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llvm-project/llvm/utils/TableGen
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Simon Tatham 6a8c6cadf1 [TableGen] Add a general-purpose JSON backend. 
The aim of this backend is to output everything TableGen knows about
the record set, similarly to the default -print-records backend. But
where -print-records produces output in TableGen's input syntax
(convenient for humans to read), this backend produces it as
structured JSON data, which is convenient for loading into standard
scripting languages such as Python, in order to extract information
from the data set in an automated way.

The output data contains a JSON representation of the variable
definitions in output 'def' records, and a few pieces of metadata such
as which of those definitions are tagged with the 'field' prefix and
which defs are derived from which classes. It doesn't dump out
absolutely every piece of knowledge it _could_ produce, such as type
information and complicated arithmetic operator nodes in abstract
superclasses; the main aim is to allow consumers of this JSON dump to
essentially act as new backends, and backends don't generally need to
depend on that kind of data.

The new backend is implemented as an EmitJSON() function similar to
all of llvm-tblgen's other EmitFoo functions, except that it lives in
lib/TableGen instead of utils/TableGen on the basis that I'm expecting
to add it to clang-tblgen too in a future patch.

To test it, I've written a Python script that loads the JSON output
and tests properties of it based on comments in the .td source - more
or less like FileCheck, except that the CHECK: lines have Python
expressions after them instead of textual pattern matches.

Reviewers: nhaehnle

Reviewed By: nhaehnle

Subscribers: arichardson, labath, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D46054

llvm-svn: 336771
 		2018-07-11 08:40:19 +00:00
..
AsmMatcherEmitter.cpp [TableGen] Make TiedAsmOperandTable in the AsmMatcher 'static' since its at file scope. 2018-06-18 16:17:46 +00:00
AsmWriterEmitter.cpp [TableGen] Prevent double flattening of InstAlias asm strings in the asm matcher emitter. 2018-06-18 01:28:01 +00:00
AsmWriterInst.cpp
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AsmWriterInst.h
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Attributes.cpp Remove redundant includes from utils/TableGen. 2017-12-13 21:31:13 +00:00
CMakeLists.txt [RFC][Patch 1/3] Add a new class of predicates for variant scheduling classes. 2018-05-25 15:55:37 +00:00
CTagsEmitter.cpp [TableGen] Change std::sort to llvm::sort in response to r327219 2018-04-06 20:18:05 +00:00
CallingConvEmitter.cpp [TableGen] Simplify CallingConvEmitter.cpp. NFC. 2017-10-16 14:52:26 +00:00
CodeEmitterGen.cpp [tablegen] Avoid creating a temporary vector in getInstructionCase 2017-07-04 06:16:53 +00:00
CodeGenDAGPatterns.cpp [globalisel][tablegen] Add support for C++ predicates on PatFrags and use it to support BFC on ARM. 2018-06-15 23:13:43 +00:00
CodeGenDAGPatterns.h [globalisel][tablegen] Add support for C++ predicates on PatFrags and use it to support BFC on ARM. 2018-06-15 23:13:43 +00:00
CodeGenHwModes.cpp TableGen support for parameterized register class information 2017-09-14 16:56:21 +00:00
CodeGenHwModes.h TableGen support for parameterized register class information 2017-09-14 16:56:21 +00:00
CodeGenInstruction.cpp [TableGen][AsmMatcherEmitter] Allow tied operands of different classes in aliases. 2018-06-18 13:39:29 +00:00
CodeGenInstruction.h [TableGen] Prevent double flattening of InstAlias asm strings in the asm matcher emitter. 2018-06-18 01:28:01 +00:00
CodeGenIntrinsics.h Fix layering of MachineValueType.h by moving it from CodeGen to Support 2018-03-23 23:58:25 +00:00
CodeGenMapTable.cpp [mips] Improve diagnostics for instruction mapping 2018-01-08 16:25:40 +00:00
CodeGenRegisters.cpp [X86] Add phony registers for high halves of regs with low halves 2018-07-02 19:05:09 +00:00
CodeGenRegisters.h [TableGen] Fix leaking synthesized registers. 2018-05-29 16:55:06 +00:00
CodeGenSchedule.cpp [GlobalISel][Tablegen] Assign small opcodes to pseudos 2018-05-23 22:10:21 +00:00
CodeGenSchedule.h [Tablegen] Simplify code in CodeGenSchedule. NFCI 2018-04-26 12:56:26 +00:00
CodeGenTarget.cpp [GlobalISel][Tablegen] Assign small opcodes to pseudos 2018-05-23 22:10:21 +00:00
CodeGenTarget.h [GlobalISel][Tablegen] Assign small opcodes to pseudos 2018-05-23 22:10:21 +00:00
DAGISelEmitter.cpp Revert r334764, as it breaks some bots 2018-06-14 20:32:58 +00:00
DAGISelMatcher.cpp Remove redundant includes from utils/TableGen. 2017-12-13 21:31:13 +00:00
DAGISelMatcher.h Fix layering of MachineValueType.h by moving it from CodeGen to Support 2018-03-23 23:58:25 +00:00
DAGISelMatcherEmitter.cpp [SelectionDAG] Add a isel matcher op to check the type of node results other than result 0. 2017-11-22 07:11:01 +00:00
DAGISelMatcherGen.cpp [TableGen] Fix some bad formatting. NFC 2018-07-11 01:01:55 +00:00
DAGISelMatcherOpt.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
DFAPacketizerEmitter.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
DisassemblerEmitter.cpp [WebAssembly] Initial Disassembler. 2018-05-10 22:16:44 +00:00
FastISelEmitter.cpp Revert r334764, as it breaks some bots 2018-06-14 20:32:58 +00:00
FixedLenDecoderEmitter.cpp [TableGen] Increase the number of supported decoder fix-ups. 2018-07-05 10:39:15 +00:00
GlobalISelEmitter.cpp [NFC] Prefer (void) to LLVM_ATTRIBUTE_UNUSED for unused var in GlobalISElemitter.cpp. 2018-06-26 07:05:08 +00:00
InfoByHwMode.cpp [TableGen] Change std::sort to llvm::sort in response to r327219 2018-04-06 20:18:05 +00:00
InfoByHwMode.h Fix layering of MachineValueType.h by moving it from CodeGen to Support 2018-03-23 23:58:25 +00:00
InstrDocsEmitter.cpp [Docs] Add tablegen backend for target opcode documentation 2017-11-14 15:35:15 +00:00
InstrInfoEmitter.cpp [RFC][Patch 2/3] Add a MCSubtargetInfo hook to resolve variant scheduling classes. 2018-05-25 16:02:43 +00:00
IntrinsicEmitter.cpp [Power9] Add __float128 builtins for Round To Odd 2018-07-09 18:50:06 +00:00
LLVMBuild.txt Add missing dependency (headers are included from MC, so a link dependency could exist easily enough) 2018-03-29 00:29:43 +00:00
OptParserEmitter.cpp [Bash-autocompletion] Add support for -std= 2017-08-29 02:01:56 +00:00
PredicateExpander.cpp [RFC][Patch 1/3] Add a new class of predicates for variant scheduling classes. 2018-05-25 15:55:37 +00:00
PredicateExpander.h [RFC][Patch 1/3] Add a new class of predicates for variant scheduling classes. 2018-05-25 15:55:37 +00:00
PseudoLoweringEmitter.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
RISCVCompressInstEmitter.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
RegisterBankEmitter.cpp Rename DEBUG macro to LLVM_DEBUG. 2018-05-14 12:53:11 +00:00
RegisterInfoEmitter.cpp [TableGen] Change std::sort to llvm::sort in response to r327219 2018-04-06 20:18:05 +00:00
SDNodeProperties.cpp TableGen: Allow setting SDNodeProperties on intrinsics 2017-12-20 19:36:28 +00:00
SDNodeProperties.h TableGen: Allow setting SDNodeProperties on intrinsics 2017-12-20 19:36:28 +00:00
SearchableTableEmitter.cpp TableGen/SearchableTables: Support more generic enums and tables 2018-06-21 13:36:22 +00:00
SequenceToOffsetTable.h Remove usages of deprecated std::unary_function and std::binary_function. 2017-09-14 18:33:25 +00:00
SubtargetEmitter.cpp [TableGen] Emit a fatal error on inconsistencies in resource units vs cycles. 2018-06-13 09:41:49 +00:00
SubtargetFeatureInfo.cpp IWYU for llvm-config.h in llvm, additions. 2018-04-30 14:59:11 +00:00
SubtargetFeatureInfo.h Remove \brief commands from doxygen comments. 2018-05-01 15:54:18 +00:00
TableGen.cpp [TableGen] Add a general-purpose JSON backend. 2018-07-11 08:40:19 +00:00
TableGenBackends.h [IR] Split Intrinsics.inc into enums and implementations 2018-06-23 02:02:38 +00:00
Types.cpp [globalisel][tablegen] Import SelectionDAG's rule predicates and support the equivalent in GIRule. 2017-04-21 15:59:56 +00:00
Types.h
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WebAssemblyDisassemblerEmitter.cpp [WebAssembly] Initial Disassembler. 2018-05-10 22:16:44 +00:00
WebAssemblyDisassemblerEmitter.h [WebAssembly] Initial Disassembler. 2018-05-10 22:16:44 +00:00
X86DisassemblerShared.h [X86] Use unique_ptr to simplify memory management. NFC 2018-03-24 07:15:47 +00:00
X86DisassemblerTables.cpp [X86] Remove DATA32_PREFIX. Hack the printing for DATA16_PREFIX to print 'data32' in 16-bit mode. Hack the asm parser to convert 'data32' to 'data16' in 16-bit mode. 2018-04-22 00:52:02 +00:00
X86DisassemblerTables.h [X86] Add a new disassembler opcode map for 3DNow. Stop treating 3DNow as an attribute. 2018-03-24 07:48:54 +00:00
X86EVEX2VEXTablesEmitter.cpp [X86] Add the ability to force an EVEX2VEX mapping table entry from the .td files. Remove remaining manual table entries from the tablegen emitter. 2018-06-19 04:24:44 +00:00
X86FoldTablesEmitter.cpp [X86] More additions to the load folding tables based on the autogenerated tables. 2018-06-16 23:25:50 +00:00
X86ModRMFilters.cpp
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X86ModRMFilters.h fix trivial typos in comments; NFC 2017-07-04 13:09:29 +00:00
X86RecognizableInstr.cpp [X86] Add a new VEX_WPrefix encoding to tag EVEX instruction that have VEX.W==1, but can be converted to their VEX equivalent that uses VEX.W==0. 2018-06-19 04:24:42 +00:00
X86RecognizableInstr.h [X86] Add a new VEX_WPrefix encoding to tag EVEX instruction that have VEX.W==1, but can be converted to their VEX equivalent that uses VEX.W==0. 2018-06-19 04:24:42 +00:00
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