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3856 Commits

Author SHA1 Message Date
Owen Anderson
d29ed0b122 Fix an issue where GVN had the sizes of the two memcpy's reverse, resulting 
in an invalid transformation.

llvm-svn: 47639
 2008-02-26 23:06:17 +00:00
Gabor Greif
aa2617206f fix http://llvm.org/bugs/show_bug.cgi?id=2097 
llvm-svn: 47615
 2008-02-26 19:13:21 +00:00
Eli Friedman
666bbe34f4 Fix for pr2093: direct operands aren't necessarily addresses, so don't 
try to simplify them.

llvm-svn: 47610
 2008-02-26 18:37:49 +00:00
Bill Wendling
d188e03715 De-tabify. 
llvm-svn: 47599
 2008-02-26 10:53:30 +00:00
Evan Cheng
1da250097b Fix PR2076. CodeGenPrepare now sinks address computation for inline asm memory 
operands into inline asm block.

llvm-svn: 47589
 2008-02-26 02:42:37 +00:00
Owen Anderson
df1d2b02f9 Fix an issue where GVN was performing the return slot optimization when it was 
not safe.  This is fixed by more aggressively checking that the return slot is
not used elsewhere in the function.

llvm-svn: 47544
 2008-02-25 04:08:09 +00:00
Owen Anderson
40dca46ddb Fix an issue where GVN would try to use an instruction before its definition when performing return slot optimization. 
llvm-svn: 47541
 2008-02-25 00:40:41 +00:00
Dale Johannesen
09f410b6d7 Split ParameterAttributes.h, putting the complicated 
stuff into ParamAttrsList.h.  Per feedback from
ParamAttrs changes.

llvm-svn: 47504
 2008-02-22 22:17:59 +00:00
Zhou Sheng
3b8eb704fc Fixed a typo. 
llvm-svn: 47478
 2008-02-22 10:00:35 +00:00
Dan Gohman
360c86aed5 Add explicit keywords. 
llvm-svn: 47382
 2008-02-20 16:44:09 +00:00
Anton Korobeynikov
18991d78fa Fix newly-introduced 4.3 warnings 
llvm-svn: 47375
 2008-02-20 12:07:57 +00:00
Anton Korobeynikov
6f74afea32 Get rid of hash_map. Use StringMap instead 
llvm-svn: 47373
 2008-02-20 11:27:49 +00:00
Anton Korobeynikov
1bfd121321 Make Transforms to be 4.3 warnings-clean 
llvm-svn: 47371
 2008-02-20 11:26:25 +00:00
Anton Korobeynikov
579f07135a 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
Owen Anderson
b4724dbda2 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
Dale Johannesen
89268bc6e2 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
Chris Lattner
c3591a0d48 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
032fb2eda9 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
e92e303582 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
f7b7ba9c5a isa+cast -> dyncast. 
llvm-svn: 47320
 2008-02-19 06:53:20 +00:00
Chris Lattner
c130e3afc4 simplify this code again, try 2 :) 
llvm-svn: 47319
 2008-02-19 06:52:38 +00:00
Owen Anderson
e71d6e37b2 Fix a comment. 
llvm-svn: 47318
 2008-02-19 06:51:23 +00:00
Owen Anderson
806cbde53b 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
0fe6bce9ce 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
Owen Anderson
c0c3cd8e27 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
551b8eeb5c 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
336824f102 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
ffca8e99b2 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
Nick Lewycky
fefd0202c9 Correctly fold divide-by-constant, even when faced with overflow. 
llvm-svn: 47287
 2008-02-18 22:48:05 +00:00
Chris Lattner
1e3c501cb8 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
Chris Lattner
0af5601028 minor code simplification, no functionality change. 
llvm-svn: 47275
 2008-02-18 17:47:29 +00:00
Duncan Sands
85fab3a3ad Simplify caller updating using a CallSite, as 
requested by Chris.  While there, do the same
for an existing function committed by someone
called "lattner" :)

llvm-svn: 47273
 2008-02-18 17:32:13 +00:00
Owen Anderson
3549553262 Add support to GVN for performing sret return slot optimization. This means that, if an sret function tail calls 
another sret function, it should pass its own sret parameter to the tail callee, allowing it to fill in the correct
return value.  llvm-gcc does not emit this by default.  Instead, it allocates space in the caller for the sret of
the tail call and then uses memcpy to copy the result into the caller's sret parameter.  This optimization detects
and optimizes that case.

llvm-svn: 47265
 2008-02-18 09:24:53 +00:00
Chris Lattner
6b39cb907b switch simplifycfg from using vectors for most things to smallvectors, 
this speeds it up 2.3% on eon.

llvm-svn: 47261
 2008-02-18 07:42:56 +00:00
Chris Lattner
024f8c8f09 optimize away stackrestore calls that have no intervening alloca or call. 
llvm-svn: 47258
 2008-02-18 06:12:38 +00:00
Chris Lattner
0e7fd2f1a8 simplify some code, BreakUpSubtract always returns nonnull now. 
llvm-svn: 47251
 2008-02-18 02:18:25 +00:00
Chris Lattner
cc22601bc3 Fold (-x + -y) -> -(x+y) which promotes better association, fixing 
the second half of PR2047

llvm-svn: 47244
 2008-02-17 21:03:36 +00:00
Chris Lattner
5f08ec854f fix pasto 
llvm-svn: 47242
 2008-02-17 20:54:40 +00:00
Chris Lattner
a70d138457 Split up subtracts into add+negate if they have a reassociable use or operand 
that is also a subtract.  This implements PR2047 and Transforms/Reassociate/subtest2.ll 

llvm-svn: 47241
 2008-02-17 20:51:26 +00:00
Chris Lattner
902537cd8d make the logic for breaking up subtracts more explicit, no 
functionality change.

llvm-svn: 47239
 2008-02-17 20:44:51 +00:00
Duncan Sands
573b3f89e4 Remove any 'nest' parameter attributes if the function 
is not passed as an argument to a trampoline intrinsic.

llvm-svn: 47220
 2008-02-16 20:56:04 +00:00
Devang Patel
a42c3147cc Fix PR2028 
llvm-svn: 47150
 2008-02-15 01:24:49 +00:00
Devang Patel
2e622e4c2b If loop header is also loop exiting block then OrigPN is incoming value for B loop header. 
Fixes PR 2030.

llvm-svn: 47141
 2008-02-14 23:18:47 +00:00
Chris Lattner
70e294660a Fix PR2029 
llvm-svn: 47129
 2008-02-14 19:18:13 +00:00
Chris Lattner
89acd61805 simplify code, no functionality change. 
llvm-svn: 47116
 2008-02-14 07:39:01 +00:00
Nick Lewycky
7c77e2bc65 Fix PR2032. Inform the alias analysis of changes to the underlying program. 
llvm-svn: 47111
 2008-02-14 07:11:24 +00:00
Devang Patel
0ecb76d820 A loop latch phi node may have uses inside loop, not just in loop header. 
llvm-svn: 47093
 2008-02-13 22:23:07 +00:00
Dan Gohman
1ee8dc97d9 Rename APInt's isPositive to isNonNegative, to reflect what it 
actually does.

llvm-svn: 47090
 2008-02-13 22:09:18 +00:00
Devang Patel
22c3caab6e While moving exit condition, do not drop loop latch on the floor. 
llvm-svn: 47089
 2008-02-13 22:06:36 +00:00
Devang Patel
c281d8031b Keep track of exit value operand number when operands are swapped. 
llvm-svn: 47082
 2008-02-13 19:48:48 +00:00