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34 Commits

Author SHA1 Message Date
Owen Anderson
7bef92ac7a NULL loads are only invalid in the default address space. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111972 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-24 22:00:55 +00:00
Owen Anderson
dae90c6afb Add support for inferring values for the default cases of switches. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111971 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-24 21:59:42 +00:00
Owen Anderson
c8ef750605 Add support for inferring that a load from a pointer implies that it is not null. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111959 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-24 20:47:29 +00:00
Owen Anderson
59b06dc775 Don't assume that all constants with integer types are ConstantInts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111906 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-24 07:55:44 +00:00
Owen Anderson
b81fd62a66 Use ConstantRange to propagate information through value definitions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111425 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-18 21:11:37 +00:00
Owen Anderson
00ac77ef88 Inform LazyValueInfo whenever a block is deleted, to avoid dangling pointer issues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111382 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-18 18:39:01 +00:00
Owen Anderson
4bb3eafab5 Fix another iterator invalidation that caused a *really* nasty miscompilation in 403.gcc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111210 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-16 23:42:33 +00:00
Owen Anderson
cf6abd2486 Fix a subtle use-after-free issue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110863 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-11 22:36:04 +00:00
Owen Anderson
2d0f2470ff Improve indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110778 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-11 04:24:25 +00:00
Owen Anderson
625051be7e Now that we're using ConstantRange to represent potential values, make use of that represenation to 
create constraints from comparisons other than eq/neq.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110742 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-10 23:20:01 +00:00
Owen Anderson
9f01406179 Switch over to using ConstantRange to track integral values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110714 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-10 20:03:09 +00:00
Owen Anderson
2f3ffb80fa Add ConstantRange information to the debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110598 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-09 20:50:46 +00:00
Owen Anderson
5be2e78fa1 Add the beginnings of infrastructure for range tracking. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110388 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-05 22:59:19 +00:00
Owen Anderson
db78d73d96 Split the tag and value members of LVILatticeVal in preparation for expanding the lattice to something that won't fit in two bits. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110383 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-05 22:10:46 +00:00
Owen Anderson
7f9cb744f2 Add an initial implementation of PHI translation for LazyValueInfo. This involves rolling back some 
of my earlier data structure improvements until I can ensure that there are no iterator invalidation problems.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109935 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-30 23:59:40 +00:00
Owen Anderson
81881bcd35 Revert my last two patches to LVI, which recent changes have exposed a miscompilation in. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109889 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-30 20:56:07 +00:00
Owen Anderson
e2fb451dbb Pass the queried value by argument rather than in a member, in preparation for supporting PHI translation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109701 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-28 23:50:08 +00:00
Owen Anderson
9da5c997c0 Get rid of LVIQuery as a distinct data structure, so that we don't have to initialize a new set of maps on every query. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109679 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-28 22:07:25 +00:00
Owen Anderson
9a65dc9968 Rearrange several datastructures in LazyValueInfo to improve compile time. 
This is still not perfect, but better than it was before.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109563 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-27 23:58:11 +00:00
Owen Anderson
cfa7fb6df5 Add an initial implementation of LazyValueInfo updating for JumpThreading. Disabled for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109424 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-26 18:48:03 +00:00
Owen Anderson
d13db2c59c Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109045 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-21 22:09:45 +00:00
David Greene
5d93a1fb36 Convert debug messages to use dbgs(). Generally this means 
s/errs/dbgs/g except for certain special cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92040 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-12-23 20:43:58 +00:00
Chris Lattner
d6add155a7 typo spotted by duncan. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88884 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-16 03:51:42 +00:00
Chris Lattner
800c47ec10 teach LVI to infer edge information from switch instructions. 
This allows JT to eliminate a ton of infeasible edges when
handling code like the templates in PatternMatch.h


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88869 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 20:02:12 +00:00
Chris Lattner
5553a3a510 fix a logic error that would cause LVI-JT to miscompile 
some conditionals


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88868 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 20:01:24 +00:00
Chris Lattner
e5642812d3 implement the first stab at caching queries. This isn't correct 
(because the invalidation logic is missing) but LVI isn't enabled
by default anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88867 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 20:00:52 +00:00
Chris Lattner
2c5adf832a refactor a bunch of code forming the new LazyValueInfoCache 
and LVIQuery classes, no functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88866 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-15 19:59:49 +00:00
Chris Lattner
f496e79f44 various fixes to the lattice transfer functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86952 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 04:57:13 +00:00
Chris Lattner
b52675b643 Add a new getPredicateOnEdge method which returns more rich information for 
constant constraints.  Improve the LVI lattice to include inequality 
constraints.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86950 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 04:36:58 +00:00
Chris Lattner
38392bbeb8 expose edge information and switch j-t to use it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86920 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 01:29:10 +00:00
Chris Lattner
b8c124c343 move some stuff into DEBUG's and turn on lazy-value-info for 
the basic.ll testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86918 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 01:22:16 +00:00
Chris Lattner
1697652922 make LazyValueInfo actually to some stuff. This isn't very tested but improves 
strswitch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86889 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-11 22:48:44 +00:00
Chris Lattner
cc4d3b25f3 stub out some LazyValueInfo interfaces, and have JumpThreading 
start using them in a trivial way when -enable-jump-threading-lvi
is passed.  enable-jump-threading-lvi will be my playground for 
awhile.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86789 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-11 02:08:33 +00:00
Chris Lattner
10f2d13d58 Stub out a new lazy value info pass, which will eventually 
vend value constraint information to the optimizer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86767 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-11 00:22:30 +00:00