Commit Graph

496 Commits

Author SHA1 Message Date
Andrew Trick
2e95d76f8c This test only makes sense with -enable-iv-rewrite.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139576 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-13 02:45:26 +00:00
Eli Friedman
81ac8ddc67 Fix the logic in BasicAliasAnalysis::aliasGEP for comparing GEP's with variable differences so that it actually does something sane. Fixes PR10881.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139276 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-08 02:23:31 +00:00
Owen Anderson
69acc93b3d Teach BasicAA about the aliasing properties of memset_pattern16.
Fixes PR10872 and <rdar://problem/10065079>.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139204 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-06 23:33:25 +00:00
Nick Lewycky
c103a08a11 This transform only handles two-operand AddRec's. Prevent it from trying to
handle anything more complex. Fixes PR10383 again!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139186 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-06 21:42:18 +00:00
Nick Lewycky
fa151a79ed The logic inside getMulExpr to simplify {a,+,b}*{c,+,d} was wrong, which was
visible given a=b=c=d=1, on iteration #1 (the second iteration). Replace it with
correct math. Fixes PR10383!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139133 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-06 05:05:14 +00:00
Nick Lewycky
b2840fdcd8 Revert r139126 due to selfhost failures reported by buildbots.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139130 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-06 02:43:13 +00:00
Nick Lewycky
77b7352db0 Teach SCEV to report a max backedge count in one interesting case in
HowFarToZero; the case for a canonical loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139126 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-05 23:25:16 +00:00
Rafael Espindola
aecfdd3068 Move the loads after the calls so that the fix for
PR10292 doesn't show that the loads don't alias
the allocas.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134852 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-09 23:53:58 +00:00
Rafael Espindola
4fe509431b Use CHECK-NEXT.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134850 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-09 22:56:50 +00:00
Chris Lattner
a53616d08b Remove support for parsing the "type i32" syntax for defining a numbered
top level type without a specified number.  This syntax isn't documented
and blocks forward progress.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133371 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-19 00:03:46 +00:00
Chris Lattner
b85e4eba85 rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is
for pre-2.9 bitcode files.  We keep x86 unaligned loads, movnt, crc32, and the
target indep prefetch change.

As usual, updating the testsuite is a PITA.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133337 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-18 06:05:24 +00:00
Chris Lattner
d589099eec make the asmparser reject function and type redefinitions. 'Merging' hasn't been
needed since llvm-gcc 3.4 days.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133248 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-17 07:06:44 +00:00
Chris Lattner
7a1b9bdd2b Remove support for using "foo" as symbols instead of %"foo". This is ancient
syntax and has been long obsolete.  As usual, updating the tests is the nasty
part of this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133242 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-17 06:36:20 +00:00
Chris Lattner
26b0000166 manually upgrade a bunch of tests to modern syntax, and remove some that
are either unreduced or only test old syntax.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133228 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-17 03:14:27 +00:00
John McCall
410eac5536 Test case for r132797.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132962 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-14 03:02:05 +00:00
Dan Gohman
5f1312c36e Reapply r131781, now that the GVN bug with partially-aliasing loads
is disabled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132632 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-04 06:50:18 +00:00
Dan Gohman
baddf6c8b0 Remove this test, which should have been reverted along with r131781.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132628 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-04 06:21:23 +00:00
Dan Gohman
9a9d218ed0 Revert r131781 again. Apparently there is more going on here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132625 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-04 05:11:22 +00:00
Dan Gohman
c122c625ce Reapply r131781 (revert r131809), now that some BasicAA shortcomings
it exposed are fixed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132611 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-04 00:46:31 +00:00
Dan Gohman
1fc18d71de Fix BasicAA's recursion detection so that it doesn't pessimize
queries in the case of a DAG, where a query reaches a node
visited earlier, but it's not on a cycle. This avoids
MayAlias results in cases where BasicAA is expected to
return MustAlias or PartialAlias in order to protect TBAA.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132609 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-04 00:31:50 +00:00
Dan Gohman
965fefa1ad When merging MustAlias and PartialAlias, chose PartialAlias instead
of conservatively choosing MayAlias.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132579 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-03 20:17:36 +00:00
Dan Gohman
9adf151b3d Make DecomposeGEPExpression check SimplifyInstruction only
after checking for a GEP, so that it matches what GetUnderlyingObject
does. This fixes an obscure bug turned up by bugpoint in the testcase
for PR9931.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131971 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-24 18:24:08 +00:00
Chris Lattner
4d9255057a I missed a checking with my GVN change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131851 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-22 07:20:02 +00:00
Duncan Sands
d22920aae8 Revert commit 131781, to see if it fixes the x86-64 dragonegg buildbot.
Original log message:
When BasicAA can determine that two pointers have the same base but
differ by a dynamic offset, return PartialAlias instead of MayAlias.
See the comment in the code for details. This fixes PR9971.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131809 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-21 20:54:46 +00:00
Dan Gohman
424b777171 When BasicAA can determine that two pointers have the same base but
differ by a dynamic offset, return PartialAlias instead of MayAlias.
See the comment in the code for details. This fixes PR9971.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131781 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-21 01:05:08 +00:00
Dan Gohman
1d7e818a38 Teach BasicAA about arm.neon.vld1 and vst1.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130327 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-27 20:44:28 +00:00
Dan Gohman
bddc1ca18a When analyzing functions known to only access argument pointees,
only check arguments with pointer types. Update the documentation
of IntrReadArgMem reflect this.

While here, add support for TBAA tags on intrinsic calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130317 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-27 18:39:03 +00:00
Andrew Trick
104f4adeac Test case and comment for PR9633.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130294 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-27 05:42:17 +00:00
Benjamin Kramer
a42a757176 Make tests more useful.
lit needs a linter ...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130126 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-25 10:12:01 +00:00
Eli Friedman
0e382192c1 PR9634: Don't unconditionally tell the AliasSetTracker that the PreheaderLoad
is equivalent to any other relevant value; it isn't true in general.
If it is equivalent, the LoopPromoter will tell the AST the equivalence.
Also, delete the PreheaderLoad if it is unused.

Chris, since you were the last one to make major changes here, can you check
that this is sane?



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129049 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-07 01:35:06 +00:00
Chris Lattner
1a8b9dd7fb remove postdom frontiers, because it is dead. Forward dom frontiers are
still used by RegionInfo :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128943 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-05 21:57:17 +00:00
Anders Carlsson
fa4ebd396d Revert r128140 for now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128149 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-23 15:51:12 +00:00
Anders Carlsson
90af342061 A global variable with internal linkage where all uses are in one function and whose address is never taken is a non-escaping local object and can't alias anything else.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128140 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-23 02:19:48 +00:00
Andrew Trick
c343c1e27e Propagate SCEV no-wrap flags whenever possible.
This needs review.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127638 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-15 00:37:00 +00:00
Andrew Trick
e62289b98f When SCEV can determine the loop test is X < X, set ExactBECount=0.
When ExactBECount is a constant, use it for MaxBECount.
When MaxBECount cannot be computed, replace it with ExactBECount.
Fixes PR9424.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127342 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-09 17:29:58 +00:00
Chris Lattner
8ebaf90958 teach SCEV that the scale and addition of an inbounds gep don't NSW.
This fixes a FIXME in scev-aa.ll (allowing a new no-alias result) and
generally makes things more precise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125449 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-13 03:14:49 +00:00
Chris Lattner
1021236c74 Per discussion with Dan G, inbounds geps *certainly* can have
unsigned overflow (e.g. "gep P, -1"), and while they can have
signed wrap in theoretical situations, modelling an AddRec as
not having signed wrap is going enough for any case we can 
think of today.  In the future if this isn't enough, we can
revisit this.  Modeling them as having NUW isn't causing any
known problems either FWIW.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125410 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-11 21:43:33 +00:00
Dan Gohman
640b9c8fe2 Add another rdar number.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124125 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-24 17:54:01 +00:00
Nick Lewycky
76167af9b1 Simplify some code with no functionality change. Make the test a lot more
robust against smarter optimizations, using the power of FileCheck.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124081 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-23 20:06:05 +00:00
Nick Lewycky
630d85a78c Use value ranges to fold ext(trunc) in SCEV when possible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124062 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-23 06:20:19 +00:00
Tobias Grosser
e906921480 Implement requiredTransitive
The PassManager did not implement the transitivity of requiredTransitive. This
was unnoticed since 2006.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123942 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-20 21:03:22 +00:00
Nick Lewycky
5c6fc1cab7 Similarly, analyze truncate through multiply.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123842 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-19 18:56:00 +00:00
Nick Lewycky
30aa8b13c9 Add a missed SCEV fold that is required to continue analyzing the IR produced
by indvars through the scev expander.

trunc(add x, y) --> add(trunc x, y). Currently SCEV largely folds the other way
which is probably wrong, but preserved to minimize churn. Instcombine doesn't
do this fold either, demonstrating a missed optz'n opportunity on code doing
add+trunc+add.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123838 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-19 16:59:46 +00:00
Nick Lewycky
73f565e754 Add a missing SCEV simplification sext(zext x) --> zext x.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123832 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-19 15:56:12 +00:00
Dan Gohman
615da1a9bc Teach BasicAA to return PartialAlias in cases where both pointers
are pointing to the same object, one pointer is accessing the entire
object, and the other is access has a non-zero size. This prevents
TBAA from kicking in and saying NoAlias in such cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123775 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-18 21:16:06 +00:00
Eric Christopher
48eec43fdb Revert the testcase from the previous reverted commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123227 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 09:20:44 +00:00
Chris Lattner
e70d7c2201 add a testcase I missed in previous commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123143 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 23:52:31 +00:00
Chris Lattner
6d5a2411aa teach SCEV analysis of PHI nodes that PHI recurences formed
with GEP instructions are always NUW, because PHIs cannot wrap
the end of the address space.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123105 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 02:28:48 +00:00
Chris Lattner
f1859891b7 reduce indentation. Print <nuw> and <nsw> when dumping SCEV AddRec's
that have the bit set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123104 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 02:16:18 +00:00
Chris Lattner
895ace08e0 fix rdar://8813415 - a miscompilation of 164.gzip that loop-idiom
exposed.  It turns out to be a latent bug in basicaa, scary.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122772 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03 21:03:33 +00:00