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Author SHA1 Message Date
Chris Lattner
842436586c add some new instructions to the classifier. With this, we correctly insert 
a nop into Freebench/neural, which speeds it up from 136->129s (~5.4%).

llvm-svn: 26590
 2006-03-07 07:14:55 +00:00
Chris Lattner
0cd4bd574c add some comments that describe what we model 
llvm-svn: 26588
 2006-03-07 06:44:19 +00:00
Chris Lattner
4cd6cd499d Implement a very very simple hazard recognizer for LSU rejects and ctr set/read 
flushes

llvm-svn: 26587
 2006-03-07 06:32:48 +00:00
Chris Lattner
ced780efee Fix some formatting, when looking for hazards, prefer target nodes over 
things like copyfromreg.

llvm-svn: 26586
 2006-03-07 05:40:43 +00:00
Chris Lattner
ae34bbf56b add a note 
llvm-svn: 26585
 2006-03-07 04:42:59 +00:00
Jeff Cohen
65b7db8bfd Keep VC++ building. 
llvm-svn: 26584
 2006-03-07 02:58:13 +00:00
Chris Lattner
174768dde0 add a note 
llvm-svn: 26583
 2006-03-07 02:46:26 +00:00
Evan Cheng
03940bfcfe - Emit subsections_via_symbols for Darwin. 
- Conditionalize Dwarf debugging output (Darwin only for now).

llvm-svn: 26582
 2006-03-07 02:23:26 +00:00
Evan Cheng
2327759419 Enable Dwarf debugging info. 
llvm-svn: 26581
 2006-03-07 02:02:57 +00:00
Chris Lattner
8a548b3e7d Teach the alignment handling code to look through constant expr casts and GEPs 
llvm-svn: 26580
 2006-03-07 01:28:57 +00:00
Chris Lattner
d12bd272d3 new regression test 
llvm-svn: 26579
 2006-03-06 23:52:37 +00:00
Chris Lattner
58fe521b5b Teach instcombine to increase the alignment of memset/memcpy/memmove when 
the pointer is known to come from either a global variable, alloca or
malloc.  This allows us to compile this:

  P = malloc(28);
  memset(P, 0, 28);

into explicit stores on PPC instead of a memset call.

llvm-svn: 26577
 2006-03-06 20:18:44 +00:00
Chris Lattner
86375c060a update file comment 
llvm-svn: 26573
 2006-03-06 17:58:04 +00:00
Evan Cheng
2fad0ea044 Remove some code that doesn't make sense 
llvm-svn: 26572
 2006-03-06 07:31:44 +00:00
Reid Spencer
9720d6fc61 Make sure command line options are parsed before we try to add the LibPath 
(-L options) to TheLinker. Problem noticed by Wink Saville.

llvm-svn: 26571
 2006-03-06 06:38:19 +00:00
Evan Cheng
8fd9503fbd Remove SUnit::Priority1: it is re-calculated on demand as number of live 
range to be generated.

llvm-svn: 26570
 2006-03-06 06:08:54 +00:00
Chris Lattner
c6d1fbab70 Hoist the HazardRecognizer out of the ScheduleDAGList.cpp file to where 
targets can implement them.  Make the top-down scheduler non-g5-specific.

Remove the old testing hazard recognizer.

llvm-svn: 26569
 2006-03-06 00:22:00 +00:00
Chris Lattner
a0769e790e Hoist the HazardRecognizer out of the ScheduleDAGList.cpp file to where 
targets can implement them.  Make the top-down scheduler non-g5-specific.

llvm-svn: 26568
 2006-03-06 00:20:29 +00:00
Chris Lattner
ca7ed30ee6 Comment fixes 
llvm-svn: 26567
 2006-03-05 23:59:20 +00:00
Chris Lattner
101ce8f304 Don't depend on the C99 copysign function, implement it ourselves. 
llvm-svn: 26566
 2006-03-05 23:57:58 +00:00
Chris Lattner
99767c08ca new testcase I forgot to check in earlier 
llvm-svn: 26565
 2006-03-05 23:53:04 +00:00
Chris Lattner
5c28fdcae8 When a hazard recognizer needs noops to be inserted, do so. This represents 
noops as null pointers in the instruction sequence.

llvm-svn: 26564
 2006-03-05 23:51:47 +00:00
Chris Lattner
4dae9a978e add an emitnoop method 
llvm-svn: 26563
 2006-03-05 23:50:42 +00:00
Chris Lattner
af44ead7f3 implement TII::insertNoop 
llvm-svn: 26562
 2006-03-05 23:49:55 +00:00
Chris Lattner
c656f75535 custom lowered nodes are legal too 
llvm-svn: 26561
 2006-03-05 23:49:19 +00:00
Chris Lattner
5fd145d9c4 add a hook to insert a noop 
llvm-svn: 26560
 2006-03-05 23:48:51 +00:00
Chris Lattner
0ee7522721 Implement G5HazardRecognizer as a trivial thing that wants 5 cycles between 
copyfromreg nodes.  Clearly useful!

llvm-svn: 26559
 2006-03-05 23:13:56 +00:00
Chris Lattner
ccda7ffffd Add basic hazard recognizer support. noop insertion isn't complete yet though. 
llvm-svn: 26558
 2006-03-05 22:45:01 +00:00
Andrew Lenharth
89ca36285c For transforms the behave differently if main goes away, add an option to prevent bugpoint from removing main 
llvm-svn: 26557
 2006-03-05 22:21:36 +00:00
Jeff Cohen
578bf37e22 Fix VC++ compilation error. 
llvm-svn: 26554
 2006-03-05 21:43:37 +00:00
Jim Laskey
45dfae3a50 Breathe some life into a comment. 
llvm-svn: 26553
 2006-03-05 21:20:20 +00:00
Chris Lattner
ef4bef419b Split the list scheduler into top-down and bottom-up pieces. The priority 
function of the top-down scheduler are completely bogus currently, and
having (future) PPC specific in this file is also wrong, but this is a
small incremental step.

llvm-svn: 26552
 2006-03-05 21:10:33 +00:00
Chris Lattner
a171bcca08 Add a new scheduling type. This is, of course, a hack. Proper factoring 
will come later.

llvm-svn: 26551
 2006-03-05 21:08:06 +00:00
Chris Lattner
49ccda9563 Move the available queue to being inside the ListSchedule method, since it 
bounds its lifetime.

llvm-svn: 26550
 2006-03-05 20:21:55 +00:00
Chris Lattner
4957693551 add a note 
llvm-svn: 26549
 2006-03-05 20:00:08 +00:00
Chris Lattner
f2bed5f46e Reinstate this now that the offending opposite xform has been removed. 
llvm-svn: 26548
 2006-03-05 19:53:55 +00:00
Chris Lattner
f8cbc8c4ea Do not fold (add (shl x, c1), (shl c2, c1)) -> (shl (add x, c2), c1), 
we want to canonicalize the other way.

llvm-svn: 26547
 2006-03-05 19:52:57 +00:00
Chris Lattner
93ad7177b4 print arbitrary constant pool entries 
llvm-svn: 26545
 2006-03-05 09:38:03 +00:00
Evan Cheng
e0a6cf78f8 Back out fold (shl (add x, c1), c2) -> (add (shl x, c2), c1<<c2) for now. 
It's causing an infinite loop compiling ldecod on x86 / Darwin.

llvm-svn: 26544
 2006-03-05 07:30:16 +00:00
Chris Lattner
827e3f62b0 Add some simple copysign folds 
llvm-svn: 26543
 2006-03-05 05:30:57 +00:00
Chris Lattner
4b4b3e6cbb Codegen copysign[f] into a FCOPYSIGN node 
llvm-svn: 26542
 2006-03-05 05:09:38 +00:00
Chris Lattner
6b0947c277 Copysign needs to be expanded everywhere. Note that Alpha and IA64 should 
implement copysign as a native op if they have it.

llvm-svn: 26541
 2006-03-05 05:08:37 +00:00
Chris Lattner
9f589d65a1 Add a copysign node 
llvm-svn: 26540
 2006-03-05 05:06:40 +00:00
Chris Lattner
55fbd49ca9 add a note for something evan noticed 
llvm-svn: 26539
 2006-03-05 01:15:18 +00:00
Chris Lattner
43e9ec760b Make vector narrowing more effective, implementing 
Transforms/InstCombine/vec_narrow.ll.  This add support for narrowing
extract_element(insertelement) also.

llvm-svn: 26538
 2006-03-05 00:22:33 +00:00
Chris Lattner
1acc82fcb2 new testcase for vector narrowing. 
llvm-svn: 26537
 2006-03-05 00:21:28 +00:00
Chris Lattner
7d2423c91f Implemented. 
llvm-svn: 26536
 2006-03-04 23:33:44 +00:00
Chris Lattner
cd57ff4fb6 fold (mul (add x, c1), c2) -> (add (mul x, c2), c1*c2) 
fold (shl (add x, c1), c2) -> (add (shl x, c2), c1<<c2)

This allows us to compile CodeGen/PowerPC/addi-reassoc.ll into:

_test1:
        slwi r2, r4, 4
        add r2, r2, r3
        lwz r3, 36(r2)
        blr
_test2:
        mulli r2, r4, 5
        add r2, r2, r3
        lbz r2, 11(r2)
        extsb r3, r2
        blr

instead of:

_test1:
        addi r2, r4, 2
        slwi r2, r2, 4
        add r2, r3, r2
        lwz r3, 4(r2)
        blr
_test2:
        addi r2, r4, 2
        mulli r2, r2, 5
        add r2, r3, r2
        lbz r2, 1(r2)
        extsb r3, r2
        blr

llvm-svn: 26535
 2006-03-04 23:33:26 +00:00
Chris Lattner
69ca9936f4 new testcase 
llvm-svn: 26534
 2006-03-04 23:31:49 +00:00
Chris Lattner
805838e63e Fix a crash compiling Obsequi 
llvm-svn: 26529
 2006-03-04 21:48:01 +00:00