Owen Anderson
9c207563a1
Throw the switch to allow FastISel to emit instructions whose return types different from their inputs. Next step: adding lowering pattens in FastISel that actually use these newly available opcodes.
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llvm-svn: 55349
2008-08-26 01:22:59 +00:00
Owen Anderson
7e677167d6
Enhance TableGen to emit code for FastISel of opcodes with variadic return types without slowing down opcodes that are not variadic. No such opcodes are currently generated, but in theory it should be a matter of just hitting the switch.
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llvm-svn: 55347
2008-08-26 00:42:26 +00:00
Owen Anderson
9264f41ef2
Add a RetVT parameter to emitted FastISel methods, so that we will be able to pass the desired return
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type down. This is not currently used.
llvm-svn: 55345
2008-08-25 23:58:18 +00:00
Owen Anderson
19b73e58e8
Deepen the map structure tablegen uses to compute FastISel patterns, in preparation for having patterns
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with return types that differ from their input types. This is not yet used.
llvm-svn: 55344
2008-08-25 23:43:09 +00:00
Owen Anderson
27491bbf2c
Add support for fast isel of (integer) immediate materialization pattens, and use them to support
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bitcast of constants in fast isel.
llvm-svn: 55325
2008-08-25 20:20:32 +00:00
Dan Gohman
46c93eebcd
Add a few comments.
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llvm-svn: 55157
2008-08-22 00:28:15 +00:00
Dan Gohman
a398d11527
Factor out the predicate check code from DAGISelEmitter.cpp
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and use it in FastISelEmitter.cpp, and make FastISel
subtarget aware. Among other things, this lets it work
properly on x86 targets that don't have SSE, where it
successfully selects x87 instructions.
llvm-svn: 55156
2008-08-22 00:20:26 +00:00
Dan Gohman
a6e647dd7c
Basic fast-isel support for instructions with constant int operands.
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llvm-svn: 55099
2008-08-21 01:41:07 +00:00
Dan Gohman
e628777073
Remove the code that limited FastISel to certain fixed signatures.
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llvm-svn: 55096
2008-08-21 00:35:26 +00:00
Dan Gohman
4ab3376173
Begin making more use of the FastISelEmitter class.
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llvm-svn: 55093
2008-08-21 00:19:05 +00:00
Dan Gohman
d79f723519
Remove an obsolete todo comment.
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llvm-svn: 55080
2008-08-20 21:47:28 +00:00
Dan Gohman
74bfad70e1
Factor the code for determining the target-specific instruction
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namespace out of the isel emitters and into common code.
llvm-svn: 55079
2008-08-20 21:45:57 +00:00
Dan Gohman
ddebe95287
Simplify FastISel's constructor argument list, make the FastISel
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class hold a MachineRegisterInfo member, and make the
MachineBasicBlock be passed in to SelectInstructions rather
than the FastISel constructor.
llvm-svn: 55076
2008-08-20 21:05:57 +00:00
Dan Gohman
ebba5dd8be
For now, restrict FastISel to instructions that only involve one
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register class.
llvm-svn: 55008
2008-08-19 20:58:14 +00:00
Dan Gohman
69eb9fb38e
Factor out the code to scan an instruction's operands into a
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helper function.
llvm-svn: 55007
2008-08-19 20:56:30 +00:00
Dan Gohman
85448ceb8d
Add more comments.
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llvm-svn: 55004
2008-08-19 20:36:33 +00:00
Dan Gohman
b60099089a
Fix indentation in FastISel tablegen-emitted code.
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llvm-svn: 55003
2008-08-19 20:31:38 +00:00
Dan Gohman
a8dfd17e4e
Add more checking to filter out more kinds of things that
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FastISel doesn't support yet.
llvm-svn: 55002
2008-08-19 20:30:54 +00:00
Dan Gohman
1701d4ef7e
80 columns.
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llvm-svn: 54998
2008-08-19 18:07:49 +00:00
Dan Gohman
3a57ef9668
Add a few doxygen comments.
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llvm-svn: 54997
2008-08-19 18:06:12 +00:00
Dan Gohman
4b1b033f89
Initial checkin of the new "fast" instruction selection support. See
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the comments in FastISelEmitter.cpp for details on what this is.
This is currently experimental and unusable.
llvm-svn: 54751
2008-08-13 20:19:35 +00:00
