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Author SHA1 Message Date
Chris Lattner
583dcc66f2 X86 zero extends setcc results 
llvm-svn: 21146
 2005-04-07 19:41:46 +00:00
Chris Lattner
f275f2af41 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.

llvm-svn: 21145
 2005-04-07 19:41:18 +00:00
Chris Lattner
bbe0e9e9db Remove somethign I had for testing 
llvm-svn: 21144
 2005-04-07 18:58:54 +00:00
Andrew Lenharth
c3e5c42b86 fix a small optimization opertunity and make gcc happy 
llvm-svn: 21143
 2005-04-07 18:15:28 +00:00
Chris Lattner
ee836c7b32 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

llvm-svn: 21142
 2005-04-07 18:14:58 +00:00
Andrew Lenharth
41c31864ee match case change in codegen 
llvm-svn: 21141
 2005-04-07 17:47:00 +00:00
Andrew Lenharth
469244a2b4 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 
llvm-svn: 21140
 2005-04-07 17:19:16 +00:00
Andrew Lenharth
61215a78fb lowercase instructions, makes diff happier 
llvm-svn: 21139
 2005-04-07 17:17:48 +00:00
Chris Lattner
05d79f36b1 Implement the following xforms: 
(X-Y)-X --> -Y
A + (B - A) --> B
(B - A) + A --> B

llvm-svn: 21138
 2005-04-07 17:14:51 +00:00
Chris Lattner
bb9a5cbdd7 new test 
llvm-svn: 21137
 2005-04-07 16:41:45 +00:00
Chris Lattner
5b31ada26d 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.

llvm-svn: 21136
 2005-04-07 16:28:01 +00:00
Chris Lattner
c2ab987755 new testcase 
llvm-svn: 21135
 2005-04-07 16:24:59 +00:00
Chris Lattner
ea1752ddf5 Transform X-(X+Y) == -Y and X-(Y+X) == -Y 
llvm-svn: 21134
 2005-04-07 16:15:25 +00:00
Andrew Lenharth
3d1228500d It wasn't happy about this either 
llvm-svn: 21133
 2005-04-07 14:18:13 +00:00
Andrew Lenharth
ce0dcea720 Yea, it wasn't happy 
llvm-svn: 21132
 2005-04-07 13:55:53 +00:00
Duraid Madina
ab6e2cfaeb teach asmprinter to print s8/s14 operands 
llvm-svn: 21131
 2005-04-07 12:34:36 +00:00
Duraid Madina
ed8eb83203 codegen immediate forms of add/sub/shift 
llvm-svn: 21130
 2005-04-07 12:33:38 +00:00
Duraid Madina
5c4a7b68b3 add immediate forms of add, sub, shift 
llvm-svn: 21129
 2005-04-07 12:32:24 +00:00
Chris Lattner
22bbc2351e Fix a really scary bug that Nate found where we weren't deleting the right 
elements auto of the autoCSE maps.

llvm-svn: 21128
 2005-04-07 00:30:13 +00:00
Nate Begeman
b890f32ac9 Pattern match bitfield insert, which helps shift long by immediate, among 
other things.

llvm-svn: 21127
 2005-04-06 23:51:40 +00:00
Nate Begeman
6c5e4c3bb1 Fix some shift bugs 
llvm-svn: 21126
 2005-04-06 22:42:08 +00:00
Alkis Evlogimenos
242fe17bc4 Make these 64 bit constants so that this compiles on x86-32 as well. 
llvm-svn: 21125
 2005-04-06 22:09:40 +00:00
Andrew Lenharth
abf46a4f5e added sdiv by 2^k and works for neg divisors also 
llvm-svn: 21124
 2005-04-06 22:03:13 +00:00
Chris Lattner
49d166c6b6 Don't make this require loopsimplify. It works BETTER with loop simplify 
but should not require it.

llvm-svn: 21123
 2005-04-06 21:45:00 +00:00
Nate Begeman
7898fc8cc8 Teach ExpandShift how to handle shifts by a constant. This allows targets 
like PowerPC to codegen long shifts in many fewer instructions.

llvm-svn: 21122
 2005-04-06 21:13:14 +00:00
Andrew Lenharth
5c71402202 fix copy/paste errors, and add imm support to SxADDQ and SxSUBQ 
llvm-svn: 21121
 2005-04-06 20:59:59 +00:00
Chris Lattner
40ee8a062b 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.

llvm-svn: 21120
 2005-04-06 20:59:35 +00:00
Andrew Lenharth
e7efd9b90d simplified 
llvm-svn: 21119
 2005-04-06 20:59:03 +00:00
Andrew Lenharth
a533de94b9 added first alpha codegen regression test 
llvm-svn: 21117
 2005-04-06 20:39:17 +00:00
Andrew Lenharth
9f65102f9b Added Nate's div by constant stuff, also scaled operations! 
llvm-svn: 21116
 2005-04-06 20:25:34 +00:00
Chris Lattner
7c0786dda8 Fix a namespace issue, reported by Vladimir Merzliakov! 
llvm-svn: 21115
 2005-04-06 19:45:39 +00:00
Duraid Madina
5fa854a7fe steal sampo's div-by-constant-power-of-2 stuff 
thanks sampo!!

llvm-svn: 21113
 2005-04-06 09:55:17 +00:00
Duraid Madina
1d156293cb add fms instruction 
llvm-svn: 21112
 2005-04-06 09:54:09 +00:00
Nate Begeman
98251d6a1c 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.

llvm-svn: 21111
 2005-04-06 06:44:57 +00:00
Duraid Madina
2db29b8016 lie a bit and say that r1/r12 (GP/SP) _aren't_ callee-save, as we take 
care of this ourselves

llvm-svn: 21110
 2005-04-06 06:18:36 +00:00
Duraid Madina
62c4de8d62 make sure 'special' registers don't get allocated 
llvm-svn: 21109
 2005-04-06 06:17:54 +00:00
Chris Lattner
4201b81130 document these nodes, as they are nonobvious 
llvm-svn: 21108
 2005-04-06 04:21:29 +00:00
Chris Lattner
c87ff88efb Add (untested) support for MULHS and MULHU. 
llvm-svn: 21107
 2005-04-06 04:21:07 +00:00
Chris Lattner
ba7cdbebb1 add signed versions of the extra precision multiplies 
llvm-svn: 21106
 2005-04-06 04:19:22 +00:00
Nate Begeman
aee0f81849 Turn off the div -> mul optimization until it works correctly 100% of the 
time.

llvm-svn: 21105
 2005-04-06 03:36:33 +00:00
Nate Begeman
b44597771c 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.

llvm-svn: 21104
 2005-04-06 00:25:27 +00:00
Nate Begeman
4457b4994c Expand SREM and UREM for targets that claim not to have them, like PowerPC 
llvm-svn: 21103
 2005-04-06 00:23:54 +00:00
Nate Begeman
12af81407b Add MULHU and MULHS nodes for the high part of an (un)signed 32x32=64b 
multiply.

llvm-svn: 21102
 2005-04-05 22:36:56 +00:00
Andrew Lenharth
613a940af8 added lowerargs support for varargs 
llvm-svn: 21101
 2005-04-05 20:51:46 +00:00
Nate Begeman
82ff41c342 Behold, rlwinm with certain immediate arguments is printed as the much more 
readable slwi or srwi (shift left/right word immediate).

llvm-svn: 21099
 2005-04-05 18:19:50 +00:00
Nate Begeman
581553fd21 Fix cut & paste errors (32->64), and codegen float->int more optimally. 
llvm-svn: 21098
 2005-04-05 17:32:30 +00:00
Tanya Lattner
4d8f553a82 Updated to use dep analyzer. 
llvm-svn: 21097
 2005-04-05 16:36:44 +00:00
Nate Begeman
152dbbe856 Remove 64 bit simple ISel, it never worked correctly 
Add initial (buggy) implementation of 64 bit pattern ISel

llvm-svn: 21096
 2005-04-05 08:51:15 +00:00
Nate Begeman
a18a26f47c Back out the previous change to SelectBranchCC, since there are cases it 
could miscompile.  A correct solution will be found in the near future.

llvm-svn: 21095
 2005-04-05 04:32:16 +00:00
Nate Begeman
358dee806e Rename canUseAsImmediateForOpcode to getImmediateForOpcode to better 
indicate that it is not a boolean function.
Properly emit the pseudo instruction for conditional branch, so that we
  can fix up conditional branches whose displacements are too large.
Reserve the right amount of opcode space for said pseudo instructions.

llvm-svn: 21094
 2005-04-05 04:22:58 +00:00