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3625 Commits

Author SHA1 Message Date
Dan Gohman
2a190081f6 Introduce a symbolic constant for ~0u for use with AliasAnalysis. 
llvm-svn: 110091
 2010-08-03 01:03:11 +00:00
Dan Gohman
da7182e116 Add a convenient form of AliasAnalysis::alias for the case where the sizes 
are unknown.

llvm-svn: 110090
 2010-08-03 00:56:30 +00:00
Dan Gohman
7cac95778f Make SCEVUnknown a CallbackVH, so that it can be notified directly 
of Value deletions and RAUWs, instead of relying on ScalarEvolution's
Scalars map being notified, as that's complicated at best, and
insufficient in general.

This means SCEVUnknown needs a non-trivial destructor, so introduce
a mechanism to allow ScalarEvolution to locate all the SCEVUnknowns.

llvm-svn: 110086
 2010-08-02 23:49:30 +00:00
Dan Gohman
272980b3f6 Sketch up a preliminary Type-Based Alias Analysis implementation. 
llvm-svn: 110077
 2010-08-02 23:11:01 +00:00
Dan Gohman
d8968da2c5 Add a lint check for indirectbr with no successors. 
llvm-svn: 110074
 2010-08-02 23:06:43 +00:00
Devang Patel
33a2cdf3f9 Add explicit constructors. Patch by Renato Golin. 
llvm-svn: 110072
 2010-08-02 22:51:46 +00:00
Dan Gohman
abfafadfc7 Fix namespace polution. 
llvm-svn: 110056
 2010-08-02 18:50:06 +00:00
Oscar Fuentes
40b31ad3ee Prefix next' iterator operation with llvm::'. 
Fixes potential ambiguity problems on VS 2010.

Patch by nobled!

llvm-svn: 110029
 2010-08-02 06:00:15 +00:00
Owen Anderson
c1561b8400 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.

llvm-svn: 109935
 2010-07-30 23:59:40 +00:00
Owen Anderson
e4a0ab69d2 Revert my last two patches to LVI, which recent changes have exposed a miscompilation in. 
llvm-svn: 109889
 2010-07-30 20:56:07 +00:00
Eric Christopher
ef6d5933a6 Speculatively revert r109705 since it seems to be causing some build bot 
angst.

llvm-svn: 109718
 2010-07-29 01:25:38 +00:00
Dan Gohman
3d6ac44d96 Factor out some of the code for updating old SCEVUnknown values, and 
extend it to handle the case where multiple RAUWs affect a single
SCEVUnknown.

Add a ScalarEvolution unittest to test for this situation.

llvm-svn: 109705
 2010-07-29 00:17:55 +00:00
Owen Anderson
a44f49f189 Pass the queried value by argument rather than in a member, in preparation for supporting PHI translation. 
llvm-svn: 109701
 2010-07-28 23:50:08 +00:00
Owen Anderson
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. 
llvm-svn: 109679
 2010-07-28 22:07:25 +00:00
Daniel Dunbar
18e39cec7a RegionInfo: Make sure to free cached nodes; Tobias, please check! 
llvm-svn: 109650
 2010-07-28 20:28:50 +00:00
Gabor Greif
e497e5ef46 simplify 
llvm-svn: 109585
 2010-07-28 15:31:37 +00:00
Gabor Greif
5bf74d648d use Value* constructor of CallSite to create potentially improper site, and test that 
llvm-svn: 109580
 2010-07-28 12:35:54 +00:00
Gabor Greif
67a970bff2 use Value* constructor of CallSite to create potentially improper site 
llvm-svn: 109579
 2010-07-28 12:19:46 +00:00
Gabor Greif
7cf6056484 simplify 
llvm-svn: 109578
 2010-07-28 10:57:28 +00:00
Gabor Greif
2e2503cd8d simplify 
llvm-svn: 109577
 2010-07-28 10:46:09 +00:00
Dan Gohman
7a066723d0 Make SCEVCallbackVH::allUsesReplacedWith update the old SCEVUnknown 
object, as it may still be referenced by SCEVs not cleaned up by the
use list traversal.

Also, in ScalarEvolution::forgetValue, only check for a SCEVUnknown
object for the original value, not for any value in the use list,
because other SCEVUnknown values aren't necessary obsolete at that
point.

llvm-svn: 109570
 2010-07-28 01:09:07 +00:00
Dan Gohman
8aeb0fb5ca Make SCEVCallbackVH::allUsesReplacedWith unconditionally delete 
the old value.

llvm-svn: 109567
 2010-07-28 00:28:25 +00:00
Owen Anderson
aac5a72139 Rearrange several datastructures in LazyValueInfo to improve compile time. 
This is still not perfect, but better than it was before.

llvm-svn: 109563
 2010-07-27 23:58:11 +00:00
Gabor Greif
0630a71742 reintroduce original (asserting) semantics of CallSite(Instruction *II) 
add instead a CallSite(Value* V) constructor that is consistent with ImmutableCallSize
and use that one in client code

llvm-svn: 109553
 2010-07-27 22:53:28 +00:00
Gabor Greif
ef1ca24b91 recommit simplification (originally r109504, backed out in r109508) now that problem in CallSiteBase is fixed 
llvm-svn: 109547
 2010-07-27 22:02:00 +00:00
Gabor Greif
ed1d92cb9a back out r109504, breaks the bots 
llvm-svn: 109508
 2010-07-27 15:18:11 +00:00
Gabor Greif
195a609c37 simplify 
llvm-svn: 109504
 2010-07-27 14:38:38 +00:00
Gabor Greif
d59498bc97 use ImmutableCallSite for const-corrgoodness 
llvm-svn: 109503
 2010-07-27 14:15:29 +00:00
Tobias Grosser
fc763867d5 RegionInfo: Add getMaxRegionExit() 
getMaxRegionExit returns the exit of the maximal refined region starting
at a specific basic block.

llvm-svn: 109496
 2010-07-27 08:39:43 +00:00
Tobias Grosser
1bec81a888 Add function to query RegionInfo about loops. 
* contains(Loop), * getOutermostLoop()
* Improve getNameStr() to return a sensible name, if basic blocks are not named.

llvm-svn: 109490
 2010-07-27 04:17:13 +00:00
Owen Anderson
aa7f66ba67 Add an initial implementation of LazyValueInfo updating for JumpThreading. Disabled for now. 
llvm-svn: 109424
 2010-07-26 18:48:03 +00:00
Dan Gohman
cd83870faf Fix SCEVExpander::visitAddRecExpr so that it remembers the induction variable 
it inserted rather than using LoopInfo::getCanonicalInductionVariable to
rediscover it, since that doesn't work on non-canonical loops. This fixes
infinite recurrsion on such loops; PR7562.

llvm-svn: 109419
 2010-07-26 18:28:14 +00:00
Dan Gohman
b3aa6c7110 Use DominatorTree::properlyDominates instead of dominates with an 
explicit inequality check.

llvm-svn: 109398
 2010-07-26 17:34:05 +00:00
Dan Gohman
7038bd5c1a Eliminate getCanonicalInductionVariableIncrement's last user and 
eliminate it.

llvm-svn: 109270
 2010-07-23 21:34:51 +00:00
Dan Gohman
acafc61023 Simplify this code; it can use the regular CFG utlities rather than 
the BlockTraits abstractions.

llvm-svn: 109268
 2010-07-23 21:25:16 +00:00
Dan Gohman
5ae3102459 Micro-optimize SCEVComplexityCompare. 
llvm-svn: 109267
 2010-07-23 21:20:52 +00:00
Dan Gohman
992db006d0 Add a const qualifier. 
llvm-svn: 109266
 2010-07-23 21:18:55 +00:00
Gabor Greif
1a2da423c9 use cascading operator-> feature 
llvm-svn: 109104
 2010-07-22 13:49:27 +00:00
Gabor Greif
dde79d8f1a mass elimination of reliance on automatic iterator dereferencing 
llvm-svn: 109103
 2010-07-22 13:36:47 +00:00
Gabor Greif
d9f48ecb2e use -> instead of (*). 
llvm-svn: 109094
 2010-07-22 11:12:32 +00:00
Gabor Greif
07c8ad54da cache dereferenced iterator 
llvm-svn: 109093
 2010-07-22 11:07:46 +00:00
Tobias Grosser
336734aca6 Add new RegionInfo pass. 
The RegionInfo pass detects single entry single exit regions in a function,
where a region is defined as any subgraph that is connected to the remaining
graph at only two spots.
Furthermore an hierarchical region tree is built.
Use it by calling "opt -regions analyze" or "opt -view-regions".

llvm-svn: 109089
 2010-07-22 07:46:31 +00:00
Dan Gohman
2637cc1a38 Make NamedMDNode not be a subclass of Value, and simplify the interface 
for creating and populating NamedMDNodes.

llvm-svn: 109061
 2010-07-21 23:38:33 +00:00
Owen Anderson
ac4a1ede17 Add INSTANTIATE_AG_PASS, which combines RegisterPass<> with RegisterAnalysisGroup<> for pass registration. 
llvm-svn: 109058
 2010-07-21 23:07:00 +00:00
Owen Anderson
a57b97e7e7 Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
llvm-svn: 109045
 2010-07-21 22:09:45 +00:00
Jim Grosbach
6cd0deb997 tidy up. 
llvm-svn: 109038
 2010-07-21 21:36:25 +00:00
Dan Gohman
093cb79d4b Disallow null as a named metadata operand. 
Make MDNode::destroy private.
Fix the one thing that used MDNode::destroy, outside of MDNode itself.

One should never delete or destroy an MDNode explicitly. MDNodes
implicitly go away when there are no references to them (implementation
details aside).

llvm-svn: 109028
 2010-07-21 18:54:18 +00:00
Dan Gohman
625fd2292d Fix SCEV denormalization of expressions where the exit value from 
one loop is involved in the increment of an addrec for another
loop. This fixes rdar://8168938.

llvm-svn: 108863
 2010-07-20 17:06:20 +00:00
Dan Gohman
46f00a25f9 Add a fast path for x - x. 
llvm-svn: 108855
 2010-07-20 16:53:00 +00:00
Dan Gohman
31158756e4 Simplify this code; LoopInfo::getCanonicalInductionVariable will only 
find integer induction variables.

llvm-svn: 108853
 2010-07-20 16:46:58 +00:00