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94683777ae
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660 Commits

Author SHA1 Message Date
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
232348d66f Fix a pasto 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24973 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-23 00:52:30 +00:00
Chris Lattner
ed7b5babfb fix a thinko in the bit_convert handling code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24972 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-23 00:50:25 +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
Chris Lattner
1ccf26a639 The 81st column doesn't like code in it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24943 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-22 05:23:45 +00:00
Evan Cheng
ff9be11da2 Lefted out TargetLowering:: 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24922 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-21 23:14:54 +00:00
Evan Cheng
3a03ebb377 * Fix a GlobalAddress lowering bug. 
* Teach DAG combiner about X86ISD::SETCC by adding a TargetLowering hook.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24921 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-21 23:05:39 +00:00
Jim Laskey
e81aecbae6 Disengage DEBUG_LOC from non-PPC targets. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24919 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-21 20:51:37 +00:00
Evan Cheng
d5781fca4f * Added support for X86 RET with an additional operand to specify number of 
bytes to pop off stack.
* Added support for X86 SETCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24917 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-21 20:21:51 +00:00
Chris Lattner
f9dee6a047 make sure to relegalize all cases 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24911 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-21 19:40:42 +00:00
Chris Lattner
9797c5cc3e enable the gep isel opt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24910 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-21 19:36:36 +00:00
Chris Lattner
8339736334 fix a bug I introduced that broke recursive expansion of nodes (e.g. scalarizing vectors) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24905 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-21 18:02:52 +00:00
Chris Lattner
3b841e9f52 Lower ConstantAggregateZero into zeros 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24890 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-21 02:43:26 +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
Chris Lattner
69a889eb35 Fix a nasty latent bug in the legalizer that was triggered by my patch 
last night, breaking crafty and twolf.  Make sure that the newly found
legal nodes are themselves not re-legalized until the next iteration.

Also, since this functionality exists now, we can reduce number of legalizer
iterations by depending on this behavior instead of having to misuse 'do
another iteration' to get the same effect.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24875 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-20 00:53:54 +00:00
Evan Cheng
898101c15f X86 conditional branch support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24870 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-19 23:12:38 +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
d845582d4a Amend comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24861 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-19 16:32:26 +00:00
Jim Laskey
de48ee28a3 Create a strong dependency for loads following stores. This will leave a 
latency period between the two.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24860 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-19 16:30:13 +00:00
Chris Lattner
e773673d8e Make sure to relegalize new nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24843 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-18 23:54:29 +00:00
Jeff Cohen
18840db533 Keep VC++ happy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24835 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-18 22:20:05 +00:00
Chris Lattner
f1a47c3371 More corrections for flagged copyto/from reg 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24828 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-18 15:36:21 +00:00
Chris Lattner
7310fb11f2 legalize copytoreg and copyfromreg nodes that have flag operands correctly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24826 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-18 15:27:43 +00:00
Jim Laskey
bd2b621486 Fix a bug Sabre was having where the DAG root was a group. The group dominator 
needed to be added to the ordering list, not the first member of the group.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24816 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-18 04:40:52 +00:00
Jim Laskey
9022ed955a Groups were not emitted if the dominator node and the node in the ordering list 
were not the same node.  Ultimately the test was bogus.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24815 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-18 03:59:21 +00:00
Chris Lattner
a5282d8df2 Simplify code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24806 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-18 01:03:46 +00:00
Chris Lattner
181b7a382f allow custom expansion of BR_CC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24804 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-17 23:46:46 +00:00
Evan Cheng
7df96d6672 X86 lowers SELECT to a cmp / test followed by a conditional move. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24754 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-17 01:21:05 +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
Chris Lattner
d0f6d18aa8 Don't create SEXTLOAD/ZEXTLOAD instructions that the target doesn't support 
if after legalize.  This fixes IA64 failures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24725 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-15 19:02:38 +00:00
Chris Lattner
d4771840fd When folding loads into ops, immediately replace uses of the op with the 
load.  This reduces number of worklist iterations and avoid missing optimizations
depending on folding of things into sext_inreg nodes (which aren't supported by
all targets).
Tested by Regression/CodeGen/X86/extend.ll:test2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24712 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-14 19:25:30 +00:00
Chris Lattner
ad25d4e2df Fix the (zext (zextload)) case to trigger, similarly for sign extends. 
Allow (zext (truncate)) to apply after legalize if the target supports
AND (which all do).

This compiles
short %foo() {
        %tmp.0 = load ubyte* %X         ; <ubyte> [#uses=1]
        %tmp.3 = cast ubyte %tmp.0 to short             ; <short> [#uses=1]
        ret short %tmp.3
}

to:
_foo:
        movzbl _X, %eax
        ret

instead of:

_foo:
        movzbl _X, %eax
        movzbl %al, %eax
        ret

thanks to Evan for pointing this out.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24709 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-14 19:05:06 +00:00
Chris Lattner
00cb95c9be Fix a miscompilation in crafty due to a recent patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24706 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-14 07:58:38 +00:00
Evan Cheng
110dec2000 Fold (zext (load x) to (zextload x). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24702 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-14 02:19:23 +00:00
Chris Lattner
86cb643801 Don't lump the filename and working dir together 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24697 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-13 17:40:33 +00:00
Nate Begeman
d7d746f603 Lowering constant pool entries on ppc exposed a bug in the recently added 
ConstantVec legalizing code, which would return constantpool nodes that
were not of the target's pointer type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24691 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-13 03:03:23 +00:00
Chris Lattner
ac22c83e68 Accept and ignore prefetches for now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24678 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-12 22:51:16 +00:00
Chris Lattner
58f7963b8b Fix CodeGen/Generic/2005-12-12-ExpandSextInreg.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24677 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-12 22:27:43 +00:00
Chris Lattner
3802c2552f Minor tweak to get isel opt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24663 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-11 09:05:13 +00:00
Nate Begeman
28a6b02626 Add support for TargetConstantPool nodes to the dag isel emitter, and use 
them in the PPC backend, to simplify some logic out of Select and
SelectAddr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24657 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-10 02:36:00 +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
Chris Lattner
5e3c5b4e13 Teach legalize how to promote sext_inreg to fix a problem Andrew pointed 
out to me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24644 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-09 17:32:47 +00:00
Chris Lattner
c78b0b740b improve code insertion in two ways: 
1. Only forward subst offsets into loads and stores, not into arbitrary
   things, where it will likely become a load.
2. If the source is a cast from pointer, forward subst the cast as well,
   allowing us to fold the cast away (improving cases when the cast is
   from an alloca or global).

This hasn't been fully tested, but does appear to further reduce register
pressure and improve code.  Lets let the testers grind on it a bit. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24640 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-08 08:00:12 +00:00
Nate Begeman
cc827e60b6 Fix a crash where ConstantVec nodes were being generated with the wrong 
type when the target did not support them.  Also teach Legalize how to
expand ConstantVecs.

This allows us to generate

_test:
        lwz r2, 12(r3)
        lwz r4, 8(r3)
        lwz r5, 4(r3)
        lwz r6, 0(r3)
        addi r2, r2, 4
        addi r4, r4, 3
        addi r5, r5, 2
        addi r6, r6, 1
        stw r2, 12(r3)
        stw r4, 8(r3)
        stw r5, 4(r3)
        stw r6, 0(r3)
        blr

For:

void %test(%v4i *%P) {
        %T = load %v4i* %P
        %S = add %v4i %T, <int 1, int 2, int 3, int 4>
        store %v4i %S, %v4i * %P
        ret void
}

On PowerPC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24633 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-07 19:48:11 +00:00
Chris Lattner
cc2210b4fa Only transform (sext (truncate x)) -> (sextinreg x) if before legalize or 
if the target supports the resultant sextinreg


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24632 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-07 18:02:05 +00:00
Chris Lattner
b14ab8a10d Teach the dag combiner to turn a truncate/sign_extend pair into a sextinreg 
when the types match up.  This allows the X86 backend to compile:

sbyte %toggle_value(sbyte* %tmp.1) {
        %tmp.2 = load sbyte* %tmp.1
        ret sbyte %tmp.2
}

to this:

_toggle_value:
        mov %EAX, DWORD PTR [%ESP + 4]
        movsx %EAX, BYTE PTR [%EAX]
        ret

instead of this:

_toggle_value:
        mov %EAX, DWORD PTR [%ESP + 4]
        movsx %EAX, BYTE PTR [%EAX]
        movsx %EAX, %AL
        ret

noticed in Shootout/objinst.

-Chris


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24630 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-07 07:11:03 +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
c88d8e944d Fix the #1 code quality problem that I have seen on X86 (and it also affects 
PPC and other targets).  In a particular, consider code like this:

struct Vector3 { double x, y, z; };
struct Matrix3 { Vector3 a, b, c; };
double dot(Vector3 &a, Vector3 &b) {
   return a.x * b.x  +  a.y * b.y  +  a.z * b.z;
}
Vector3 mul(Vector3 &a, Matrix3 &b) {
   Vector3 r;
   r.x = dot( a, b.a );
   r.y = dot( a, b.b );
   r.z = dot( a, b.c );
   return r;
}
void transform(Matrix3 &m, Vector3 *x, int n) {
   for (int i = 0; i < n; i++)
      x[i] = mul( x[i], m );
}

we compile transform to a loop with all of the GEP instructions for indexing
into 'm' pulled out of the loop (9 of them).  Because isel occurs a bb at a time
we are unable to fold the constant index into the loads in the loop, leading to
PPC code that looks like this:

LBB3_1: ; no_exit.preheader
        li r2, 0
        addi r6, r3, 64        ;; 9 values live across the loop body!
        addi r7, r3, 56
        addi r8, r3, 48
        addi r9, r3, 40
        addi r10, r3, 32
        addi r11, r3, 24
        addi r12, r3, 16
        addi r30, r3, 8
LBB3_2: ; no_exit
        lfd f0, 0(r30)
        lfd f1, 8(r4)
        fmul f0, f1, f0
        lfd f2, 0(r3)        ;; no constant indices folded into the loads!
        lfd f3, 0(r4)
        lfd f4, 0(r10)
        lfd f5, 0(r6)
        lfd f6, 0(r7)
        lfd f7, 0(r8)
        lfd f8, 0(r9)
        lfd f9, 0(r11)
        lfd f10, 0(r12)
        lfd f11, 16(r4)
        fmadd f0, f3, f2, f0
        fmul f2, f1, f4
        fmadd f0, f11, f10, f0
        fmadd f2, f3, f9, f2
        fmul f1, f1, f6
        stfd f0, 0(r4)
        fmadd f0, f11, f8, f2
        fmadd f1, f3, f7, f1
        stfd f0, 8(r4)
        fmadd f0, f11, f5, f1
        addi r29, r4, 24
        stfd f0, 16(r4)
        addi r2, r2, 1
        cmpw cr0, r2, r5
        or r4, r29, r29
        bne cr0, LBB3_2 ; no_exit

uh, yuck.  With this patch, we now sink the constant offsets into the loop, producing
this code:

LBB3_1: ; no_exit.preheader
        li r2, 0
LBB3_2: ; no_exit
        lfd f0, 8(r3)
        lfd f1, 8(r4)
        fmul f0, f1, f0
        lfd f2, 0(r3)
        lfd f3, 0(r4)
        lfd f4, 32(r3)       ;; much nicer.
        lfd f5, 64(r3)
        lfd f6, 56(r3)
        lfd f7, 48(r3)
        lfd f8, 40(r3)
        lfd f9, 24(r3)
        lfd f10, 16(r3)
        lfd f11, 16(r4)
        fmadd f0, f3, f2, f0
        fmul f2, f1, f4
        fmadd f0, f11, f10, f0
        fmadd f2, f3, f9, f2
        fmul f1, f1, f6
        stfd f0, 0(r4)
        fmadd f0, f11, f8, f2
        fmadd f1, f3, f7, f1
        stfd f0, 8(r4)
        fmadd f0, f11, f5, f1
        addi r6, r4, 24
        stfd f0, 16(r4)
        addi r2, r2, 1
        cmpw cr0, r2, r5
        or r4, r6, r6
        bne cr0, LBB3_2 ; no_exit

This is much nicer as it reduces register pressure in the loop a lot.  On X86,
this takes the function from having 9 spilled registers to 2.  This should help
some spec programs on X86 (gzip?)

This is currently only enabled with -enable-gep-isel-opt to allow perf testing
tonight.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24606 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-05 07:10:48 +00:00