitespace 
llvm-svn: 139278
 2011-09-08 05:23:14 +00:00
James Molloy 8067df9503 Second of a three-patch series aiming to fix MSR/MRS on Cortex-M. This adds predicate checking to the Disassembler. 
llvm-svn: 139250
 2011-09-07 19:42:28 +00:00
Owen Anderson a4043c4b32 Allow the MCDisassembler to return a "soft fail" status code, indicating an instruction that is disassemblable, but invalid. Only used for ARM UNPREDICTABLE instructions at the moment. 
Patch by James Molloy.

llvm-svn: 137830
 2011-08-17 17:44:15 +00:00
Owen Anderson ecc4ffc941 Fix an oversight in the FixedLenDecoderEmitter where we weren't correctly checking the success result of custom decoder hooks on singleton decodings. 
llvm-svn: 137171
 2011-08-09 23:05:23 +00:00
Owen Anderson 3022d6711d Make the FixedLengthDecoderEmitter smart enough to autogenerate decoders for encodings like "let Inst{11-7} = foo;", where the RHS has no bitwidth specifiers. 
llvm-svn: 136660
 2011-08-01 22:45:43 +00:00
Owen Anderson faee2cf9ff The FixedLenDecoder needs to gracefully handle failing per-instruction decoder hooks in addition to per-operand decoder hooks. 
llvm-svn: 136645
 2011-08-01 20:06:49 +00:00