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11368 Commits

Author SHA1 Message Date
Jim Laskey
242f2557cc Should be using flag and not chain. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23572 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 23:43:37 +00:00
Nate Begeman
2b5e66fc6e Remove some now-dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23571 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 21:28:27 +00:00
Andrew Lenharth
ac35cd207f subtarget support for CIX and FIX extentions (the only 2 I care about right now) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23569 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 20:24:38 +00:00
Jim Laskey
b6d4c2cf2d 1. Made things node-centric (from operand). 
2. Added node groups to handle flagged nodes.

3. Started weaning simple scheduling off existing emitter.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23566 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 19:15:27 +00:00
Chris Lattner
0f21fd5204 Rename MRegisterDesc -> TargetRegisterDesc for consistency 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23564 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:49:27 +00:00
Chris Lattner
863914feb5 trim down the target info structs now that we have a preferred spill register class for each callee save register 
Why is V9 maintaining these tables manually? ugh!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23561 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:38:36 +00:00
Chris Lattner
8fb040e584 now that we have a reg class to spill with, get this info from the regclass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23559 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:19:22 +00:00
Chris Lattner
5802be13e0 constant fold these calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23558 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:16:59 +00:00
Chris Lattner
56bcae0de9 simplify this code using the new regclass info passed in 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23557 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:12:38 +00:00
Chris Lattner
80a4f169b4 Now that we have getCalleeSaveRegClasses() info, use it to pass the register 
class into the spill/reload methods.  Targets can now rely on that argument.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23556 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 16:59:07 +00:00
Chris Lattner
e4047188e7 stub out a virtual method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23554 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 06:55:18 +00:00
Chris Lattner
d174fe0ec3 CR registers are not used by this "target" 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23552 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 06:43:58 +00:00
Chris Lattner
0a37960d32 these registers don't belong to any register classes, so don't mark them 
as callee save.  They can never be generated by the compiler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23551 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 06:42:24 +00:00
Chris Lattner
ef242b1ccc Now that self referential classes are supported, get rid of a work-around. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23544 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 04:13:23 +00:00
Chris Lattner
b48d2cf5eb pass extra args 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23539 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:31:52 +00:00
Chris Lattner
0ffb1a56ff these methods get extra args 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23538 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:30:55 +00:00
Chris Lattner
97d5e6461a Pass extra regclasses into spilling code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23537 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:29:42 +00:00
Chris Lattner
bf9716b9c4 Change this code ot pass register classes into the stack slot spiller/reloader 
code.  PrologEpilogInserter hasn't been updated yet though, so targets cannot
use this info.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23536 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:29:00 +00:00
Chris Lattner
ff201eebea Use the 32-bit version for now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23534 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 00:05:05 +00:00
Chris Lattner
67ab118a6d Add a bunch of patterns for F64 FP ops, add some more integer ops 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23533 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 23:34:24 +00:00
Chris Lattner
237733e933 Remove code for patterns that are autogenerated 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23532 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 23:33:31 +00:00
Andrew Lenharth
120ab480ab begining alpha subtarget support 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23531 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 22:54:56 +00:00
Chris Lattner
c7a37a52cd tblgen autogens this pattern now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23530 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 22:37:24 +00:00
Andrew Lenharth
68fd4866de copy and paste error 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23528 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 21:11:57 +00:00
Chris Lattner
221e53caea now that tblgen is smarter, this pattern is not needed. Also, tblgen 
now inverts commuted versions of ANDC/ORC with the current .td file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23527 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 19:29:15 +00:00
Chris Lattner
93e50ce04c Insert stores after phi nodes in the normal dest. This fixes 
LowerInvoke/2005-08-03-InvokeWithPHI.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23525 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 17:44:20 +00:00
Chris Lattner
52897f827e consistency with other cases, no functionality change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23524 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 17:38:52 +00:00
Chris Lattner
f13befb456 Make the JIT default to the DAG isel instead of the pattern isel, like LLC. 
The Pattern isel has some strange memory corruption issues going on. :(

This should have been converted over anyway, but it got forgotten somehow
when switching to the dag isel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23523 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 17:31:03 +00:00
Chris Lattner
473a99073c Fix two bugs in my patch earlier today that broke int->fp conversion on X86. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23522 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 06:44:39 +00:00
Chris Lattner
a48bc53cad Fold isascii into a simple comparison. This speeds up 197.parser by 7.4%, 
bringing the LLC time down to the CBE time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23521 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 06:17:27 +00:00
Chris Lattner
e9b6242780 remove a bunch of unneeded stuff, or self evident comments 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23519 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 06:16:11 +00:00
Chris Lattner
c330069e20 Implement a couple of memcmp folds from the todo list 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23517 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 04:54:20 +00:00
Jeff Cohen
fef80f43e0 Silence VC++ redeclaration warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23516 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 01:59:49 +00:00
Chris Lattner
d3d2cf52bb Never rely on ReplaceAllUsesWith when selecting, use CodeGenMap instead. 
ReplaceAllUsesWith does not replace scalars SDOperand floating around on
the stack, permitting things to be selected multiple times.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23515 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-29 00:59:32 +00:00
Chris Lattner
79d0e9f3d1 Codegen ADD X, IMM -> addis/addi if needed. 
This implements PowerPC/fold-li.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23514 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 23:07:13 +00:00
Chris Lattner
d8ead9e250 Autogen MUL, move FP cases together 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23512 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:53:16 +00:00
Chris Lattner
88add100b3 disentangle FP from INT versions of div/mul 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23511 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:50:24 +00:00
Chris Lattner
4a7de219b4 Use the autogenerated matcher for ADD/SUB 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23510 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:47:28 +00:00
Chris Lattner
e025574370 add a patter for SUBFIC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23509 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:47:06 +00:00
Chris Lattner
0648ccf1e9 Mark int binops as int-only, add FP binops. Mark FADD/FMUL as commutative but 
not associative.  Add [SU]REM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23508 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:38:27 +00:00
Chris Lattner
bed21de39b wrap a long line 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23507 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:30:58 +00:00
Chris Lattner
615c2d0920 Add FP versions of the binary operators, keeping the int and fp worlds seperate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23506 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:29:58 +00:00
Chris Lattner
3e2bafd640 Add FP versions of the binary operators, keeping the int and fp worlds seperate. 
Though I have done extensive testing, it is possible that this will break
things in configs I can't test.  Please let me know if this causes a problem
and I'll fix it ASAP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23505 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:29:17 +00:00
Chris Lattner
01b3d73c20 Add FP versions of the binary operators, keeping the int and fp worlds seperate. 
Though I have done extensive testing, it is possible that this will break
things in configs I can't test.  Please let me know if this causes a problem
and I'll fix it ASAP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23504 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:28:18 +00:00
Chris Lattner
a5cac6f6eb Mark associative nodes as associative 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23503 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 20:58:39 +00:00
Chris Lattner
645992f595 Nate pointed out that mulh[us] are commutative as well. Thanks! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23500 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 19:01:44 +00:00
Chris Lattner
6bcf1b7eed expose commutativity information 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23498 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 18:27:58 +00:00
Chris Lattner
393e138f60 All (xor *) cases are autogenerated now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23497 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 18:12:37 +00:00
Chris Lattner
cfc828a3d0 add support for missed eqv tests 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23496 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 18:10:51 +00:00
Chris Lattner
1bd8b7b06e Implement PowerPC/eqv-andc-orc-nor.ll:EQV3 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23494 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 18:04:52 +00:00
Chris Lattner
91da8623be learn to codegen not as NOR instead of xoris/xori 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23490 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 17:13:15 +00:00
Chris Lattner
d135fa4fd6 These nodes are all autogenerated 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23489 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 17:07:09 +00:00
Chris Lattner
32643d8e05 Constant fold llvm.sqrt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23487 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 01:34:32 +00:00
Chris Lattner
5b3c70263b add a note about a way to improve this code further, that I won't be getting 
to right now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23485 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:44:59 +00:00
Chris Lattner
9a5582f251 Fix a regression in my previous patch, fixing GlobalOpt/2005-09-27-Crash.ll 
and PR632.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23484 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:28:11 +00:00
Chris Lattner
d145a61f8f Darwin, like many BSD systems, has a setjmp/longjmp which saves the signal mask 
on setjmp calls and restores it on longjmp calls (both of which require syscalls).

This makes the calls REALLY slow.  Use _setjmp/_longjmp instead.  This speeds up
hexxagon from 120.31s to 15.68s: from 5.53x slower than GCC to 28% faster than GCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23482 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:18:25 +00:00
Chris Lattner
6c38b33613 If the target prefers it, use _setjmp/_longjmp should be used instead of setjmp/longjmp for llvm.setjmp/llvm.longjmp. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23481 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:15:53 +00:00
Chris Lattner
8e6be8b921 initialize new flag 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23480 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 22:13:56 +00:00
Chris Lattner
4531371960 Avoid spilling stack slots... to stack slots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23478 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 21:33:12 +00:00
Chris Lattner
f4e6c3a69b Completely rewrite 'correct' eh support. This changes how setjmp insertion 
is performed so it is only at most once per function that contains an invoke
instead of once per invoke in the function.  This patch has the following perks:

1. It fixes PR631, which complains about slowness.
2. If fixes PR240, which complains about non-volatile vars being live across
   setjmp/longjmps.
3. It improves (but does not fix) the jmpbuf alignment issue on itanium by not
   forcing the jmpbufs to always be 8-bytes off the alignment of the structure.
4. It speeds up 253.perlbmk from 338s to 13.70s (a 25x improvement!), making us
   now about 4% faster than GCC.

Further improvements are also possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23477 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 21:18:17 +00:00
Chris Lattner
fe15830f96 Make the pass name simpler 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23476 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 21:10:32 +00:00
Chris Lattner
b94388a76a fix CBackend/2005-09-27-VolatileFuncPtr.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23475 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 20:52:44 +00:00
Chris Lattner
6d7277b3b4 allow demotion to volatile values, add support for invoke 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23473 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 19:39:00 +00:00
Chris Lattner
333bd835bd Make sure to clear the CodeGenMap after each basic block is selected to avoid 
cross MBB pollution.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23470 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 17:45:33 +00:00
Jim Laskey
5324fec644 Remove some redundancies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23469 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 17:32:45 +00:00
Chris Lattner
df0ef1d0fe Split SimpleConstantVal up into its components, so each Constant subclass getsa different enum value. This allows 'classof' for these to be really simple,not needing to call getType() anymore. 
This speeds up isa/dyncast/etc for constants, and also makes them smaller.
For example, the text section of a release build of InstCombine.cpp shrinks
from 230037 bytes to 216363 bytes, a 6% reduction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23467 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 06:09:08 +00:00
Chris Lattner
a9ec8ab32b Add support for external calls that we know how to constant fold. This implements 
ctor-list-opt.ll:CTOR8


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23465 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 05:02:43 +00:00
Chris Lattner
231308c545 Fix a bug where we would evaluate stores into linkonce objects which could be 
potentially replaced at link-time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23463 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 04:50:03 +00:00
Chris Lattner
cd27142cc8 Implement support for static constructors with calls in them. This is useful 
because gccas runs globalopt before inlining.

This implements ctor-list-opt.ll:CTOR7


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23462 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 04:45:34 +00:00
Chris Lattner
8a7cc6e71c Refactor this code a bit, no functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23460 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 04:27:01 +00:00
Chris Lattner
5e8d2dc197 Move the post-lsr simplify cfg pass after lowereh, so it can clean up after 
eh lowering as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23459 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-27 00:14:41 +00:00
Chris Lattner
30e21a46f0 minor pattern shuffling 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23458 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 22:20:16 +00:00
Jim Laskey
e6b90fba4a Addition of a simple two pass scheduler. This version is currently hacked up 
for testing and will require target machine info to do a proper scheduling.
The simple scheduler can be turned on using -sched=simple (defaults
to -sched=none)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23455 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 21:57:04 +00:00
Chris Lattner
ff0c1ef9eb Remove some dead code. ctor evaluation subsumes empty ctor elim 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23453 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 20:38:20 +00:00
Chris Lattner
a22fdb0a37 Add support for alloca, implementing ctor-list-opt.ll:CTOR6 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23452 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 17:07:09 +00:00
Chris Lattner
aae4a1cd3f Add a debug printout, fix a crash on kc++ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23450 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 07:34:35 +00:00
Chris Lattner
798b4d5bb3 Implement loads/stores through GEP's of globals. This implements 
ctor-list-opt.ll:CTOR5.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23449 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 06:52:44 +00:00
Chris Lattner
0b142e3920 Replace TraverseGEPInitializer with ConstantFoldLoadThroughGEPConstantExpr 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23447 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:34:07 +00:00
Chris Lattner
ebe61201d1 Eliminate GetGEPGlobalInitializer in favor of the more powerful 
ConstantFoldLoadThroughGEPConstantExpr function in the utils lib.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23446 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:28:52 +00:00
Chris Lattner
363f2a26d5 Factor the GetGEPGlobalInitializer out of this pass and into Transforms/Utils 
as ConstantFoldLoadThroughGEPConstantExpr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23445 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:28:06 +00:00
Chris Lattner
c5f52e6da1 Move the ConstantFoldLoadThroughGEPConstantExpr function out of the InstCombine 
pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23444 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:27:10 +00:00
Chris Lattner
562a055ca7 add a comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23442 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:16:34 +00:00
Chris Lattner
04de1cfb2b Add support for getelementptr, load, and correctly reject volatile stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23441 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 05:15:37 +00:00
Chris Lattner
cdf98bed96 Add support for br/brcond/switch and phi 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23439 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 04:57:38 +00:00
Chris Lattner
79c1101947 Add a simple interpreter to this code, allowing us to statically evaluate 
global ctors that are simple enough.  This implements ctor-list-opt.ll:CTOR2.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23437 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 04:44:35 +00:00
Chris Lattner
db973e60ce factor some code into a InstallGlobalCtors method, add comments. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23435 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 02:31:18 +00:00
Chris Lattner
7d8e58f384 Make the global opt optimizer work on modules with a null terminator, by 
accepting the null even with a non-65535 init prio


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23434 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 02:19:27 +00:00
Chris Lattner
b1ab458047 Factor this code out into a few methods. 
Implement the start of global ctor optimization.  It is currently smart
enough to remove the global ctor for cases like this:

struct foo {
  foo() {}
} x;

... saving a bit of startup time for the program.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23433 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-26 01:43:45 +00:00
Chris Lattner
aebac50e77 Fix some logic I broke that caused a regression on 
SimplifyLibCalls/2005-05-20-sprintf-crash.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23430 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-25 07:06:48 +00:00
Chris Lattner
5931c54e85 Move MaskedValueIsZero up. 
Match a bunch of idioms for sign extensions, implementing InstCombine/signext.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23428 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 23:43:33 +00:00
Chris Lattner
5d735bf29b Simplify this code a bit by relying on recursive simplification. Support 
sprintf("%s", P)'s that have uses.

s/hasNUses(0)/use_empty()/


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23425 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 22:17:06 +00:00
Chris Lattner
5b845c9443 Add support for a marker byte that indicates that we shouldn't add the user 
prefix to a symbol name


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23421 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 08:24:28 +00:00
Chris Lattner
ea874f3306 Teach the dag isel generator how to construct arbitrary immediates. The 
generated isel now tries li then lis, then lis+ori.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23418 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-24 00:41:58 +00:00
Chris Lattner
b60e0815df remove some debugging code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23411 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 18:49:09 +00:00
Chris Lattner
263d1e469d Fold two consequtive branches that share a common destination between them. 
This implements SimplifyCFG/branch-fold.ll, and is useful on ?:/min/max heavy
code


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23410 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 18:47:20 +00:00
Chris Lattner
055dc102e9 simplify some logic further 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23408 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 07:23:18 +00:00
Chris Lattner
f58c1a578e pull a bunch of logic out of SimplifyCFG into a helper fn 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23407 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 06:39:30 +00:00
Chris Lattner
7c439929bc speed up Archive::isBytecodeArchive in the case when the archive doesn't have 
an llvm-ranlib symtab.  This speeds up gccld -native on an almost empty .o file
from 1.63s to 0.18s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23406 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 06:22:58 +00:00
Chris Lattner
5ae7911b24 Turn (X^C1) == C2 into X == C1^C2 iff X&~C1 = 0 (and move a function) 
This happens all the time on PPC for bool values, e.g. eliminating a xori
in inverted-bool-compares.ll.

This should be added to the dag combiner as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23403 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-23 00:55:52 +00:00
Chris Lattner
3c3fe462f7 Expose the LiveInterval interfaces as public headers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23400 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-21 04:19:09 +00:00
Chris Lattner
e9487f0dc8 Start threading across blocks with code in them, so long as the code does 
not define a value that is used outside of it's block.  This catches many
more simplifications, e.g. 854 in 176.gcc, 137 in vpr, etc.

This implements branch-phi-thread.ll:test3.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23397 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-20 01:48:40 +00:00
Chris Lattner
2e42e36698 Implement merging of blocks with the same condition if the block has multiple 
predecessors.  This implements branch-phi-thread.ll::test1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23395 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-20 00:43:16 +00:00
Chris Lattner
9c88d98162 Reject a case we don't handle yet 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23393 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 23:57:04 +00:00
Chris Lattner
7e1ff8d2d9 remove debugging code :-/ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23392 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 23:50:15 +00:00
Chris Lattner
eaba3a194c Implement SimplifyCFG/branch-phi-thread.ll, the most trivial case of threading 
control across branches with determined outcomes.  More generality to follow.
This triggers a couple thousand times in specint.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23391 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 23:49:37 +00:00
Nate Begeman
44728a7bb6 Stub out the rest of the DAG Combiner. Just need to fill in the 
select_cc bits and then wrap it in a convenience function for  use with
regular select.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23389 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 22:34:01 +00:00
Chris Lattner
cea8688ee4 Teach the local spiller to turn stack slot loads into register-register copies 
when possible, avoiding the load (and avoiding the copy if the value is already
in the right register).

This patch came about when I noticed code like the following being generated:

  store R17 -> [SS1]
  ...blah...
  R4 = load [SS1]

This was causing an LSU reject on the G5.  This problem was due to the register
allocator folding spill code into a reg-reg copy (producing the load), which
prevented the spiller from being able to rewrite the load into a copy, despite
the fact that the value was already available in a register.  In the case
above, we now rip out the R4 load and replace it with a R4 = R17 copy.

This speeds up several programs on X86 (which spills a lot :) ), e.g.
smg2k from 22.39->20.60s, povray from 12.93->12.66s, 168.wupwise from
68.54->53.83s (!), 197.parser from 7.33->6.62s (!), etc.  This may have a larger
impact in some cases on the G5 (by avoiding LSU rejects), though it probably
won't trigger as often (less spilling in general).

Targets that implement folding of loads/stores into copies should implement
the isLoadFromStackSlot hook to get this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23388 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 06:56:21 +00:00
Chris Lattner
a92aab74dd Implement the isLoadFromStackSlot interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23387 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 05:23:44 +00:00
Chris Lattner
7203e158da Refactor this code a bit and make it more general. This now compiles: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus2 (unsigned int x) { b.j += x; }

To:

_plus2:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        slwi r3, r3, 6
        add r3, r4, r3
        rlwimi r3, r4, 0, 26, 14
        stw r3, 0(r2)
        blr


instead of:

_plus2:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        rlwinm r5, r4, 26, 21, 31
        add r3, r5, r3
        rlwimi r4, r3, 6, 15, 25
        stw r4, 0(r2)
        blr

by eliminating an 'and'.

I'm pretty sure this is as small as we can go :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23386 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 07:22:02 +00:00
Chris Lattner
150f12af7f Compile 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus2 (unsigned int x) {
  b.j += x;
}

to:

plus2:
        mov %EAX, DWORD PTR [b]
        mov %ECX, %EAX
        and %ECX, 131008
        mov %EDX, DWORD PTR [%ESP + 4]
        shl %EDX, 6
        add %EDX, %ECX
        and %EDX, 131008
        and %EAX, -131009
        or %EDX, %EAX
        mov DWORD PTR [b], %EDX
        ret

instead of:

plus2:
        mov %EAX, DWORD PTR [b]
        mov %ECX, %EAX
        shr %ECX, 6
        and %ECX, 2047
        add %ECX, DWORD PTR [%ESP + 4]
        shl %ECX, 6
        and %ECX, 131008
        and %EAX, -131009
        or %ECX, %EAX
        mov DWORD PTR [b], %ECX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23385 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 06:30:59 +00:00
Chris Lattner
0b7c0bf249 Generalize this transform, using MaskedValueIsZero, allowing us to compile: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus3 (unsigned int x) { b.k += x; }

To:

plus3:
        mov %EAX, DWORD PTR [%ESP + 4]
        shl %EAX, 17
        add DWORD PTR [b], %EAX
        ret

instead of:

plus3:
        mov %EAX, DWORD PTR [%ESP + 4]
        shl %EAX, 17
        mov %ECX, DWORD PTR [b]
        add %EAX, %ECX
        and %EAX, -131072
        and %ECX, 131071
        or %ECX, %EAX
        mov DWORD PTR [b], %ECX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23384 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 06:02:59 +00:00
Chris Lattner
5aa7666ebe fix typeo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23383 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 05:25:20 +00:00
Chris Lattner
0d947ea943 Remove unintentionally committed code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23382 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 05:12:51 +00:00
Chris Lattner
11021cb988 implement shift.ll:test25. This compiles: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus3 (unsigned int x) {
  b.k += x;
}

to:

_plus3:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r3, 0(r2)
        rlwinm r4, r3, 0, 0, 14
        add r4, r4, r3
        rlwimi r4, r3, 0, 15, 31
        stw r4, 0(r2)
        blr

instead of:

_plus3:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        srwi r5, r4, 17
        add r3, r5, r3
        slwi r3, r3, 17
        rlwimi r3, r4, 0, 15, 31
        stw r3, 0(r2)
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23381 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 05:12:10 +00:00
Chris Lattner
c8e7756791 Implement add.ll:test29. Codegening: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus1 (unsigned int x) {
  b.i += x;
}

as:
_plus1:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        add r3, r4, r3
        rlwimi r3, r4, 0, 0, 25
        stw r3, 0(r2)
        blr

instead of:

_plus1:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        rlwinm r5, r4, 0, 26, 31
        add r3, r5, r3
        rlwimi r3, r4, 0, 0, 25
        stw r3, 0(r2)
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23379 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 04:24:45 +00:00
Chris Lattner
3255bd101d remove debug output 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23377 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 03:50:25 +00:00
Chris Lattner
e9bed7d107 Implement or.ll:test21. This teaches instcombine to be able to turn this: 
struct {
   unsigned int bit0:1;
   unsigned int ubyte:31;
} sdata;

void foo() {
  sdata.ubyte++;
}

into this:

foo:
        add DWORD PTR [sdata], 2
        ret

instead of this:

foo:
        mov %EAX, DWORD PTR [sdata]
        mov %ECX, %EAX
        add %ECX, 2
        and %ECX, -2
        and %EAX, 1
        or %EAX, %ECX
        mov DWORD PTR [sdata], %EAX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23376 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-18 03:42:07 +00:00
Chris Lattner
6a78c2157a Implement hook for ppc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23374 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-17 01:03:26 +00:00
Nate Begeman
452d7bebaa More DAG combining. Still need the branch instructions, and select_cc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23371 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-16 00:54:12 +00:00
Chris Lattner
4ac85b3e94 disable this for now 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23366 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-15 21:44:00 +00:00
Chris Lattner
2e3f5db9ff Give all operands names 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23357 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 21:11:13 +00:00
Chris Lattner
43ef1318c6 give all operands names 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23356 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 21:10:24 +00:00
Chris Lattner
4345a4a452 Fix some issues exposed by more testing. XORIS had the wrong operands 
specified.  The various *imm operands defined by PPC are really all i32,
even though the actual immediate is restricted to a smaller value in it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23352 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 20:53:05 +00:00
Chris Lattner
c36d065dce Fix some bugs noticed by new checking code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23350 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 18:18:39 +00:00
Chris Lattner
6e2f843114 Fix the regression last night compiling povray 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23348 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 17:32:56 +00:00
Chris Lattner
3452d23c34 fix a major regression from my patch this afternoon 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23347 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 06:06:45 +00:00
Chris Lattner
303b555164 we don't need this proto any longer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23342 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 22:05:21 +00:00
Chris Lattner
af16538511 move the #include for the generated code into the isel class body so we 
can use/define class methods


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23339 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 22:03:06 +00:00
Chris Lattner
7b738342f0 Change the arg lowering code to use copyfromreg from vregs associated 
with incoming arguments instead of the pregs themselves.  This fixes
the scheduler from causing problems by moving a copyfromreg for an argument
to after a select_cc node (now it can, and bad things won't happen).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23334 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:33:40 +00:00
Chris Lattner
8c4469840e This has been moved to the target-indep code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23333 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:32:18 +00:00
Chris Lattner
82da52299c This code is no longer needed, it is moved to the target-indep code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23332 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:31:44 +00:00
Chris Lattner
fa57702388 If a function has liveins, and if the target requested that they be plopped 
into particular vregs, emit copies into the entry MBB.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23331 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:30:54 +00:00
Chris Lattner
f2cded73c4 Majik numbers are bad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23330 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:03:13 +00:00
Chris Lattner
31262ce53d Remove some dead vectors 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23329 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 18:47:49 +00:00
Chris Lattner
7835cdde40 Add a simple xform to simplify array accesses with casts in the way. 
This is useful for 178.galgel where resolution of dope vectors (by the
optimizer) causes the scales to become apparent.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23328 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 18:36:04 +00:00
Chris Lattner
396b2baf3c Fix an issue where LSR would miss rewriting a use of an IV expression by a PHI node that is not the original PHI. 
This fixes up a dot-product loop in galgel, speeding it up from 18.47s to
16.13s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23327 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 02:09:55 +00:00
Chris Lattner
eed48275a1 Add a helper function, allowing us to simplify some code a bit, changing 
indentation, no functionality change


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23325 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 00:40:14 +00:00
Chris Lattner
408902b3c4 Implement a simple xform to turn code like this: 
if () { store A -> P; } else { store B -> P; }

into a PHI node with one store, in the most trival case.  This implements
load.ll:test10.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23324 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 23:23:25 +00:00
Chris Lattner
9c1f0fd8de Another load-peephole optimization: do gcse when two loads are next to 
each other.  This implements InstCombine/load.ll:test9


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23322 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 22:21:03 +00:00
Chris Lattner
62f254df04 Implement a trivial form of store->load forwarding where the store and the 
load are exactly consequtive.  This is picked up by other passes, but this
triggers thousands of times in fortran programs that use static locals
(and is thus a compile-time speedup).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23320 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 22:00:15 +00:00
Chris Lattner
12b50410cd Fix a regression from last night, which caused this pass to create invalid 
code for IV uses outside of loops that are not dominated by the latch block.
We should only convert these uses to use the post-inc value if they ARE
dominated by the latch block.

Also use a new LoopInfo method to simplify some code.

This fixes Transforms/LoopStrengthReduce/2005-09-12-UsesOutOutsideOfLoop.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23318 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 17:11:27 +00:00
Chris Lattner
b6a69e70e0 Add a new getLoopLatch() method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23315 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 17:03:55 +00:00
Chris Lattner
c6bae65b49 _test: 
li r2, 0
LBB_test_1:     ; no_exit.2
        li r5, 0
        stw r5, 0(r3)
        addi r2, r2, 1
        addi r3, r3, 4
        cmpwi cr0, r2, 701
        blt cr0, LBB_test_1     ; no_exit.2
LBB_test_2:     ; loopexit.2.loopexit
        addi r2, r2, 1
        stw r2, 0(r4)
        blr
[zion ~/llvm]$ cat > ~/xx
Uses of IV's outside of the loop should use hte post-incremented version
of the IV, not the preincremented version.  This helps many loops (e.g. in sixtrack)
which used to generate code like this (this is the code from the
dont-hoist-simple-loop-constants.ll testcase):

_test:
        li r2, 0                 **** IV starts at 0
LBB_test_1:     ; no_exit.2
        or r5, r2, r2            **** Copy for loop exit
        li r2, 0
        stw r2, 0(r3)
        addi r3, r3, 4
        addi r2, r5, 1
        addi r6, r5, 2           **** IV+2
        cmpwi cr0, r6, 701
        blt cr0, LBB_test_1     ; no_exit.2
LBB_test_2:     ; loopexit.2.loopexit
        addi r2, r5, 2       ****  IV+2
        stw r2, 0(r4)
        blr

And now generated code like this:

_test:
        li r2, 1               *** IV starts at 1
LBB_test_1:     ; no_exit.2
        li r5, 0
        stw r5, 0(r3)
        addi r2, r2, 1
        addi r3, r3, 4
        cmpwi cr0, r2, 701     *** IV.postinc + 0
        blt cr0, LBB_test_1
LBB_test_2:     ; loopexit.2.loopexit
        stw r2, 0(r4)          *** IV.postinc + 0
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23313 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-12 06:04:47 +00:00
Chris Lattner
7259df3ab8 implement Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll. 
We used to emit this code for it:

_test:
        li r2, 1     ;; Value tying up a register for the whole loop
        li r5, 0
LBB_test_1:     ; no_exit.2
        or r6, r5, r5
        li r5, 0
        stw r5, 0(r3)
        addi r5, r6, 1
        addi r3, r3, 4
        add r7, r2, r5  ;; should be addi r7, r5, 1
        cmpwi cr0, r7, 701
        blt cr0, LBB_test_1     ; no_exit.2
LBB_test_2:     ; loopexit.2.loopexit
        addi r2, r6, 2
        stw r2, 0(r4)
        blr

now we emit this:

_test:
        li r2, 0
LBB_test_1:     ; no_exit.2
        or r5, r2, r2
        li r2, 0
        stw r2, 0(r3)
        addi r3, r3, 4
        addi r2, r5, 1
        addi r6, r5, 2   ;; whoa, fold those adds!
        cmpwi cr0, r6, 701
        blt cr0, LBB_test_1     ; no_exit.2
LBB_test_2:     ; loopexit.2.loopexit
        addi r2, r5, 2
        stw r2, 0(r4)
        blr

more improvement coming.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23306 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-10 01:18:45 +00:00
Chris Lattner
e6ec9f20c9 PowerPC cannot truncstore i1 natively 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23304 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-10 00:21:06 +00:00
Chris Lattner
13d58e71b7 Allow targets to say they don't support truncstore i1 (which includes a mask 
when storing to an 8-bit memory location), as most don't.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23303 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-10 00:20:18 +00:00
Chris Lattner
a500fc681d Add a missing #include, patch courtesy of Baptiste Lepilleur. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23302 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 23:53:39 +00:00
Chris Lattner
3ec5d74fc5 Fix a problem duraid encountered on itanium where this folding: 
select (x < y), 1, 0 -> (x < y) incorrectly: the setcc returns i1 but the
select returned i32.  Add the zero extend as needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23301 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 23:00:07 +00:00
Chris Lattner
08addbd477 Fix a crash viewing dags that have target nodes in them 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23300 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 22:35:03 +00:00
Chris Lattner
c9fe7508a5 I forgot that we always spill fp values as 64-bits. Implement spill folding 
for FP as well.  This triggers a couple dozen times on 177.mesa (for example).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23299 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 21:59:44 +00:00
Chris Lattner
f38df04c3a Fix a problem that Nate noticed, where spill code was not getting coallesced 
with copies, leading to code like this:

       lwz r4, 380(r1)
       or r10, r4, r4    ;; Last use of r4

By teaching the PPC backend how to fold spills into copies, we now get this
code:

       lwz r10, 380(r1)

wow. :)

This reduces a testcase nate sent me from 1505 instructions to 1484.

Note that this could handle FP values but doesn't currently, for reasons
mentioned in the patch


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23298 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 21:46:49 +00:00
Chris Lattner
1463019e84 code cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23297 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 20:51:08 +00:00
Chris Lattner
50ea01ed5b Use continue in the use-processing loop to make it clear what the early exits 
are, simplify logic, and cause things to not be nested as deeply.  This also
uses MRI->areAliases instead of an explicit loop.

No functionality change, just code cleanup.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23296 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 20:29:51 +00:00
Nate Begeman
39ee1ac7e5 Last round of 2-node folds from SD.cpp. Will move on to 3 node ops such 
as setcc and select next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23295 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 19:49:52 +00:00
Chris Lattner
ceb0a52231 remove debugging code *slaps head* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23294 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 19:19:20 +00:00
Chris Lattner
b11443dc84 When spilling a live range that is used multiple times by one instruction, 
only add a reload live range once for the instruction.  This is one step
towards fixing a regalloc pessimization that Nate notice, but is later undone
by the spiller (so no code is changed).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23293 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 19:17:47 +00:00
Chris Lattner
043870dd85 Teach the code generator that rlwimi is commutable if the rotate amount 
is zero.  This lets the register allocator elide some copies in some cases.

This implements CodeGen/PowerPC/rlwimi-commute.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23292 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 18:17:41 +00:00
Chris Lattner
2eb2517fbe Introduce two new concepts: 
1. Add support for defining Pattern's, which can match expressions when there
   is no instruction that directly implements something.  Instructions usually
   implicitly define patterns.
2. Add support for defining SDNodeXForm's, which are node transformations.
   This seperates the concept of a node xform out from the existing predicate
   support.

Using this new stuff, we add a few instruction patterns, one for testing, and
two for OR/XOR by an arbitrary immediate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23286 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-09 00:39:56 +00:00
Chris Lattner
b85c64c4d8 whitespace/comment changes, no functionality diffs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23283 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 23:17:26 +00:00
Nate Begeman
223df2269d Move yet more folds over to the dag combiner from sd.cpp 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23278 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 20:18:10 +00:00
Chris Lattner
47f01f1b44 Add a bunch of stuff needed for node type inference. Move 'BLR' down with 
the rest of the instructions, add comment markers to seperate portions of
the file into logical parts


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23277 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 19:50:41 +00:00
Chris Lattner
bfde080ce0 add patterns for x?oris? 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23268 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 17:40:49 +00:00
Chris Lattner
3e63ead49b add patterns to the addi/addis/mulli etc instructions. Define predicates 
for matching signed 16-bit and shifted 16-bit ppc immediates


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23267 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 17:33:10 +00:00
Chris Lattner
d1cdc7028c Add patterns for some new instructions, allowing the use of the ineg fragment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23266 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-08 17:01:54 +00:00
Chris Lattner
8c65344a15 ignore generated files 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23263 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 23:47:44 +00:00
Chris Lattner
19c0907ba1 Remove some cases handled by the generated portion of the isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23262 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 23:45:15 +00:00
Nate Begeman
9980119270 Another round of dag combiner changes. This fixes some missing XOR folds 
as well as fixing how we replace old values with new values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23260 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 23:25:52 +00:00
Chris Lattner
dc6e2e0a5f Fix a bug that Tzu-Chien Chiu noticed: live interval analysis does NOT 
preserve livevar


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23259 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 17:34:39 +00:00
Nate Begeman
f89d78d7c7 Implement a common missing fold, (add (add x, c1), c2) -> (add x, c1+c2). 
This restores all of stanford to being identical with and without the dag
combiner with the add folding turned off in sd.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23258 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 16:09:19 +00:00
Chris Lattner
c98d823649 On non-apple systems, when using -march=ppc32, do not print: 
'' is not a recognized processor for this target (ignoring processor)

Default to "generic" instead of "" for the default CPU.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23257 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 05:45:33 +00:00
Chris Lattner
3eb3369a25 Print: 
'' is not a recognized processor for this target (ignoring processor)

instead of:

 is not a recognized processor for this target (ignoring processor)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23256 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 05:44:14 +00:00
Chris Lattner
1e111c7bbb Fix a bug nate ran into with replacealluseswith. In the recursive cse case, 
we were losing a node, causing an assertion to fail.  Now we eagerly delete
discovered CSE's, and provide an optional vector to keep track of these
discovered equivalences.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23255 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 05:37:01 +00:00
Nate Begeman
2300f55046 Add an option to the DAG Combiner to enable it for beta runs, and turn on 
that option for PowerPC's beta.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23253 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-07 00:15:36 +00:00
Nate Begeman
c09eeec0eb Implement i64<->fp using the fctidz/fcfid instructions on PowerPC when we 
are allowed to generate 64-bit-only PowerPC instructions for 32 bit hosts,
such as the PowerPC 970.

This speeds up 189.lucas from 81.99 to 32.64 seconds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23250 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 22:03:27 +00:00
Andrew Lenharth
46a776e664 Fix up the AssertXext problem, as well as adding it at calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23246 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 17:00:23 +00:00
Nate Begeman
92cce90c66 Add note about future optimization noted in the ppc compiler writer's guide 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23245 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 15:30:48 +00:00
Nate Begeman
d401dff796 Add accessor for 64bit flag, so that we can tell when it is safe to 
generate the fun in-register fp<->long instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23244 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 15:30:12 +00:00
Nate Begeman
83e75ecd27 Next round of DAGCombiner changes. This version now passes all the tests 
I have run so far when run before Legalize.  It still needs to pick up the
SetCC folds, and nodes that use SetCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23243 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 04:43:02 +00:00
Andrew Lenharth
f71df33671 revert part of the last change, should fix regressions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23241 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-04 06:12:19 +00:00
Chris Lattner
e147ceb2fa explicitly specify an operands list for patterns with inputs (e.g. neg) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23240 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:28:40 +00:00
Chris Lattner
6cd40d5888 include the dag isel fragment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23239 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:17:22 +00:00
Chris Lattner
bb38b6f8c0 ask for a dag isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23238 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:15:41 +00:00
Chris Lattner
6a8a21ced4 Fix a checking failure in gs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23235 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 01:04:40 +00:00
Chris Lattner
25dae727f3 Change the isel to not break out of the big giant switch. Instead, the 
switch should never be exited, so its bottom is now unreachable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23234 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 00:53:47 +00:00
Chris Lattner
7cd09cf942 rearrange logical ops to group them together more consistently. 
Define the PatFrag class which can be used to define subpatterns to match
things with.  Define 'not', and use it to define the patterns for andc,
nand, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23233 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-03 00:21:51 +00:00
Chris Lattner
6159fb20c2 Add AND/OR/XOR 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23232 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 22:35:53 +00:00
Nate Begeman
646d7e2727 Next round of DAG Combiner changes. Just need to support multiple return 
values, and then we should be able to hook it up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23231 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 21:18:40 +00:00
Chris Lattner
218a15d02c Add some initial patterns to simple binary instructions, though they 
currently don't do anything.  This elides patterns for binary operators
that ping on the carry flag, since we don't model it yet.

This patch also removes PPC::SUB, because it is dead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23230 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 21:18:00 +00:00
Chris Lattner
6fdcb250d5 Clean up some code from the last checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23229 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 20:32:45 +00:00
Chris Lattner
99c25b86aa Fix a bug in legalize where it would emit two calls to libcalls that return 
i64 values on targets that need that expanded to 32-bit registers.  This fixes
PowerPC/2005-09-02-LegalizeDuplicatesCalls.ll and speeds up 189.lucas from
taking 122.72s to 81.96s on my desktop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23228 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 20:26:58 +00:00
Chris Lattner
73e37c35be turn on dag isel by default 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23226 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:53:54 +00:00
Chris Lattner
70b9b1098a Make sure to auto-cse nullary ops 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23224 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:36:17 +00:00
Jim Laskey
839615a510 Add help support for -mcpu and -mattr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23222 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:27:43 +00:00
Chris Lattner
6621e3b963 Fix some buggy logic where we would try to remove nodes with two operands 
from the binary ops map, even if they had multiple results.  This latent bug
caused a few failures with the dag isel last night.

To prevent stuff like this from happening in the future, add some really
strict checking to make sure that the CSE maps always match up with reality!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23221 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 19:15:44 +00:00
Andrew Lenharth
aa38ce436b Pull out Lowering in preperation for multiple ISels. Oh, and get rid of some stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23220 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 18:46:02 +00:00
Chris Lattner
fd88f64934 Don't create zero sized stack objects even for array allocas with a zero 
number of elements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23219 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 18:41:28 +00:00
Chris Lattner
1e9de3ed2d Decouple fsqrt from gpul optimizations, implementing fsqrt.ll. 
Remove the -enable-gpopt option which is subsumed by feature flags.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23218 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 18:33:05 +00:00
Chris Lattner
a639a43602 Fix the release build, noticed by Eric van Riet Paap 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23215 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 07:09:28 +00:00
Chris Lattner
7b4ad94282 Fix a problem that Dan Berlin noticed, where reassociation would not succeed 
in building maximal expressions before simplifying them.  In particular, i
cases like this:

X-(A+B+X)

the code would consider A+B+X to be a maximal expression (not understanding
that the single use '-' would be turned into a + later), simplify it (a noop)
then later get simplified again.

Each of these simplify steps is where the cost of reassociation comes from,
so this patch should speed up the already fast pass a bit.

Thanks to Dan for noticing this!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23214 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 07:07:58 +00:00
Chris Lattner
2cd85da3ed Avoid creating garbage instructions, just move the old add instruction 
to where we need it when converting -(A+B+C) -> -A + -B + -C.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23213 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 06:38:04 +00:00
Chris Lattner
368a3aabb2 add some assertions and fix problems where reassociate could access the 
Ops vector out of range


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23211 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 05:23:22 +00:00
Jeff Cohen
7cd57f4c45 Fix VC++ build errors 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23210 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 02:51:42 +00:00
Chris Lattner
f505949580 Restore this patch now that the latent bug has been fixed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23209 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 01:24:55 +00:00
Chris Lattner
08951a32fb Make sure to legalize assert[zs]ext's operand correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23208 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 01:15:01 +00:00
Chris Lattner
5b3224fe7e Revert the previous patch which causes a mysterious regression in toast. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23207 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:47:05 +00:00
Chris Lattner
5ab6f5fe66 Teach live intervals to not crash on dead livein regs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23206 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:20:32 +00:00
Chris Lattner
fab08875b7 For values that are live across basic blocks and need promotion, use ANY_EXTEND 
instead of ZERO_EXTEND to eliminate extraneous extensions.  This eliminates
dead zero extensions on formal arguments and other cases on PPC, implementing
the newly tightened up test/Regression/CodeGen/PowerPC/small-arguments.ll test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23205 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:19:37 +00:00
Chris Lattner
13c78e2e5f legalize ANY_EXTEND appropriately 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23204 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:18:10 +00:00
Chris Lattner
4ed11b4b79 Add support for ANY_EXTEND and add a few minor folds for it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23203 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:17:32 +00:00
Chris Lattner
fb8b8a75ff Handle any_extend like zext 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23202 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:16:09 +00:00
Chris Lattner
26e04bbf77 Handle ANY_EXTEND like ZERO_EXTEND. Simplify the extend/truncate code on 
the observation that it only has to handle i1 -> i64 and i64 -> i1.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23201 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:15:30 +00:00
Chris Lattner
2a00daac58 Implement small-arguments.ll:test3 by teaching the DAG optimizer that 
the results of calls to functions returning small values are properly
sign/zero extended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23198 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:44:32 +00:00
Nate Begeman
39f60a2302 Fix some code in the current node combining code, spotted when it was moved 
over to DAGCombiner.cpp

1. Don't assume that SetCC returns i1 when folding (xor (setcc) constant)
2. Don't duplicate code in folding AND with AssertZext that is handled by
   MaskedValueIsZero


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23196 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:25:49 +00:00
Nate Begeman
4ebd805c6a Implement first round of feedback from chris (there's still a couple things 
left to do).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23195 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:24:04 +00:00
Chris Lattner
2b8ad8e55a Align functions to 16-byte boundaries, to eliminate noise in performance measurements. This improves the performance of 'treeadd' by about 20% with the dag 
isel, restoring it to the pattern-isel level (which happens to get the alignment right).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23194 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 23:08:50 +00:00
Chris Lattner
a82f7b2be0 Local labels on darwin apparently start with just 'L', not .L like other 
platforms.  This reduces executable size and makes shark realize the actual
bounds of functions instead of showing each MBB as a function :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23193 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:48:35 +00:00
Jim Laskey
b1e1180ca0 1. Use SubtargetFeatures in llc/lli. 
2. Propagate feature "string" to all targets.

3. Implement use of SubtargetFeatures in PowerPCTargetSubtarget.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23192 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:38:21 +00:00
Jim Laskey
b3302db18a This new class provides support for platform specific "features". The intent 
is to manage processor specific attributes from the command line.  See examples
of use in llc/lli and PowerPCTargetSubtarget.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23191 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:36:18 +00:00
Chris Lattner
75592e4137 Implement dynamic allocas correctly. In particular, because we were copying 
directly out of R1 (without using a CopyFromReg, which uses a chain), multiple
allocas were getting CSE'd together, producing bogus code.  For this:

int %foo(bool %X, int %A, int %B) {
        br bool %X, label %T, label %F
F:
        %G = alloca int
        %H = alloca int
        store int %A, int* %G
        store int %B, int* %H
        %R = load int* %G
        ret int %R
T:
        ret int 0
}

We were generating:

_foo:
        stwu r1, -16(r1)
        stw r31, 4(r1)
        or r31, r1, r1
        stw r1, 12(r31)
        cmpwi cr0, r3, 0
        bne cr0, .LBB_foo_2     ; T
.LBB_foo_1:     ; F
        li r2, 16
        subf r2, r2, r1   ;; One alloca
        or r1, r2, r2
        or r3, r1, r1
        or r1, r2, r2
        or r2, r1, r1
        stw r4, 0(r3)
        stw r5, 0(r2)
        lwz r3, 0(r3)
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr
.LBB_foo_2:     ; T
        li r3, 0
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr

Now we generate:

_foo:
        stwu r1, -16(r1)
        stw r31, 4(r1)
        or r31, r1, r1
        stw r1, 12(r31)
        cmpwi cr0, r3, 0
        bne cr0, .LBB_foo_2     ; T
.LBB_foo_1:     ; F
        or r2, r1, r1
        li r3, 16
        subf r2, r3, r2  ;; Alloca 1
        or r1, r2, r2
        or r2, r1, r1
        or r6, r1, r1
        subf r3, r3, r6  ;; Alloca 2
        or r1, r3, r3
        or r3, r1, r1
        stw r4, 0(r2)
        stw r5, 0(r3)
        lwz r3, 0(r2)
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr
.LBB_foo_2:     ; T
        li r3, 0
        lwz r1, 12(r31)
        lwz r31, 4(r31)
        lwz r1, 0(r1)
        blr

This fixes Povray and SPASS with the dag isel, the last two failing cases.
Tommorow we will hopefully turn it on by default! :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23190 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:31:30 +00:00
Chris Lattner
393ecd6d2d Fix a bug where we were useing HA to get the high part, which seems like it 
could cause a miscompile.  Fixing this didn't fix the two programs that fail
though.  :(

This also changes the implementation to follow the pattern selector more
closely, causing us to select 0 to li instead of lis.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23189 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 19:38:28 +00:00
Chris Lattner
50ff55c2c7 Do not select the operands being passed into SelectCC. IT does this itself 
and selecting early prevents folding immediates into the cmpw* instructions


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23188 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 19:20:44 +00:00
Chris Lattner
da8abb0239 It is NDEBUG not _NDEBUG 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23186 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 18:44:10 +00:00
Nate Begeman
4942a9687d Add the rest of the currently implemented visit routines to the switch 
statement in visit().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23185 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 00:33:32 +00:00
Nate Begeman
1d4d414111 First pass at the DAG Combiner. It isn't used anywhere yet, but it should 
be mostly functional.  It currently has all folds from SelectionDAG.cpp
that do not involve a condition code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23184 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 00:19:25 +00:00
Chris Lattner
a1f68ca94e If a function has live ins/outs, print them 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23181 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 22:34:59 +00:00
Chris Lattner
f76053269e Move FCTIWZ handling out of the instruction selectors and into legalization, 
getting them out of the business of making stack slots.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23180 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 21:09:52 +00:00
Chris Lattner
8346bb6c29 Remove dead code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23179 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 20:25:15 +00:00
Chris Lattner
bc11c3482c Move SHL,SHR i64 -> legalizer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23178 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 20:23:54 +00:00
Chris Lattner
c22af9e5df Remove code that is now dead from the pattern isel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23177 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 19:11:36 +00:00
Chris Lattner
eb9b62e35e lower sra_parts on the dag, implementing it for the dag isel, and exposing 
the ops to dag optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23176 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 19:09:57 +00:00
Chris Lattner
50ec897904 Allow targets to custom expand shifts that are too large for their registers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23173 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 19:01:53 +00:00
Chris Lattner
99296ffd36 add assert zext/sext to the dag isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23171 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 18:08:46 +00:00
Chris Lattner
5dd7fea3f2 Handle AssertSext/AssertZext nodes, fixing the regressions last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23170 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 17:48:04 +00:00
Jeff Cohen
7383ce4127 Fix VC++ precedence warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23169 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 02:47:06 +00:00
Nate Begeman
49296f1f48 Enable generation of AssertSext and AssertZext in the PPC backend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23168 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 01:58:39 +00:00
Chris Lattner
7a49fdcd11 Fix 'ret long' to return the high and lo parts in the right registers. This 
fixes crafty and probably others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23167 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 01:34:29 +00:00
Nate Begeman
fe75a2836a Sigh, not my day. Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23166 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:43:49 +00:00
Nate Begeman
9f52f2838d Fix a mistake in my previous patch pointed out by sabre; the AssertZext 
case in MaskedValueIsZero was wrong.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23165 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:43:08 +00:00
Nate Begeman
b85dfab889 Remove some unnecessary casts, and add the AssertZext case to 
MaskedValueIsZero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23164 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-31 00:27:53 +00:00
Chris Lattner
eb80fe8ff6 now that physregs can exist in the same dag with multiple types, remove some 
ugly hacks


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23162 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 22:59:48 +00:00
Chris Lattner
0fdd768094 Allow physregs to occur in the dag with multiple types. Though I don't likethis, it is a requirement on PPC, which can have an f32 value in r3 at onepoint in a function and a f64 value in r3 at another point. :( 
This fixes compilation of mesa


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23161 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 22:38:38 +00:00
Chris Lattner
2ea0c66ae5 Fix type mismatches when passing f32 values to calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23159 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 21:28:19 +00:00
Chris Lattner
e836ad6736 When checking the fixed intervals, don't forget to check for register aliases. 
This fixes PR621 and Regression/CodeGen/X86/2005-08-30-RegAllocAliasProblem.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23158 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 21:03:36 +00:00
Chris Lattner
1368721d53 Fix some indentation (first hunks). 
Remove code (last hunk) that miscompiled immediate and's, such as
  and uint %tmp.30, 4294958079

into

 andi. r8, r8, 56319
 andis. r8, r8, 65535

instead of:

 li r9, -9217
 and r8, r8, r9

The first always generates zero.

This fixes espresso.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23155 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 18:37:48 +00:00
Chris Lattner
b551ba7661 Fix a problem Nate found where we swapped the operands of SHL/SHR_PARTS. This 
fixes fourinarow


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23153 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 17:42:59 +00:00
Chris Lattner
14b86c72a2 codegen ADD_PARTS correctly: put the results in the right registers! This 
fixes fhourstones


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23152 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 17:40:13 +00:00
Chris Lattner
cc0675a4be Fix FreeBench/fourinarow with the dag isel, by not adding a bogus result 
to SHIFT_PARTS nodes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23151 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 17:21:17 +00:00
Chris Lattner
2501d5e29c add operands in the right order, fixing McCat/18-imp with the dag isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23150 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 17:13:58 +00:00
Chris Lattner
ec176e30d6 Fix a miscompile of PtrDist/bc. Sign extending bools is not the right thing, 
at least tends to expose problems elsewhere.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23149 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 16:56:19 +00:00
Nate Begeman
5ffcd9b56c Remove a bogus piece of my AssertSext/AssertZext patch. oops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23148 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-30 02:54:28 +00:00