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467 Commits

Author SHA1 Message Date
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
Chris Lattner
135bf42187 filecheckize 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122771 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-03 21:01:26 +00:00
Dan Gohman
a4bdf2ea48 -enable-tbaa is on by default now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121945 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-16 02:53:48 +00:00
Dan Gohman
387f28aff4 Make memcpyopt TBAA-aware. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121944 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-16 02:51:19 +00:00
Duncan Sands
fea3b218d6 Move Sub simplifications and additional Add simplifications out of 
instcombine and into InstructionSimplify.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121861 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-15 14:07:39 +00:00
Dan Gohman
0f7f194416 Reapply r121520, PartialAlias implementation for BasicAA, now that 
memdep is updated to handle it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121725 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-13 22:50:24 +00:00
Dan Gohman
839c092548 Revert r121520, which may have introduced miscompilations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121573 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-10 21:48:28 +00:00
Dan Gohman
3bd5e52676 Implement PartialAlias checking in BasicAA. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121520 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-10 20:47:03 +00:00
Chris Lattner
9fd9f9fd57 remove fixme comment too. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120493 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-30 23:25:01 +00:00
Chris Lattner
7fd16cef85 check in *all* files. This is now handled by my previous DSE commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120492 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-30 23:23:59 +00:00
NAKAMURA Takumi
86c817e9d4 test: Check the feature 'loadable_module' with load modules in %llvmshlibdir. 
%llvmshlibdir should be 'bin' on Cygming.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120282 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-29 07:58:32 +00:00
Dan Gohman
32d1fe52e2 Delete unneeded ssp attributes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118836 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-11 21:08:46 +00:00
Dan Gohman
56653f0df8 TBAA-enable ArgumentPromotion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118804 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-11 18:09:32 +00:00
Dan Gohman
5aae3dcb53 Make Sink tbaa-aware. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118788 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-11 16:21:47 +00:00
Dan Gohman
f00833c401 Add a testcase which demonstrates alias analysis pass precedence. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118755 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-11 01:03:30 +00:00
Dan Gohman
733c54da1e Fully invalidate cached results when a prior query's size or 
type is insufficient for, or incompatible with, the current query.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118721 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-10 21:45:11 +00:00
Dan Gohman
4cf0dcfb44 Teach FunctionAttrs about the VAArg instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118627 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-09 20:17:38 +00:00
Dan Gohman
e5dd6624ea Add a testcase for a call which BasicAA says only accesses memory through 
its arguments and which TBAA says doesn't write to memory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118439 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-08 20:20:11 +00:00
Dan Gohman
ea8900f5df Make FunctionAttrs TBAA-aware. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118417 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-08 17:12:04 +00:00
Dan Gohman
cd5c123a1d Teach memdep to use pointsToConstantMemory to determine that loads 
from constant memory don't alias any stores.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117636 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-29 01:14:04 +00:00
Dan Gohman
b338bcb0b4 Add a basic testcase for TBAA-aware DSE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117632 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-29 00:54:02 +00:00
Dan Gohman
561ac17d20 Add some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116957 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-20 22:04:02 +00:00
Dan Gohman
fb8096dee5 Don't pass the raw invalid pointer used to represent conflicting 
TBAA information to AliasAnalysis.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116751 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 21:28:00 +00:00
Dan Gohman
992ac3e6c6 Add a basic testcase for TBAA-aware LICM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116745 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 21:00:09 +00:00
Dan Gohman
bdcbf6152b Run tbaa before basicaa, since that's how it's expected to be used. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116731 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 18:45:59 +00:00
Dan Gohman
01b58f637c Make TypeBasedAliasAnalysis default to doing nothing, with a command-line 
option to enable it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116722 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 18:17:47 +00:00
Dan Gohman
c1be92f3bb Make BasicAliasAnalysis a normal AliasAnalysis implementation which 
does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.

Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.

Update tests to explicitly request -basicaa.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116720 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-18 18:04:47 +00:00
Dan Gohman
c015723131 Add a simple testcase for tbaa. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116272 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-11 23:54:13 +00:00
Benjamin Kramer
3e45b77612 Remove PointerTracking tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115072 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-29 19:20:35 +00:00
Eli Friedman
39e30124e5 PR7959: Handle negative scales in GEPs correctly in BasicAA for non-64-bit 
targets.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114015 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-15 20:08:03 +00:00