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Author SHA1 Message Date
Evan Cheng
cf4d5567d5 If all sources of a PHI node are defined by an implicit_def, just emit an implicit_def instead of a copy. 
llvm-svn: 50927
 2008-05-10 00:17:50 +00:00
Bill Wendling
89c91f81ae Cosmetic changes: 
- Comment fixes.
 - Moar whitespace.
 - Made ivars "private" by default.
No functionality change.

llvm-svn: 50926
 2008-05-10 00:12:52 +00:00
Evan Cheng
2adea48f7e Add a pattern to do move the low element of a v4f32 and zero extend the rest. 
llvm-svn: 50922
 2008-05-09 23:37:55 +00:00
Dale Johannesen
a422bcbec2 Remove an evil vector bool. Cosmetic refactoring, 
no functional change.

llvm-svn: 50921
 2008-05-09 23:28:24 +00:00
Evan Cheng
3493e43afd Handle a few more cases of folding load i64 into xmm and zero top bits. 
Note, some of the code will be moved into target independent part of DAG combiner in a subsequent patch.

llvm-svn: 50918
 2008-05-09 21:53:03 +00:00
Evan Cheng
f87942325f Make OpActionsCapacity multiple of 4. 
llvm-svn: 50917
 2008-05-09 21:50:23 +00:00
Dale Johannesen
09a45f2ca3 Rewrite tail merging algorithm to handle the 
case where there are multiple blocks with a large
number of common tail instructions more efficiently
(compile time optimization).

llvm-svn: 50916
 2008-05-09 21:24:35 +00:00
Torok Edwin
9b85a8dc92 put LibCallAliasAnalysis into anonymous namespace to avoid 
clashes on ::X

llvm-svn: 50912
 2008-05-09 20:35:45 +00:00
Evan Cheng
a0688bf1cb Simplify test. 
llvm-svn: 50911
 2008-05-09 19:56:32 +00:00
Mikhail Glushenkov
216a541699 Rename Example.td to Graph.td. 
llvm-svn: 50910
 2008-05-09 19:11:28 +00:00
Nick Kledzik
14848b7675 use doxygen comments for makeBuffer() 
llvm-svn: 50908
 2008-05-09 18:44:41 +00:00
Chris Lattner
b6db834a47 don't sink invokes, even if they are readonly. This fixes a 
crash on kimwitu++.

llvm-svn: 50901
 2008-05-09 15:07:33 +00:00
Duncan Sands
dd33da4795 Fix a type and formatting. 
llvm-svn: 50900
 2008-05-09 12:20:10 +00:00
Mikhail Glushenkov
ac930296dd Reapply 50867: A small refactoring (extract method) + some comment fixes. 
Fixed the build breakage, sorry for that.

llvm-svn: 50895
 2008-05-09 08:27:26 +00:00
Chris Lattner
69724eed32 add support for pattern matching 'neg' 
llvm-svn: 50883
 2008-05-09 05:20:27 +00:00
Chris Lattner
02ca137915 Implement PR2298. This transforms: 
~x < ~y --> y < x
   -x == -y --> x == y

llvm-svn: 50882
 2008-05-09 05:19:28 +00:00
Chris Lattner
8ec87dd865 restore doxygen comment. 
llvm-svn: 50881
 2008-05-09 04:43:13 +00:00
Nick Kledzik
8bfd104963 <rdar://problem/5917641> use getMemBufferCopy if supplied buffer is not already zero terminated 
llvm-svn: 50880
 2008-05-09 01:09:59 +00:00
Anton Korobeynikov
0f467b9965 Check for validity of aliasee pointer before dereference. 
llvm-svn: 50878
 2008-05-08 23:11:06 +00:00
Evan Cheng
f824b47188 Use movq to move low half of XMM register and zero-extend the rest. 
llvm-svn: 50874
 2008-05-08 22:35:02 +00:00
Chris Lattner
e3970f1e95 conservatively say that volatile stores read memory. 
llvm-svn: 50872
 2008-05-08 21:58:49 +00:00
Tanya Lattner
56baa19bfb Revertin 50867 since it was breaking the build. 
llvm-svn: 50871
 2008-05-08 21:54:20 +00:00
Chris Lattner
1e4afe8fa7 store can't read from memory. 
llvm-svn: 50869
 2008-05-08 21:47:43 +00:00
Mikhail Glushenkov
c6482c5b8a Add -E and -S options 
llvm-svn: 50868
 2008-05-08 20:02:36 +00:00
Mikhail Glushenkov
49359aa3b3 A small refactoring (extract method) + some comment fixes. 
llvm-svn: 50867
 2008-05-08 20:02:03 +00:00
Chris Lattner
dfd5ee9b42 Remove dead return. Thanks to Bill for the review! 
llvm-svn: 50863
 2008-05-08 18:26:56 +00:00
Gordon Henriksen
846171a09e Improve pass documentation and comments. 
Patch by Matthijs Kooijman!

llvm-svn: 50861
 2008-05-08 17:46:35 +00:00
Chris Lattner
4c1ef3628b More than just loads can read from memory: readonly calls like strlen 
also need to be checked for memory modifying instructions before we
can sink them.  THis fixes the second half of PR2297.

llvm-svn: 50860
 2008-05-08 17:37:37 +00:00
Chris Lattner
cba8b4c7e8 Make instcombine's DSE respect loads as well as stores. It is not safe to 
delete the first store in:

store x -> p
load p
store y -> p

This is for PR2297.

llvm-svn: 50859
 2008-05-08 17:20:30 +00:00
Chris Lattner
3c362081d5 add a new Instruction::mayReadFromMemory predicate, make 
Instruction::mayWriteToMemory stronger for invokes.

llvm-svn: 50858
 2008-05-08 17:16:51 +00:00
Devang Patel
3dce0e9d2e Check linkage. 
llvm-svn: 50851
 2008-05-08 15:08:39 +00:00
Duncan Sands
5775b74165 Get exception handling working again on 64 bit 
Darwin.  This is a hack of course, but it does
at least look at the right thing: gotpcrel means
that this is already an offset, so an explicit
offset is not needed (and wrong).  I think this
is good enough for the moment: Anton is working
on something better.

llvm-svn: 50850
 2008-05-08 12:33:11 +00:00
Chris Lattner
9bf499a8b9 new testcase. 
llvm-svn: 50841
 2008-05-08 04:55:51 +00:00
Chris Lattner
9011ceba89 Add support for constant folding the 'offsetof' pattern even if the 
base is not zero.  This fixes test/C++Frontend/2008-05-07-CrazyOffsetOf.cpp

llvm-svn: 50840
 2008-05-08 04:54:43 +00:00
Evan Cheng
f97e716511 Handle vector move / load which zero the destination register top bits (i.e. movd, movq, movss (addr), movsd (addr)) with X86 specific dag combine. 
llvm-svn: 50838
 2008-05-08 00:57:18 +00:00
Evan Cheng
7ff000c175 Add nounwind. 
llvm-svn: 50837
 2008-05-07 22:59:08 +00:00
Anton Korobeynikov
ddb93e7a02 Turn StripPointerCast() into a method 
llvm-svn: 50836
 2008-05-07 22:54:15 +00:00
Mikhail Glushenkov
7e401e5002 Use Doxygen-style comments. 
llvm-svn: 50833
 2008-05-07 21:50:19 +00:00
Ted Kremenek
1534cce257 Make the interface of CStrInCStrNoCase be the same as strcasestr. 
llvm-svn: 50828
 2008-05-07 20:04:18 +00:00
Chris Lattner
3ee18d7c51 Add a new LibCallAliasAnalysis pass, which is parameterized 
by an instance of LibCallInfo to provide mod/ref info of
standard library functions.  This is powerful enough to
say that 'sqrt' is readonly except that it modifies errno,
or that "printf doesn't store to memory unless the %n
constraint is present" etc.

llvm-svn: 50827
 2008-05-07 19:53:05 +00:00
Ted Kremenek
b82fe559d6 Fix some serious logical errors in CStrInCStrNoCase pointed out by Bill. 
llvm-svn: 50826
 2008-05-07 19:22:36 +00:00
Duncan Sands
6f4e916c6a Output correct exception handling and frame info 
on x86-64 linux.  This causes no regressions on
32 bit linux and 32 bit ppc.  More tests pass
on 64 bit ppc with no regressions.  I didn't
turn on eh on 64 bit linux because the intrinsics
needed to compile the eh runtime aren't done
yet.  But if you turn it on and link with the
mainline runtime then eh seems to work fine
on x86-64 linux with this patch.  Thanks to
Dale for testing.  The main point of the patch
is that if you output that some object is
encoded using 4 bytes you had better not output
8 bytes for it: the patch makes everything
consistent.

llvm-svn: 50825
 2008-05-07 19:11:09 +00:00
Ted Kremenek
cbaf12a084 Guard for empty strings in CStrInCStrNoCase. 
llvm-svn: 50823
 2008-05-07 18:49:31 +00:00
Ted Kremenek
535ed35152 Added CStrInCStrNoCase, a portable implementation of strcasestr. 
llvm-svn: 50821
 2008-05-07 18:35:46 +00:00
Chris Lattner
e70ff7b21c Add a new interface for describing the behavior of library calls. This 
Currently is sufficient to describe mod/ref behavior but will hopefully
eventually be extended for other purposes.

This isn't used by anything yet.

llvm-svn: 50820
 2008-05-07 18:21:13 +00:00
Nick Lewycky
adfc627b77 Typo. 
llvm-svn: 50805
 2008-05-07 06:39:04 +00:00
Evan Cheng
c86c035346 Yet another nasty spiller bug. 
%ecx = op
store %cl<kill>, (addr)
(addr) = op %al

It's not safe to unfold the last operand and eliminate store even though %cl is marked kill. It's a sub-register use which means one of its super-register(s) may be used below.

llvm-svn: 50794
 2008-05-07 00:49:28 +00:00
Dan Gohman
6ea87fa437 Fix a bug in the ComputeMaskedBits logic for multiply. 
llvm-svn: 50793
 2008-05-07 00:35:55 +00:00
Bill Wendling
a7619e13ed Make the use of the "noinline" attribute conditional on using GCC. 
llvm-svn: 50789
 2008-05-07 00:00:34 +00:00
Owen Anderson
3743bcf042 Disable loop deletion until the release branch. 
llvm-svn: 50787
 2008-05-06 23:56:34 +00:00