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407 Commits

Author SHA1 Message Date
Bill Wendling 68a930b33e The inst combining of inttoptr into GEP with one index was using the bit size of 
the type instead of the byte size. This was causing troublesome mis-compilations.

True to form, this took 2 days to find and is a one-line fix. :-P

llvm-svn: 48354
 2008-03-14 05:12:19 +00:00
Owen Anderson 7a69e3aef3 Fix a bug in GVN that Duncan noticed, where we potentially need to insert a 
pointer bitcast when performing return slot optimization.

llvm-svn: 48343
 2008-03-13 22:07:10 +00:00
Owen Anderson 6ff0b822b4 Improve the return slot optimization to be both more aggressive (not limited to sret parameters), and 
safer (when the passed pointer might be invalid).  Thanks to Duncan and Chris for the idea behind this, 
and extra thanks to Duncan for helping me work out the trap-safety.

llvm-svn: 48280
 2008-03-12 07:37:44 +00:00
Devang Patel fa8667a2dd Fix attribute handling. 
llvm-svn: 48262
 2008-03-12 00:07:03 +00:00
Devang Patel 7358165c99 Handle multiple ret values. 
llvm-svn: 48254
 2008-03-11 22:24:29 +00:00
Dan Gohman 20af5a0fe7 Check to see if a two-entry PHI block can be simplified 
before trying to merge the block into its predecessors.
This allows two-entry-phi-return.ll to be simplified
into a single basic block.

llvm-svn: 48252
 2008-03-11 21:53:06 +00:00
Dan Gohman 8e9ae96a4a Make this test more challenging to help it avoid being 
optimized away before it tests what it is intended to test.

llvm-svn: 48251
 2008-03-11 21:47:57 +00:00
Devang Patel a7a2075ab8 Initial multiple return values support. 
llvm-svn: 48210
 2008-03-11 05:46:42 +00:00
Dan Gohman 319234d67c Upgrade this test. 
llvm-svn: 48207
 2008-03-11 02:19:59 +00:00
Devang Patel 741f491d90 Simplify 
llvm-svn: 48163
 2008-03-10 18:38:30 +00:00
Tanya Lattner 5f4b355f20 Remove llvm-upgrade and update tests. 
llvm-svn: 48137
 2008-03-10 07:21:50 +00:00
Nick Lewycky fb2c1a999a Turn unwind_to into "unwinds to". 
llvm-svn: 48123
 2008-03-10 02:20:00 +00:00
Tanya Lattner aa6f5c9ddd Remove llvm-upgrade and update tests. 
llvm-svn: 48103
 2008-03-09 08:16:40 +00:00
Nick Lewycky 42445be0df Firstly, having a BranchInst isn't exclusive with having an unwind_to. 
Secondly, we have to check whether the branch is actually pointing to the block
with the unwind in it. We could have gotten here because of the unwind_to alone.

llvm-svn: 48099
 2008-03-09 07:50:37 +00:00
Nick Lewycky f3d637fa14 A BB that unwind_to an "unwind" inst is that same as one that doesn't unwind_to 
at all.

llvm-svn: 48096
 2008-03-09 07:36:38 +00:00
Nick Lewycky 5ce9b521d7 Update the inliner and simplifycfg to handle unwind_to. 
llvm-svn: 48086
 2008-03-09 05:10:13 +00:00
Nick Lewycky 4d0ed842b1 Prune the unwind_to labels on BBs that don't need them. Another step in the 
removal of invoke, PR1269.

llvm-svn: 48084
 2008-03-09 04:55:16 +00:00
Devang Patel 780b3ca64b Update inliner to handle functions that return multiple values. 
llvm-svn: 48020
 2008-03-07 20:06:16 +00:00
Devang Patel 47d774b2c8 Place for sret promotion tests. 
llvm-svn: 48016
 2008-03-07 20:00:15 +00:00
Nick Lewycky 3e2d7c9f85 Commit the testcase too. 
llvm-svn: 47988
 2008-03-06 06:50:03 +00:00
Nick Lewycky d0b62a1552 Don't try to simplify urem and srem using arithmetic rules that don't work 
under modulo (overflow). Fixes PR1933.

llvm-svn: 47987
 2008-03-06 06:48:30 +00:00
Devang Patel 941ab37ea8 Use cast instead of dyn_cast. 
Update test to use multiple return value directly, instead of relying on -sretpromotion.

llvm-svn: 47907
 2008-03-04 21:45:28 +00:00
Devang Patel 841322b32a Handle multiple return values. 
llvm-svn: 47904
 2008-03-04 21:15:15 +00:00
Tanya Lattner 5640bd186a Remove llvm-upgrade and update test cases. 
llvm-svn: 47793
 2008-03-01 09:15:35 +00:00
Chris Lattner c966cebe93 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 c612571555 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 e41c19c987 Add PR number to testcase. 
llvm-svn: 47640
 2008-02-26 23:16:11 +00:00
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
Chris Lattner a39cff3aaa fix this test so that the fn name doesn't match the regex 
llvm-svn: 47608
 2008-02-26 18:13:51 +00:00
Gabor Greif 3d9755f6ca Really feed llvm-as with the testcase, do not let it read from stdin. This fixes the hangs seen on solaris10. 
llvm-svn: 47604
 2008-02-26 13:37:13 +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
Zhou Sheng aae582ba99 Testcase for Revision 47478. 
llvm-svn: 47531
 2008-02-23 10:59:51 +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 23fe6630e3 make this just a bit more strict. 
llvm-svn: 47274
 2008-02-18 17:33:10 +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 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 c8ec470b52 upgrade this test. 
llvm-svn: 47257
 2008-02-18 06:11:00 +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 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 2de8c2d41f upgrade and simplify this test. 
llvm-svn: 47240
 2008-02-17 20:48:43 +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 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
Nick Lewycky 9592bb0390 Testcase for PR2032. 
llvm-svn: 47113
 2008-02-14 07:15:11 +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
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
Eli Friedman 460648abde Add a note pointing to PR1996. 
llvm-svn: 47055
 2008-02-13 07:56:04 +00:00
Eli Friedman 03ec63f29d Add test for PR1996. (This is my first time adding a test for a 
transform, so please review.)

llvm-svn: 47050
 2008-02-13 06:55:57 +00:00