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817 Commits

Author SHA1 Message Date
Devang Patel
38f181fa8c Do not use virtual function to identify an analysis pass. 
llvm-svn: 48520
 2008-03-19 00:48:41 +00:00
Dale Johannesen
4d0221c45b Get rid of compilation warnings. Per Devang. 
llvm-svn: 48478
 2008-03-18 01:52:17 +00:00
Devang Patel
811ca3ddba Identify Analysis pass. 
Do not run analysis pass again if analysis info is still available.
This fixes PR1441.

llvm-svn: 48476
 2008-03-18 00:39:19 +00:00
Dan Gohman
9ca724cee0 Move the PMStack class out of Pass.h and into PassManagers.h. 
llvm-svn: 48367
 2008-03-14 18:14:29 +00:00
Nick Lewycky
50c8d20ca2 Update the block cloner which fixes bugpoint on code using unwind_to (phew!) 
and also update the cloning interface's major user, the loop optimizations.

llvm-svn: 48088
 2008-03-09 05:24:34 +00:00
Dan Gohman
0cfccf801d Add -analyze support to postdomtree. 
llvm-svn: 47680
 2008-02-27 18:38:29 +00:00
Anton Korobeynikov
0c5e186924 Unbreak build with gcc 4.3: provide missed includes and silence most annoying warnings. 
llvm-svn: 47367
 2008-02-20 11:08:44 +00:00
Nick Lewycky
0b6cdd1eff Add 'umax' similar to 'smax' SCEV. Closes PR2003. 
Parse reversed smax and umax as smin and umin and express them with negative
or binary-not SCEVs (which are really just subtract under the hood).

Parse 'xor %x, -1' as (-1 - %x).

Remove dead code (ConstantInt::get always returns a ConstantInt).

Don't use getIntegerSCEV(-1, Ty). The first value is an int, then it gets
passed into a uint64_t. Instead, create the -1 directly from
ConstantInt::getAllOnesValue().

llvm-svn: 47360
 2008-02-20 06:48:22 +00:00
Owen Anderson
274aa2846e Re-apply the patch to improve the optimizations of memcpy's, with several 
bugs fixed.  This now passes PPC bootstrap.

llvm-svn: 47026
 2008-02-12 21:15:18 +00:00
Wojciech Matyjewicz
76c2b22ee4 Fix PR1798 - an error in the evaluation of SCEVAddRecExpr at an 
arbitrary iteration.

The patch:
1) changes SCEVSDivExpr into SCEVUDivExpr,
2) replaces PartialFact() function with BinomialCoefficient(); the 
computations (essentially, the division) in BinomialCoefficient() are 
performed with the apprioprate bitwidth necessary to avoid overflow; 
unsigned division is used instead of the signed one.

Computations in BinomialCoefficient() require support from the code 
generator for APInts. Currently, we use a hack rounding up the 
neccessary bitwidth to the nearest power of 2. The hack is easy to turn 
off in future.

One remaining issue: we assume the divisor of the binomial coefficient 
formula can be computed accurately using 16 bits. It means we can handle 
AddRecs of length up to 9. In future, we should use APInts to evaluate 
the divisor.

Thanks to Nicholas for cooperation!

llvm-svn: 46955
 2008-02-11 11:03:14 +00:00
Wojciech Matyjewicz
2e45476439 Add a check if the initial value of the induction variable is 0 (the method comment says it should be). 
llvm-svn: 46907
 2008-02-09 18:06:58 +00:00
Dan Gohman
562ed58408 Avoid unnecessarily casting away const, fixing a FIXME. 
llvm-svn: 46591
 2008-01-31 01:05:10 +00:00
Dan Gohman
6f9748b626 Add comments describing what the loop depth values mean. Also, make a 
minor simplification to the loop depth calculation code.

llvm-svn: 46511
 2008-01-29 12:12:40 +00:00
Chris Lattner
201be5f41e Move typedef of loop to top of the file where it is more obvious. 
llvm-svn: 45857
 2008-01-11 06:29:42 +00:00
Chris Lattner
b9232a8374 Fix 80 col violations 
llvm-svn: 45856
 2008-01-11 06:27:42 +00:00
Wojciech Matyjewicz
2502769cf3 fix typo 
llvm-svn: 45595
 2008-01-04 20:04:08 +00:00
Chris Lattner
e0b1ee937a Don't attribute in file headers anymore. See llvmdev for the 
discussion of this change.  Boy are my fingers tired. ;-)

llvm-svn: 45411
 2007-12-29 19:59:42 +00:00
Chris Lattner
5ca42cd342 Fix PR1850 by removing an unsafe transformation from VMCore/ConstantFold.cpp. 
Reimplement the xform in Analysis/ConstantFolding.cpp where we can use
targetdata to validate that it is safe.  While I'm in there, fix some const
correctness issues and generalize the interface to the "operand folder".

llvm-svn: 44817
 2007-12-10 22:53:04 +00:00
Owen Anderson
e3de18ac1d Fix several cache coherence bugs in MemDep/GVN that were found. Also add some (disabled) debugging code 
to make such problems easier to diagnose in the future, written by Duncan Sands.

llvm-svn: 44695
 2007-12-08 01:37:09 +00:00
Duncan Sands
14f11d6836 Integrate the readonly/readnone logic more deeply 
into alias analysis.  This meant updating the API
which now has versions of the getModRefBehavior,
doesNotAccessMemory and onlyReadsMemory methods
which take a callsite parameter.  These should be
used unless the callsite is not known, since in
general they can do a better job than the versions
that take a function.  Also, users should no longer
call the version of getModRefBehavior that takes
both a function and a callsite.  To reduce the
chance of misuse it is now protected.

llvm-svn: 44487
 2007-12-01 07:51:45 +00:00
Owen Anderson
37a1ebc6a3 Fixes for MachineLoopInfo, mostly from Evan. With these, it should be almost useable! 
llvm-svn: 44480
 2007-12-01 03:01:39 +00:00
Owen Anderson
2b9b50b985 Add MachineLoopInfo. This is not yet tested. 
llvm-svn: 44384
 2007-11-27 22:47:08 +00:00
Owen Anderson
43d4a82d4b Make LoopInfoBase more generic, in preparation for having MachineLoopInfo. This involves a small interface change. 
llvm-svn: 44348
 2007-11-27 03:43:35 +00:00
Owen Anderson
67929e6873 Add accessor for getting the underlying templated type. This is necessary for templated LoopInfo. 
llvm-svn: 44347
 2007-11-27 03:33:40 +00:00
Anton Korobeynikov
14246a2eba Remove another leak. Due to some reason AliasSetTracker didn't had any dtor... 
llvm-svn: 44320
 2007-11-25 23:52:02 +00:00
Nick Lewycky
1536b3f230 Add new SCEV, SCEVSMax. This allows LLVM to analyze do-while loops. 
llvm-svn: 44319
 2007-11-25 22:41:31 +00:00
Anton Korobeynikov
b7ee8cdcba Remove a leak. Destroy LoopInfoBase object. releaseMemory() is actually called in its dtor. 
llvm-svn: 44317
 2007-11-25 18:41:39 +00:00
Dan Gohman
27ac53cc23 Remove meaningless qualifiers from return types, avoiding compiler warnings. 
llvm-svn: 44240
 2007-11-19 20:46:23 +00:00
Dan Gohman
760d574313 Add explicit keywords. 
llvm-svn: 44234
 2007-11-19 15:30:20 +00:00
Anton Korobeynikov
c9ab2516fa Reverted r44163 per request 
llvm-svn: 44177
 2007-11-15 18:33:16 +00:00
Nick Lewycky
6690b9499b Fix handling of overflow in loop calculation by adding new UDiv SCEV. This SCEV 
is disabled in the sense that it will refuse to create one from a UDiv
instruction, until the code is better tested.

llvm-svn: 44163
 2007-11-15 06:30:50 +00:00
Owen Anderson
b88ac41e0e More templatization. 
llvm-svn: 44158
 2007-11-15 05:00:15 +00:00
Owen Anderson
7b92dab615 Start the process of making MachineLoopInfo possible by templating Loop. 
llvm-svn: 44097
 2007-11-14 02:33:58 +00:00
Owen Anderson
e6b623ba1c VAArgInst does, in fact, read memory. 
llvm-svn: 43633
 2007-11-02 04:01:21 +00:00
Owen Anderson
4314cf9d58 Some fixes to get MachineDomTree working better. 
llvm-svn: 43541
 2007-10-31 03:30:14 +00:00
Dan Gohman
65be3b6502 Add explicit keywords. 
llvm-svn: 43464
 2007-10-29 19:52:04 +00:00
Owen Anderson
229333c94b Add a first attempt at dominator information for MBB's. Use with caution: this has been tested to compile. It has not yet been confirmed to generate correct analysis. 
llvm-svn: 43438
 2007-10-29 04:50:50 +00:00
Owen Anderson
dc3329dbf7 Make it possible for DomTreeBase to be constructed from MachineFunction's as well as just Function's. 
llvm-svn: 43321
 2007-10-25 00:16:57 +00:00
Owen Anderson
52b33065a4 Make DomTreeBase not a FunctionPass. 
llvm-svn: 43263
 2007-10-23 21:42:49 +00:00
Owen Anderson
962303b4ef Unbreak the build. Forgot to commit this file. 
llvm-svn: 43260
 2007-10-23 21:04:37 +00:00
Owen Anderson
33b9693ab8 Make DomTree and PostDomTree thin wrappers around DomTreeBase, rather than inheriting from it. 
llvm-svn: 43259
 2007-10-23 20:58:37 +00:00
Dan Gohman
68fc6d7395 Move the SCEV object factors from being static members of the individual 
SCEV subclasses to being non-static member functions of the ScalarEvolution
class.

llvm-svn: 43224
 2007-10-22 18:31:58 +00:00
Owen Anderson
4b407757d0 Move Split<...>() into DomTreeBase. This should make the #include's of DominatorInternals.h 
in CodeExtractor and LoopSimplify unnecessary.

Hartmut, could you confirm that this fixes the issues you were seeing?

llvm-svn: 43115
 2007-10-18 05:13:52 +00:00
Hartmut Kaiser
ed12f66488 Updated VC++ build system. 
Silenced some VC warnings.

I'm getting linker errors, though: unresolved externals:

llvm::Split<class llvm::BasicBlock *,struct llvm::GraphTraits<class llvm::BasicBlock *> >(class llvm::DominatorTreeBase<class llvm::BasicBlock> &,class llvm::BasicBlock *)

and

llvm::Split<struct llvm::Inverse<class llvm::BasicBlock *>,struct llvm::GraphTraits<struct llvm::Inverse<class llvm::BasicBlock *> > >(class llvm::DominatorTreeBase<class llvm::BasicBlock> &,class llvm::BasicBlock *)

Where are these defined?

llvm-svn: 43073
 2007-10-17 14:56:40 +00:00
Owen Anderson
1235d1218b Move splitBlock into DomTreeBase from DomTree. 
llvm-svn: 43059
 2007-10-17 02:03:17 +00:00
Owen Anderson
315471786b Fix some formatting. 
llvm-svn: 43049
 2007-10-16 22:59:15 +00:00
Owen Anderson
43fefb53a6 Template DominatorTreeBase by node type. This is the next major step towards 
having dominator information on MBB's.

llvm-svn: 43036
 2007-10-16 19:59:25 +00:00
Owen Anderson
ffcd82d1ed Begin the process of allowing DomTree on MBB's. Step One: template DomTreeNode by making it a typedef of a templated DomTreeNodeBase. 
llvm-svn: 42743
 2007-10-08 07:44:39 +00:00
Owen Anderson
cb51170957 Completely merge the implementation details of DomTree and PostDomTree. 
Also, add a FIXME for a bug in PostDomTree calculation I noticed while writing this,

llvm-svn: 42593
 2007-10-03 21:25:45 +00:00
Owen Anderson
91e23d710c Factor some code from the DomTree and PostDomTree calculate methods up into 
each one's runOnFunction method.

llvm-svn: 42563
 2007-10-03 03:20:17 +00:00