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3543 Commits

Author SHA1 Message Date
Evan Cheng
d1915cfa6f Revert an un-intended change 
llvm-svn: 28278
 2006-05-13 05:53:47 +00:00
Chris Lattner
69a0ce6261 Merge identical code. 
llvm-svn: 28274
 2006-05-13 02:11:14 +00:00
Evan Cheng
a726fc6dbf If the register allocator cannot find a register to spill, try the aliases. If 
that still fails (because all the register spill weights are inf), just grab
one.

llvm-svn: 28262
 2006-05-12 19:07:46 +00:00
Chris Lattner
53cdb2f2b0 Remove dead vars 
llvm-svn: 28255
 2006-05-12 18:06:45 +00:00
Chris Lattner
da076e41ab remove dead vars 
llvm-svn: 28254
 2006-05-12 18:04:28 +00:00
Chris Lattner
fe211deedf Remove dead variable 
llvm-svn: 28253
 2006-05-12 18:02:04 +00:00
Chris Lattner
afe72481f6 Comment out dead variables 
llvm-svn: 28252
 2006-05-12 17:57:54 +00:00
Chris Lattner
936cd3390d Remove dead var 
llvm-svn: 28250
 2006-05-12 17:50:35 +00:00
Chris Lattner
8c02c3f41a Compile: 
%tmp152 = setgt uint %tmp144, %tmp149           ; <bool> [#uses=1]
        %tmp159 = setlt uint %tmp144, %tmp149           ; <bool> [#uses=1]
        %bothcond2 = or bool %tmp152, %tmp159           ; <bool> [#uses=1]

To setne, not setune, which causes an assertion fault.

llvm-svn: 28244
 2006-05-12 17:03:46 +00:00
Owen Anderson
8c2c1e90c4 Refactor a bunch of includes so that TargetMachine.h doesn't have to include 
TargetData.h.  This should make recompiles a bit faster with my current
TargetData tinkering.

llvm-svn: 28238
 2006-05-12 06:33:49 +00:00
Evan Cheng
6a6886185b Backing out fix for PR770. Need to re-apply it after live range splitting is possible 
llvm-svn: 28236
 2006-05-12 06:06:34 +00:00
Evan Cheng
095c9d9b7f Duh. That could take a long time. 
llvm-svn: 28235
 2006-05-12 06:05:18 +00:00
Chris Lattner
66adee93aa Two simplifications for token factor nodes: simplify tf(x,x) -> x. 
simplify tf(x,y,y,z) -> tf(x,y,z).

llvm-svn: 28233
 2006-05-12 05:01:37 +00:00
Evan Cheng
afed73eebe Add capability to scheduler to commute nodes for profit. 
If a two-address code whose first operand has uses below, it should be commuted
when possible.

llvm-svn: 28230
 2006-05-12 01:58:24 +00:00
Evan Cheng
d38c22bdd3 Refactor scheduler code. Move register-reduction list scheduler to a 
separate file. Added an initial implementation of top-down register pressure
reduction list scheduler.

llvm-svn: 28226
 2006-05-11 23:55:42 +00:00
Evan Cheng
47926aff96 Set weight of zero length intervals to infinite to prevent them from being 
spilled.

llvm-svn: 28220
 2006-05-11 07:29:24 +00:00
Evan Cheng
db6aa4896b Backing out previous check-in. 
llvm-svn: 28219
 2006-05-11 07:28:16 +00:00
Evan Cheng
6ad040a6bc If the live interval legnth is essentially zero, i.e. in every live range 
the use follows def immediately, it doesn't make sense to spill it and
hope it will be easier to allocate for this LI.

llvm-svn: 28217
 2006-05-10 22:30:41 +00:00
Evan Cheng
9665ba053f Templatify RegReductionPriorityQueue 
llvm-svn: 28212
 2006-05-10 06:16:44 +00:00
Nate Begeman
1a225d23ae Fix PR773 
llvm-svn: 28207
 2006-05-09 18:20:51 +00:00
Chris Lattner
f801792e08 Fix a regression in my patch from last night that broke the llvmgcc4 build on 
ppc

llvm-svn: 28205
 2006-05-09 16:41:59 +00:00
Evan Cheng
7d693898ee Add pseudo dependency to force a def&use operand to be scheduled last (unless 
the distance between the def and another use is much longer). This is under
option control for now "-sched-lower-defnuse".

llvm-svn: 28201
 2006-05-09 07:13:34 +00:00
Evan Cheng
2c74848af1 Debugging info 
llvm-svn: 28200
 2006-05-09 06:55:15 +00:00
Evan Cheng
ae45020720 PR 770 - permit coallescing of registers in subset register classes. 
llvm-svn: 28197
 2006-05-09 06:37:48 +00:00
Chris Lattner
4ebc6a2311 Implement MASM sections correctly, without a "has masm sections flag" and a bunch of special case code. 
llvm-svn: 28194
 2006-05-09 05:33:48 +00:00
Chris Lattner
8c2bfc0659 Oh yeah, there are two of these now, unify both. 
llvm-svn: 28192
 2006-05-09 05:24:50 +00:00
Chris Lattner
6341df8069 Setting SwitchToSectionDirective properly in the MASM backend permits a bunch 
of code to be unified.

llvm-svn: 28191
 2006-05-09 05:23:12 +00:00
Chris Lattner
d36cc2b610 Don't prefix section directives with a tab. Doing so causes blank lines to 
be emitted to the .s file.

llvm-svn: 28189
 2006-05-09 05:19:59 +00:00
Chris Lattner
e64f764d25 Make the masm codepath work like the normal code path. 
llvm-svn: 28188
 2006-05-09 05:15:58 +00:00
Chris Lattner
c0f0dfa56f The MASM asmprinter has been fixed, these hacks are no longer needed. 
llvm-svn: 28186
 2006-05-09 05:13:34 +00:00
Chris Lattner
8488ba2e41 Split SwitchSection into SwitchTo{Text|Data}Section methods. 
llvm-svn: 28184
 2006-05-09 04:59:56 +00:00
Chris Lattner
446e1ef26a Make the case I just checked in stronger. Now we compile this: 
short test2(short X, short x) {
  int Y = (short)(X+x);
  return Y >> 1;
}

to:

_test2:
        add r2, r3, r4
        extsh r2, r2
        srawi r3, r2, 1
        blr

instead of:

_test2:
        add r2, r3, r4
        extsh r2, r2
        srwi r2, r2, 1
        extsh r3, r2
        blr

llvm-svn: 28175
 2006-05-08 21:18:59 +00:00
Chris Lattner
29062da0ac Implement and_sext.ll:test3, generating: 
_test4:
        srawi r3, r3, 16
        blr

instead of:

_test4:
        srwi r2, r3, 16
        extsh r3, r2
        blr

for:

short test4(unsigned X) {
  return (X >> 16);
}

llvm-svn: 28174
 2006-05-08 20:59:41 +00:00
Chris Lattner
2935d8190c Compile this: 
short test4(unsigned X) {
  return (X >> 16);
}

to:

_test4:
        movl 4(%esp), %eax
        sarl $16, %eax
        ret

instead of:

_test4:
        movl $-65536, %eax
        andl 4(%esp), %eax
        sarl $16, %eax
        ret

llvm-svn: 28171
 2006-05-08 20:51:54 +00:00
Chris Lattner
78da6792e7 Fold shifts with undef operands. 
llvm-svn: 28167
 2006-05-08 17:29:49 +00:00
Nate Begeman
d7a19102d1 Make emission of jump tables a bit less conservative; they are now required 
to be only 31.25% dense, rather than 75% dense.

llvm-svn: 28165
 2006-05-08 16:51:36 +00:00
Nate Begeman
e5ce5bb6da Fix PR772 
llvm-svn: 28161
 2006-05-08 01:35:01 +00:00
Chris Lattner
7e7bcf3a54 Simplify some code, add a couple minor missed folds 
llvm-svn: 28152
 2006-05-06 23:06:26 +00:00
Chris Lattner
751817c54f constant fold sign_extend_inreg 
llvm-svn: 28151
 2006-05-06 23:05:41 +00:00
Chris Lattner
2a4d7b845b remove cases handled elsewhere 
llvm-svn: 28150
 2006-05-06 22:43:44 +00:00
Jeff Cohen
ce9b9fe6eb Fix some loose ends in MASM support. 
llvm-svn: 28148
 2006-05-06 21:27:14 +00:00
Chris Lattner
1ecb2a2dac Use the new TargetLowering::ComputeNumSignBits method to eliminate 
sign_extend_inreg operations.  Though ComputeNumSignBits is still rudimentary,
this is enough to compile this:

short test(short X, short x) {
  int Y = X+x;
  return (Y >> 1);
}
short test2(short X, short x) {
  int Y = (short)(X+x);
  return Y >> 1;
}

into:

_test:
        add r2, r3, r4
        srawi r3, r2, 1
        blr
_test2:
        add r2, r3, r4
        extsh r2, r2
        srawi r3, r2, 1
        blr

instead of:

_test:
        add r2, r3, r4
        srawi r2, r2, 1
        extsh r3, r2
        blr
_test2:
        add r2, r3, r4
        extsh r2, r2
        srawi r2, r2, 1
        extsh r3, r2
        blr

llvm-svn: 28146
 2006-05-06 09:30:03 +00:00
Chris Lattner
21cd99024a When inserting casts, be careful of where we put them. We cannot insert 
a cast immediately before a PHI node.

This fixes Regression/CodeGen/Generic/2006-05-06-GEP-Cast-Sink-Crash.ll

llvm-svn: 28143
 2006-05-06 09:10:37 +00:00
Chris Lattner
907e392dba Fold trunc(any_ext). This gives stuff like: 
27,28c27
<       movzwl %di, %edi
<       movl %edi, %ebx
---
>       movw %di, %bx

llvm-svn: 28137
 2006-05-05 22:56:26 +00:00
Chris Lattner
57f8c5a387 Shrink shifts when possible. 
llvm-svn: 28136
 2006-05-05 22:53:17 +00:00
Chris Lattner
a633c31319 Indent multiline asm strings more nicely 
llvm-svn: 28132
 2006-05-05 21:47:05 +00:00
Chris Lattner
3d26577396 Fold (fpext (load x)) -> (extload x) 
llvm-svn: 28130
 2006-05-05 21:34:35 +00:00
Chris Lattner
3e3f2c63c3 More aggressively sink GEP offsets into loops. For example, before we 
generated:

        movl 8(%esp), %eax
        movl %eax, %edx
        addl $4316, %edx
        cmpb $1, %cl
        ja LBB1_2       #cond_false
LBB1_1: #cond_true
        movl L_QuantizationTables720$non_lazy_ptr, %ecx
        movl %ecx, (%edx)
        movl L_QNOtoQuantTableShift720$non_lazy_ptr, %edx
        movl %edx, 4460(%eax)
        ret
...

Now we generate:

        movl 8(%esp), %eax
        cmpb $1, %cl
        ja LBB1_2       #cond_false
LBB1_1: #cond_true
        movl L_QuantizationTables720$non_lazy_ptr, %ecx
        movl %ecx, 4316(%eax)
        movl L_QNOtoQuantTableShift720$non_lazy_ptr, %ecx
        movl %ecx, 4460(%eax)
        ret

... which uses one fewer register.

llvm-svn: 28129
 2006-05-05 21:17:49 +00:00
Chris Lattner
25a5283a86 Fold some common code. 
llvm-svn: 28124
 2006-05-05 06:32:04 +00:00
Chris Lattner
002ee91457 Implement: 
// fold (and (sext x), (sext y)) -> (sext (and x, y))
  // fold (or  (sext x), (sext y)) -> (sext (or  x, y))
  // fold (xor (sext x), (sext y)) -> (sext (xor x, y))
  // fold (and (aext x), (aext y)) -> (aext (and x, y))
  // fold (or  (aext x), (aext y)) -> (aext (or  x, y))
  // fold (xor (aext x), (aext y)) -> (aext (xor x, y))

llvm-svn: 28123
 2006-05-05 06:31:05 +00:00