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Author SHA1 Message Date
Chris Lattner
151eb931ec Pull the InsertCastOfTo out of the header, implement CSE'ing of arguments. 
llvm-svn: 25973
 2006-02-04 09:51:53 +00:00
Chris Lattner
d92225434a Refactor a bunch of code into a non-inlined method 
llvm-svn: 25972
 2006-02-04 09:51:33 +00:00
Chris Lattner
15ab5c6d0c Temporarily revert this patch, which probably breaks with the 
tblgen patch reverted.

llvm-svn: 25971
 2006-02-04 09:24:16 +00:00
Chris Lattner
951217976d Temporarily revert the last change, which breaks PPC and other targets that 
DO select things.

llvm-svn: 25970
 2006-02-04 09:23:06 +00:00
Chris Lattner
964e9b66f8 Value# select instructions, allowing -gcse to remove duplicates 
llvm-svn: 25969
 2006-02-04 09:15:29 +00:00
Evan Cheng
6a366c5eda Complex pattern's custom matcher should not call Select() on any operands. 
Select them afterwards if it returns true.

llvm-svn: 25968
 2006-02-04 08:50:49 +00:00
Chris Lattner
0ddab3fc99 Custom lower VAARG for the case when we are doing vaarg(double). In this 
case, the double being loaded may not be 8-byte aligned, so we have to use
our standard bit_convert game.

llvm-svn: 25967
 2006-02-04 08:31:30 +00:00
Chris Lattner
6466bb23bc Fix a nasty typo that broke functions with big stack frames. 
llvm-svn: 25966
 2006-02-04 08:04:21 +00:00
Chris Lattner
bb656b4730 fix a bug in my last checkin 
llvm-svn: 25965
 2006-02-04 07:48:46 +00:00
Chris Lattner
8741126ea7 Fix two significant bugs in LSR: 
1. When rewriting code in outer loops, sometimes we would insert code into
   inner loops that is invariant in that loop.
2. Notice that 4*(2+x) is 8+4*x and use that to simplify expressions.

This is a performance neutral change.

llvm-svn: 25964
 2006-02-04 07:36:50 +00:00
Nate Begeman
ba19f3f93c Remove some stuff that now works 
llvm-svn: 25963
 2006-02-04 07:29:35 +00:00
Chris Lattner
921ddbae1f add a note 
llvm-svn: 25962
 2006-02-04 07:07:31 +00:00
Chris Lattner
3b39e70a72 Two changes: 
1. Treat FMOVD as a copy instruction, to help with coallescing in V9 mode
2. When in V9 mode, insert FMOVD instead of FpMOVD instructions, as we don't
   ever rewrite FpMOVD instructions into FMOVS instructions, thus we just end
   up with commented out copies!
This should fix a bunch of failures in V9 mode on sparc.

llvm-svn: 25961
 2006-02-04 06:58:46 +00:00
Evan Cheng
062ac6e46b Get rid of some memory leaks identified by Valgrind 
llvm-svn: 25960
 2006-02-04 06:49:00 +00:00
Chris Lattner
43978e529e add a method 
llvm-svn: 25959
 2006-02-04 05:49:01 +00:00
Chris Lattner
d8d71c2b6a Let bugpoint work on sparc with v9 instructions enabled. 
llvm-svn: 25958
 2006-02-04 05:02:27 +00:00
Jeff Cohen
291586095d Fix VC++ warning. 
llvm-svn: 25957
 2006-02-04 03:27:39 +00:00
Jeff Cohen
965da754a0 Keep Visual Studio informed. 
llvm-svn: 25956
 2006-02-04 03:27:04 +00:00
Chris Lattner
013f5fc2fa Add initial support for immediates. This allows us to compile this: 
int %rlwnm(int %A, int %B) {
  %C = call int asm "rlwnm $0, $1, $2, $3, $4", "=r,r,r,n,n"(int %A, int %B, int 4, int 17)
  ret int %C
}

into:

_rlwnm:
        or r2, r3, r3
        or r3, r4, r4
        rlwnm r2, r2, r3, 4, 17    ;; note the immediates :)
        or r3, r2, r2
        blr

llvm-svn: 25955
 2006-02-04 02:26:14 +00:00
Evan Cheng
8fd9fd7866 Remove an unnecessary predicate. 
llvm-svn: 25954
 2006-02-04 02:23:01 +00:00
Evan Cheng
078962656b Separate FILD and FILD_FLAG, the later is only used for SSE2. It produces a 
flag so it can be flagged to a FST.

llvm-svn: 25953
 2006-02-04 02:20:30 +00:00
Chris Lattner
13f609dfe2 Initial early support for non-register operands, like immediates 
llvm-svn: 25952
 2006-02-04 02:16:44 +00:00
Chris Lattner
785771db97 implementation of some methods for inlineasm 
llvm-svn: 25951
 2006-02-04 02:13:02 +00:00
Chris Lattner
2395722dbd Add some methods for inline asm support. 
llvm-svn: 25950
 2006-02-04 02:12:09 +00:00
Chris Lattner
08dba8d9f8 Handle another case exposed on X86. 
llvm-svn: 25949
 2006-02-03 23:50:46 +00:00
Chris Lattner
f0ef4b4391 Fix a nasty problem on two-address machines in the following situation: 
store EAX -> [ss#0]
[ss#0] += 1
...
use(EAX)

In this case, it is not valid to rewrite this as:


store EAX -> [ss#0]
EAX += 1
store EAX -> [ss#0]  ;;; this would also delete the store above
...
use(EAX)

... because EAX is not a dead at that point.  Keep track of which registers
we are allowed to clobber, and which ones we aren't, and don't clobber the
ones we're not supposed to.  :)

This should resolve the issues on X86 last night.

llvm-svn: 25948
 2006-02-03 23:28:46 +00:00
Chris Lattner
03b42d7724 significantly simplify the VirtRegMap code by pulling the SpillSlotsAvailable 
and PhysRegsAvailable maps out into a new AvailableSpills struct.  No
functionality change.

This paves the way for a bugfix, coming up next.

llvm-svn: 25947
 2006-02-03 23:13:58 +00:00
Nate Begeman
5a58572b9b Implement some feedback from sabre 
llvm-svn: 25946
 2006-02-03 22:38:07 +00:00
Nate Begeman
2d9838ec9b Add a framework for eliminating instructions that produces undemanded bits. 
llvm-svn: 25945
 2006-02-03 22:24:05 +00:00
Chris Lattner
393e9d10dd add a note 
llvm-svn: 25944
 2006-02-03 22:06:45 +00:00
Chris Lattner
2b82e66f7c another case Nate came up with 
llvm-svn: 25943
 2006-02-03 22:05:41 +00:00
Chris Lattner
6c39bcf741 add a note 
llvm-svn: 25942
 2006-02-03 21:25:23 +00:00
Chris Lattner
47b11a250c remove some #ifdef'd out code, which should properly be in the dag combiner anyway. 
llvm-svn: 25941
 2006-02-03 20:13:59 +00:00
Chris Lattner
366fa6bb83 remove an old comment 
llvm-svn: 25940
 2006-02-03 18:59:39 +00:00
Chris Lattner
782422567b Remove the X86PeepholeOptimizerPass, a truly horrible old hack that is now 
obsolete.  yaay :)

llvm-svn: 25939
 2006-02-03 18:54:24 +00:00
Chris Lattner
70ef21db04 When rewriting frame instructions, emit the appropriate small-immediate 
instruction when possible.

llvm-svn: 25938
 2006-02-03 18:20:04 +00:00
Chris Lattner
21f305febf node predicates add to the complexity of a pattern. This ensures that the 
X86 backend attempts to match small-immediate versions of instructions before
the full size immediate versions.

llvm-svn: 25937
 2006-02-03 18:06:02 +00:00
Chris Lattner
255ef92e53 Teach sparc to fold loads/stores into copies. 
Remove the dead getRegClassForType method
minor formating changes.

llvm-svn: 25936
 2006-02-03 07:06:25 +00:00
Chris Lattner
541258d077 remove dead fn 
llvm-svn: 25935
 2006-02-03 06:51:34 +00:00
Nate Begeman
78c9e14249 Add common code for reassociating ops in the dag combiner 
llvm-svn: 25934
 2006-02-03 06:46:56 +00:00
Evan Cheng
79edabf042 Added a (store (op (load ...) ...) ...) folding test case. 
llvm-svn: 25933
 2006-02-03 06:46:41 +00:00
Chris Lattner
590c0d8621 Implement isLoadFromStackSlot and isStoreToStackSlot 
llvm-svn: 25932
 2006-02-03 06:44:54 +00:00
Evan Cheng
7c8bab62e5 (store (op (load ...))) folding problem. In the generated matching code, 
Chain is initially set to the chain operand of store node, when it reaches
load, if it matches the load then Chain is set to the chain operand of the
load.

However, if the matching code that follows this fails, isel moves on to the
next pattern but it does not restore Chain to the chain operand of the store.
So when it tries to match the next store / op / load pattern it would fail on
the Chain == load.getOperand(0) test.

The solution is for each chain operand to get a unique name. e.g. Chain10.

llvm-svn: 25931
 2006-02-03 06:22:41 +00:00
Chris Lattner
172cf85d48 remove some target-indep and implemented notes 
llvm-svn: 25930
 2006-02-03 06:22:11 +00:00
Chris Lattner
9f8d39543f target independent notes 
llvm-svn: 25929
 2006-02-03 06:21:43 +00:00
Nate Begeman
85f3c9f566 Flesh out a couple of the items in the README 
llvm-svn: 25928
 2006-02-03 05:17:06 +00:00
Jeff Cohen
e2f56a56f6 Fix VC++ compilation error caused by using a std::map iterator variable to receive 
a std::multimap iterator value.  For some reason, GCC doesn't have a problem with this.

llvm-svn: 25927
 2006-02-03 03:48:54 +00:00
Chris Lattner
9ca1b98733 Remove move copies and dead stuff by not clobbering the result reg of a noop copy. 
llvm-svn: 25926
 2006-02-03 03:16:14 +00:00
Andrew Lenharth
c879542ab0 isStoreToStackSlot 
llvm-svn: 25925
 2006-02-03 03:07:37 +00:00
Chris Lattner
8e4e3207fe Simplify some code 
llvm-svn: 25924
 2006-02-03 03:06:49 +00:00