ad48e01eef
Add completely hokey binary-and and binary-or operations to ConstantRange and
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teach LazyValueInfo to use them.
llvm-svn: 113196
2010-09-07 05:39:02 +00:00
a35462da3d
Add a new isSignWrappedSet() method to ConstantRange.
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Fix zeroExtend and signExtend to support empty sets, and to return the smallest
possible result set which contains the extension of each element in their
inputs. For example zext i8 [100, 10) to i16 is now [0, 256), not i16 [100, 10)
which contains 63446 members.
llvm-svn: 113187
2010-09-06 23:52:49 +00:00
d385c22cf3
Clean up ConstantRange a bit:
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- remove ashr which never worked.
- fix lshr and shl and add tests.
- remove dead function "intersect1Wrapped".
- add a new sub method to subtract ranges, with test.
llvm-svn: 110861
2010-08-11 22:04:36 +00:00
a5a3ff586f
Remove layering violation.
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llvm-svn: 110505
2010-08-07 06:01:13 +00:00
1a9078b862
Add an inverse() method to ConstantRange.
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llvm-svn: 110504
2010-08-07 05:47:46 +00:00
07d0637000
Add a convenience constructor.
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llvm-svn: 110493
2010-08-07 00:42:06 +00:00
3f8ed9e1ae
Fix a typo that several people pointed out. Also, address the case of
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wrapping that Duncan pointed out.
llvm-svn: 94547
2010-01-26 15:56:18 +00:00
5325efc5af
Add a comment about a missed opportunity.
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llvm-svn: 94507
2010-01-26 04:13:15 +00:00
837ada7692
Print empty and full sets specially.
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llvm-svn: 94506
2010-01-26 04:12:55 +00:00
de7b353652
Change errs() to dbgs().
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llvm-svn: 92638
2010-01-05 01:28:32 +00:00
f8fcac7470
fix crash in my previous patch
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llvm-svn: 86987
2009-11-12 15:10:33 +00:00
60d5b1cfdb
implement shl, ashr, and lshr methods. shl is not fully implemented as it is quite tricky.
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llvm-svn: 86986
2009-11-12 14:53:53 +00:00
640eb70bee
add zextOrTrunc and sextOrTrunc methods, that are similar to the ones in APInt
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llvm-svn: 86549
2009-11-09 15:36:28 +00:00
1362602eb2
Change Pass::print to take a raw ostream instead of std::ostream,
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update all code that this affects.
llvm-svn: 79830
2009-08-23 06:03:38 +00:00
567daf3ce8
Fix ConstantRange::unionWith. Also make it work a little hard in some cases to
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return the smallest union of two ranges instead of just any range that happens
to contain the union.
llvm-svn: 76360
2009-07-19 03:44:35 +00:00
0d13903563
Replace intersectWith with maximalIntersectWith. The latter guarantees that
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all values belonging to the intersection will belong to the resulting range.
The former was inconsistent about that point (either way is fine, just pick
one.) This is part of PR4545.
llvm-svn: 76289
2009-07-18 06:34:42 +00:00
571bf54569
Fix an error in ConstantRange::getSignedMax on wrapped ranges. Thanks once
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again to Daniel Dunbar and KLEE!
llvm-svn: 75449
2009-07-13 04:50:21 +00:00
5edc459220
'i8 full-range' sign extended to i16 should equal [-128, 128) not [-128, 127).
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Found by Daniel Dunbar and KLEE.
llvm-svn: 75448
2009-07-13 04:17:23 +00:00
5302389442
Multiply was very wrong for wrapped ranges. This supplies a half-fix that will
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generally return Full on all wrapped inputs. "Fixes" PR4545.
llvm-svn: 75444
2009-07-13 03:27:41 +00:00
73b704dd9c
Fix a bug summing two full sets. The overflow checking doesn't handle sets as
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large as the full set, only those one size smaller. Thanks to Daniel Dunbar
who found this bug using Klee!
llvm-svn: 75443
2009-07-13 02:49:08 +00:00
f1b8cb3760
Implement udiv for ConstantRanges.
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llvm-svn: 75413
2009-07-12 05:18:18 +00:00
2951c990cd
Implement ConstantRange::multiply based on the code in LoopVR.
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llvm-svn: 75410
2009-07-12 02:19:05 +00:00
fc69ee2cc6
Fix handling of max and full set.
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A full set is a constant range that represents any number. If you take the
umax of that and [5, 10) you end up with [5, INT_MAX] because the values less
than 5 would be umax's against a value which is at least 5.
llvm-svn: 75372
2009-07-11 19:22:21 +00:00
9c5fc41547
Clarify and simplify.
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llvm-svn: 75366
2009-07-11 17:04:01 +00:00
dcfdce9067
Move a method that creates constant ranges relative to another constant range
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per icmp predicate out of predsimplify and into ConstantRange.
Add another utility method that determines whether one range is a subset of
another. Combine with the former to determine whether icmp pred range, range
is known to be true or not.
llvm-svn: 75357
2009-07-11 06:15:39 +00:00
Nick Lewycky
Owen Anderson
Dan Gohman
David Greene
Nuno Lopes
Chris Lattner