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587 Commits

Author SHA1 Message Date
Chris Lattner 7982de167f eliminate need for the NumMIOperands field in Operand. 
llvm-svn: 31432
 2006-11-03 23:45:17 +00:00
Reid Spencer 03c6038226 Remove an unused variable. 
llvm-svn: 31403
 2006-11-03 01:48:30 +00:00
Reid Spencer 5314f04de5 Don't write out variables that are never used. 
llvm-svn: 31396
 2006-11-03 01:28:12 +00:00
Chris Lattner 71f55131d4 silence warnings 
llvm-svn: 31392
 2006-11-03 01:11:05 +00:00
Reid Spencer 6152ad000c Revert last patch which causes tblgen to segfault (why, I'm not sure). 
llvm-svn: 31383
 2006-11-02 21:07:40 +00:00
Reid Spencer 2a82686563 For PR786: 
Remove unused variables.

llvm-svn: 31381
 2006-11-02 20:46:16 +00:00
Evan Cheng 3557a39494 Tied-to constraint must be op_with_larger_idx = op_with_smaller_idx or else throw an exception. 
llvm-svn: 31361
 2006-11-01 23:03:11 +00:00
Evan Cheng 23654935f4 Not meant to be checked in. 
llvm-svn: 31334
 2006-11-01 00:27:59 +00:00
Evan Cheng ac79c7c4c0 Add operand constraints to TargetInstrInfo. 
llvm-svn: 31333
 2006-11-01 00:27:05 +00:00
Evan Cheng a74965f15a Passing isel root and use operands to ComplexPattern functions, these should do the usual load folding checks as well. 
llvm-svn: 30972
 2006-10-16 06:33:44 +00:00
Evan Cheng cfb9526d61 When checking if a load can be folded, we check if there is any non-direct 
way to reach the load via any nodes that would be folded. Start from the
root of the matched sub-tree.

llvm-svn: 30956
 2006-10-14 08:30:15 +00:00
Evan Cheng 1d04dd3aac Really remove dead nodes from isel queue. 
llvm-svn: 30923
 2006-10-12 23:18:52 +00:00
Evan Cheng 8e770f5589 Use RemoveDeadNode to kill dead node. 
llvm-svn: 30917
 2006-10-12 20:35:19 +00:00
Evan Cheng d7125583f7 Prior load folding check on chain operand was too strict. It requires the 
chain operand to point to the load being folded. Now we relax this, traversing
up the chain, if it doesn't reach the load, then it's ok. We will create a
TokenFactor (of all the chain operands and the load's chain) to capture all
the control flow dependencies.

llvm-svn: 30897
 2006-10-12 02:08:53 +00:00
Evan Cheng 2022c79d7f Added properties such as SDNPHasChain to ComplexPattern. 
llvm-svn: 30890
 2006-10-11 21:02:01 +00:00
Chris Lattner c52dab5894 regenerate 
llvm-svn: 30888
 2006-10-11 18:13:09 +00:00
Chris Lattner 9d9de698b5 Add support for let expressions around an mdef. This implements a new part 
of Regression/TableGen/MultiClass.td.

llvm-svn: 30887
 2006-10-11 18:12:44 +00:00
Chris Lattner f405928e86 Special case tblgen generated code for patterns like (and X, 255) or (or X, 42). 
The dag/inst combiners often 'simplify' the masked value based on whether
or not the bits are live or known zero/one.  This is good and dandy, but
often causes special case patterns to fail, such as alpha's CMPBGE pattern,
which looks like "(set GPRC:$RC, (setuge (and GPRC:$RA, 255), (and GPRC:$RB, 255)))".
Here the pattern for (and X, 255) should match actual dags like (and X, 254) if
the dag combiner proved that the missing bits are already zero (one for 'or').

For CodeGen/Alpha/cmpbge.ll:test2 for example, this results in:

        sll $16,1,$0
        cmpbge $0,$17,$0
        ret $31,($26),1

instead of:

        sll $16,1,$0
        and $0,254,$0
        and $17,255,$1
        cmpule $1,$0,$0
        ret $31,($26),1

... and requires no target-specific code.

llvm-svn: 30871
 2006-10-11 04:05:55 +00:00
Chris Lattner 66fbbca1e7 Split some code out into a new method. The generated code is exactly 
identical, this is just a refactoring.

llvm-svn: 30868
 2006-10-11 03:35:34 +00:00
Evan Cheng 75a1b70da8 Predicate function on the node should be matched before its childrean' matching 
code. This is especially important now matching ISD::LOAD also requires a
Predicate_Load call.

llvm-svn: 30845
 2006-10-09 21:02:17 +00:00
Chris Lattner 560804cc50 regenerate 
llvm-svn: 30799
 2006-10-07 07:15:19 +00:00
Chris Lattner dfbda3598d Bugfix: this allows multiclasses to have default arguments. 
llvm-svn: 30798
 2006-10-07 07:14:48 +00:00
Chris Lattner 8111c59279 Fix more static dtor issues 
llvm-svn: 30725
 2006-10-04 21:52:35 +00:00
Chris Lattner 5d751b4a3a This: 
AggregateString += "\0\0";

Doesn't add two nuls to the AggregateString (for obvious reasons), which
broke the asmprinter when the first character of an asm string was not
literal text.

llvm-svn: 30625
 2006-09-27 16:44:09 +00:00
Chris Lattner 8d21485660 Actually, name the method PrintSpecial to match other stuff in AsmPrinter.h 
llvm-svn: 30618
 2006-09-26 23:47:10 +00:00
Chris Lattner 5fd0154523 Add support for ${:foo} syntax, where "foo" is passed into "printSpecial" and 
has no associated operand.  This is useful for portably encoding stuff like
the comment character into an asm string.

llvm-svn: 30617
 2006-09-26 23:45:08 +00:00
Chris Lattner 7d3fd4f888 don't allow 'imm' or specific imms, like '1' on the LHS of a binop. 
This shrinks X86GenDAGISel by ~330 lines.

llvm-svn: 30574
 2006-09-21 20:46:13 +00:00
Chris Lattner 99ae714459 Fit to 80 columns. 
llvm-svn: 30572
 2006-09-21 18:28:27 +00:00
Evan Cheng 9de003670f Allow PatFrag to be a leaf node. 
llvm-svn: 30498
 2006-09-19 19:08:04 +00:00
Evan Cheng 00b2848adb Add result of a Xform to isel queue. 
llvm-svn: 30497
 2006-09-19 18:40:15 +00:00
Chris Lattner bea5f91946 If multiple predicates are listed, they must all pass 
llvm-svn: 30476
 2006-09-19 00:41:36 +00:00
Chris Lattner bba17b9913 There! 
llvm-svn: 30473
 2006-09-18 22:41:07 +00:00
Chris Lattner 82a73a1989 Fix Regression/TableGen/2006-09-18-LargeInt.td 
llvm-svn: 30472
 2006-09-18 22:28:27 +00:00
Chris Lattner 3ffda067e3 Relax this check. 
llvm-svn: 30381
 2006-09-14 23:54:24 +00:00
Evan Cheng 1ec61ba00a 1) With X86 lowering change, the following can no longer happen since 
the branch's chain is also produced by cmp.
          [ch, r : ld]
             ^ ^
             | |
      [XX]--/   \- [flag : cmp]
       ^             ^
       |             |
       \---[br flag]-

Remove an isel check which prevents loads from being folded into cmp / test
instructions.

2) Whenever possible, delete a selected node to allow more load folding
opportunities. Note not all nodes can be deleted after it has been
selected. Some may have simply morphed; some have not changed at all (e.g.
EntryToken).

llvm-svn: 30242
 2006-09-11 02:24:43 +00:00
Evan Cheng 5a798b0648 Generated isel should favors explicit constant operand (+2) over an operand with a predicate (+1). 
llvm-svn: 30180
 2006-09-08 07:26:39 +00:00
Chris Lattner a2d7d1c4fa Fix JIT encoding of two-addr instructions. 
llvm-svn: 30111
 2006-09-05 03:01:52 +00:00
Chris Lattner 13a5dcddce Fix a long-standing wart in the code generator: two-address instruction lowering 
actually *removes* one of the operands, instead of just assigning both operands
the same register.  This make reasoning about instructions unnecessarily complex,
because you need to know if you are before or after register allocation to match
up operand #'s with the target description file.

Changing this also gets rid of a bunch of hacky code in various places.

This patch also includes changes to fold loads into cmp/test instructions in
the X86 backend, along with a significant simplification to the X86 spill
folding code.

llvm-svn: 30108
 2006-09-05 02:12:02 +00:00
Chris Lattner 70fd01a1b8 Make sure to clear CurDefmPrefix = 0, otherwise stuff after a defm won't 
parse right.  This fixes TableGen/MultiClass.td

llvm-svn: 30037
 2006-09-01 22:07:27 +00:00
Chris Lattner c05fac8b83 fix an assertion with multidefs. Def inside of multiclasses don't need to 
be complete.

llvm-svn: 30034
 2006-09-01 21:59:03 +00:00
Chris Lattner aec1af2239 regenerate 
llvm-svn: 30029
 2006-09-01 21:14:42 +00:00
Chris Lattner 66b7235877 Add often-requested support for defining "multiclasses" which can be instantiated. 
This allows you to define multiple definitions with one line, encouraging
more .td file factoring.

llvm-svn: 30027
 2006-09-01 21:13:49 +00:00
Reid Spencer 97c598083e Add virtual methods to all subclasses so they are not overloaded. 
llvm-svn: 29930
 2006-08-28 00:12:25 +00:00
Chris Lattner 251468e9d0 Use compiler.h instead of hand rolling our own macro 
llvm-svn: 29913
 2006-08-27 13:16:24 +00:00
Evan Cheng 44ce57d5c2 Do not emit getTargetNode() and SelectNodeTo() which takes more than 3 
SDOperand arguments. Use the variants which take an array and number instead.

llvm-svn: 29906
 2006-08-27 08:11:28 +00:00
Evan Cheng 34b70eea5c SelectNodeTo now returns a SDNode*. 
llvm-svn: 29901
 2006-08-26 08:00:10 +00:00
Evan Cheng b7b5ba5aaf Minor getCopyToReg() call change. 
llvm-svn: 29900
 2006-08-26 07:39:28 +00:00
Evan Cheng 61413a3d72 Select() no longer require Result operand by reference. 
llvm-svn: 29898
 2006-08-26 05:34:46 +00:00
Evan Cheng a8b2b6c7ff Remove dead code. 
llvm-svn: 29897
 2006-08-26 01:34:15 +00:00
Evan Cheng eaf9fba2ff A bit more clean up. 
llvm-svn: 29893
 2006-08-26 01:02:19 +00:00