Commit Graph

61 Commits

Author SHA1 Message Date
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