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21764 Commits

Author SHA1 Message Date
Anton Korobeynikov
0c5e186924 Unbreak build with gcc 4.3: provide missed includes and silence most annoying warnings. 
llvm-svn: 47367
 2008-02-20 11:08:44 +00:00
Bill Wendling
54bd12bc49 Added some comments and reformatted others. No functionality change. 
Added two "FIXMEs" for code that looks dubious to me (but I could be
wrong).

llvm-svn: 47366
 2008-02-20 09:15:16 +00:00
Owen Anderson
52ed56338d When performing return slot optimization, remember to inform memdep when we're removing the memcpy. 
llvm-svn: 47364
 2008-02-20 08:23:02 +00:00
Evan Cheng
a1f7505972 Added memmove to interpreter external functions list. Patch by Daniel Dunbar. 
llvm-svn: 47363
 2008-02-20 07:55:26 +00:00
Bill Wendling
9a2a1ddf6e More constification of things. More comments added. No functionality 
changes. (Sorry for any formatting changes that creeped in.)

llvm-svn: 47362
 2008-02-20 07:36:31 +00:00
Nick Lewycky
4df6c66b42 Use getConstant for ConstantInts. 
llvm-svn: 47361
 2008-02-20 06:58:55 +00:00
Nick Lewycky
0b6cdd1eff Add 'umax' similar to 'smax' SCEV. Closes PR2003. 
Parse reversed smax and umax as smin and umin and express them with negative
or binary-not SCEVs (which are really just subtract under the hood).

Parse 'xor %x, -1' as (-1 - %x).

Remove dead code (ConstantInt::get always returns a ConstantInt).

Don't use getIntegerSCEV(-1, Ty). The first value is an int, then it gets
passed into a uint64_t. Instead, create the -1 directly from
ConstantInt::getAllOnesValue().

llvm-svn: 47360
 2008-02-20 06:48:22 +00:00
Chris Lattner
8705005be1 Fix an incredibly subtle bug exposed by Ted's change to APInt profiling. 
AddNodeIDNode does profiling for a ConstantSDNode, but so does 
SelectionDAG::getConstant.  This profiling should be moved to a common
static function in ConstantSDNode.

llvm-svn: 47359
 2008-02-20 06:28:01 +00:00
Bill Wendling
723b09a29d No functionality change: 
- Constified some MachineOperand values.
 - Added/Modified some comments.

llvm-svn: 47358
 2008-02-20 06:10:21 +00:00
Evan Cheng
e9708c997f Disable for now. This is pessimizing code. 
llvm-svn: 47354
 2008-02-20 02:29:17 +00:00
Dale Johannesen
7eccf11cfb Add Alignment field to ParameterAttributes and 
treat more or less rationally in interface
functions, subject to change.  No functional change.

llvm-svn: 47352
 2008-02-19 23:51:49 +00:00
Evan Cheng
35253f2c22 Add hidden option -x86-fold-and-in-test to test the effect the test / and folding change. 
llvm-svn: 47351
 2008-02-19 23:36:51 +00:00
Devang Patel
f5e3f35874 regenerate 
llvm-svn: 47350
 2008-02-19 22:27:01 +00:00
Devang Patel
7a4c97d14a Parse 
%b = getresult {i32, i32} %a, i32 1

llvm-svn: 47349
 2008-02-19 22:26:37 +00:00
Devang Patel
a74d2cbb6f Add GetResultInst. First step for multiple return value support. 
llvm-svn: 47348
 2008-02-19 22:15:16 +00:00
Dale Johannesen
b022130b62 Generated files for checkin 47342. 
llvm-svn: 47344
 2008-02-19 21:40:51 +00:00
Dale Johannesen
b713b1dde4 Forgot a file, goes with 47342. 
llvm-svn: 47343
 2008-02-19 21:40:10 +00:00
Dale Johannesen
ecb2b233b1 Expand ParameterAttributes to 32 bits (in preparation 
for adding alignment info, not there yet).  Clean up
interfaces to reference ParameterAttributes consistently.

llvm-svn: 47342
 2008-02-19 21:38:47 +00:00
Ted Kremenek
0449b1da95 Fixed bug in APInt::Profile() where the BitWidth field was not included in the 
profile of the APSInt object. This caused unexpected Profile collisions where
none should have occurred.

llvm-svn: 47338
 2008-02-19 20:50:41 +00:00
Andrew Lenharth
8e5c7e0bd9 fix some byval problems in the cbe. Closes PR2065 
llvm-svn: 47337
 2008-02-19 19:47:54 +00:00
Chris Lattner
699e5dbcee random cleanups. 
llvm-svn: 47334
 2008-02-19 18:49:08 +00:00
Chris Lattner
3a4ac3a69e Don't fold and's into test instructions if they have multiple uses. 
This compiles test-nofold.ll into:

_test:
	movl	$15, %ecx
	andl	4(%esp), %ecx
	testl	%ecx, %ecx
	movl	$42, %eax
	cmove	%ecx, %eax
	ret

instead of:
_test:
	movl	4(%esp), %eax
	movl	%eax, %ecx
	andl	$15, %ecx
	testl	$15, %eax
	movl	$42, %eax
	cmove	%ecx, %eax
	ret

llvm-svn: 47330
 2008-02-19 17:37:35 +00:00
Duncan Sands
1bba49ca55 Fix a compiler warning. 
llvm-svn: 47328
 2008-02-19 09:28:48 +00:00
Chris Lattner
ae2f8bc116 remove the LowerSelect pass. The last client was the old Sparc backend, which is long dead by now. 
llvm-svn: 47323
 2008-02-19 07:49:17 +00:00
Chris Lattner
010e9fb704 remove the lower packed pass. It can never work and even the parts that 
could work don't work fully.  This fixes PR1705.  Oh yeah, we don't have
packed types anymore either ;-)

llvm-svn: 47322
 2008-02-19 07:39:17 +00:00
Owen Anderson
6196cdcb48 Refactor this method a bit, and correct a test that was completely wrong but happened to work out anyways. :-) 
llvm-svn: 47321
 2008-02-19 07:07:51 +00:00
Chris Lattner
99e0b1c063 isa+cast -> dyncast. 
llvm-svn: 47320
 2008-02-19 06:53:20 +00:00
Chris Lattner
0ee0f38084 simplify this code again, try 2 :) 
llvm-svn: 47319
 2008-02-19 06:52:38 +00:00
Owen Anderson
d60bb0a64b Fix a comment. 
llvm-svn: 47318
 2008-02-19 06:51:23 +00:00
Owen Anderson
3efff61819 In addition to arguments passed to it, memcpy (and all other calls) can ModRef pointers that alias their arguments as well. This fixes PR2057. 
llvm-svn: 47317
 2008-02-19 06:47:18 +00:00
Owen Anderson
dbc264003e Major improvements to yesterday's return slot optimization. Remove some unneccessary constraints, 
and add some others that should have been in from the first place.  Document the whole thing better.

llvm-svn: 47315
 2008-02-19 06:35:43 +00:00
Chris Lattner
85482657eb Fix some minor issues folding undef, PR2052 
llvm-svn: 47314
 2008-02-19 06:22:12 +00:00
Chris Lattner
6bb889cf84 fdiv/frem of undef can produce undef, because the undef operand 
can be a SNaN.  We could be more aggressive and turn this into 
unreachable, but that is less nice, and not really worth it.

llvm-svn: 47313
 2008-02-19 06:12:18 +00:00
Chris Lattner
851ebb75de regenerate 
llvm-svn: 47312
 2008-02-19 04:36:25 +00:00
Chris Lattner
5400cc3907 Fix PR2060 by rejecting invalid types for integer constants. 
llvm-svn: 47311
 2008-02-19 04:36:07 +00:00
Owen Anderson
4e6f18d5bf Factor the profitability check for return slot optimization out into a static function. 
At some point in the future, this check will become smarter.

llvm-svn: 47310
 2008-02-19 03:27:34 +00:00
Owen Anderson
3782cd74d1 An sret parameter is required to be the first parameter, so there's no need to loop 
over all the parameters of the callee looking for it.

llvm-svn: 47309
 2008-02-19 03:15:29 +00:00
Owen Anderson
ea5cdf1a83 Cleanup some of my patches from yesterday. Refactor the check for which xform 
to apply to a memcpy into processInstruction.  Also, fix a bug in the check due to
missing braces.

llvm-svn: 47307
 2008-02-19 03:09:45 +00:00
Owen Anderson
5c258ed93d Fix Transforms/GVN/memcpy.ll, which Chris broke in r47275 by reordering the branches. memcpy's are a kind of CallInst. 
llvm-svn: 47305
 2008-02-19 02:53:23 +00:00
Evan Cheng
e18e5201fc PR1909: Tail merging pass ran wild. It makes no sense to merge blocks in order to save a single instruction since a branch will be inserted for each BB. 
llvm-svn: 47301
 2008-02-19 02:09:37 +00:00
Evan Cheng
ece0db124f Me not like duplicated comments. 
llvm-svn: 47300
 2008-02-19 02:05:16 +00:00
Evan Cheng
bb577266bf - When DAG combiner is folding a bit convert into a BUILD_VECTOR, it should check if it's essentially a SCALAR_TO_VECTOR. Avoid turning (v8i16) <10, u, u, u> to <10, 0, u, u, u, u, u, u>. Instead, simply convert it to a SCALAR_TO_VECTOR of the proper type. 
- X86 now normalize SCALAR_TO_VECTOR to (BIT_CONVERT (v4i32 SCALAR_TO_VECTOR)). Get rid of X86ISD::S2VEC.

llvm-svn: 47290
 2008-02-18 23:04:32 +00:00
Nick Lewycky
1f3c58df08 Correctly fold divide-by-constant, even when faced with overflow. 
llvm-svn: 47287
 2008-02-18 22:48:05 +00:00
Dan Gohman
0d0f16ca85 Chris pointed out that it's not necessary to set i64 MUL to Expand 
on x86-32 since i64 itself is not a Legal type. And, update some
comments.

llvm-svn: 47282
 2008-02-18 19:34:53 +00:00
Evan Cheng
03fd8ea753 - Remove the previous check which broke coalescer-commute3.ll 
- For now, conservatively ignore copy MI whose source is a physical register. Commuting its def MI can cause a physical register live interval to be live through a loop (since we know it's live coming into the def MI).

llvm-svn: 47281
 2008-02-18 18:56:31 +00:00
Chris Lattner
79ecc053ca upgrade some tests. 
llvm-svn: 47280
 2008-02-18 18:46:39 +00:00
Nate Begeman
66df9740df Add a note 
llvm-svn: 47279
 2008-02-18 18:39:23 +00:00
Chris Lattner
6ab061dd2d Add a note about sext from i1 plus flags use. 
llvm-svn: 47278
 2008-02-18 18:30:13 +00:00
Dan Gohman
70b9b2f77f Don't mark scalar integer multiplication as Expand on x86, since x86 
has plain one-result scalar integer multiplication instructions.
This avoids expanding such instructions into MUL_LOHI sequences that
must be special-cased at isel time, and avoids the problem with that
code that provented memory operands from being folded.

This fixes PR1874, addressesing the most common case. The uncommon
cases of optimizing multiply-high operations will require work
in DAGCombiner.

llvm-svn: 47277
 2008-02-18 17:55:26 +00:00
Chris Lattner
a378b03483 Transforming -A + -B --> -(A + B) isn't safe for FP, thanks 
to Dale for noticing this!

llvm-svn: 47276
 2008-02-18 17:50:16 +00:00