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56 Commits

Author SHA1 Message Date
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
Owen Anderson 37ef826040 Enhance the fixed length disassembler to better handle operand decoding failures. 
llvm-svn: 136635
 2011-08-01 18:44:37 +00:00
Owen Anderson e08f5b5b37 Correctly handle scattered operands where the bits of the operand are contiguous, but out of order. 
llvm-svn: 136534
 2011-07-29 23:01:18 +00:00
David Greene af8ee2cdee Unconstify Inits 
Remove const qualifiers from Init references, per Chris' request.

llvm-svn: 136531
 2011-07-29 22:43:06 +00:00
David Greene 1aa0e3e118 [AVX] Constify Inits 
Make references to Inits const everywhere.  This is the final step
before making them unique.

llvm-svn: 136485
 2011-07-29 19:07:05 +00:00
Owen Anderson cb32ce2642 Third time's the charm for implementing tied operand decoding properly. 
llvm-svn: 136478
 2011-07-29 18:28:52 +00:00
Owen Anderson abe75904a8 Fix a case where, when trying to track tied operands, we'd accidentally overwrite our mapping. 
llvm-svn: 136467
 2011-07-29 17:32:03 +00:00
Owen Anderson 53562d0551 Enhance the fixed-length decoder emitter to support tied operands. 
llvm-svn: 136431
 2011-07-28 23:56:20 +00:00
Owen Anderson e3591657a0 Enhance the fixed-length decoder emitter to support parsing scattered fields. 
llvm-svn: 136405
 2011-07-28 21:54:31 +00:00
Owen Anderson c78e03c39a Enhance the FixedLengthDecoder to be able to generate plausible-looking decoders for ARM. 
llvm-svn: 135524
 2011-07-19 21:06:00 +00:00
Eric Christopher 71520a867d Revert r134921, 134917, 134908 and 134907. They're causing failures 
in multiple buildbots.

llvm-svn: 134936
 2011-07-11 23:06:52 +00:00
David Greene af973b4f36 [AVX] Make Inits Foldable 
Manage Inits in a FoldingSet.  This provides several benefits:

- Memory for Inits is properly managed

- Duplicate Inits are folded into Flyweights, saving memory

- It enforces const-correctness, protecting against certain classes
  of bugs

The above benefits allow Inits to be used in more contexts, which in
turn provides more dynamism to TableGen.  This enhanced capability
will be used by the AVX code generator to a fold common patterns
together.

llvm-svn: 134907
 2011-07-11 18:25:51 +00:00