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3625 Commits

Author SHA1 Message Date
Dan Gohman
0f2de01355 Hold AddRec->getLoop() in a variable, to make the Mul code more consistent 
with the Add code.

llvm-svn: 112430
 2010-08-29 14:55:19 +00:00
Dan Gohman
028c18158a Rename a variable, for consistency. 
llvm-svn: 112429
 2010-08-29 14:53:34 +00:00
Dan Gohman
28a84d4ba1 Use iterators instead of indices. 
llvm-svn: 112428
 2010-08-29 14:52:02 +00:00
Chris Lattner
dc8070ed6d when merging two alias sets, the result set is volatile if either 
of the sets is volatile.  We were dropping the volatile bit of the
merged in set, leading (luckily) to assertions in cases like 
PR7535.  I cannot produce a testcase that repros with opt, but this
is obviously correct.

llvm-svn: 112402
 2010-08-29 04:14:47 +00:00
Chris Lattner
eef6b19dcb more cleanup 
llvm-svn: 112401
 2010-08-29 04:13:43 +00:00
Chris Lattner
afb7074f18 clean this up 
llvm-svn: 112400
 2010-08-29 04:06:55 +00:00
Dan Gohman
fe22f1d3cc Fix an index calculation thinko. 
llvm-svn: 112337
 2010-08-28 00:39:27 +00:00
Owen Anderson
38f6b7fe3b Improve the precision of getConstant(). 
llvm-svn: 112323
 2010-08-27 23:29:38 +00:00
Dan Gohman
15871f23e3 When merging adjacent operands, scan ahead and merge all equal 
adjacent operands at once, instead of just two at a time.

llvm-svn: 112299
 2010-08-27 21:39:59 +00:00
Dan Gohman
c866bf4fec Make the {A,+,B}<L> + {C,+,D}<L> --> Other + {A+C,+,B+D}<L> 
transformation collect all the addrecs with the same loop
add combine them at once rather than starting everything over
at the first chance.

llvm-svn: 112290
 2010-08-27 20:45:56 +00:00
Dan Gohman
9bad2fb378 Switch ScalarEvolution's main Value*->SCEV* map from std::map 
to DenseMap.

llvm-svn: 112281
 2010-08-27 18:55:03 +00:00
Owen Anderson
6ebbd92380 Use LVI to eliminate conditional branches where we've tested a related condition previously. Update tests for this change. 
This fixes PR5652.

llvm-svn: 112270
 2010-08-27 17:12:29 +00:00
Dan Gohman
2706567c5c Optimize SCEVComplexityCompare. Use a 3-way return instead of a 2-way 
return to avoid needing two calls to test for equivalence, and sort
addrecs by their degree before examining their operands.

llvm-svn: 112267
 2010-08-27 15:26:01 +00:00
Owen Anderson
4afea9e3c6 In the default address space, any GEP off of null results in a trap value if you try to load it. Thus, 
any load in the default address space that completes implies that the base value that it GEP'd from
was not null.

llvm-svn: 112015
 2010-08-25 01:16:47 +00:00
Owen Anderson
a10000006e NULL loads are only invalid in the default address space. 
llvm-svn: 111972
 2010-08-24 22:00:55 +00:00
Owen Anderson
b695c83de9 Add support for inferring values for the default cases of switches. 
llvm-svn: 111971
 2010-08-24 21:59:42 +00:00
Owen Anderson
da34de1599 Add support for inferring that a load from a pointer implies that it is not null. 
llvm-svn: 111959
 2010-08-24 20:47:29 +00:00
Owen Anderson
c62f704576 Don't assume that all constants with integer types are ConstantInts. 
llvm-svn: 111906
 2010-08-24 07:55:44 +00:00
Devang Patel
dd719f701d Let FE use derived types for DW_TAG_friend. 
Patch by Alexander Herz!

llvm-svn: 111861
 2010-08-23 23:16:25 +00:00
Devang Patel
a8652674e0 Handle qualified constants that are directly folded by FE. 
PR 7920.

llvm-svn: 111820
 2010-08-23 18:25:56 +00:00
Owen Anderson
d31d82d75c Now that PassInfo and Pass::ID have been separated, move the rest of the passes over to the new registration API. 
llvm-svn: 111815
 2010-08-23 17:52:01 +00:00
Dan Gohman
5fc55dc3cf CreateTemporaryType doesn't needs its Context argument. 
llvm-svn: 111687
 2010-08-20 22:39:47 +00:00
Dan Gohman
16a5d98c3a Introduce a new temporary MDNode concept. Temporary MDNodes are 
not part of the IR, are not uniqued, and may be safely RAUW'd.
This replaces a variety of alternate mechanisms for achieving
the same effect.

llvm-svn: 111681
 2010-08-20 22:02:26 +00:00
Dan Gohman
a931605647 Convert DbgInfoPrinter to use errs() instead of outs(). 
llvm-svn: 111659
 2010-08-20 18:03:05 +00:00
Dan Gohman
f71c521fb7 Revert r111199; it breaks -debug-pass=Structure output. 
llvm-svn: 111500
 2010-08-19 01:29:07 +00:00
Chris Lattner
3decde9305 refix PR1143 by making basicaa analyze zexts of indices aggresively, 
which I broke with a recent patch.

llvm-svn: 111452
 2010-08-18 23:09:49 +00:00
Chris Lattner
26403acef7 GetLinearExpression is only called when TD is non-null, pass as 
a reference instead of pointer.

llvm-svn: 111445
 2010-08-18 22:52:09 +00:00
Chris Lattner
1b9c38796e rework GEP decomposition to make a new VariableGEPIndex struct instead of 
using a pair.  This tidies up the code a bit.  While setting things up, add
a (currently unused) field to keep track of how the value is extended.

llvm-svn: 111444
 2010-08-18 22:47:56 +00:00
Chris Lattner
9f7500f57b move gep decomposition out of ValueTracking into BasicAA. The form of 
decomposition that it is doing is very basicaa specific and is only used
by basicaa.

Now with less tree breakingness.

llvm-svn: 111433
 2010-08-18 22:07:29 +00:00
Owen Anderson
80d19f0905 Use ConstantRange to propagate information through value definitions. 
llvm-svn: 111425
 2010-08-18 21:11:37 +00:00
Daniel Dunbar
fbeeb130d8 Revert r111375, "move gep decomposition out of ValueTracking into BasicAA. The 
form of", it doesn't pass tests.

llvm-svn: 111385
 2010-08-18 18:43:08 +00:00
Owen Anderson
208636fa33 Inform LazyValueInfo whenever a block is deleted, to avoid dangling pointer issues. 
llvm-svn: 111382
 2010-08-18 18:39:01 +00:00
Chris Lattner
54fe883203 move gep decomposition out of ValueTracking into BasicAA. The form of 
decomposition that it is doing is very basicaa specific and is only used
by basicaa.

llvm-svn: 111375
 2010-08-18 18:22:17 +00:00
Chris Lattner
a33edcb56c fix PR7589: In brief: 
gep P, (zext x) != gep P, (sext x)

DecomposeGEPExpression was getting this wrong, confusing
basicaa.

llvm-svn: 111352
 2010-08-18 04:28:19 +00:00
Dan Gohman
ed2b005842 Tweak IVUsers' concept of "interesting" to exclude add recurrences 
where the step value is an induction variable from an outer loop, to
avoid trouble trying to re-expand such expressions. This effectively
hides such expressions from indvars and lsr, which prevents them
from getting into trouble.

llvm-svn: 111317
 2010-08-17 22:50:37 +00:00
Owen Anderson
fa7d44687f Fix another iterator invalidation that caused a *really* nasty miscompilation in 403.gcc. 
llvm-svn: 111210
 2010-08-16 23:42:33 +00:00
Dan Gohman
55cd6aadc9 Make dumpPassStructure be a PMDataManager abstraction, rather than 
a Pass abstraction, since that's the level it's actually used at.
Rename Pass' dumpPassStructure to dumpPass.

This eliminates an awkward use of getAsPass() to convert a PMDataManager*
into a Pass* just to permit a dumpPassStructure call.

llvm-svn: 111199
 2010-08-16 22:45:12 +00:00
Dan Gohman
797a1dbb1c To create a copy of a SmallVector with an element removed from the 
middle, copy the elements in two groups, rather than copying all the
elements and then doing an erase on the middle of the result. These
are SmallVectors, so we shouldn't expect to hit dynamic allocation
in the common case.

llvm-svn: 111151
 2010-08-16 16:57:24 +00:00
Dan Gohman
0d0cc18af5 Tidy whitespace. 
llvm-svn: 111147
 2010-08-16 16:34:09 +00:00
Dan Gohman
c29eeaecec Add a comment. 
llvm-svn: 111145
 2010-08-16 16:31:39 +00:00
Dan Gohman
7eac4961d7 Use const_iterator in a few places. 
llvm-svn: 111144
 2010-08-16 16:30:01 +00:00
Dan Gohman
74c61503b1 Use iterators instead of indices in a few more places. 
llvm-svn: 111143
 2010-08-16 16:27:53 +00:00
Dan Gohman
f29618236e Micro-optimize SCEVConstant comparison. 
llvm-svn: 111142
 2010-08-16 16:25:35 +00:00
Dan Gohman
3688ea5c7d Move SCEVNAryExpr's virtual member functions out of line, and convert 
them to iterators.

llvm-svn: 111140
 2010-08-16 16:21:27 +00:00
Dan Gohman
d6925bbe0d Use iterators instead of indices in simple cases. 
llvm-svn: 111138
 2010-08-16 16:16:11 +00:00
Dan Gohman
b6c773ec2e Avoid gratuitous inefficiency in ifndef NDEBUG code. 
llvm-svn: 111137
 2010-08-16 16:13:54 +00:00
Dan Gohman
e5fb1036e6 Make one getAddExpr call when analyzing a+b+c+d+e+... instead of one 
for each add instruction. Ditto for Mul.

llvm-svn: 111136
 2010-08-16 16:03:49 +00:00
Dan Gohman
b094b39111 Delete an unused function. 
llvm-svn: 111135
 2010-08-16 15:57:14 +00:00
Dan Gohman
fb83b043eb Revert r111058, the lint check for indirectbr successors that aren't 
address-taken. This can occur normally, if the code which took the
address got DCEd.

llvm-svn: 111121
 2010-08-16 14:39:19 +00:00
Argyrios Kyrtzidis
d0fcc9a818 Revert r111082. No warnings for this common pattern. 
llvm-svn: 111102
 2010-08-15 10:27:23 +00:00