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Author SHA1 Message Date
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
Chris Lattner
d67b3a8bf7 dbg.stoppoint returns a value, don't forget to init it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24583 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-03 18:50:48 +00:00
Andrew Lenharth
cde0f5cfe7 bah, must generate all results 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24574 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-02 06:08:08 +00:00
Andrew Lenharth
49c709f891 cycle counter fix 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24573 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-02 04:56:24 +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
9ad17c9c9a Promote line and column number information for our friendly 64-bit targets. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24568 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-01 18:21:35 +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
Nate Begeman
6510b22cec Support multiple ValueTypes per RegisterClass, needed for upcoming vector 
work.  This change has no effect on generated code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24563 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-01 04:51:06 +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
Andrew Lenharth
ae35575957 At long last, you can say that f32 isn't supported for setcc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24537 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 17:12:26 +00:00
Nate Begeman
f43a3ca26d First chunk of actually generating vector code for packed types. These 
changes allow us to generate the following code:

_foo:
        li r2, 0
        lvx v0, r2, r3
        vaddfp v0, v0, v0
        stvx v0, r2, r3
        blr

for this llvm:

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
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24534 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 08:22:07 +00:00
Andrew Lenharth
5b5b8c2755 add support for custom lowering SINT_TO_FP 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24531 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 06:43:03 +00:00
Reid Spencer
6ff7240a5c Fix a problem with llvm-ranlib that (on some platforms) caused the archive 
file to become corrupted due to interactions between mmap'd memory segments
and file descriptors closing. The problem is completely avoiding by using
a third temporary file.

Patch provided by Evan Jones


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24527 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-30 05:21:10 +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
6a648614e8 Add the majority of the vector machien value types we expect to support, 
and make a few changes to the legalization machinery to support more than
16 types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24511 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-29 05:45:29 +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
Nate Begeman
4ef3b817fe Rather than attempting to legalize 1 x float, make sure the SD ISel never 
generates it.  Make MVT::Vector expand-only, and remove the code in
Legalize that attempts to legalize it.

The plan for supporting N x Type is to continually epxand it in ExpandOp
until it gets down to 2 x Type, where it will be scalarized into a pair of
scalars.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24482 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-22 01:29:36 +00:00
Chris Lattner
308575be66 Legalize MERGE_VALUES, expand READCYCLECOUNTER correctly, so it doesn't 
break control dependence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24437 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-20 22:56:56 +00:00
Andrew Lenharth
f70e30b41d The first patch of X86 support for read cycle counter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24429 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-20 21:32:07 +00:00
Chris Lattner
6bf234c4a8 more progress towards bug 291 being finished. Patch by Owen Anderson, 
HAVE_GV case fixed up by me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24428 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-20 03:45:52 +00:00
Chris Lattner
b67eb9131c Unbreak codegen of bools. This should fix the llc/jit/llc-beta failures 
from last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24427 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-19 18:40:42 +00:00
Chris Lattner
3aa2c74e19 Improve Selection DAG printer portability. Patch by Owen Anderson! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24425 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-19 07:44:09 +00:00
Chris Lattner
44fa764355 Teach the graph viewer to handle register operands that are zero. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24421 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-19 06:58:46 +00:00
Chris Lattner
b89175feff Silence a bogus warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24420 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-19 05:51:46 +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
Nate Begeman
e21ea61588 Split out the shift code from visitBinary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24412 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-18 07:42:56 +00:00
Chris Lattner
0c8fbe33a4 Allow targets to custom legalize leaf nodes like GlobalAddress. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24387 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-17 06:41:44 +00:00
Chris Lattner
b9debbf54c Teach legalize about targetglobaladdress 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24385 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-17 05:52:24 +00:00
Chris Lattner
b1a5a5c4c0 when debugging lower dbg intrinsics to calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24377 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-16 07:22:30 +00:00
Jeff Cohen
06d9b4ab24 Fix operator precedence bug caught by VC++. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24318 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-12 00:59:01 +00:00
Andrew Lenharth
8b91c77385 added a chain output 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24306 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-11 22:48:54 +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
c9ea6fde30 Refactor intrinsic lowering stuff out of visitCall 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24261 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-09 19:44:01 +00:00
Chris Lattner
040c11c24e Handle the trivial (but common) two-op case more efficiently 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24259 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-09 18:48:57 +00:00
Chris Lattner
6b2d69655a Fix CodeGen/X86/shift-folding.ll:test3 on X86 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24256 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-09 16:50:40 +00:00
Chris Lattner
7436b57de3 Avoid creating a token factor node in trivially redundant cases. This 
eliminates almost one node per block in common cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24254 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-09 05:03:03 +00:00