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457 Commits

Author SHA1 Message Date
Nate Begeman
551bf3f800 kill ADD_PARTS & SUB_PARTS and replace them with fancy new ADDC, ADDE, SUBC 
and SUBE nodes that actually expose what's going on and allow for
significant simplifications in the targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26255 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-17 05:43:56 +00:00
Evan Cheng
fae9f1cb34 Added SelectionDAG::InsertISelMapEntry(). This is used to workaround the gcc 
problem where it inline the map insertion call too aggressively. Before this
change it was producing a frame size of 24k for Select_store(), now it's down
to 10k (by calling this method rather than calling the map insertion operator).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26094 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-09 22:11:03 +00:00
Evan Cheng
6ae46c4c87 More changes to reduce frame size. 
Move all getTargetNode() out of SelectionDAG.h into SelectionDAG.cpp. This
prevents them from being inlined.
Change getTargetNode() so they return SDNode * instead of SDOperand to prevent
copying. It should also help compilation speed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26083 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-09 07:15:23 +00:00
Evan Cheng
4ee6211258 * Added SDNode::isOnlyUse(). 
* Fix hasNUsesOfValue(), it should be const.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25990 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-05 06:29:23 +00:00
Chris Lattner
eefae25034 remove dead fn 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25935 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-03 06:51:34 +00:00
Evan Cheng
9fda2f9106 Added case HANDLENODE to getOperationName(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25920 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-03 01:33:01 +00:00
Evan Cheng
b8973bd8f5 Allow the specification of explicit alignments for constant pool entries. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25855 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-31 22:23:14 +00:00
Chris Lattner
70814bc384 Remove some special case hacks for CALLSEQ_*, using UpdateNodeOperands 
instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25780 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-29 07:58:15 +00:00
Chris Lattner
3181a771ff Legalize ConstantFP into TargetConstantFP when the target allows. Implement 
custom expansion of ConstantFP nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25772 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-29 06:26:56 +00:00
Chris Lattner
809ec11088 add another method variant 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25744 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-28 10:09:25 +00:00
Chris Lattner
df6eb30fa9 add some methods for updating nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25742 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-28 09:32:45 +00:00
Chris Lattner
0ff5c27a00 Remove the ISD::CALL and ISD::TAILCALL nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25721 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-28 00:18:58 +00:00
Chris Lattner
ce7518ce92 initial selectiondag support for new INLINEASM node. Note that inline asms 
with outputs or inputs are not supported yet. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25664 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-26 22:24:51 +00:00
Nate Begeman
acc398c195 First part of bug 680: 
Remove TLI.LowerVA* and replace it with SDNodes that are lowered the same
way as everything else.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25606 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-25 18:21:52 +00:00
Chris Lattner
6a5428934b Fix an infinite loop I caused by making sure to legalize the flag operand 
of CALLSEQ_* nodes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25582 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-24 05:48:21 +00:00
Andrew Lenharth
7cf11b4ab2 another couple selects 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25551 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-23 21:51:14 +00:00
Andrew Lenharth
8c6f1ee5aa another selectto 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25548 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-23 20:59:12 +00:00
Nate Begeman
1b5db7aaec Constant fold ctpop/ctlz/cttz, and a couple other small cleanups 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25357 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-16 08:07:10 +00:00
Chris Lattner
cc0aad20dd add a missing node name 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25327 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-15 08:39:35 +00:00
Chris Lattner
5a67afc118 add stacksave/stackrestore nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25270 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-13 02:39:42 +00:00
Evan Cheng
140e99babc ignore register #0 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25223 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-11 22:13:48 +00:00
Nate Begeman
35ef913ec2 Add bswap, rotl, and rotr nodes 
Add dag combiner code to recognize rotl, rotr
Add ppc code to match rotl

Targets should add rotl/rotr patterns if they have them


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25222 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-11 21:21:00 +00:00
Evan Cheng
909addffc3 New getNode() variants. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25156 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-09 18:29:18 +00:00
Jim Laskey
abf6d1784b Added initial support for DEBUG_LABEL allowing debug specific labels to be 
inserted in the code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25104 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-05 01:25:28 +00:00
Nate Begeman
512beb9465 Make sure to pass the offset into the new node, so that we don't silently 
drop it on the floor.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25044 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-30 00:10:38 +00:00
Chris Lattner
c8547d856d Fold bitconv(bitconv(x)) -> x. We now compile this: 
void foo(double);
void bar(double X) { foo(X); }

to this:

bar:
        save -96, %o6, %o6
        or %g0, %i0, %o0
        or %g0, %i1, %o1
        call foo
        nop
        restore %g0, %g0, %g0
        retl
        nop

instead of this:

bar:
        save -112, %o6, %o6
        st %i1, [%i6+-4]
        st %i0, [%i6+-8]
        ldd [%i6+-8], %f0
        std %f0, [%i6+-16]
        ld [%i6+-12], %o1
        ld [%i6+-16], %o0
        call foo
        nop
        restore %g0, %g0, %g0
        retl
        nop

on V8.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24981 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-23 05:37:50 +00:00
Chris Lattner
94683777ae constant fold bits_convert in getNode and in the dag combiner for fp<->int 
conversions.  This allows V8 to compiles this:

void %test() {
        call float %test2( float 1.000000e+00, float 2.000000e+00, double 3.000000e+00, double* null )
        ret void
}

into:

test:
        save -96, %o6, %o6
        sethi 0, %o3
        sethi 1049088, %o2
        sethi 1048576, %o1
        sethi 1040384, %o0
        or %g0, %o3, %o4
        call test2
        nop
        restore %g0, %g0, %g0
        retl
        nop

instead of:

test:
        save -112, %o6, %o6
        sethi 0, %o4
        sethi 1049088, %l0
        st %o4, [%i6+-12]
        st %l0, [%i6+-16]
        ld [%i6+-12], %o3
        ld [%i6+-16], %o2
        sethi 1048576, %o1
        sethi 1040384, %o0
        call test2
        nop
        restore %g0, %g0, %g0
        retl
        nop


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24980 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-23 05:30:37 +00:00
Chris Lattner
35481892da add very simple support for the BIT_CONVERT node 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24970 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-23 00:16:34 +00:00
Chris Lattner
0fcd40f501 remove dead code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24965 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-22 21:16:08 +00:00
Evan Cheng
7226158d7e Added a hook to print out names of target specific DAG nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24877 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-20 06:22:03 +00:00
Evan Cheng
115c036a4c Print out opcode number if it's an unknown target node. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24869 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-19 23:11:49 +00:00
Chris Lattner
9f8cc69009 Fix a case where the DAG Combiner would accidentally CSE flag-producing nodes, 
creating graphs that cannot be scheduled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24866 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-19 22:21:21 +00:00
Jim Laskey
f5395cee6a Added source file/line correspondence for dwarf (PowerPC only at this point.) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24748 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-16 22:45:29 +00:00
Evan Cheng
7038daf342 Added new getNode and getTargetNode variants for X86 stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24653 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-10 00:37:58 +00:00
Nate Begeman
8cfa57b1b4 Teach the SelectionDAG ISel how to turn ConstantPacked values into 
constant nodes with vector types.  Also teach the asm printer how to print
ConstantPacked constant pool entries.  This allows us to generate altivec
code such as the following, which adds a vector constantto a packed float.

LCPI1_0:  <4 x float> < float 0.0e+0, float 0.0e+0, float 0.0e+0, float 1.0e+0 >
        .space  4
        .space  4
        .space  4
        .long   1065353216      ; float 1
        .text
        .align  4
        .globl  _foo
_foo:
        lis r2, ha16(LCPI1_0)
        la r2, lo16(LCPI1_0)(r2)
        li r4, 0
        lvx v0, r4, r2
        lvx v1, r4, r3
        vaddfp v0, v1, v0
        stvx v0, r4, r3
        blr

For the llvm code:

void %foo(<4 x float> * %a) {
entry:
  %tmp1 = load <4 x float> * %a;
  %tmp2 = add <4 x float> %tmp1, < float 0.0, float 0.0, float 0.0, float 1.0 >
  store <4 x float> %tmp2, <4 x float> *%a
  ret void
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24616 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-06 06:18:55 +00:00
Chris Lattner
fe14b34d83 Don't remove two operand, two result nodes from the binary ops map. These 
should come from the arbitrary ops map.

This fixes Regression/CodeGen/PowerPC/2005-12-01-Crash.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24571 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-01 23:14:50 +00:00
Chris Lattner
c5e6c649b5 This is a bugfix for SelectNodeTo. In certain situations, we could be 
selecting a node and use a mix of getTargetNode() and SelectNodeTo.  Because
SelectNodeTo didn't check the CSE maps for a preexisting node and didn't insert
its result into the CSE maps, we would sometimes miss a CSE opportunity.

This is extremely rare, but worth fixing for completeness.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24565 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-01 18:00:57 +00:00
Chris Lattner
eb19e40efb Make SelectNodeTo return N 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24548 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 22:45:14 +00:00
Chris Lattner
c85a9f37e9 CALLSEQ_START/END nodes don't get memoized, do not add them in when 
replaceAllUses'ing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24539 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 18:20:52 +00:00
Evan Cheng
14229bb636 Fixed a bug introduced by my last commit: TargetGlobalValues should key on 
GlobalValue * and index pair. Update getGlobalAddress() for symmetry.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24524 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 02:49:21 +00:00
Evan Cheng
61ca74bc3a Added an index field to GlobalAddressSDNode so it can represent X+12, etc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24523 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 02:04:11 +00:00
Chris Lattner
36ce69195e Add support for a new STRING and LOCATION node for line number support, patch 
contributed by Daniel Berlin, with a few cleanups here and there by me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24515 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-29 06:21:05 +00:00
Nate Begeman
ab48be3772 Check in code to scalarize arbitrarily wide packed types for some simple 
vector operations (load, add, sub, mul).

This allows us to codegen:
void %foo(<4 x float> * %a) {
entry:
  %tmp1 = load <4 x float> * %a;
  %tmp2 = add <4 x float> %tmp1, %tmp1
  store <4 x float> %tmp2, <4 x float> *%a
  ret void
}

on ppc as:
_foo:
        lfs f0, 12(r3)
        lfs f1, 8(r3)
        lfs f2, 4(r3)
        lfs f3, 0(r3)
        fadds f0, f0, f0
        fadds f1, f1, f1
        fadds f2, f2, f2
        fadds f3, f3, f3
        stfs f0, 12(r3)
        stfs f1, 8(r3)
        stfs f2, 4(r3)
        stfs f3, 0(r3)
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24484 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-22 18:16:00 +00:00
Chris Lattner
0fb094fd60 Add some method variants, patch by Evan Cheng 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24418 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-19 01:44:53 +00:00
Nate Begeman
5fbb5d2459 Teach LLVM how to scalarize packed types. Currently, this only works on 
packed types with an element count of 1, although more generic support is
coming.  This allows LLVM to turn the following code:

void %foo(<1 x float> * %a) {
entry:
  %tmp1 = load <1 x float> * %a;
  %tmp2 = add <1 x float> %tmp1, %tmp1
  store <1 x float> %tmp2, <1 x float> *%a
  ret void
}

Into:

_foo:
        lfs f0, 0(r3)
        fadds f0, f0, f0
        stfs f0, 0(r3)
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24416 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-19 00:36:38 +00:00
Andrew Lenharth
51b8d54922 continued readcyclecounter support 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24300 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-11 16:47:30 +00:00
Chris Lattner
de202b3cda Switch the allnodes list from a vector of pointers to an ilist of nodes.This eliminates the vector, allows constant time removal of a node froma graph, and makes iteration over the all nodes list stable when adding 
nodes to the graph.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24263 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-09 23:47:37 +00:00
Chris Lattner
a32551197a Change the ValueList array for each node to be shared instead of individuallyallocated. Further, in the common case where a node has a single value, justreference an element from a small array. This is a small compile-time win. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24251 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-08 23:30:28 +00:00
Chris Lattner
65113b2f86 Switch the operandlist/valuelist from being vectors to being just an array.This saves 12 bytes from SDNode, but doesn't speed things up substantially 
(our graphs apparently already fit within the cache on my g5).  In any case
this reduces memory usage.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24249 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-08 22:07:03 +00:00
Chris Lattner
f469cb6546 Clean up RemoveDeadNodes significantly, by eliminating the need for a temporary 
set and eliminating the need to iterate whenever something is removed (which
can be really slow in some cases).  Thx to Jim for pointing out something silly
I was getting stuck on. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24241 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-08 18:52:27 +00:00
Andrew Lenharth
2a2de66db2 add TargetExternalSymbol 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23886 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-23 03:40:17 +00:00
Nate Begeman
ded4963ab9 Move some Legalize functionality over to the DAGCombiner where it belongs. 
Kill some dead code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23706 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-13 03:11:28 +00:00
Chris Lattner
3892560680 This function is now dead 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23684 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-10 16:49:22 +00:00
Chris Lattner
af21d55aee Enable Nate's excellent DAG combiner work by default. This allows the 
removal of a bunch of ad-hoc and crufty code from SelectionDAG.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23682 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-10 16:47:10 +00:00
Chris Lattner
ee899e6bfc (X & Y) & C == 0 if either X&C or Y&C are zero 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23678 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-09 22:12:36 +00:00
Chris Lattner
9a9719eea1 remove debugging code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23663 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 15:31:26 +00:00
Chris Lattner
c4ced268d8 implement CodeGen/PowerPC/div-2.ll:test2-4 by propagating zero bits through 
C-X's


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23662 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 15:30:32 +00:00
Chris Lattner
6c4dad0b8b fix indentation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23660 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 06:37:02 +00:00
Chris Lattner
094c8fcd14 Turn sdivs into udivs when we can prove the sign bits are clear. This 
implements CodeGen/PowerPC/div-2.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23659 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-07 06:10:46 +00:00
Nate Begeman
0558f61b0c Let the combiner handle more cases 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23641 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 21:44:43 +00:00
Chris Lattner
3ea0b47f81 implement visitBR_CC so that PowerPC/inverted-bool-compares.ll passes 
with the dag combiner.  This speeds up espresso by 8%, reaching performance
parity with the dag-combiner-disabled llc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23636 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 06:47:48 +00:00
Chris Lattner
ad13715ed4 fix some pastos 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23635 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 06:37:22 +00:00
Chris Lattner
9503859c54 Add a new HandleNode class, which is used to handle (haha) cases in the 
dead node elim and dag combiner passes where the root is potentially updated.
This fixes a fixme in the dag combiner.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23634 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-05 06:35:28 +00:00
Chris Lattner
01b3d73c20 Add FP versions of the binary operators, keeping the int and fp worlds seperate. 
Though I have done extensive testing, it is possible that this will break
things in configs I can't test.  Please let me know if this causes a problem
and I'll fix it ASAP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23504 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:28:18 +00:00
Chris Lattner
5ae7911b24 Turn (X^C1) == C2 into X == C1^C2 iff X&~C1 = 0 (and move a function) 
This happens all the time on PPC for bool values, e.g. eliminating a xori
in inverted-bool-compares.ll.

This should be added to the dag combiner as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23403 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 00:55:52 +00:00
Chris Lattner
3ec5d74fc5 Fix a problem duraid encountered on itanium where this folding: 
select (x < y), 1, 0 -> (x < y) incorrectly: the setcc returns i1 but the
select returned i32.  Add the zero extend as needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23301 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 23:00:07 +00:00
Chris Lattner
08addbd477 Fix a crash viewing dags that have target nodes in them 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23300 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 22:35:03 +00:00
Nate Begeman
39ee1ac7e5 Last round of 2-node folds from SD.cpp. Will move on to 3 node ops such 
as setcc and select next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23295 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 19:49:52 +00:00
Nate Begeman
223df2269d Move yet more folds over to the dag combiner from sd.cpp 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23278 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 20:18:10 +00:00
Nate Begeman
9980119270 Another round of dag combiner changes. This fixes some missing XOR folds 
as well as fixing how we replace old values with new values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23260 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 23:25:52 +00:00
Chris Lattner
1e111c7bbb Fix a bug nate ran into with replacealluseswith. In the recursive cse case, 
we were losing a node, causing an assertion to fail.  Now we eagerly delete
discovered CSE's, and provide an optional vector to keep track of these
discovered equivalences.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23255 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 05:37:01 +00:00
Chris Lattner
6a8a21ced4 Fix a checking failure in gs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23235 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:04:40 +00:00
Chris Lattner
70b9b1098a Make sure to auto-cse nullary ops 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23224 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:36:17 +00:00
Chris Lattner
6621e3b963 Fix some buggy logic where we would try to remove nodes with two operands 
from the binary ops map, even if they had multiple results.  This latent bug
caused a few failures with the dag isel last night.

To prevent stuff like this from happening in the future, add some really
strict checking to make sure that the CSE maps always match up with reality!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23221 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:15:44 +00:00
Chris Lattner
4ed11b4b79 Add support for ANY_EXTEND and add a few minor folds for it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23203 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:17:32 +00:00
Nate Begeman
39f60a2302 Fix some code in the current node combining code, spotted when it was moved 
over to DAGCombiner.cpp

1. Don't assume that SetCC returns i1 when folding (xor (setcc) constant)
2. Don't duplicate code in folding AND with AssertZext that is handled by
   MaskedValueIsZero


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23196 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:25:49 +00:00
Jeff Cohen
7383ce4127 Fix VC++ precedence warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23169 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 02:47:06 +00:00
Nate Begeman
fe75a2836a Sigh, not my day. Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23166 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:43:49 +00:00
Nate Begeman
9f52f2838d Fix a mistake in my previous patch pointed out by sabre; the AssertZext 
case in MaskedValueIsZero was wrong.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23165 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:43:08 +00:00
Nate Begeman
b85dfab889 Remove some unnecessary casts, and add the AssertZext case to 
MaskedValueIsZero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23164 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:27:53 +00:00
Chris Lattner
0fdd768094 Allow physregs to occur in the dag with multiple types. Though I don't likethis, it is a requirement on PPC, which can have an f32 value in r3 at onepoint in a function and a f64 value in r3 at another point. :( 
This fixes compilation of mesa


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23161 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 22:38:38 +00:00
Nate Begeman
5ffcd9b56c Remove a bogus piece of my AssertSext/AssertZext patch. oops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23148 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 02:54:28 +00:00
Nate Begeman
56eb86806d Add support for AssertSext and AssertZext, folding other extensions with 
them.  This allows for elminination of redundant extends in the entry
blocks of functions on PowerPC.

Add support for i32 x i32 -> i64 multiplies, by recognizing when the inputs
to ISD::MUL in ExpandOp are actually just extended i32 values and not real
i64 values.  this allows us to codegen

int mulhs(int a, int b) { return ((long long)a * b) >> 32; }
as:
_mulhs:
        mulhw r3, r4, r3
        blr

instead of:
_mulhs:
        mulhwu r2, r4, r3
        srawi r5, r3, 31
        mullw r5, r4, r5
        add r2, r2, r5
        srawi r4, r4, 31
        mullw r3, r4, r3
        add r3, r2, r3
        blr

with a similar improvement on x86.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23147 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 02:44:00 +00:00
Chris Lattner
c26aefa15a Add a new API for Nate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23131 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-29 21:59:31 +00:00
Chris Lattner
ff01698ec0 Fix a bug in ReplaceAllUsesWith 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23122 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-28 23:59:36 +00:00
Chris Lattner
579cfabdad Checking types here is not safe, because multiple types can map to the same 
register class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23103 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 21:39:15 +00:00
Chris Lattner
8b52f21f10 Revampt ReplaceAllUsesWith to be more efficient and easier to use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23087 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 18:36:28 +00:00
Chris Lattner
5839bf2b3b 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23081 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 17:15:30 +00:00
Chris Lattner
2bb06cdf27 Fix a huge annoyance: SelectNodeTo took types before the opcode unlike 
every other SD API.  Fix it to take the opcode before the types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23079 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 16:36:26 +00:00
Chris Lattner
f07d023dd9 Fix a nasty bug from a previous patch of mine 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23069 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 00:13:12 +00:00
Nate Begeman
1999b4b974 New fold for SELECT_CC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23058 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-25 20:04:38 +00:00
Chris Lattner
43247a157b Don't auto-cse nodes that return flags 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23055 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-25 19:12:10 +00:00
Chris Lattner
9d338cf3a3 simplify the code a bit using isOperationLegal 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23053 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-25 17:54:58 +00:00
Chris Lattner
4025a9c2cc ADd support for TargetConstantPool nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23041 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-25 05:03:06 +00:00
Chris Lattner
afb2dd43de add a new TargetFrameIndex node 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23035 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-25 00:43:01 +00:00
Chris Lattner
7651fa4a7e add a method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23027 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-24 23:00:29 +00:00
Chris Lattner
7b2880c4cd 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23025 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-24 22:44:39 +00:00
Chris Lattner
1d6373c1af 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23013 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-24 16:46:55 +00:00
Nate Begeman
cebd433d8d Teach SelectionDAG how to simplify a few more setcc-equivalent select_cc 
nodes so that backends don't have to.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22999 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-24 04:57:57 +00:00
Nate Begeman
0750a40a4f Fix optimization of select_cc seteq X, 0, 1, 0 -> srl (ctlz X), log2 X size 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22995 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-24 00:21:28 +00:00
Nate Begeman
7042f15bde 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22978 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-23 05:41:12 +00:00
Chris Lattner
c975e1dedc add anew method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22957 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 22:30:30 +00:00
Chris Lattner
99baddaf57 add a method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22955 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 19:48:59 +00:00
Chris Lattner
6b09a29604 add a method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22949 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 18:49:33 +00:00
Chris Lattner
aaaa0b67dd Add support for TargetGlobalAddress nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22938 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 22:31:04 +00:00
Chris Lattner
fa164b61d1 Fix a bug in previous commit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22936 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 21:34:13 +00:00
Chris Lattner
7228aa7868 Print physreg register nodes with target names (e.g. F1) instead of numbers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22934 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 21:21:16 +00:00
Jeff Cohen
a92b7c36e9 Fix VC++ precedence warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22902 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 04:39:48 +00:00
Nate Begeman
294a0a103d Add support for target DAG nodes that take 4 operands, such as PowerPC's 
rlwinm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22856 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 07:30:15 +00:00
Chris Lattner
a23e8154dc Fix printing of VTSDNodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22853 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 03:31:02 +00:00
Jim Laskey
58b968be85 Move the code dependency for MathExtras.h from SelectionDAGNodes.h. 
Added some class dividers in SelectionDAG.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22841 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 20:08:02 +00:00
Jim Laskey
cb6682fa44 Culling out use of unions for converting FP to bits and vice versa. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22838 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 19:34:49 +00:00
Chris Lattner
8b8749f367 Fix a bug in RemoveDeadNodes where it would crash when its "optional" 
argument is not specified.

Implement ReplaceAllUsesWith.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22834 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 19:00:20 +00:00
Chris Lattner
37bfbb47de add a new TargetConstant node 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22813 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 00:34:06 +00:00
Chris Lattner
d5d0f9bd20 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. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22806 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-16 21:55:35 +00:00
Nate Begeman
7cbd525ba8 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22805 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-16 19:49:35 +00:00
Chris Lattner
f3e133a35f 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>>".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22804 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-16 18:33:07 +00:00
Chris Lattner
149c58ce0b Add some methods for dag->dag isel. 
Split RemoveNodeFromCSEMaps out of DeleteNodesIfDead to do it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22801 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-16 18:17:10 +00:00
Nate Begeman
ff66368a5f Remove an unncessary argument to SimplifySelectCC and add an additional 
assert when creating a select_cc node.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22780 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-13 06:14:17 +00:00
Nate Begeman
32c392a3a5 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22779 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-13 06:00:21 +00:00
Chris Lattner
3e27b1f5c4 implement a couple of simple shift foldings. 
e.g.  (X & 7) >> 3   -> 0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22774 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-12 23:54:58 +00:00
Nate Begeman
e1fae4a3ae Add a select_cc optimization for recognizing abs(int). This speeds up an 
integer MPEG encoding loop by a factor of two.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22758 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-11 02:18:13 +00:00
Nate Begeman
e5d63829fd 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22757 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-11 01:12:20 +00:00
Nate Begeman
9373a81e53 Add new node, SELECT_CC. This node is for targets that don't natively 
implement SELECT.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22755 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-10 20:51:12 +00:00
Chris Lattner
7c6e452d44 Fix an oversight that may be causing PR617. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22753 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-10 17:37:53 +00:00
Chris Lattner
bd8625b062 Fix spelling, fix some broken canonicalizations by my last patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22734 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-09 23:09:05 +00:00
Chris Lattner
079a27a0de add cc nodes to the AllNodes list so they show up in Graphviz output 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22731 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-09 20:40:02 +00:00
Chris Lattner
7cf7e3f33f 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...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22728 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-09 20:20:18 +00:00
Chris Lattner
bf3fa976ee add a small simplification that can be exposed after promotion/expansion 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22691 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-07 05:00:44 +00:00
Chris Lattner
c534395cb2 Fix a use-of-dangling-pointer bug, from the introduction of SrcValue's. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22679 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-05 16:55:31 +00:00
Chris Lattner
0561b3ff9f Update to use the new MathExtras.h support for log2 computation. 
Patch contributed by Jim Laskey!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22594 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 19:26:06 +00:00
Jeff Cohen
00b16889ab Eliminate all remaining tabs and trailing spaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22523 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-27 06:12:32 +00:00
Chris Lattner
5f056bf4b8 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22367 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-10 01:55:33 +00:00
Chris Lattner
9fadb4c1c0 Change TRUNCSTORE to use a VTSDNode operand instead of being an MVTSTDNode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22366 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-10 00:29:18 +00:00
Chris Lattner
15e4b01920 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22364 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-10 00:07:11 +00:00
Andrew Lenharth
06ef88472f restore old srcValueNode behavior and try to to work around it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22315 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-29 18:54:02 +00:00
Andrew Lenharth
782ad62f33 tracking the instructions causing loads and stores provides more information than just the pointer being loaded or stored 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22311 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-29 15:57:19 +00:00
Nate Begeman
41aaf7016e 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22228 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-16 07:06:03 +00:00
Chris Lattner
e5eb6f829c 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22044 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 05:39:08 +00:00
Chris Lattner
3e01136f9f remove special case hacks for readport/readio from the binary operator 
codepath


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22019 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:45:46 +00:00
Chris Lattner
385328ce41 Implement fixme's by memoizing nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22018 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:42:29 +00:00
Chris Lattner
b7f7d51422 Turn this into a wrapper for a simpler version of getNode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22016 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:32:14 +00:00
Chris Lattner
adf6c2a0cb Eliminate special purpose hacks for dynamic_stack_alloc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22015 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:29:57 +00:00
Chris Lattner
e89083a930 Use the general mechanism for creating multi-value nodes instead of using 
special case hacks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22014 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:25:05 +00:00
Chris Lattner
5fa4fa4e0f Wrap long line, actually add node to the graph. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22011 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 06:42:57 +00:00
Chris Lattner
89c34637cb add a getNode() version that allows construction of any node type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22009 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 06:20:26 +00:00
Chris Lattner
d71c04199c Handle TAILCALL node 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21957 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 18:43:43 +00:00
Chris Lattner
a364fa126a fix a bad typeo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21917 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 23:51:40 +00:00
Chris Lattner
16cd04d26c rename the ADJCALLSTACKDOWN/ADJCALLSTACKUP nodes to be CALLSEQ_START/BEGIN. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21915 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 23:24:06 +00:00
Chris Lattner
6980d8295f handle a common case generated by the uint64 -> FP code path better 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21888 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 06:27:02 +00:00
Chris Lattner
88de6e77bf Make legalize a bit more efficient, and canonicalize sub X, C -> add X, -C 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21882 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 00:17:04 +00:00
Chris Lattner
27e9b41464 Do not memoize ADJCALLSTACKDOWN nodes, provide a method to hack on them. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21871 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 18:57:39 +00:00
Chris Lattner
276260b16d Print bit count nodes correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21855 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 04:50:30 +00:00
Jeff Cohen
19bb2283e6 Silence some VC++ warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21838 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 02:22:38 +00:00
Chris Lattner
3c6910153c Add support for READPORT, WRITEPORT, READIO, WRITEIO 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21824 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:22:17 +00:00
Chris Lattner
57aa5961a9 Fold shifts into subsequent SHL's. These shifts often arise due to addrses 
arithmetic lowering.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21818 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 17:06:45 +00:00
Chris Lattner
fd414a27fd Don't use the load/store instruction as the source pointer, use the pointer 
being stored/loaded through!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21806 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 04:28:51 +00:00
Chris Lattner
0437cdd6dc memoize all nodes, even null Value* nodes. Do not add two token chain outputs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21805 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 04:14:13 +00:00
Chris Lattner
2bf3c26b2b Print SrcValue nodes correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21803 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 04:08:27 +00:00
Andrew Lenharth
691ef2ba06 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21676 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 17:19:30 +00:00
Chris Lattner
7f64464ff1 Add FSQRT, FSIN, FCOS nodes, patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21605 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 21:44:03 +00:00
Andrew Lenharth
2d86ea21dd Implement Value* tracking for loads and stores in the selection DAG. This enables one to use alias analysis in the backends. 
(TRUNK)Stores and (EXT|ZEXT|SEXT)Loads have an extra SDOperand which is a SrcValueSDNode which contains the Value*.  Note that if the operation is introduced by the backend, it will still have the operand, but the value* will be null.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21599 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 20:10:01 +00:00
Chris Lattner
d36f979085 Fold (X > -1) | (Y > -1) --> (X&Y > -1) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21552 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-26 01:18:33 +00:00
Chris Lattner
229ab2e7b2 implement some more logical compares with constants, so that: 
int foo1(int x, int y) {
  int t1 = x >= 0;
  int t2 = y >= 0;
  return t1 & t2;
}
int foo2(int x, int y) {
  int t1 = x == -1;
  int t2 = y == -1;
  return t1 & t2;
}

produces:

_foo1:
        or r2, r4, r3
        srwi r2, r2, 31
        xori r3, r2, 1
        blr
_foo2:
        and r2, r4, r3
        addic r2, r2, 1
        li r2, 0
        addze r3, r2
        blr

instead of:

_foo1:
        srwi r2, r4, 31
        xori r2, r2, 1
        srwi r3, r3, 31
        xori r3, r3, 1
        and r3, r2, r3
        blr
_foo2:
        addic r2, r4, 1
        li r2, 0
        addze r2, r2
        addic r3, r3, 1
        li r3, 0
        addze r3, r3
        and r3, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21547 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 21:20:28 +00:00
Chris Lattner
6ea9279304 Codegen x < 0 | y < 0 as (x|y) < 0. This allows us to compile this to: 
_foo:
        or r2, r4, r3
        srwi r3, r2, 31
        blr

instead of:

_foo:
        srwi r2, r4, 31
        srwi r3, r3, 31
        or r3, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21544 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-25 21:03:25 +00:00
Misha Brukman
dedf2bd5a3 Convert tabs to spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21439 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-22 04:01:18 +00:00
Misha Brukman
edf128a7fa Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21420 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 22:36:52 +00:00
Chris Lattner
588bbbffa1 Improve and elimination. On PPC, for: 
bool %test(int %X) {
        %Y = and int %X, 8
        %Z = setne int %Y, 0
        ret bool %Z
}

we now generate this:

        rlwinm r2, r3, 0, 28, 28
        srwi r3, r2, 3

instead of this:

        rlwinm r2, r3, 0, 28, 28
        srwi r2, r2, 3
        rlwinm r3, r2, 0, 31, 31

I'll leave it to Nate to get it down to one instruction. :)

---------------------------------------------------------------------


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21391 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 06:28:15 +00:00
Chris Lattner
1c2a9b95dc Fold (x & 8) != 0 and (x & 8) == 8 into (x & 8) >> 3. 
This turns this PPC code:

        rlwinm r2, r3, 0, 28, 28
        cmpwi cr7, r2, 8
        mfcr r2
        rlwinm r3, r2, 31, 31, 31

into this:

        rlwinm r2, r3, 0, 28, 28
        srwi r2, r2, 3
        rlwinm r3, r2, 0, 31, 31

Next up, nuking the extra and.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21390 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 06:12:41 +00:00
Chris Lattner
fda2b55e1b Fold setcc of MVT::i1 operands into logical operations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21319 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 04:48:12 +00:00
Chris Lattner
4a44c8df19 Another minor simplification: handle setcc (zero_extend x), c -> setcc(x, c') 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21318 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 04:30:45 +00:00
Chris Lattner
7467c9b086 Another simple xform 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21317 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 04:11:19 +00:00
Chris Lattner
706aa9685a Fold: 
// (X != 0) | (Y != 0) -> (X|Y != 0)
        // (X == 0) & (Y == 0) -> (X|Y == 0)

Compiling this:

int %bar(int %a, int %b) {
        entry:
        %tmp.1 = setne int %a, 0
        %tmp.2 = setne int %b, 0
        %tmp.3 = or bool %tmp.1, %tmp.2
        %retval = cast bool %tmp.3 to int
        ret int %retval
        }

to this:

_bar:
        or r2, r3, r4
        addic r3, r2, -1
        subfe r3, r3, r2
        blr

instead of:

_bar:
        addic r2, r3, -1
        subfe r2, r2, r3
        addic r3, r4, -1
        subfe r3, r3, r4
        or r3, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21316 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 03:59:53 +00:00
Chris Lattner
36019aa5c6 Make the AND elimination operation recursive and significantly more powerful, 
eliminating an and for Nate's testcase:

int %bar(int %a, int %b) {
        entry:
        %tmp.1 = setne int %a, 0
        %tmp.2 = setne int %b, 0
        %tmp.3 = or bool %tmp.1, %tmp.2
        %retval = cast bool %tmp.3 to int
        ret int %retval
        }

generating:

_bar:
        addic r2, r3, -1
        subfe r2, r2, r3
        addic r3, r4, -1
        subfe r3, r3, r4
        or r3, r2, r3
        blr

instead of:

_bar:
        addic r2, r3, -1
        subfe r2, r2, r3
        addic r3, r4, -1
        subfe r3, r3, r4
        or r2, r2, r3
        rlwinm r3, r2, 0, 31, 31
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21315 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-18 03:48:41 +00:00
Nate Begeman
72ea281d61 Add a couple missing transforms in getSetCC that were triggering assertions 
in the PPC Pattern ISel


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21297 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-14 08:56:52 +00:00
Nate Begeman
eea805e74c Disbale the broken fold of shift + sz[ext] for now 
Move the transform for select (a < 0) ? b : 0 into the dag from ppc isel
Enable the dag to fold and (setcc, 1) -> setcc for targets where setcc
  always produces zero or one.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21291 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 21:23:31 +00:00
Chris Lattner
97e001dec7 fix an infinite loop 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21289 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 20:06:29 +00:00
Chris Lattner
fd8d389ede fix some serious miscompiles on ia64, alpha, and ppc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21288 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 19:53:40 +00:00
Chris Lattner
51679c430f avoid work when possible, perhaps fix the problem nate and andrew are seeing 
with != 0 comparisons vanishing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21287 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 19:41:05 +00:00
Chris Lattner
e666fcfbdd add back the optimization that Nate added for shl X, (zext_inreg y) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21273 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 02:58:13 +00:00
Chris Lattner
8a8dbfa57c Oops, remove these too. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21272 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 02:47:57 +00:00
Chris Lattner
0f2287baa1 Remove all foldings of ZERO_EXTEND_INREG, moving them to work for AND nodes 
instead.  OVerall, this increases the amount of folding we can do.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21265 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 02:38:18 +00:00
Nate Begeman
db81ebab89 Fold shift x, [sz]ext(y) -> shift x, y 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21262 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-12 23:32:28 +00:00
Nate Begeman
b882752bd0 Fold shift by size larger than type size to undef 
Make llvm undef values generate ISD::UNDEF nodes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21261 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-12 23:12:17 +00:00
Chris Lattner
fd1f1ee0ba Remove some redundant checks, add a couple of new ones. This allows us to 
compile this:

int foo (unsigned long a, unsigned long long g) {
  return a >= g;
}

To:

foo:
        movl 8(%esp), %eax
        cmpl %eax, 4(%esp)
        setae %al
        cmpl $0, 12(%esp)
        sete %cl
        andb %al, %cl
        movzbl %cl, %eax
        ret

instead of:

foo:
        movl 8(%esp), %eax
        cmpl %eax, 4(%esp)
        setae %al
        movzbw %al, %cx
        movl 12(%esp), %edx
        cmpl $0, %edx
        sete %al
        movzbw %al, %ax
        cmpl $0, %edx
        cmove %cx, %ax
        movzbl %al, %eax
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21244 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-12 02:54:39 +00:00
Chris Lattner
3b2c1d95a2 canonicalize x <u 1 -> x == 0. On this testcase: 
unsigned long long g;
unsigned long foo (unsigned long a) {
  return (a >= g) ? 1 : 0;
}

It changes the ppc code from:

_foo:
.LBB_foo_0:     ; entry
        mflr r11
        stw r11, 8(r1)
        bl "L00000$pb"
"L00000$pb":
        mflr r2
        addis r2, r2, ha16(L_g$non_lazy_ptr-"L00000$pb")
        lwz r2, lo16(L_g$non_lazy_ptr-"L00000$pb")(r2)
        lwz r4, 0(r2)
        lwz r2, 4(r2)
        cmplw cr0, r3, r2
        li r2, 1
        li r3, 0
        bge .LBB_foo_2  ; entry
.LBB_foo_1:     ; entry
        or r2, r3, r3
.LBB_foo_2:     ; entry
        cmplwi cr0, r4, 1
        li r3, 1
        li r5, 0
        blt .LBB_foo_4  ; entry
.LBB_foo_3:     ; entry
        or r3, r5, r5
.LBB_foo_4:     ; entry
        cmpwi cr0, r4, 0
        beq .LBB_foo_6  ; entry
.LBB_foo_5:     ; entry
        or r2, r3, r3
.LBB_foo_6:     ; entry
        rlwinm r3, r2, 0, 31, 31
        lwz r11, 8(r1)
        mtlr r11
        blr


to:

_foo:
.LBB_foo_0:     ; entry
        mflr r11
        stw r11, 8(r1)
        bl "L00000$pb"
"L00000$pb":
        mflr r2
        addis r2, r2, ha16(L_g$non_lazy_ptr-"L00000$pb")
        lwz r2, lo16(L_g$non_lazy_ptr-"L00000$pb")(r2)
        lwz r4, 0(r2)
        lwz r2, 4(r2)
        cmplw cr0, r3, r2
        li r2, 1
        li r3, 0
        bge .LBB_foo_2  ; entry
.LBB_foo_1:     ; entry
        or r2, r3, r3
.LBB_foo_2:     ; entry
        cntlzw r3, r4
        srwi r3, r3, 5
        cmpwi cr0, r4, 0
        beq .LBB_foo_4  ; entry
.LBB_foo_3:     ; entry
        or r2, r3, r3
.LBB_foo_4:     ; entry
        rlwinm r3, r2, 0, 31, 31
        lwz r11, 8(r1)
        mtlr r11
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21241 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-12 00:28:49 +00:00
Chris Lattner
2bb6f41282 Don't bother sign/zext_inreg'ing the result of an and operation if we know 
the result does change as a result of the extend.

This improves codegen for Alpha on this testcase:

int %a(ushort* %i) {
        %tmp.1 = load ushort* %i
        %tmp.2 = cast ushort %tmp.1 to int
        %tmp.4 = and int %tmp.2, 1
        ret int %tmp.4
}

Generating:

a:
        ldgp $29, 0($27)
        ldwu $0,0($16)
        and $0,1,$0
        ret $31,($26),1

instead of:

a:
        ldgp $29, 0($27)
        ldwu $0,0($16)
        and $0,1,$0
        addl $0,0,$0
        ret $31,($26),1

btw, alpha really should switch to livein/outs for args :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21213 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-10 23:37:16 +00:00
Chris Lattner
45278e37eb Fold zext_inreg(zextload), likewise for sext's 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21204 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-10 04:33:08 +00:00
Chris Lattner
edeecfcbd5 add a simple xform 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21203 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-10 04:04:49 +00:00
Chris Lattner
dea29e25c3 Fix a thinko. If the operand is promoted, pass the promoted value into 
the new zero extend, not the original operand.  This fixes cast bool -> long
on ppc.

Add an unrelated fixme


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21196 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-10 01:13:15 +00:00
Chris Lattner
a2daa8c78d add a little peephole optimization. This allows us to codegen: 
int a(short i) {
        return i & 1;
}

as

_a:
        andi. r3, r3, 1
        blr

instead of:

_a:
        rlwinm r2, r3, 0, 16, 31
        andi. r3, r2, 1
        blr

on ppc.  It should also help the other risc targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21189 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 21:43:54 +00:00
Chris Lattner
59723e9698 recognize some patterns as fabs operations, so that fabs at the source level 
is deconstructed then reconstructed here.  This catches 19 fabs's in 177.mesa
9 in 168.wupwise, 5 in 171.swim, 3 in 172.mgrid, and 14 in 173.applu out of
specfp2000.

This allows the X86 code generator to make MUCH better code than before for
each of these and saves one instr on ppc.

This depends on the previous CFE patch to expose these correctly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21171 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 05:15:53 +00:00
Chris Lattner
ef847df087 print and fold BRCONDTWOWAY correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21165 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 03:27:28 +00:00
Chris Lattner
485df9b84b canonicalize a bunch of operations involving fneg 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21160 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 03:02:46 +00:00
Chris Lattner
5a6bace3ab If a target zero or sign extends the result of its setcc, allow folding of 
this into sign/zero extension instructions later.

On PPC, for example, this testcase:

%G = external global sbyte
implementation
void %test(int %X, int %Y) {
  %C = setlt int %X, %Y
  %D = cast bool %C to sbyte
  store sbyte %D, sbyte* %G
  ret void
}

Now codegens to:

        cmpw cr0, r3, r4
        li r3, 1
        li r4, 0
        blt .LBB_test_2 ;
.LBB_test_1:    ;
        or r3, r4, r4
.LBB_test_2:    ;
        addis r2, r2, ha16(L_G$non_lazy_ptr-"L00000$pb")
        lwz r2, lo16(L_G$non_lazy_ptr-"L00000$pb")(r2)
        stb r3, 0(r2)

instead of:

        cmpw cr0, r3, r4
        li r3, 1
        li r4, 0
        blt .LBB_test_2 ;
.LBB_test_1:    ;
        or r3, r4, r4
.LBB_test_2:    ;
***     rlwinm r3, r3, 0, 31, 31
        addis r2, r2, ha16(L_G$non_lazy_ptr-"L00000$pb")
        lwz r2, lo16(L_G$non_lazy_ptr-"L00000$pb")(r2)
        stb r3, 0(r2)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21148 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 19:43:53 +00:00
Chris Lattner
2467392c59 Remove somethign I had for testing 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21144 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 18:58:54 +00:00
Chris Lattner
67255a1d17 This patch does two things. First, it canonicalizes 'X >= C' -> 'X > C-1' 
(likewise for <= >=u >=u).

Second, it implements a special case hack to turn 'X gtu SINTMAX' -> 'X lt 0'

On powerpc, for example, this changes this:

        lis r2, 32767
        ori r2, r2, 65535
        cmplw cr0, r3, r2
        bgt .LBB_test_2

into:

        cmpwi cr0, r3, 0
        blt .LBB_test_2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21142 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 18:14:58 +00:00
Chris Lattner
8e8bd656b3 Fix a really scary bug that Nate found where we weren't deleting the right 
elements auto of the autoCSE maps.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21128 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 00:30:13 +00:00
Nate Begeman
1867054643 Add MULHU and MULHS nodes for the high part of an (un)signed 32x32=64b 
multiply.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21102 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-05 22:36:56 +00:00
Chris Lattner
ff9fd0a99c print fneg/fabs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21008 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 04:58:41 +00:00
Chris Lattner
5b359c6c4f fix some bugs in the implementation of SHL_PARTS and friends. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21004 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 04:00:59 +00:00
Chris Lattner
41be951a47 Print some new nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21001 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 03:30:42 +00:00
Nate Begeman
fc1b1dad88 Add ISD::UNDEF node 
Teach the SelectionDAG code how to expand and promote it
Have PPC32 LowerCallTo generate ISD::UNDEF for int arg regs used up by fp
  arguments, but not shadowing their value.  This allows us to do the right
  thing with both fixed and vararg floating point arguments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20988 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-01 22:34:39 +00:00
Andrew Lenharth
95762124a1 PCMarker support for DAG and Alpha 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20965 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-31 21:24:06 +00:00
Chris Lattner
ee639f1760 Fix a bug where we would incorrectly do a sign ext instead of a zero ext 
because we were checking the wrong thing.  Thanks to andrew for pointing
this out!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20554 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-10 20:55:51 +00:00
Chris Lattner
14723c264d constant fold FP_ROUND_INREG, ZERO_EXTEND_INREG, and SIGN_EXTEND_INREG 
This allows the alpha backend to compile:

bool %test(uint %P) {
        %c = seteq uint %P, 0
        ret bool %c
}

into:

test:
        ldgp $29, 0($27)
        ZAP $16,240,$0
        CMPEQ $0,0,$0
        AND $0,1,$0
        ret $31,($26),1

instead of:

test:
        ldgp $29, 0($27)
        ZAP $16,240,$0
        ldiq $1,0
        ZAP $1,240,$1
        CMPEQ $0,$1,$0
        AND $0,1,$0
        ret $31,($26),1

... and fixes PR534.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20534 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-09 18:37:12 +00:00
Chris Lattner
d8658616cf Don't rely on doubles comparing identical to each other, which doesn't work 
for 0.0 and -0.0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20230 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-17 20:17:32 +00:00
Chris Lattner
b48da39536 Remove the 3 HACK HACK HACKs I put in before, fixing them properly with 
the new TLI that is available.

Implement support for handling out of range shifts.  This allows us to
compile this code (a 64-bit rotate):

unsigned long long f3(unsigned long long x) {
  return (x << 32) | (x >> (64-32));
}

into this:

f3:
        mov %EDX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%ESP + 8]
        ret

GCC produces this:

$ gcc t.c -masm=intel -O3 -S -o - -fomit-frame-pointer
..
f3:
        push    %ebx
        mov     %ebx, DWORD PTR [%esp+12]
        mov     %ecx, DWORD PTR [%esp+8]
        mov     %eax, %ebx
        mov     %edx, %ecx
        pop     %ebx
        ret

The Simple ISEL produces (eww gross):

f3:
        sub %ESP, 4
        mov DWORD PTR [%ESP], %ESI
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %ECX, DWORD PTR [%ESP + 12]
        mov %EAX, 0
        mov %ESI, 0
        or %EAX, %ECX
        or %EDX, %ESI
        mov %ESI, DWORD PTR [%ESP]
        add %ESP, 4
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19780 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-23 04:39:44 +00:00
Chris Lattner
7cd50cf286 More bugfixes for IA64 shifts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19739 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 00:33:03 +00:00
Chris Lattner
a7306db5f7 Add a nasty hack to fix Alpha/IA64 multiplies by a power of two. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19737 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 00:20:42 +00:00
Chris Lattner
9bb86f46e1 Remove unneeded line. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19736 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 23:43:12 +00:00
Chris Lattner
1e7ceaf0a0 test commit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19735 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 23:38:56 +00:00
Chris Lattner
a93ec3ebfb Unary token factor nodes are unneeded. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19727 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 18:01:22 +00:00
Chris Lattner
17eee18f40 implement add_parts/sub_parts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19714 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 18:50:55 +00:00
Chris Lattner
39908e0ce0 Know some identities about tokenfactor nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19699 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 18:01:40 +00:00
Chris Lattner
88218ef706 Know some simple identities. This improves codegen for (1LL << N). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19698 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 17:29:49 +00:00
Chris Lattner
4a9b4f1943 Keep track of the retval type as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19670 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:26:36 +00:00
Chris Lattner
f30b73b1c6 Allow setcc operations to have nonbool types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19656 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:52:03 +00:00
Chris Lattner
6e4e7652d8 Fix the completely broken FP constant folds for setcc's. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19651 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:11:55 +00:00
Chris Lattner
068a81e9fc Refactor code into a new method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19635 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 17:15:02 +00:00
Chris Lattner
7636512f59 Add assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19596 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:23:22 +00:00
Chris Lattner
950aa3ca2c Eliminate unneeded extensions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19577 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:17:20 +00:00
Chris Lattner
8a389bb376 Print extra type for nodes with extra type info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19575 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 21:11:37 +00:00
Chris Lattner
4ea6924444 Common code factored out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19572 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 07:14:32 +00:00
Chris Lattner
859157daee Add new SIGN_EXTEND_INREG, ZERO_EXTEND_INREG, and FP_ROUND_INREG operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19568 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 06:17:04 +00:00
Chris Lattner
69a52155d2 Adjust to CopyFromReg changes, implement deletion of truncating/extending 
stores/loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19562 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 22:38:01 +00:00
Chris Lattner
2ee743ff9b Start implementing truncating stores and extending loads. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19559 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 22:08:15 +00:00
Chris Lattner
18c2f13e0f Add new ImplicitDef node, rename CopyRegSDNode class to RegSDNode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19535 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 20:50:02 +00:00
Chris Lattner
282c5cae89 Print new node. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19526 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 17:59:10 +00:00
Chris Lattner
2f0ca79a75 Do not fold (zero_ext (sign_ext V)) -> (sign_ext V), they are not the same. 
This fixes llvm-test/SingleSource/Regression/C/casts.c


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19519 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:51:15 +00:00
Chris Lattner
5c88456227 New method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19517 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:37:47 +00:00
Chris Lattner
4c633e82f6 Print new operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19464 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 05:57:01 +00:00
Chris Lattner
a8d9cc8705 shift X, 0 -> X 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19453 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 04:25:13 +00:00
Chris Lattner
d75f19fa42 Split out SDNode::getOperationName into its own method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19443 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:25:25 +00:00
Chris Lattner
68dc310942 Implement a couple of more simplifications. This lets us codegen: 
int test2(int * P, int* Q, int A, int B) {
        return P+A == P;
}

into:

test2:
        movl 4(%esp), %eax
        movl 12(%esp), %eax
        shll $2, %eax
        cmpl $0, %eax
        sete %al
        movzbl %al, %eax
        ret

instead of:

test2:
        movl 4(%esp), %eax
        movl 12(%esp), %ecx
        leal (%eax,%ecx,4), %ecx
        cmpl %eax, %ecx
        sete %al
        movzbl %al, %eax
        ret

ICC is producing worse code:

test2:
        movl      4(%esp), %eax                                 #8.5
        movl      12(%esp), %edx                                #8.5
        lea       (%edx,%edx), %ecx                             #9.9
        addl      %ecx, %ecx                                    #9.9
        addl      %eax, %ecx                                    #9.9
        cmpl      %eax, %ecx                                    #9.16
        movl      $0, %eax                                      #9.16
        sete      %al                                           #9.16
        ret                                                     #9.16

as is GCC (looks like our old code):

test2:
        movl    4(%esp), %edx
        movl    12(%esp), %eax
        leal    (%edx,%eax,4), %ecx
        cmpl    %edx, %ecx
        sete    %al
        movzbl  %al, %eax
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19430 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 02:03:02 +00:00
Chris Lattner
87ae6ae41c Fix incorrect constant folds, fixing Stepanov after the SHR patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19429 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 01:16:03 +00:00
Chris Lattner
8136d1f8cb Constant fold shifts, turning this loop: 
.LBB_Z5test0PdS__3:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        movl $16000, %ecx
        sarl $3, %ecx
        cmpl %eax, %ecx
        fstpl 16(%esp)
        #FP_REG_KILL
        jg .LBB_Z5test0PdS__3   # no_exit.1

into:

.LBB_Z5test0PdS__3:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        cmpl $2000, %eax
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__3   # no_exit.1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19427 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 00:07:15 +00:00
Chris Lattner
5cdcc58d51 Add some folds for == and != comparisons. This allows us to 
codegen this loop in stepanov:

no_exit.i:              ; preds = %entry, %no_exit.i, %then.i, %_Z5checkd.exit
        %i.0.0 = phi int [ 0, %entry ], [ %i.0.0, %no_exit.i ], [ %inc.0, %_Z5checkd.exit ], [ %inc.012, %then.i ]              ; <int> [#uses=3]
        %indvar = phi uint [ %indvar.next, %no_exit.i ], [ 0, %entry ], [ 0, %then.i ], [ 0, %_Z5checkd.exit ]          ; <uint> [#uses=3]
        %result_addr.i.0 = phi double [ %tmp.4.i.i, %no_exit.i ], [ 0.000000e+00, %entry ], [ 0.000000e+00, %then.i ], [ 0.000000e+00, %_Z5checkd.exit ]          ; <double> [#uses=1]
        %first_addr.0.i.2.rec = cast uint %indvar to int                ; <int> [#uses=1]
        %first_addr.0.i.2 = getelementptr [2000 x double]* %data, int 0, uint %indvar           ; <double*> [#uses=1]
        %inc.i.rec = add int %first_addr.0.i.2.rec, 1           ; <int> [#uses=1]
        %inc.i = getelementptr [2000 x double]* %data, int 0, int %inc.i.rec            ; <double*> [#uses=1]
        %tmp.3.i.i = load double* %first_addr.0.i.2             ; <double> [#uses=1]
        %tmp.4.i.i = add double %result_addr.i.0, %tmp.3.i.i            ; <double> [#uses=2]
        %tmp.2.i = seteq double* %inc.i, getelementptr ([2000 x double]* %data, int 0, int 2000)                ; <bool> [#uses=1]
        %indvar.next = add uint %indvar, 1              ; <uint> [#uses=1]
        br bool %tmp.2.i, label %_Z10accumulateIPddET0_T_S2_S1_.exit, label %no_exit.i

To this:

.LBB_Z4testIPddEvT_S1_T0__1:    # no_exit.i
        fldl data(,%eax,8)
        fldl 16(%esp)
        faddp %st(1)
        fstpl 16(%esp)
        incl %eax
        movl %eax, %ecx
        shll $3, %ecx
        cmpl $16000, %ecx
        #FP_REG_KILL
        jne .LBB_Z4testIPddEvT_S1_T0__1 # no_exit.i

instead of this:

.LBB_Z4testIPddEvT_S1_T0__1:    # no_exit.i
        fldl data(,%eax,8)
        fldl 16(%esp)
        faddp %st(1)
        fstpl 16(%esp)
        incl %eax
        leal data(,%eax,8), %ecx
        leal data+16000, %edx
        cmpl %edx, %ecx
        #FP_REG_KILL
        jne .LBB_Z4testIPddEvT_S1_T0__1 # no_exit.i


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19425 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:52:51 +00:00
Jeff Cohen
fd161e964a Fix VC++ compilation error 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19423 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:41:56 +00:00
Chris Lattner
ea946cdb1b Print the DAG out more like a DAG in nested format. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19422 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:38:33 +00:00
Chris Lattner
49d24716a4 Print out nodes sorted by their address to make it easier to find them in a list. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19421 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:26:36 +00:00
Chris Lattner
abd2182875 Add a simple transformation. This allows us to compile one of the inner 
loops in stepanov to this:

.LBB_Z5test0PdS__2:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        cmpl $2000, %eax
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__2

instead of this:

.LBB_Z5test0PdS__2:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        movl $data, %ecx
        movl %ecx, %edx
        addl $16000, %edx
        subl %ecx, %edx
        movl %edx, %ecx
        sarl $2, %ecx
        shrl $29, %ecx
        addl %ecx, %edx
        sarl $3, %edx
        cmpl %edx, %eax
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__2

The old instruction selector produced:

.LBB_Z5test0PdS__2:     # no_exit.1
        fldl 24(%esp)
        faddl data(,%eax,8)
        fstl 24(%esp)
        movl %eax, %ecx
        incl %ecx
        incl %eax
        leal data+16000, %edx
        movl $data, %edi
        subl %edi, %edx
        movl %edx, %edi
        sarl $2, %edi
        shrl $29, %edi
        addl %edi, %edx
        sarl $3, %edx
        cmpl %edx, %ecx
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__2   # no_exit.1

Which is even worse!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19419 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:09:57 +00:00
Chris Lattner
ae0aacb833 Add support for FP->INT conversions and back. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19369 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 08:08:56 +00:00
Chris Lattner
623f70dd4c 1ULL << 64 is undefined, don't do it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19365 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 06:24:30 +00:00
Chris Lattner
7c68ec6b70 Fix a pointer invalidation problem. This fixes Generic/badarg6.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19361 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 23:32:00 +00:00
Chris Lattner
5351e9b172 Fold conditional branches on constants away. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19360 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 22:49:57 +00:00
Chris Lattner
4287d5e355 Fix a thinko in the reassociation code, fixing Generic/badlive.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19359 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 22:44:09 +00:00
Chris Lattner
fd8c39b773 Simplify: truncate ({zero|sign}_extend (X)) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19353 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:56:24 +00:00
Chris Lattner
0e12e6e041 Implement RemoveDeadNodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19345 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:09:16 +00:00
Chris Lattner
c3aae25116 Complete rewrite of the SelectionDAG class. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19327 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 07:46:32 +00:00