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95 Commits

Author SHA1 Message Date
Chris Lattner
ba7e756c22 Start inferring side effect information more aggressively, and fix many bugs in the 
x86 backend where instructions were not marked maystore/mayload, and perf issues where
instructions were not marked neverHasSideEffects.  It would be really nice if we could
write patterns for copy instructions.

I have audited all the x86 instructions down to MOVDQAmr.  The flags on others and on
other targets are probably not right in all cases, but no clients currently use this
info that are enabled by default.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45829 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-10 07:59:24 +00:00
Chris Lattner
214884ba03 if an instr lacks a pattern, assume it has side effects (unless never has s-e is true). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45823 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-10 05:40:54 +00:00
Chris Lattner
bc0b9f70ae start inferring 'no side effects'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45822 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-10 05:39:30 +00:00
Chris Lattner
8926038785 Infer mayload 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45819 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-10 04:44:48 +00:00
Chris Lattner
710e995889 realize that instructions who match intrinsics that read memory read memory. 
Also, instructions with any nodes that are SDNPMayLoad also read memory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45817 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-10 04:38:57 +00:00
Chris Lattner
dcc8b4f5d3 add a mayLoad property for machine instructions, a correlary to mayStore. 
This is currently not set by anything.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45748 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-08 18:05:21 +00:00
Chris Lattner
749c6f6b5e rename TargetInstrDescriptor -> TargetInstrDesc. 
Make MachineInstr::getDesc return a reference instead
of a pointer, since it can never be null.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45695 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-07 07:27:27 +00:00
Chris Lattner
0ff23966fe Rename all the M_* flags to be namespace qualified enums, and switch 
all clients over to using predicates instead of these flags directly.
These are now private values which are only to be used to statically
initialize the tables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45692 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-07 06:42:05 +00:00
Chris Lattner
8f707e15fb rename hasVariableOperands() -> isVariadic(). Add some comments. 
Evan, please review the comments I added to getNumDefs to make sure
that they are accurate, thx.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45687 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-07 05:19:29 +00:00
Chris Lattner
4764189298 Move M_* flags down in the file. Move SchedClass up in the 
TargetInstrDescriptor class and shrink to 16-bits, saving a 
word in TargetInstrDescriptor.  Add some comments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45686 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-07 05:06:49 +00:00
Chris Lattner
af3eb7c758 the name field of instructions is never set to a non-empty string, 
just unconditionally use the def name of the instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45684 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-07 04:57:31 +00:00
Chris Lattner
8ca5c67c6e Add predicates methods to TargetOperandInfo, and switch all clients 
over to using them, instead of diddling Flags directly.  Change the
various flags from const variables to enums.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45677 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-07 02:39:19 +00:00
Chris Lattner
834f1ce031 rename isLoad -> isSimpleLoad due to evan's desire to have such a predicate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45667 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 23:38:27 +00:00
Chris Lattner
2e48a70b35 rename isStore -> mayStore to more accurately reflect what it captures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45656 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 08:36:04 +00:00
Chris Lattner
c8478d8b12 Change the 'isStore' inferrer to look for 'SDNPMayStore' 
instead of "ISD::STORE".  This allows us to mark target-specific dag
nodes as storing (such as ppc byteswap stores).  This allows us to remove
more explicit isStore flags from the .td files.

Finally, add a warning for when a .td file contains an explicit 
isStore and tblgen is able to infer it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45654 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 06:44:58 +00:00
Chris Lattner
e67bde5bb1 set the 'isstore' flag for instructions whose pattern is an 
intrinsic that writes to memory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45650 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 05:36:50 +00:00
Chris Lattner
2d51a4ce8f remove some old hacky code that tried to infer whether a store 
occured in a pattern, but failed miserably.  The new code works for
any instruction that has a store in its pattern, including all the 
x86 mem op mem instructions.

The only target-independent code that uses this is branch folding,
so this won't change anything in practice.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45648 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 02:16:26 +00:00
Chris Lattner
a529a37fbd rearrange some code to allow inferring instr info from the pattern of the instr, but don't do so yet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45647 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 01:53:37 +00:00
Chris Lattner
5fbe275304 final cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45644 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 01:21:51 +00:00
Chris Lattner
ef8339b11a further simplifications and cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45643 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 01:20:13 +00:00
Chris Lattner
951740afb4 simplify some code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45642 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 01:12:44 +00:00
Chris Lattner
7b11712ef2 split enum emission out from InstrInfoEmitter into it's own tblgen backend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45640 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-01-06 00:49:05 +00:00
Chris Lattner
2c36affc82 tblgen shouldn't include headers from llvm codegen. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45429 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-30 00:25:23 +00:00
Chris Lattner
3060910e29 remove attributions from utils. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45419 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-29 20:37:13 +00:00
Bill Wendling
6b1da9c39f Add flags to indicate that there are "never" side effects or that there "may be" 
side effects for machine instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45022 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-14 01:48:59 +00:00
Evan Cheng
3dd298fb62 Oops. Forgot these. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44969 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-13 00:42:35 +00:00
Owen Anderson
20ab29068d Add a flag for indirect branch instructions. 
Target maintainers: please check that the instructions for your target are correctly marked.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44012 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-12 07:39:39 +00:00
Evan Cheng
b5910820ce Added TargetInstrDescriptor::numDefs - num of results. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40709 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 00:20:17 +00:00
Christopher Lamb
08d52071ba Add target independent MachineInstr's to represent subreg insert/extract in MBB's. PR1350 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40518 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-26 07:48:21 +00:00
Evan Cheng
88cc092ca5 Try committing again. Add OptionalDefOperand. Remove clobbersPred. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38498 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 18:05:01 +00:00
Evan Cheng
c419bd3396 ImmutablePredicateOperand is no more. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37963 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 23:23:38 +00:00
Evan Cheng
8012b077dd Instructions with ImmutablePredicateOperand aren't really predicable since their predicates are fixed at isel time. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37899 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-05 07:19:29 +00:00
Dan Gohman
d45eddd214 Revert the earlier change that removed the M_REMATERIALIZABLE machine 
instruction flag, and use the flag along with a virtual member function
hook for targets to override if there are instructions that are only
trivially rematerializable with specific operands (i.e. constant pool
loads).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37728 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-26 00:48:07 +00:00
Dan Gohman
82a87a0172 Replace M_REMATERIALIZIBLE and the newly-added isOtherReMaterializableLoad 
with a general target hook to identify rematerializable instructions. Some
instructions are only rematerializable with specific operands, such as loads
from constant pools, while others are always rematerializable. This hook
allows both to be identified as being rematerializable with the same
mechanism.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37644 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 01:48:05 +00:00
Evan Cheng
eaa91b0a1f Replace TargetInstrInfo::CanBeDuplicated() with a M_NOT_DUPLICABLE bit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37643 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 01:26:51 +00:00
Evan Cheng
b5c1c9c8e3 Add clobbersPred - instruction that clobbers condition code / register which are used to predicate instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37465 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 10:14:55 +00:00
Evan Cheng
5127ce09a4 Rename M_PREDICATED to M_PREDICABLE; opcode can be specified isPredicable without having a PredicateOperand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37116 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-16 20:45:24 +00:00
Evan Cheng
3ab6dcfc54 Mark all (not just the first) predicate operand M_PREDICATE_OPERAND. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37061 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-15 01:20:36 +00:00
Evan Cheng
04677a3b49 Recognize target instruction flag 'isReMaterializable'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35159 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 06:20:37 +00:00
Jim Laskey
a683f9ba13 Files missing from LABEL check in. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33539 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-26 17:29:20 +00:00
Bill Wendling
f5da13367f What should be the last unnecessary <iostream>s in the library. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32333 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-07 22:21:48 +00:00
Evan Cheng
fb1aab0673 Add opcode to TargetInstrDescriptor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31804 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-17 01:46:27 +00:00
Chris Lattner
0bb75004ff ADd support for adding constraints to suboperands 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31748 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-15 02:38:17 +00:00
Chris Lattner
f196839562 allow ptr_rc to explicitly appear in an instructions operand list, it doesn't 
have to be a subpart of a complex operand.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31618 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-10 02:01:40 +00:00
Evan Cheng
a1fd6504aa Remove M_2_ADDR_FLAG. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31583 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-09 02:22:54 +00:00
Chris Lattner
d9a7f4db5f Mark predicate operands as such in operand info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31483 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-06 23:53:31 +00:00
Chris Lattner
a0cca4ae26 simplify the way operand flags and constraints are handled, making it easier 
to extend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31481 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-06 23:49:51 +00:00
Chris Lattner
a818e92f8b recognize ppc's blr instruction as predicated 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31480 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-06 21:44:54 +00:00
Evan Cheng
c51737f46f Clean up some code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31451 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-04 09:40:23 +00:00
Evan Cheng
e2ba897588 Add operand constraints to TargetInstrInfo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31333 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-01 00:27:05 +00:00