38f6b7fe3b
Improve the precision of getConstant().
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llvm-svn: 112323
2010-08-27 23:29:38 +00:00
6ebbd92380
Use LVI to eliminate conditional branches where we've tested a related condition previously. Update tests for this change.
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This fixes PR5652.
llvm-svn: 112270
2010-08-27 17:12:29 +00:00
4afea9e3c6
In the default address space, any GEP off of null results in a trap value if you try to load it. Thus,
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any load in the default address space that completes implies that the base value that it GEP'd from
was not null.
llvm-svn: 112015
2010-08-25 01:16:47 +00:00
a10000006e
NULL loads are only invalid in the default address space.
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llvm-svn: 111972
2010-08-24 22:00:55 +00:00
b695c83de9
Add support for inferring values for the default cases of switches.
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llvm-svn: 111971
2010-08-24 21:59:42 +00:00
da34de1599
Add support for inferring that a load from a pointer implies that it is not null.
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llvm-svn: 111959
2010-08-24 20:47:29 +00:00
c62f704576
Don't assume that all constants with integer types are ConstantInts.
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llvm-svn: 111906
2010-08-24 07:55:44 +00:00
80d19f0905
Use ConstantRange to propagate information through value definitions.
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llvm-svn: 111425
2010-08-18 21:11:37 +00:00
208636fa33
Inform LazyValueInfo whenever a block is deleted, to avoid dangling pointer issues.
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llvm-svn: 111382
2010-08-18 18:39:01 +00:00
fa7d44687f
Fix another iterator invalidation that caused a *really* nasty miscompilation in 403.gcc.
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llvm-svn: 111210
2010-08-16 23:42:33 +00:00
7b974a45db
Fix a subtle use-after-free issue.
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llvm-svn: 110863
2010-08-11 22:36:04 +00:00
0bd61240e9
Improve indentation.
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llvm-svn: 110778
2010-08-11 04:24:25 +00:00
5f1dd0967d
Now that we're using ConstantRange to represent potential values, make use of that represenation to
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create constraints from comparisons other than eq/neq.
llvm-svn: 110742
2010-08-10 23:20:01 +00:00
185fe00633
Switch over to using ConstantRange to track integral values.
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llvm-svn: 110714
2010-08-10 20:03:09 +00:00
8afac043fb
Add ConstantRange information to the debugging output.
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llvm-svn: 110598
2010-08-09 20:50:46 +00:00
0f306a45ad
Add the beginnings of infrastructure for range tracking.
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llvm-svn: 110388
2010-08-05 22:59:19 +00:00
c3a1413ea1
Split the tag and value members of LVILatticeVal in preparation for expanding the lattice to something that won't fit in two bits.
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llvm-svn: 110383
2010-08-05 22:10:46 +00:00
c1561b8400
Add an initial implementation of PHI translation for LazyValueInfo. This involves rolling back some
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of my earlier data structure improvements until I can ensure that there are no iterator invalidation problems.
llvm-svn: 109935
2010-07-30 23:59:40 +00:00
e4a0ab69d2
Revert my last two patches to LVI, which recent changes have exposed a miscompilation in.
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llvm-svn: 109889
2010-07-30 20:56:07 +00:00
a44f49f189
Pass the queried value by argument rather than in a member, in preparation for supporting PHI translation.
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llvm-svn: 109701
2010-07-28 23:50:08 +00:00
6982dd4e1f
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.
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llvm-svn: 109679
2010-07-28 22:07:25 +00:00
aac5a72139
Rearrange several datastructures in LazyValueInfo to improve compile time.
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This is still not perfect, but better than it was before.
llvm-svn: 109563
2010-07-27 23:58:11 +00:00
aa7f66ba67
Add an initial implementation of LazyValueInfo updating for JumpThreading. Disabled for now.
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llvm-svn: 109424
2010-07-26 18:48:03 +00:00
a57b97e7e7
Fix batch of converting RegisterPass<> to INTIALIZE_PASS().
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llvm-svn: 109045
2010-07-21 22:09:45 +00:00
37e9809294
Convert debug messages to use dbgs(). Generally this means
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s/errs/dbgs/g except for certain special cases.
llvm-svn: 92040
2009-12-23 20:43:58 +00:00
e58c05780e
typo spotted by duncan.
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llvm-svn: 88884
2009-11-16 03:51:42 +00:00
7735878591
teach LVI to infer edge information from switch instructions.
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This allows JT to eliminate a ton of infeasible edges when
handling code like the templates in PatternMatch.h
llvm-svn: 88869
2009-11-15 20:02:12 +00:00
b0c0a0df3e
fix a logic error that would cause LVI-JT to miscompile
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some conditionals
llvm-svn: 88868
2009-11-15 20:01:24 +00:00
2c708562f5
implement the first stab at caching queries. This isn't correct
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(because the invalidation logic is missing) but LVI isn't enabled
by default anyway.
llvm-svn: 88867
2009-11-15 20:00:52 +00:00
af025d3f6e
refactor a bunch of code forming the new LazyValueInfoCache
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and LVIQuery classes, no functionality change.
llvm-svn: 88866
2009-11-15 19:59:49 +00:00
22db4b5e0c
various fixes to the lattice transfer functions.
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llvm-svn: 86952
2009-11-12 04:57:13 +00:00
565ee2f1bd
Add a new getPredicateOnEdge method which returns more rich information for
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constant constraints. Improve the LVI lattice to include inequality
constraints.
llvm-svn: 86950
2009-11-12 04:36:58 +00:00
d5e25436a1
expose edge information and switch j-t to use it.
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llvm-svn: 86920
2009-11-12 01:29:10 +00:00
b584d1e456
move some stuff into DEBUG's and turn on lazy-value-info for
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the basic.ll testcase.
llvm-svn: 86918
2009-11-12 01:22:16 +00:00
19019eaf00
make LazyValueInfo actually to some stuff. This isn't very tested but improves
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strswitch.
llvm-svn: 86889
2009-11-11 22:48:44 +00:00
fde1f8d0d8
stub out some LazyValueInfo interfaces, and have JumpThreading
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start using them in a trivial way when -enable-jump-threading-lvi
is passed. enable-jump-threading-lvi will be my playground for
awhile.
llvm-svn: 86789
2009-11-11 02:08:33 +00:00
741c94c719
Stub out a new lazy value info pass, which will eventually
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vend value constraint information to the optimizer.
llvm-svn: 86767
2009-11-11 00:22:30 +00:00
Owen Anderson