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llvm-mirror/utils/TableGen
Hal Finkel 593fc5537a Add an OutPatFrag TableGen class
Unfortunately, it is currently impossible to use a PatFrag as part of an output
pattern (the part of the pattern that has instructions in it) in TableGen.
Looking at the current implementation, this was clearly intended to work (there
is already code in place to expand patterns in the output DAG), but is
currently broken by the baked-in type-checking assumption and the order in which
the pattern fragments are processed (output pattern fragments need to be
processed after the instruction definitions are processed).

Fixing this is fairly simple, but requires some way of differentiating output
patterns from the existing input patterns. The simplest way to handle this
seems to be to create a subclass of PatFrag, and so that's what I've done here.

As a simple example, this allows us to write:

def crnot : OutPatFrag<(ops node:$in),
                       (CRNOR $in, $in)>;

def       : Pat<(not i1:$in),
                (crnot $in)>;

which captures the core use case: handling of repeated subexpressions inside
of complicated output patterns.

This will be used by an upcoming commit to the PowerPC backend.

llvm-svn: 202450
2014-02-28 00:26:56 +00:00
..
AsmMatcherEmitter.cpp
AsmWriterEmitter.cpp
AsmWriterInst.cpp
AsmWriterInst.h
CallingConvEmitter.cpp
CMakeLists.txt
CodeEmitterGen.cpp
CodeGenDAGPatterns.cpp Add an OutPatFrag TableGen class 2014-02-28 00:26:56 +00:00
CodeGenDAGPatterns.h Add an OutPatFrag TableGen class 2014-02-28 00:26:56 +00:00
CodeGenInstruction.cpp
CodeGenInstruction.h
CodeGenIntrinsics.h
CodeGenMapTable.cpp
CodeGenRegisters.cpp
CodeGenRegisters.h
CodeGenSchedule.cpp
CodeGenSchedule.h
CodeGenTarget.cpp
CodeGenTarget.h
CTagsEmitter.cpp Remove unnecessary include. 2014-02-09 07:55:19 +00:00
DAGISelEmitter.cpp
DAGISelMatcher.cpp
DAGISelMatcher.h
DAGISelMatcherEmitter.cpp
DAGISelMatcherGen.cpp
DAGISelMatcherOpt.cpp
DFAPacketizerEmitter.cpp
DisassemblerEmitter.cpp
FastISelEmitter.cpp Rename a DebugLoc variable to DbgLoc and a DataLayout to DL. 2014-02-18 22:05:46 +00:00
FixedLenDecoderEmitter.cpp Remove unnecessary include. 2014-02-09 07:55:19 +00:00
InstrInfoEmitter.cpp
IntrinsicEmitter.cpp Stackmaps are used for OSR exits, which is a custom kind of unwinding. Hence, they 2014-02-20 23:57:31 +00:00
LLVMBuild.txt
Makefile
OptParserEmitter.cpp
PseudoLoweringEmitter.cpp
RegisterInfoEmitter.cpp Fix indentation. 2014-02-27 03:30:36 +00:00
SequenceToOffsetTable.h
SetTheory.cpp
SetTheory.h
SubtargetEmitter.cpp
TableGen.cpp
TableGenBackends.h
tdtags
X86DisassemblerShared.h Remove filtering concept from X86 disassembler table generation. It's no longer necessary. 2014-02-13 07:07:16 +00:00
X86DisassemblerTables.cpp Remove A6/A7 opcode maps. They can all be handled with a TB map, opcode of 0xa6/0xa7, and adding MRM_C0/MRM_E0 forms. Removes 376K from the disassembler tables. 2014-02-19 05:34:21 +00:00
X86DisassemblerTables.h Remove A6/A7 opcode maps. They can all be handled with a TB map, opcode of 0xa6/0xa7, and adding MRM_C0/MRM_E0 forms. Removes 376K from the disassembler tables. 2014-02-19 05:34:21 +00:00
X86ModRMFilters.cpp
X86ModRMFilters.h
X86RecognizableInstr.cpp [x86] Simplify disassembler code slightly. 2014-02-26 06:01:21 +00:00
X86RecognizableInstr.h [x86] Switch PAUSE instruction to use XS prefix instead of HasREPPrefix. Remove HasREPPrefix support from disassembler table generator since its now only used by CodeGenOnly instructions. 2014-02-20 07:59:43 +00:00