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Author SHA1 Message Date
Chris Lattner
941d6d205a remove misleading comment 
llvm-svn: 30585
 2006-09-23 06:09:45 +00:00
Chris Lattner
bf0b610dfa add method, correct comment 
llvm-svn: 30584
 2006-09-23 04:03:45 +00:00
Evan Cheng
02e193e2ff Delete dead code; fix 80 col violations. 
llvm-svn: 30583
 2006-09-22 21:43:59 +00:00
Rafael Espindola
9cfd72a3d1 add a note 
llvm-svn: 30581
 2006-09-22 11:36:17 +00:00
Bill Wendling
a609cf48a3 Use "%llvmgxx" instead of "llvm-g++". 
llvm-svn: 30580
 2006-09-22 07:09:01 +00:00
Nate Begeman
29f99e606d Testcase for better rotate left and mask support 
llvm-svn: 30579
 2006-09-22 05:49:57 +00:00
Bill Wendling
e1c45087bd Regression testcase for PR855. 
llvm-svn: 30578
 2006-09-22 05:34:25 +00:00
Nate Begeman
7bcce1a7f6 Fold AND and ROTL more often 
llvm-svn: 30577
 2006-09-22 05:01:56 +00:00
Devang Patel
b34118f8bd remove extra white spaces. 
llvm-svn: 30576
 2006-09-22 01:07:57 +00:00
Devang Patel
8248ba3afc Use iterative algorith to assign DFS number. This reduces 
call stack depth.

llvm-svn: 30575
 2006-09-22 01:05:33 +00:00
Chris Lattner
86f1992481 don't allow 'imm' or specific imms, like '1' on the LHS of a binop. 
This shrinks X86GenDAGISel by ~330 lines.

llvm-svn: 30574
 2006-09-21 20:46:13 +00:00
Evan Cheng
ce6a660148 Make it work for DAG combine of multi-value nodes. 
llvm-svn: 30573
 2006-09-21 19:04:05 +00:00
Chris Lattner
28d7124afb Fit to 80 columns. 
llvm-svn: 30572
 2006-09-21 18:28:27 +00:00
Jim Laskey
231343018b core corrections 
llvm-svn: 30570
 2006-09-21 17:35:47 +00:00
Devang Patel
5bc8dcf913 Use abstract class to facilitate dlopen() interface. 
llvm-svn: 30569
 2006-09-21 17:22:55 +00:00
Jim Laskey
50750cf500 Basic "in frame" alias analysis. 
llvm-svn: 30568
 2006-09-21 16:28:59 +00:00
Rafael Espindola
a51ec7153c more condition codes 
llvm-svn: 30567
 2006-09-21 13:06:26 +00:00
Rafael Espindola
4de4f87be5 if a constant can't be an immediate, add it to the constant pool 
llvm-svn: 30566
 2006-09-21 11:29:52 +00:00
Chris Lattner
c17b86ef22 fold (aext (and (trunc x), cst)) -> (and x, cst). 
llvm-svn: 30561
 2006-09-21 06:40:43 +00:00
Chris Lattner
d9fca453f1 Check the right value type. This fixes 186.crafty on x86 
llvm-svn: 30560
 2006-09-21 06:17:39 +00:00
Chris Lattner
ba7013ca78 implemented 
llvm-svn: 30559
 2006-09-21 06:14:54 +00:00
Chris Lattner
34768d5361 Compile: 
int %test(ulong *%tmp) {
        %tmp = load ulong* %tmp         ; <ulong> [#uses=1]
        %tmp.mask = shr ulong %tmp, ubyte 50            ; <ulong> [#uses=1]
        %tmp.mask = cast ulong %tmp.mask to ubyte
        %tmp2 = and ubyte %tmp.mask, 3          ; <ubyte> [#uses=1]
        %tmp2 = cast ubyte %tmp2 to int         ; <int> [#uses=1]
        ret int %tmp2
}

to:

_test:
        movl 4(%esp), %eax
        movl 4(%eax), %eax
        shrl $18, %eax
        andl $3, %eax
        ret

instead of:

_test:
        movl 4(%esp), %eax
        movl 4(%eax), %eax
        shrl $18, %eax
        # TRUNCATE movb %al, %al
        andb $3, %al
        movzbl %al, %eax
        ret

llvm-svn: 30558
 2006-09-21 06:14:31 +00:00
Chris Lattner
eb12877970 Generalize (zext (truncate x)) and (sext (truncate x)) folding to work when 
the src/dst are not the same size.  This catches things like "truncate
32-bit X to 8 bits, then zext to 16", which happens a bit on X86.

llvm-svn: 30557
 2006-09-21 06:00:20 +00:00
Chris Lattner
437703d4c9 Fit in 80-cols 
llvm-svn: 30556
 2006-09-21 05:46:00 +00:00
Chris Lattner
e87cf1c708 Fix Transforms/IndVarsSimplify/2006-09-20-LFTR-Crash.ll 
llvm-svn: 30555
 2006-09-21 05:12:20 +00:00
Chris Lattner
0ba3a4b93c new testcase 
llvm-svn: 30554
 2006-09-21 05:11:01 +00:00
Nick Lewycky
401794f2a7 Fix compile error. 
llvm-svn: 30553
 2006-09-21 02:08:31 +00:00
Nick Lewycky
2aff202559 Don't rewrite ConstantExpr::get. 
llvm-svn: 30552
 2006-09-21 01:05:35 +00:00
Nick Lewycky
eb301d20a6 Once we're down to "setcc type constant1, constant2", at least come up 
with the right answer.

llvm-svn: 30550
 2006-09-20 23:02:24 +00:00
Anton Korobeynikov
59ef7e94eb Adding codegeneration for StdCall & FastCall calling conventions 
llvm-svn: 30549
 2006-09-20 22:03:51 +00:00
Andrew Lenharth
ce3954cac0 Account for pseudo-ops correctly 
llvm-svn: 30548
 2006-09-20 20:08:52 +00:00
Chris Lattner
663748827c The DarwinAsmPrinter need not check for isDarwin. createPPCAsmPrinterPass 
should create the right asmprinter subclass.

llvm-svn: 30542
 2006-09-20 17:12:19 +00:00
Chris Lattner
6d66264a5f Wrap some darwin'isms with isDarwin checks. 
llvm-svn: 30541
 2006-09-20 17:07:15 +00:00
Nick Lewycky
99b3c50130 Use a total ordering to compare instructions. 
Fixes infinite loop in resolve().

llvm-svn: 30540
 2006-09-20 17:04:01 +00:00
Andrew Lenharth
cf0746ba2a simplify 
llvm-svn: 30535
 2006-09-20 15:37:57 +00:00
Andrew Lenharth
d12f2d614a catch constants more often 
llvm-svn: 30534
 2006-09-20 15:05:49 +00:00
Andrew Lenharth
054efcd85d catch another constant 
llvm-svn: 30533
 2006-09-20 15:04:55 +00:00
Andrew Lenharth
3be0c58274 clarify with test case 
llvm-svn: 30531
 2006-09-20 14:48:00 +00:00
Andrew Lenharth
2ccefe5b91 Add Note 
llvm-svn: 30530
 2006-09-20 14:40:01 +00:00
Jim Laskey
a46690e7de Trim the home directory from the dejagnu test 
llvm-svn: 30519
 2006-09-20 09:20:22 +00:00
Chris Lattner
6b434ee662 item done 
llvm-svn: 30518
 2006-09-20 06:41:56 +00:00
Chris Lattner
a0243b3ad3 Compile: 
int test3(int a, int b) { return (a < 0) ? a : 0; }

to:

_test3:
        srawi r2, r3, 31
        and r3, r2, r3
        blr

instead of:

_test3:
        cmpwi cr0, r3, 1
        li r2, 0
        blt cr0, LBB2_2 ;entry
LBB2_1: ;entry
        mr r3, r2
LBB2_2: ;entry
        blr


This implements: PowerPC/select_lt0.ll:seli32_a_a

llvm-svn: 30517
 2006-09-20 06:41:35 +00:00
Chris Lattner
2d711ecbc2 new testcase 
llvm-svn: 30516
 2006-09-20 06:40:37 +00:00
Chris Lattner
f9c4e07bf7 add a note 
llvm-svn: 30515
 2006-09-20 06:32:10 +00:00
Chris Lattner
e78d019082 Fold the full generality of (any_extend (truncate x)) 
llvm-svn: 30514
 2006-09-20 06:29:17 +00:00
Chris Lattner
6440707b6f Two things: 
1. teach SimplifySetCC that '(srl (ctlz x), 5) == 0' is really x != 0.
2. Teach visitSELECT_CC to use SimplifySetCC instead of calling it and
   ignoring the result.  This allows us to compile:

bool %test(ulong %x) {
  %tmp = setlt ulong %x, 4294967296
  ret bool %tmp
}

to:

_test:
        cntlzw r2, r3
        cmplwi cr0, r3, 1
        srwi r2, r2, 5
        li r3, 0
        beq cr0, LBB1_2 ;
LBB1_1: ;
        mr r3, r2
LBB1_2: ;
        blr

instead of:

_test:
        addi r2, r3, -1
        cntlzw r2, r2
        cntlzw r3, r3
        srwi r2, r2, 5
        cmplwi cr0, r2, 0
        srwi r2, r3, 5
        li r3, 0
        bne cr0, LBB1_2 ;
LBB1_1: ;
        mr r3, r2
LBB1_2: ;
        blr

This isn't wonderful, but it's an improvement.

llvm-svn: 30513
 2006-09-20 06:19:26 +00:00
Chris Lattner
102718b1b2 This is already done 
llvm-svn: 30512
 2006-09-20 04:59:33 +00:00
Chris Lattner
6ddcf6bba8 We went through all that trouble to compute whether it was safe to transform 
this comparison, but never checked it.  Whoops, no wonder we miscompiled
177.mesa!

llvm-svn: 30511
 2006-09-20 04:44:59 +00:00
Chris Lattner
4d97247875 Improve PPC64 equality comparisons like PPC32 comparisons. 
llvm-svn: 30510
 2006-09-20 04:33:27 +00:00
Chris Lattner
69390a3f80 Two improvements: 
1. Codegen this comparison:
     if (X == 0x8000)

as:

        cmplwi cr0, r3, 32768
        bne cr0, LBB1_2 ;cond_next

instead of:

        lis r2, 0
        ori r2, r2, 32768
        cmpw cr0, r3, r2
        bne cr0, LBB1_2 ;cond_next


2. Codegen this comparison:
      if (X == 0x12345678)

as:

        xoris r2, r3, 4660
        cmplwi cr0, r2, 22136
        bne cr0, LBB1_2 ;cond_next

instead of:

        lis r2, 4660
        ori r2, r2, 22136
        cmpw cr0, r3, r2
        bne cr0, LBB1_2 ;cond_next

llvm-svn: 30509
 2006-09-20 04:25:47 +00:00