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1072 Commits

Author SHA1 Message Date
Chris Lattner
4a5ebe94ba Checking types here is not safe, because multiple types can map to the same 
register class.

llvm-svn: 23103
 2005-08-26 21:39:15 +00:00
Chris Lattner
373f048a79 Revampt ReplaceAllUsesWith to be more efficient and easier to use. 
llvm-svn: 23087
 2005-08-26 18:36:28 +00:00
Chris Lattner
c30405e0ee Change ConstantPoolSDNode to actually hold the Constant itself instead of 
putting it into the constant pool.  This allows the isel machinery to
create constants that it will end up deciding are not needed, without them
ending up in the resultant function constant pool.

llvm-svn: 23081
 2005-08-26 17:15:30 +00:00
Chris Lattner
2091a36631 Fix a huge annoyance: SelectNodeTo took types before the opcode unlike 
every other SD API.  Fix it to take the opcode before the types.

llvm-svn: 23079
 2005-08-26 16:36:26 +00:00
Chris Lattner
1cb550c603 Fix a nasty bug from a previous patch of mine 
llvm-svn: 23069
 2005-08-26 00:13:12 +00:00
Nate Begeman
33840c3268 New fold for SELECT_CC 
llvm-svn: 23058
 2005-08-25 20:04:38 +00:00
Chris Lattner
f9c19157df Don't auto-cse nodes that return flags 
llvm-svn: 23055
 2005-08-25 19:12:10 +00:00
Chris Lattner
9d28a56d55 simplify the code a bit using isOperationLegal 
llvm-svn: 23053
 2005-08-25 17:54:58 +00:00
Chris Lattner
407c6415b4 ADd support for TargetConstantPool nodes 
llvm-svn: 23041
 2005-08-25 05:03:06 +00:00
Chris Lattner
bbe0e7df2c add a new TargetFrameIndex node 
llvm-svn: 23035
 2005-08-25 00:43:01 +00:00
Chris Lattner
45e1ce4e28 add a method 
llvm-svn: 23027
 2005-08-24 23:00:29 +00:00
Chris Lattner
d7ee4d8671 Add ReplaceAllUsesWith that can take a vector of replacement values. 
Add some foldings to hopefully help the illegal setcc issue, and move some code around.

llvm-svn: 23025
 2005-08-24 22:44:39 +00:00
Chris Lattner
86b1658d58 teach selection dag mask tracking about the fact that select_cc operates like 
select.  Also teach it that the bit count instructions can only set the low bits
of the result, depending on the size of the input.

This allows us to compile this:

int %eq0(int %a) {
        %tmp.1 = seteq int %a, 0                ; <bool> [#uses=1]
        %tmp.2 = cast bool %tmp.1 to int                ; <int> [#uses=1]
        ret int %tmp.2
}

To this:

_eq0:
        cntlzw r2, r3
        srwi r3, r2, 5
        blr

instead of this:

_eq0:
        cntlzw r2, r3
        rlwinm r3, r2, 27, 31, 31
        blr

when setcc is marked illegal on ppc (which restores parity to non-illegal
setcc).  Thanks to Nate for pointing this out.

llvm-svn: 23013
 2005-08-24 16:46:55 +00:00
Nate Begeman
45bbbb3f11 Teach SelectionDAG how to simplify a few more setcc-equivalent select_cc 
nodes so that backends don't have to.

llvm-svn: 22999
 2005-08-24 04:57:57 +00:00
Nate Begeman
72eab5dd5c Fix optimization of select_cc seteq X, 0, 1, 0 -> srl (ctlz X), log2 X size 
llvm-svn: 22995
 2005-08-24 00:21:28 +00:00
Nate Begeman
bf8c3939d7 Teach the SelectionDAG how to transform select_cc eq, X, 0, 1, 0 into 
either seteq X, 0 or srl (ctlz X), size(X-1), depending on what's legal
for the target.

llvm-svn: 22978
 2005-08-23 05:41:12 +00:00
Chris Lattner
466fecee19 add anew method 
llvm-svn: 22957
 2005-08-21 22:30:30 +00:00
Chris Lattner
0548f50501 add a method 
llvm-svn: 22955
 2005-08-21 19:48:59 +00:00
Chris Lattner
707b39fb8c add a method 
llvm-svn: 22949
 2005-08-21 18:49:33 +00:00
Chris Lattner
1be7eddecf Add support for TargetGlobalAddress nodes 
llvm-svn: 22938
 2005-08-19 22:31:04 +00:00
Chris Lattner
0875d1ab89 Fix a bug in previous commit 
llvm-svn: 22936
 2005-08-19 21:34:13 +00:00
Chris Lattner
4990335eb8 Print physreg register nodes with target names (e.g. F1) instead of numbers 
llvm-svn: 22934
 2005-08-19 21:21:16 +00:00
Jeff Cohen
d1f22b1282 Fix VC++ precedence warning. 
llvm-svn: 22902
 2005-08-19 04:39:48 +00:00
Nate Begeman
19a271a67b Add support for target DAG nodes that take 4 operands, such as PowerPC's 
rlwinm.

llvm-svn: 22856
 2005-08-18 07:30:15 +00:00
Chris Lattner
802080d812 Fix printing of VTSDNodes 
llvm-svn: 22853
 2005-08-18 03:31:02 +00:00
Jim Laskey
d66e616545 Move the code dependency for MathExtras.h from SelectionDAGNodes.h. 
Added some class dividers in SelectionDAG.cpp.

llvm-svn: 22841
 2005-08-17 20:08:02 +00:00
Jim Laskey
b74c666186 Culling out use of unions for converting FP to bits and vice versa. 
llvm-svn: 22838
 2005-08-17 19:34:49 +00:00
Chris Lattner
ab0de9d7fc Fix a bug in RemoveDeadNodes where it would crash when its "optional" 
argument is not specified.

Implement ReplaceAllUsesWith.

llvm-svn: 22834
 2005-08-17 19:00:20 +00:00
Chris Lattner
0d2456e1f0 add a new TargetConstant node 
llvm-svn: 22813
 2005-08-17 00:34:06 +00:00
Chris Lattner
33182325f5 Eliminate the RegSDNode class, which 3 nodes (CopyFromReg/CopyToReg/ImplicitDef) 
used to tack a register number onto the node.

Instead of doing this, make a new node, RegisterSDNode, which is a leaf
containing a register number.  These three operations just become normal
DAG nodes now, instead of requiring special handling.

Note that with this change, it is no longer correct to make illegal
CopyFromReg/CopyToReg nodes.  The legalizer will not touch them, and this
is bad, so don't do it. :)

llvm-svn: 22806
 2005-08-16 21:55:35 +00:00
Nate Begeman
371e49515d Implement BR_CC and BRTWOWAY_CC. This allows the removal of a rather nasty 
fixme from the PowerPC backend.  Emit slightly better code for legalizing
select_cc.

llvm-svn: 22805
 2005-08-16 19:49:35 +00:00
Chris Lattner
bc89226527 Allow passing a dag into dump and getOperationName. If one is available 
when printing a node, use it to render target operations with their
target instruction name instead of "<<unknown>>".

llvm-svn: 22804
 2005-08-16 18:33:07 +00:00
Chris Lattner
1973278b38 Add some methods for dag->dag isel. 
Split RemoveNodeFromCSEMaps out of DeleteNodesIfDead to do it.

llvm-svn: 22801
 2005-08-16 18:17:10 +00:00
Nate Begeman
dc3154ec66 Remove an unncessary argument to SimplifySelectCC and add an additional 
assert when creating a select_cc node.

llvm-svn: 22780
 2005-08-13 06:14:17 +00:00
Nate Begeman
b6651e81a0 Fix the fabs regression on x86 by abstracting the select_cc optimization 
out into SimplifySelectCC.  This allows both ISD::SELECT and ISD::SELECT_CC
to use the same set of simplifying folds.

llvm-svn: 22779
 2005-08-13 06:00:21 +00:00
Chris Lattner
21381e8424 implement a couple of simple shift foldings. 
e.g.  (X & 7) >> 3   -> 0

llvm-svn: 22774
 2005-08-12 23:54:58 +00:00
Nate Begeman
5c7656fd53 Add a select_cc optimization for recognizing abs(int). This speeds up an 
integer MPEG encoding loop by a factor of two.

llvm-svn: 22758
 2005-08-11 02:18:13 +00:00
Nate Begeman
180b08897f Some SELECT_CC cleanups: 
1. move assertions for node creation to getNode()
2. legalize the values returned in ExpandOp immediately
3. Move select_cc optimizations from SELECT's getNode() to SELECT_CC's,
   allowing them to be cleaned up significantly.

This paves the way to pick up additional optimizations on SELECT_CC, such
as sum-of-absolute-differences.

llvm-svn: 22757
 2005-08-11 01:12:20 +00:00
Nate Begeman
e5b86d7442 Add new node, SELECT_CC. This node is for targets that don't natively 
implement SELECT.

llvm-svn: 22755
 2005-08-10 20:51:12 +00:00
Chris Lattner
21c0fd9e8f Fix an oversight that may be causing PR617. 
llvm-svn: 22753
 2005-08-10 17:37:53 +00:00
Chris Lattner
679f5b0b40 Fix spelling, fix some broken canonicalizations by my last patch 
llvm-svn: 22734
 2005-08-09 23:09:05 +00:00
Chris Lattner
14e060f743 add cc nodes to the AllNodes list so they show up in Graphviz output 
llvm-svn: 22731
 2005-08-09 20:40:02 +00:00
Chris Lattner
d47675ed24 Eliminate the SetCCSDNode in favor of a CondCodeSDNode class. This pulls the 
CC out of the SetCC operation, making SETCC a standard ternary operation and
CC's a standard DAG leaf.  This will make it possible for other node to use
CC's as operands in the future...

llvm-svn: 22728
 2005-08-09 20:20:18 +00:00
Chris Lattner
0c26a0b902 add a small simplification that can be exposed after promotion/expansion 
llvm-svn: 22691
 2005-08-07 05:00:44 +00:00
Chris Lattner
1095dc94a9 Fix a use-of-dangling-pointer bug, from the introduction of SrcValue's. 
llvm-svn: 22679
 2005-08-05 16:55:31 +00:00
Chris Lattner
6667bdbaca Update to use the new MathExtras.h support for log2 computation. 
Patch contributed by Jim Laskey!

llvm-svn: 22594
 2005-08-02 19:26:06 +00:00
Jeff Cohen
5f4ef3c5a8 Eliminate all remaining tabs and trailing spaces. 
llvm-svn: 22523
 2005-07-27 06:12:32 +00:00
Chris Lattner
de0a4b1987 Change *EXTLOAD to use an VTSDNode operand instead of being an MVTSDNode. 
This is the last MVTSDNode.

This allows us to eliminate a bunch of special case code for handling
MVTSDNodes.

llvm-svn: 22367
 2005-07-10 01:55:33 +00:00
Chris Lattner
36db1ed06f Change TRUNCSTORE to use a VTSDNode operand instead of being an MVTSTDNode 
llvm-svn: 22366
 2005-07-10 00:29:18 +00:00
Chris Lattner
0b6ba90a72 Introduce a new VTSDNode class with the ultimate goal of eliminating the 
MVTSDNode class.  This class is used to provide an operand to operators
that require an extra type.  We start by converting FP_ROUND_INREG and
SIGN_EXTEND_INREG over to using it.

llvm-svn: 22364
 2005-07-10 00:07:11 +00:00