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cb72d92471
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3860 Commits

Author SHA1 Message Date
Devang Patel
cb72d92471 Add pass to promote sret. 
This pass transforms 

  %struct._Point = type { i32, i32, i32, i32, i32, i32 }
  define internal void @foo(%struct._Point* sret  %agg.result)

into

  %struct._Point = type { i32, i32, i32, i32, i32, i32 }
  define internal %struct._Point @foo()

This pass updates foo() clients appropriately to use
getresult instruction to extract return values.

This pass is not yet ready for prime time.

llvm-svn: 47776
 2008-02-29 23:34:08 +00:00
Chris Lattner
75f5d14574 fix a bug Anders ran into where scalarrepl would crash when promoting 
a union containing a vector and an array whose elements were smaller than
the vector elements.  this means we need to compile the load of the 
array elements into an extract element plus a truncate.

llvm-svn: 47752
 2008-02-29 07:12:06 +00:00
Chris Lattner
8f87e409b2 Refactor some code out of ConvertUsesToScalar into their own methods, no 
functionality change.

llvm-svn: 47751
 2008-02-29 07:03:13 +00:00
Chris Lattner
5aeccb7353 Folding or(fcmp,fcmp) only works if the operands of the fcmps are the same fp type. 
llvm-svn: 47750
 2008-02-29 06:09:11 +00:00
Owen Anderson
eadd074b22 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
2cb16cddf1 fix http://llvm.org/bugs/show_bug.cgi?id=2097 
llvm-svn: 47615
 2008-02-26 19:13:21 +00:00
Eli Friedman
1f2cabfbcf 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
bd1f1ae160 De-tabify. 
llvm-svn: 47599
 2008-02-26 10:53:30 +00:00
Evan Cheng
6366bbf577 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
6eafd532ab 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
432abc0479 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
ae08bdb4cf 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
0742fbfedf Fixed a typo. 
llvm-svn: 47478
 2008-02-22 10:00:35 +00:00
Dan Gohman
48d03d5a2d Add explicit keywords. 
llvm-svn: 47382
 2008-02-20 16:44:09 +00:00
Anton Korobeynikov
c41f5b6af4 Fix newly-introduced 4.3 warnings 
llvm-svn: 47375
 2008-02-20 12:07:57 +00:00
Anton Korobeynikov
2523c8be38 Get rid of hash_map. Use StringMap instead 
llvm-svn: 47373
 2008-02-20 11:27:49 +00:00
Anton Korobeynikov
fd6b669c80 Make Transforms to be 4.3 warnings-clean 
llvm-svn: 47371
 2008-02-20 11:26:25 +00:00
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
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
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
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
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
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
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
Nick Lewycky
1f3c58df08 Correctly fold divide-by-constant, even when faced with overflow. 
llvm-svn: 47287
 2008-02-18 22:48:05 +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
Chris Lattner
a3318d17d4 minor code simplification, no functionality change. 
llvm-svn: 47275
 2008-02-18 17:47:29 +00:00
Duncan Sands
a85448506d 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
7b092ea631 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
b22dbdf4fc 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
9851db050b optimize away stackrestore calls that have no intervening alloca or call. 
llvm-svn: 47258
 2008-02-18 06:12:38 +00:00
Chris Lattner
0b6ec4a6b2 simplify some code, BreakUpSubtract always returns nonnull now. 
llvm-svn: 47251
 2008-02-18 02:18:25 +00:00
Chris Lattner
2fa904b3af 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
51a663a8fe fix pasto 
llvm-svn: 47242
 2008-02-17 20:54:40 +00:00
Chris Lattner
4a34461d64 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
cd6f9cea98 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
cd0325cce1 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
01f9252f73 Fix PR2028 
llvm-svn: 47150
 2008-02-15 01:24:49 +00:00
Devang Patel
8af92b942c 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
b8bf200b77 Fix PR2029 
llvm-svn: 47129
 2008-02-14 19:18:13 +00:00
Chris Lattner
5005b4d0d8 simplify code, no functionality change. 
llvm-svn: 47116
 2008-02-14 07:39:01 +00:00
Nick Lewycky
0dd6ce5d3a Fix PR2032. Inform the alias analysis of changes to the underlying program. 
llvm-svn: 47111
 2008-02-14 07:11:24 +00:00