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138 Commits

Author SHA1 Message Date
Evan Cheng
827f269fac Added getNumDefs(). 
llvm-svn: 41901
 2007-09-13 00:16:29 +00:00
Evan Cheng
8f126e59f5 Added TargetInstrDescriptor::numDefs - num of results. 
llvm-svn: 40709
 2007-08-02 00:20:17 +00:00
Christopher Lamb
9a0d88efde Add target independent MachineInstr's to represent subreg insert/extract in MBB's. PR1350 
llvm-svn: 40518
 2007-07-26 07:48:21 +00:00
Evan Cheng
6125079452 Add OptionalDefOperand. Remove clobbersPred. Also add DefinesPredicate to be used by if-converter. 
llvm-svn: 38499
 2007-07-10 18:06:29 +00:00
Dan Gohman
3f7558673e Fix a typo in a comment. 
llvm-svn: 38456
 2007-07-09 15:15:24 +00:00
Dan Gohman
9cbc3fb1ab 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).

llvm-svn: 37728
 2007-06-26 00:48:07 +00:00
Dan Gohman
b60d8a92c9 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.

llvm-svn: 37644
 2007-06-19 01:48:05 +00:00
Evan Cheng
4358a7f1e9 Replace CanBeDuplicated() with a M_NOT_DUPLICABLE bit. 
llvm-svn: 37642
 2007-06-19 01:21:41 +00:00
Evan Cheng
34a6cb0b2e Added CanBeDuplicated(). It returns true if an instruction can be safely duplicated (e.g. during ifcvt). 
llvm-svn: 37605
 2007-06-15 21:13:54 +00:00
Dale Johannesen
62f49dd524 Do not treat FP_REG_KILL as terminator in branch analysis (X86). 
llvm-svn: 37578
 2007-06-14 22:03:45 +00:00
Dan Gohman
35f2b4d716 Add a target hook to allow loads from constant pools to be rematerialized, and an 
implementation for x86.

llvm-svn: 37576
 2007-06-14 20:50:44 +00:00
Evan Cheng
1a6c0341fd Add a utility routine to check for unpredicated terminator instruction. 
llvm-svn: 37528
 2007-06-08 21:59:56 +00:00
Evan Cheng
4de6599e83 Add a machine instruction flag indicating the instruction can clobber condition code / register(s) used to predicate instructions. 
llvm-svn: 37464
 2007-06-06 10:13:55 +00:00
Evan Cheng
d8b25a2091 Add missing const qualifiers. 
llvm-svn: 37341
 2007-05-29 18:35:22 +00:00
Evan Cheng
f2d1d0124e Add a couple of target hooks for predication. 
llvm-svn: 37306
 2007-05-23 07:19:12 +00:00
Evan Cheng
7d3f771e9c Consistency. 
llvm-svn: 37274
 2007-05-22 01:21:58 +00:00
Evan Cheng
234aab208a RemoveBranch() and InsertBranch() now returns number of instructions deleted / inserted. 
llvm-svn: 37192
 2007-05-18 00:05:48 +00:00
Evan Cheng
dc9e574073 Remove. Not needed. 
llvm-svn: 37139
 2007-05-17 00:11:35 +00:00
Evan Cheng
3163b77d5e Add target hook to specify block size limit for if-conversion. 
llvm-svn: 37134
 2007-05-16 23:45:53 +00:00
Evan Cheng
973f4a19cb PredicateInstruction returns true if the operation was successful. 
llvm-svn: 37124
 2007-05-16 21:53:07 +00:00
Evan Cheng
3b10540b5e Rename M_PREDICATED to M_PREDICABLE; Move TargetInstrInfo::isPredicatable() to MachineInstr::isPredicable(). 
llvm-svn: 37115
 2007-05-16 20:43:42 +00:00
Evan Cheng
770584a8cd Fix comments. 
llvm-svn: 37096
 2007-05-16 05:09:34 +00:00
Evan Cheng
7fe6d7cb7e Add TargetInstrInfo predication hooks. 
llvm-svn: 37091
 2007-05-16 01:58:56 +00:00
Evan Cheng
71c4d42bd7 All operands that made up of the predicate operands are maked M_PREDICATE_OPERAND. 
llvm-svn: 37062
 2007-05-15 01:21:27 +00:00
Evan Cheng
2081cf96ed Add a TargetInstrDescriptor flag to mark an instruction as "re-materializable". 
It means the instruction can be easily re-materialized at any point. e.g.
constant generation, load from constantpool.

llvm-svn: 35158
 2007-03-19 06:19:16 +00:00
Evan Cheng
0408dc0d37 These forward declarations are not needed. 
llvm-svn: 35120
 2007-03-16 08:41:06 +00:00
Jeff Cohen
b19ec59b5c Fix for VS 2005 problem supplied by Morten Ofstad. 
llvm-svn: 35098
 2007-03-14 15:25:21 +00:00
Jim Laskey
23ed7d2625 Make LABEL a builtin opcode. 
llvm-svn: 33537
 2007-01-26 14:34:52 +00:00
Evan Cheng
e0aa279fc8 Silly assertion. Forgot variable_ops instructions can have arbitrary number of 
operands.

llvm-svn: 32592
 2006-12-15 06:37:08 +00:00
Evan Cheng
88a55bdd64 Move findTiedToSrcOperand to TargetInstrDescriptor. 
llvm-svn: 32366
 2006-12-08 18:45:48 +00:00
Evan Cheng
dfec38a575 Use MI's TargetInstrDescriptor. 
llvm-svn: 32352
 2006-12-08 07:57:56 +00:00
Evan Cheng
d042dac8ab - Add getOperandConstraint() to TargetInstrDescriptor. 
- convertToThreeAddress() change to allow single two-address MI to be converted
  into one or more 3-address MIs.

llvm-svn: 32094
 2006-12-01 21:46:55 +00:00
Evan Cheng
6f5962e79f Add opcode to TargetInstrDescriptor. 
llvm-svn: 31802
 2006-11-17 01:36:01 +00:00
Evan Cheng
8743c67826 Remove M_2_ADDR_FLAG. 
llvm-svn: 31583
 2006-11-09 02:22:54 +00:00
Chris Lattner
b6be2b873f Add a new operand flag to mark which operand is the first predicate operand 
of an M_PREDICATED instruction.

llvm-svn: 31482
 2006-11-06 23:53:08 +00:00
Chris Lattner
d7138e5f2d add a flag so that predicated instructions can be recognized by branch 
folding

llvm-svn: 31479
 2006-11-06 21:44:17 +00:00
Evan Cheng
1da5ee8485 Rename 
llvm-svn: 31364
 2006-11-01 23:18:32 +00:00
Evan Cheng
b1ac9f6c12 Added getTiedToSrcOperand() to check for two-address'ness. 
llvm-svn: 31360
 2006-11-01 23:00:31 +00:00
Evan Cheng
c566892bd5 Add operand constraints to TargetInstrInfo. 
llvm-svn: 31333
 2006-11-01 00:27:05 +00:00
Chris Lattner
dcfee77788 add another target hook for branch folding. 
llvm-svn: 31262
 2006-10-28 17:29:57 +00:00
Chris Lattner
bc4f0e8b56 update comment 
llvm-svn: 31165
 2006-10-24 17:41:22 +00:00
Rafael Espindola
b35e4b16ae fix assert comment 
llvm-svn: 31154
 2006-10-24 14:47:28 +00:00
Chris Lattner
7353b07275 expose DWARF_LABEL opcode# so the branch folder can update debug info properly. 
llvm-svn: 31024
 2006-10-17 22:41:45 +00:00
Chris Lattner
ea84388ac0 update comment 
llvm-svn: 31023
 2006-10-17 22:12:15 +00:00
Chris Lattner
b441d8e8ce it is easier to implement these when they are virtual 
llvm-svn: 30944
 2006-10-13 21:02:27 +00:00
Chris Lattner
520bf168f5 allow branch reversal to fail 
llvm-svn: 30943
 2006-10-13 20:59:31 +00:00
Chris Lattner
f8eaaded24 replace the existing branch inspection/modification APIs with something more 
useful and general.

llvm-svn: 30940
 2006-10-13 20:44:01 +00:00
Jim Laskey
a67adda697 Use an enumeration to eliminate data relocations. 
llvm-svn: 29249
 2006-07-21 20:57:35 +00:00
Evan Cheng
6909286861 Clean up 
llvm-svn: 28851
 2006-06-17 01:42:20 +00:00
Evan Cheng
276a39d956 Avoid undesirable behavior when assert is not enabled. 
llvm-svn: 28793
 2006-06-15 08:10:27 +00:00