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Commit Graph

147 Commits

Author SHA1 Message Date
Jim Laskey
d761e8859d 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
61e3d7bca5 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
a11bdf3abe 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
bd8cbd4951 add a new TargetConstant node
llvm-svn: 22813
2005-08-17 00:34:06 +00:00
Chris Lattner
3b7e157005 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
f6b6378f23 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
65b9983515 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
73348d1e89 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
021a5b3fe1 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
4e8f777256 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
e06d2c3760 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
09c56e0432 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
206e850add 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
eddc9d4856 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
51cf9fd316 Fix an oversight that may be causing PR617.
llvm-svn: 22753
2005-08-10 17:37:53 +00:00
Chris Lattner
3179a74493 Fix spelling, fix some broken canonicalizations by my last patch
llvm-svn: 22734
2005-08-09 23:09:05 +00:00
Chris Lattner
3290ca9983 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
0fa4402b59 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
fdb467b18d add a small simplification that can be exposed after promotion/expansion
llvm-svn: 22691
2005-08-07 05:00:44 +00:00
Chris Lattner
c7a67abac2 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
cc8ae687e1 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
bd51ec7461 Eliminate all remaining tabs and trailing spaces.
llvm-svn: 22523
2005-07-27 06:12:32 +00:00
Chris Lattner
6e49696ba6 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
273b81e0c0 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
c355896290 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
Andrew Lenharth
898efb338a restore old srcValueNode behavior and try to to work around it
llvm-svn: 22315
2005-06-29 18:54:02 +00:00
Andrew Lenharth
edccb834bb tracking the instructions causing loads and stores provides more information than just the pointer being loaded or stored
llvm-svn: 22311
2005-06-29 15:57:19 +00:00
Nate Begeman
ed49a51836 Fix bug 537 test 2, which checks to make sure that we fold A+(B-A) -> B for
integer types.  Add a couple checks to not perform these kinds of transform
on floating point values.

llvm-svn: 22228
2005-06-16 07:06:03 +00:00
Chris Lattner
811dc49f55 Add some simplifications for MULH[SU]. This allows us to compile this:
long %bar(long %X) {
  %Y = mul long %X, 4294967297
  ret long %Y
}

to this:

l1_bar:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, %EAX
        add %EDX, DWORD PTR [%ESP + 8]
        ret

instead of:

l1_bar:
        mov %ECX, DWORD PTR [%ESP + 4]
        mov %EDX, 1
        mov %EAX, %ECX
        mul %EDX
        add %EDX, %ECX
        add %EDX, DWORD PTR [%ESP + 8]
        mov %EAX, %ECX
        ret

llvm-svn: 22044
2005-05-15 05:39:08 +00:00
Chris Lattner
d9e36f94bb remove special case hacks for readport/readio from the binary operator
codepath

llvm-svn: 22019
2005-05-14 07:45:46 +00:00
Chris Lattner
d1d8fbee2d Implement fixme's by memoizing nodes.
llvm-svn: 22018
2005-05-14 07:42:29 +00:00
Chris Lattner
ac7d55f114 Turn this into a wrapper for a simpler version of getNode.
llvm-svn: 22016
2005-05-14 07:32:14 +00:00
Chris Lattner
a035798c4b Eliminate special purpose hacks for dynamic_stack_alloc.
llvm-svn: 22015
2005-05-14 07:29:57 +00:00
Chris Lattner
b94e243d14 Use the general mechanism for creating multi-value nodes instead of using
special case hacks.

llvm-svn: 22014
2005-05-14 07:25:05 +00:00
Chris Lattner
ad411081fb Wrap long line, actually add node to the graph.
llvm-svn: 22011
2005-05-14 06:42:57 +00:00
Chris Lattner
1afb5ae575 add a getNode() version that allows construction of any node type.
llvm-svn: 22009
2005-05-14 06:20:26 +00:00
Chris Lattner
3a76f85d43 Handle TAILCALL node
llvm-svn: 21957
2005-05-13 18:43:43 +00:00
Chris Lattner
51de10e0c6 fix a bad typeo
llvm-svn: 21917
2005-05-12 23:51:40 +00:00
Chris Lattner
094bbfcebb rename the ADJCALLSTACKDOWN/ADJCALLSTACKUP nodes to be CALLSEQ_START/BEGIN.
llvm-svn: 21915
2005-05-12 23:24:06 +00:00
Chris Lattner
9f40cfa0a1 handle a common case generated by the uint64 -> FP code path better
llvm-svn: 21888
2005-05-12 06:27:02 +00:00
Chris Lattner
b38ffd7fbf Make legalize a bit more efficient, and canonicalize sub X, C -> add X, -C
llvm-svn: 21882
2005-05-12 00:17:04 +00:00
Chris Lattner
296754995e Do not memoize ADJCALLSTACKDOWN nodes, provide a method to hack on them.
llvm-svn: 21871
2005-05-11 18:57:39 +00:00
Chris Lattner
ce84b90a3d Print bit count nodes correctly
llvm-svn: 21855
2005-05-11 04:50:30 +00:00
Jeff Cohen
afc58006b7 Silence some VC++ warnings
llvm-svn: 21838
2005-05-10 02:22:38 +00:00
Chris Lattner
eee649df34 Add support for READPORT, WRITEPORT, READIO, WRITEIO
llvm-svn: 21824
2005-05-09 20:22:17 +00:00
Chris Lattner
c3fa88e7c8 Fold shifts into subsequent SHL's. These shifts often arise due to addrses
arithmetic lowering.

llvm-svn: 21818
2005-05-09 17:06:45 +00:00
Chris Lattner
a1e633ef7a Don't use the load/store instruction as the source pointer, use the pointer
being stored/loaded through!

llvm-svn: 21806
2005-05-09 04:28:51 +00:00
Chris Lattner
bfbefe0837 memoize all nodes, even null Value* nodes. Do not add two token chain outputs
llvm-svn: 21805
2005-05-09 04:14:13 +00:00
Chris Lattner
6ffae1a3ec Print SrcValue nodes correctly
llvm-svn: 21803
2005-05-09 04:08:27 +00:00
Andrew Lenharth
8b64bd0fd5 Implement count leading zeros (ctlz), count trailing zeros (cttz), and count
population (ctpop).  Generic lowering is implemented, however only promotion
is implemented for SelectionDAG at the moment.

More coming soon.

llvm-svn: 21676
2005-05-03 17:19:30 +00:00