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2657 Commits

Author SHA1 Message Date
Evan Cheng
8820ad5154 Fixing 2006-05-01-SchedCausingSpills.ll; some clean up 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28279 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-13 08:22:24 +00:00
Evan Cheng
ee00a1d12c Revert an un-intended change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28278 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-13 05:53:47 +00:00
Chris Lattner
a2d079a776 Merge identical code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28274 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-13 02:11:14 +00:00
Evan Cheng
3b6d56cab3 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28262 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 19:07:46 +00:00
Chris Lattner
b5d9319bc5 Remove dead vars 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28255 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 18:06:45 +00:00
Chris Lattner
f1343c1b79 remove dead vars 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28254 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 18:04:28 +00:00
Chris Lattner
c485e55c65 Remove dead variable 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28253 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 18:02:04 +00:00
Chris Lattner
5eed34d208 Comment out dead variables 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28252 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 17:57:54 +00:00
Chris Lattner
9dcb780e23 Remove dead var 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28250 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 17:50:35 +00:00
Chris Lattner
e41102bb61 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28244 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 17:03:46 +00:00
Owen Anderson
07000c6f01 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28238 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 06:33:49 +00:00
Evan Cheng
647c15e58e Backing out fix for PR770. Need to re-apply it after live range splitting is possible 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28236 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 06:06:34 +00:00
Evan Cheng
626da3d9ae Duh. That could take a long time. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28235 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 06:05:18 +00:00
Chris Lattner
21a57dc751 Two simplifications for token factor nodes: simplify tf(x,x) -> x. 
simplify tf(x,y,y,z) -> tf(x,y,z).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28233 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 05:01:37 +00:00
Evan Cheng
13d41b9d72 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28230 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 01:58:24 +00:00
Evan Cheng
e165a78551 Refactor scheduler code. Move register-reduction list scheduler to a 
separate file. Added an initial implementation of top-down register pressure
reduction list scheduler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28226 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-11 23:55:42 +00:00
Evan Cheng
993141402f Set weight of zero length intervals to infinite to prevent them from being 
spilled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28220 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-11 07:29:24 +00:00
Evan Cheng
5d02eafaf2 Backing out previous check-in. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28219 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-11 07:28:16 +00:00
Evan Cheng
1f300190f3 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28217 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-10 22:30:41 +00:00
Evan Cheng
90db0358bb Templatify RegReductionPriorityQueue 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28212 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-10 06:16:44 +00:00
Nate Begeman
ec57fd91af Fix PR773 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28207 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 18:20:51 +00:00
Chris Lattner
c8d37c6e14 Fix a regression in my patch from last night that broke the llvmgcc4 build on 
ppc


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28205 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 16:41:59 +00:00
Evan Cheng
b63b067925 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".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28201 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 07:13:34 +00:00
Evan Cheng
60e8c71c9f Debugging info 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28200 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 06:55:15 +00:00
Evan Cheng
e73701df94 PR 770 - permit coallescing of registers in subset register classes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28197 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 06:37:48 +00:00
Chris Lattner
7faec9b93a Implement MASM sections correctly, without a "has masm sections flag" and a bunch of special case code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28194 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 05:33:48 +00:00
Chris Lattner
a7090ae7a3 Oh yeah, there are two of these now, unify both. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28192 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 05:24:50 +00:00
Chris Lattner
b81cb6133e Setting SwitchToSectionDirective properly in the MASM backend permits a bunch 
of code to be unified.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28191 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 05:23:12 +00:00
Chris Lattner
23b9eac4cb Don't prefix section directives with a tab. Doing so causes blank lines to 
be emitted to the .s file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28189 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 05:19:59 +00:00
Chris Lattner
13f161c518 Make the masm codepath work like the normal code path. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28188 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 05:15:58 +00:00
Chris Lattner
4ca4bb1ed2 The MASM asmprinter has been fixed, these hacks are no longer needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28186 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 05:13:34 +00:00
Chris Lattner
4632d7a570 Split SwitchSection into SwitchTo{Text|Data}Section methods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28184 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 04:59:56 +00:00
Chris Lattner
4b37e87ab9 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28175 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-08 21:18:59 +00:00
Chris Lattner
eaeda56649 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);
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28174 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-08 20:59:41 +00:00
Chris Lattner
a850446a0b 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28171 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-08 20:51:54 +00:00
Chris Lattner
2cfd6746ae Fold shifts with undef operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28167 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-08 17:29:49 +00:00
Chris Lattner
1b7371331f When tracking demanded bits, if any bits from the sext of an SRA are demanded, 
then so is the input sign bit.  This fixes mediabench/g721 on X86.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28166 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-08 17:22:53 +00:00
Nate Begeman
17c275ff2c Make emission of jump tables a bit less conservative; they are now required 
to be only 31.25% dense, rather than 75% dense.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28165 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-08 16:51:36 +00:00
Nate Begeman
5c742681ed Fix PR772 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28161 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-08 01:35:01 +00:00
Chris Lattner
822db93e57 Use ComputeMaskedBits to determine # sign bits as a fallback. This allows us 
to handle all kinds of stuff, including silly things like:
sextinreg(setcc,i16) -> setcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28155 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 23:48:13 +00:00
Chris Lattner
e60351bb72 Add some more sign propagation cases 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28154 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 23:40:29 +00:00
Chris Lattner
310b578023 Simplify some code, add a couple minor missed folds 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28152 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 23:06:26 +00:00
Chris Lattner
b9ebacdb4d constant fold sign_extend_inreg 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28151 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 23:05:41 +00:00
Chris Lattner
541a24f7af remove cases handled elsewhere 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28150 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 22:43:44 +00:00
Chris Lattner
d6f7fe76a6 Add some more simple sign bit propagation cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28149 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 22:39:59 +00:00
Jeff Cohen
d43b18d9e4 Fix some loose ends in MASM support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28148 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 21:27:14 +00:00
Chris Lattner
ee4ea92358 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28146 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 09:30:03 +00:00
Chris Lattner
5c3e21d687 Add some really really simple code for computing sign-bit propagation. 
This will certainly be enhanced in the future.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28145 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 09:27:13 +00:00
Chris Lattner
f0df8824eb 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28143 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 09:10:37 +00:00
Chris Lattner
c93dfda905 Fold (trunc (srl x, c)) -> (srl (trunc x), c) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28138 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 00:11:52 +00:00