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3190 Commits

Author SHA1 Message Date
Dan Gohman
f9365363db Remove context sensitivity concerns from interprocedural-basic-aa, and 
make it more aggressive in cases where both pointers are known to live
in the same function.

llvm-svn: 107420
 2010-07-01 20:08:40 +00:00
Dan Gohman
547c92af20 In ScalarEvolution::forgetValue, eliminate any SCEVUnknown 
entries associated with the value being erased in the
folding set map.  These entries used to be harmless, because
a SCEVUnknown doesn't store any information about its Value*,
so having a new Value allocated at the old Value's address
wasn't a problem. But now that ScalarEvolution is storing more
information about values, this is no longer safe.

llvm-svn: 107316
 2010-06-30 20:21:12 +00:00
Dan Gohman
683a9e2498 Revert the part of r107257 which introduced new logic for using 
nsw and nuw flags from IR Instructions. On further consideration,
this isn't valid.

llvm-svn: 107298
 2010-06-30 17:27:11 +00:00
Dan Gohman
b7fc09a156 Improve ScalarEvolution's nsw and nuw preservation. 
llvm-svn: 107257
 2010-06-30 07:16:37 +00:00
Dan Gohman
7446416058 When computing a new ConservativeResult, intersect it with 
the old one instead of replacing it, to be more precise.

llvm-svn: 107256
 2010-06-30 06:58:35 +00:00
Dan Gohman
2112bbf184 Rework scev-aa's basic computation so that it doesn't depend 
on ScalarEvolution successfully folding and preserving
range information for both A-B and B-A. Now, if it gets
either one, it's sufficient.

llvm-svn: 107249
 2010-06-30 06:12:16 +00:00
Dan Gohman
01304ebfad Simplify. 
llvm-svn: 107248
 2010-06-30 06:09:46 +00:00
Dan Gohman
32534063c7 Fix ScalarEvolution's tripcount computation for chains of loops 
where each loop's induction variable's start value is the exit
value of a preceding loop.

llvm-svn: 107224
 2010-06-29 23:43:06 +00:00
Dan Gohman
1c9ce3e66d Fix whitespace style. 
llvm-svn: 107175
 2010-06-29 18:12:34 +00:00
Duncan Sands
b367b1e428 Remove a pointless variable. 
llvm-svn: 107128
 2010-06-29 11:39:45 +00:00
Benjamin Kramer
acb45b427b Use a more obvious way to avoid compiling functions which are only used when XDEBUG is enabled. 
llvm-svn: 107125
 2010-06-29 10:03:11 +00:00
Chandler Carruth
e9bf8c4ee8 Jump through some silly hoops to make GCC accept that a function may not always 
be called.

llvm-svn: 107124
 2010-06-29 06:46:00 +00:00
Dan Gohman
f5dfb360be Just as its not safe to blindly transfer the nsw bit from an add 
instruction to an add scev, it's not safe to blindly transfer the
inbounds flag from a gep instruction to an nsw on the scev for the
gep.

llvm-svn: 107117
 2010-06-29 01:41:41 +00:00
Dan Gohman
37bf33ccff Add an Intraprocedural form of BasicAliasAnalysis, which aims to 
properly handles instructions and arguments defined in different
functions, or across recursive function iterations.

llvm-svn: 107109
 2010-06-29 00:50:39 +00:00
Dan Gohman
bd121d9b9f Fix Value::stripPointerCasts and BasicAA to avoid trouble on 
code in unreachable blocks, which have have use-def cycles.
This fixes PR7514.

llvm-svn: 107071
 2010-06-28 21:16:52 +00:00
Dan Gohman
d454f5c234 Generalize AAEval so that it can be used both per-function and 
interprocedurally. Note that as of this writing, existing alias
analysis passes are not prepared to be used interprocedurally.

llvm-svn: 107013
 2010-06-28 16:01:37 +00:00
Devang Patel
fdca552823 Use named MDNode, llvm.dbg.sp, to collect subprogram info. This will be used to emit local variable's debug info of deleted functions. 
llvm-svn: 106989
 2010-06-28 05:53:08 +00:00
Devang Patel
858a0f3664 Do not forget last element, function, while creating Subprogram definition MDNode from subprogram declare MDNode. 
llvm-svn: 106985
 2010-06-27 21:04:31 +00:00
Dan Gohman
01de3704f9 Eliminate a redundant FoldingSet lookup. 
llvm-svn: 106872
 2010-06-25 18:47:08 +00:00
Dan Gohman
bfbfa95b51 Don't try to preserve pointer types in SCEVConstants; the old code 
was over-complicated.

llvm-svn: 106760
 2010-06-24 16:47:03 +00:00
Dan Gohman
35a5a7285a Make the trunc code consistent with the zext and sext code in its 
handling of pointer types.

llvm-svn: 106757
 2010-06-24 16:33:38 +00:00
Gabor Greif
b86c04f740 use ArgOperand accessors 
llvm-svn: 106697
 2010-06-23 23:38:07 +00:00
Gabor Greif
bfb7386690 use the new isFreeCall API and ArgOperand accessors 
llvm-svn: 106692
 2010-06-23 22:48:06 +00:00
Gabor Greif
4615fc1c93 minor enhancement to llvm::isFreeCall API: return CallInst; no functional change 
llvm-svn: 106686
 2010-06-23 21:51:12 +00:00
Gabor Greif
0b348ae475 use ArgOperand getters 
llvm-svn: 106685
 2010-06-23 21:41:47 +00:00
Dan Gohman
f44783ab4e Replace ScalarEvolution's private copy of getLoopPredecessor 
with LoopInfo's public copy.

llvm-svn: 106603
 2010-06-22 23:43:28 +00:00
Dan Gohman
74d5144414 Use pre-increment instead of post-increment when the result is not used. 
llvm-svn: 106542
 2010-06-22 15:08:57 +00:00
Dan Gohman
a3bc6b13f7 Allow "exhaustive" trip count evaluation on phi nodes with all 
constant operands.

llvm-svn: 106537
 2010-06-22 13:15:46 +00:00
Devang Patel
f50b6147ad Use single interface, using twine, to get named metadata. 
getNamedMetadata().

llvm-svn: 106518
 2010-06-22 01:19:38 +00:00
Devang Patel
dee41b010a Do not rely on Twine temporaries to survive. 
llvm-svn: 106515
 2010-06-22 01:01:58 +00:00
Dan Gohman
6a3c46ad49 Use A.append(...) instead of A.insert(A.end(), ...) when A is a 
SmallVector, and other SmallVector simplifications.

llvm-svn: 106452
 2010-06-21 19:47:52 +00:00
Devang Patel
3dbb143c29 Do not directly use function names to construct new name for named metadata. 
"llvm.dbg.lv.~A" is not a valid name.

llvm-svn: 106438
 2010-06-21 18:36:58 +00:00
Dan Gohman
90c5f8753d Restore a call to rememberInstruction which was accidentally dropped 
in refactoring.

llvm-svn: 106398
 2010-06-19 22:50:35 +00:00
Dan Gohman
cec5b682b6 Fix ScalarEvolution's "exhaustive" trip count evaluation code to avoid 
assuming that loops are in canonical form, as ScalarEvolution doesn't
depend on LoopSimplify itself. Also, with indirectbr not all loops can
be simplified. This fixes PR7416.

llvm-svn: 106389
 2010-06-19 14:17:24 +00:00
Dan Gohman
fb091c213b Factor out duplicated code for reusing and inserting casts into 
a helper function.

llvm-svn: 106388
 2010-06-19 13:25:23 +00:00
Dan Gohman
b5ec637e57 Revert r106304 (105548 and friends), which are the SCEVComplexityCompare 
optimizations. There is still some nondeterminism remaining.

llvm-svn: 106306
 2010-06-18 19:54:20 +00:00
Dan Gohman
527b570925 Reapply 105540, 105542, and 105548, and revert r105732. 
llvm-svn: 106304
 2010-06-18 19:26:04 +00:00
Dan Gohman
75f6f94c48 Reapply 105546. 
llvm-svn: 106302
 2010-06-18 19:12:32 +00:00
Dan Gohman
ab895769a7 Reapply 105544. 
llvm-svn: 106301
 2010-06-18 19:09:27 +00:00
Dan Gohman
e20e668c7e Remove getIntegerSCEV; it's redundant with getConstant, and getConstant 
is more consistent with the ConstantInt API.

llvm-svn: 106281
 2010-06-18 14:33:50 +00:00
Dan Gohman
0b5b93b20d Eliminate unnecessary uses of getZExtValue(). 
llvm-svn: 106279
 2010-06-18 14:22:04 +00:00
Dan Gohman
eab6b51039 Fix a typo in a comment. 
llvm-svn: 106260
 2010-06-18 00:53:08 +00:00
Dan Gohman
1d9d93381a Simplify this code. 
llvm-svn: 106254
 2010-06-17 23:34:09 +00:00
Jim Grosbach
67b46d6303 A few more places where SCEVExpander bits need to skip over debug intrinsics 
when iterating through instructions. Yet more work for rdar://7797940

llvm-svn: 106149
 2010-06-16 21:13:38 +00:00
Devang Patel
108d77796f Check function pointer first, before comparing function names. 
llvm-svn: 106088
 2010-06-16 06:42:02 +00:00
Devang Patel
3282324020 Use separate named MDNode to hold each function's local variable info. 
This speeds up local variable handling in DwarfDebug.

llvm-svn: 106075
 2010-06-16 00:53:55 +00:00
Stuart Hastings
f9ef9ff3d6 Support for nested functions/classes in debug output. (Again.) Radar 7424645. 
llvm-svn: 105828
 2010-06-11 20:08:44 +00:00
Stuart Hastings
7b15c202c7 Delete duplicate function. 
llvm-svn: 105827
 2010-06-11 20:05:01 +00:00
Evan Cheng
28c151ae52 Revert 105540, 105542, 105544, 105546, and 105548 to unbreak bootstrapping. 
llvm-svn: 105740
 2010-06-09 18:59:43 +00:00
Kenneth Uildriks
2c6b68924d Pulled CodeMetrics out of InlineCost.h and made it a bit more general, so it can be reused from PartialSpecializationCost 
llvm-svn: 105725
 2010-06-09 15:11:37 +00:00