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Author SHA1 Message Date
Duraid Madina
6dcceb5ecb fix bogus division-by-power-of-2 (was wrong for negative input, adds extr insn) 
fix hack in division (clean up frcpa instruction)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21153 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-08 10:01:48 +00:00
Chris Lattner
bf70b838e7 Fix bug: InstCombine/2005-05-07-UDivSelectCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21152 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-08 04:03:26 +00:00
Chris Lattner
b37246d65e new testcase that crashes the instcombiner. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21151 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-08 03:58:21 +00:00
Nate Begeman
7e7fadd2ea Optimized code sequences for setcc reg, 0 
Optimized code sequence for (a < 0) ? b : 0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21150 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 20:30:01 +00:00
Andrew Lenharth
d3355e22a7 Alpha zero extends setcc results 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21149 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 20:11:32 +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
cbd06fc3d7 PowerPC zero extends setcc results 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21147 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 19:41:49 +00:00
Chris Lattner
6659bd7592 X86 zero extends setcc results 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21146 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 19:41:46 +00:00
Chris Lattner
7b5987d56e Allow targets which produce setcc results in non-MVT::i1 registers to describe 
what the contents of the top bits of these registers are, in the common cases
of targets that sign and zero extend the results.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21145 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 19:41:18 +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
Andrew Lenharth
2966e84a8d fix a small optimization opertunity and make gcc happy 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21143 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 18:15:28 +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
Andrew Lenharth
0b5031abd4 match case change in codegen 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21141 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 17:47:00 +00:00
Andrew Lenharth
320174f009 fixup magic constant making code. tested by thousands of random divisions.... by 10000. ok, so random divisors would be good too, but this at least fixes some things 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21140 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 17:19:16 +00:00
Andrew Lenharth
9bf59d7ed2 lowercase instructions, makes diff happier 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21139 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 17:17:48 +00:00
Chris Lattner
7edc8c223e Implement the following xforms: 
(X-Y)-X --> -Y
A + (B - A) --> B
(B - A) + A --> B


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21138 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 17:14:51 +00:00
Chris Lattner
7c52702201 new test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21137 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 16:41:45 +00:00
Chris Lattner
08954a26e4 Implement InstCombine/add.ll:test28, transforming C1-(X+C2) --> (C1-C2)-X. 
This occurs several dozen times in specint2k, particularly in crafty and gcc
apparently.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21136 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 16:28:01 +00:00
Chris Lattner
3d173b3638 new testcase 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21135 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 16:24:59 +00:00
Chris Lattner
43d84d6b71 Transform X-(X+Y) == -Y and X-(Y+X) == -Y 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21134 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 16:15:25 +00:00
Andrew Lenharth
273a1f956f It wasn't happy about this either 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21133 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 14:18:13 +00:00
Andrew Lenharth
706be918ca Yea, it wasn't happy 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21132 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 13:55:53 +00:00
Duraid Madina
e6a0b6cbda teach asmprinter to print s8/s14 operands 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21131 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 12:34:36 +00:00
Duraid Madina
f55e403ef9 codegen immediate forms of add/sub/shift 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21130 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 12:33:38 +00:00
Duraid Madina
18c0c6bcc4 add immediate forms of add, sub, shift 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21129 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 12:32:24 +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
7ddecb4186 Pattern match bitfield insert, which helps shift long by immediate, among 
other things.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21127 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 23:51:40 +00:00
Nate Begeman
020ef42c19 Fix some shift bugs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21126 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 22:42:08 +00:00
Alkis Evlogimenos
aeca558788 Make these 64 bit constants so that this compiles on x86-32 as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21125 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 22:09:40 +00:00
Andrew Lenharth
a565c275b5 added sdiv by 2^k and works for neg divisors also 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21124 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 22:03:13 +00:00
Chris Lattner
6128690c62 Don't make this require loopsimplify. It works BETTER with loop simplify 
but should not require it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21123 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 21:45:00 +00:00
Nate Begeman
f1fe32e337 Teach ExpandShift how to handle shifts by a constant. This allows targets 
like PowerPC to codegen long shifts in many fewer instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21122 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 21:13:14 +00:00
Andrew Lenharth
f77f395043 fix copy/paste errors, and add imm support to SxADDQ and SxSUBQ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21121 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 20:59:59 +00:00
Chris Lattner
6d027f2e6f Fix SingleSource/Regression/C/2005-05-06-LongLongSignedShift.c, we were not 
properly sign extending the top of the result of a 64-bit shift right by
a constant > 32.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21120 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 20:59:35 +00:00
Andrew Lenharth
3a46221d0b simplified 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21119 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 20:59:03 +00:00
Andrew Lenharth
0def226064 added first alpha codegen regression test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21117 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 20:39:17 +00:00
Andrew Lenharth
4b8ac1559a Added Nate's div by constant stuff, also scaled operations! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21116 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 20:25:34 +00:00
Chris Lattner
ce91ec9ae6 Fix a namespace issue, reported by Vladimir Merzliakov! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21115 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 19:45:39 +00:00
Duraid Madina
4826a0786d steal sampo's div-by-constant-power-of-2 stuff 
thanks sampo!!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21113 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 09:55:17 +00:00
Duraid Madina
b366a02ff2 add fms instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21112 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 09:54:09 +00:00
Nate Begeman
27b4c23b80 Fixed version of optimized integer divide is now fixed. Calculate the 
quotient, not the remainder.  Also, make sure to remove the old div operand
from the ExprMap and let SelectExpr insert the new one.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21111 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 06:44:57 +00:00
Duraid Madina
b70c2f3ef7 lie a bit and say that r1/r12 (GP/SP) _aren't_ callee-save, as we take 
care of this ourselves


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21110 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 06:18:36 +00:00
Duraid Madina
4ee131ffa8 make sure 'special' registers don't get allocated 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21109 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 06:17:54 +00:00
Chris Lattner
bede0b7dd7 document these nodes, as they are nonobvious 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21108 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 04:21:29 +00:00
Chris Lattner
8db0af1c8d Add (untested) support for MULHS and MULHU. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21107 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 04:21:07 +00:00
Chris Lattner
1e6a71524e add signed versions of the extra precision multiplies 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21106 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 04:19:22 +00:00
Nate Begeman
8f52980f03 Turn off the div -> mul optimization until it works correctly 100% of the 
time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21105 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 03:36:33 +00:00
Nate Begeman
815d6dac1e Add support for MULHS and MULHU nodes 
Have LegalizeDAG handle SREM and UREM for us
Codegen SDIV and UDIV by constant as a multiply by magic constant instead
of integer divide, which is very slow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21104 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 00:25:27 +00:00
Nate Begeman
c105e19864 Expand SREM and UREM for targets that claim not to have them, like PowerPC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21103 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 00:23:54 +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