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801 Commits

Author SHA1 Message Date
Dan Gohman
70eff63008 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107298 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 17:27:11 +00:00
Dan Gohman
b9f9651445 Improve ScalarEvolution's nsw and nuw preservation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107257 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 07:16:37 +00:00
Dan Gohman
8a18d6b48f When computing a new ConservativeResult, intersect it with 
the old one instead of replacing it, to be more precise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107256 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 06:58:35 +00:00
Dan Gohman
1104645eef 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107224 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-29 23:43:06 +00:00
Dan Gohman
7a64257f94 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107117 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-29 01:41:41 +00:00
Dan Gohman
420ab9102c Eliminate a redundant FoldingSet lookup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106872 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-25 18:47:08 +00:00
Dan Gohman
eaf6cf28dd Don't try to preserve pointer types in SCEVConstants; the old code 
was over-complicated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106760 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 16:47:03 +00:00
Dan Gohman
1faa88280e Make the trunc code consistent with the zext and sext code in its 
handling of pointer types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106757 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 16:33:38 +00:00
Dan Gohman
605c14fb11 Replace ScalarEvolution's private copy of getLoopPredecessor 
with LoopInfo's public copy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106603 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-22 23:43:28 +00:00
Dan Gohman
9d4588ffad Allow "exhaustive" trip count evaluation on phi nodes with all 
constant operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106537 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-22 13:15:46 +00:00
Dan Gohman
403a8cdda5 Use A.append(...) instead of A.insert(A.end(), ...) when A is a 
SmallVector, and other SmallVector simplifications.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106452 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-21 19:47:52 +00:00
Dan Gohman
b92654d9c9 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106389 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-19 14:17:24 +00:00
Dan Gohman
3bf63768e5 Revert r106304 (105548 and friends), which are the SCEVComplexityCompare 
optimizations. There is still some nondeterminism remaining.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106306 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-18 19:54:20 +00:00
Dan Gohman
78db186d2d Reapply 105540, 105542, and 105548, and revert r105732. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106304 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-18 19:26:04 +00:00
Dan Gohman
e0f0c7b024 Reapply 105546. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106302 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-18 19:12:32 +00:00
Dan Gohman
c72f0c8c57 Reapply 105544. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106301 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-18 19:09:27 +00:00
Dan Gohman
07587a4500 Remove getIntegerSCEV; it's redundant with getConstant, and getConstant 
is more consistent with the ConstantInt API.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106281 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-18 14:33:50 +00:00
Dan Gohman
27ed6a41ce Simplify this code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106254 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-17 23:34:09 +00:00
Evan Cheng
1d451dff63 Revert 105540, 105542, 105544, 105546, and 105548 to unbreak bootstrapping. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105740 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-09 18:59:43 +00:00
Dan Gohman
fd447eff22 The FoldingSet hash data includes pointer values, so it isn't 
determinstic. Instead, give SCEV objects an arbitrary sequence
number.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105548 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-07 19:36:14 +00:00
Dan Gohman
5e5dd68c7f Optimize this code somewhat by taking advantage of the fact 
that the operands are sorted.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105546 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-07 19:20:57 +00:00
Dan Gohman
1f23d63ddf Micro-optimize this, to speed up this hotspot in debug builds a little. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105544 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-07 19:16:37 +00:00
Dan Gohman
ef07158c11 Micro-optimize this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105542 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-07 19:12:54 +00:00
Dan Gohman
4d52c6d622 Optimize ScalarEvolution's SCEVComplexityCompare predicate: don't go 
scrounging through SCEVUnknown contents and SCEVNAryExpr operands;
instead just do a simple deterministic comparison of the precomputed
hash data.

Also, since this is more precise, it eliminates the need for the slow
N^2 duplicate detection code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105540 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-07 19:06:13 +00:00
Dan Gohman
700012231d ConstantFoldConstantExpression can theoretically return null. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104948 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 16:12:08 +00:00
Dan Gohman
acd8cab843 Use the SCEVAddRecExpr::getPostIncExpr utility function instead 
of doing the same thing manually.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102997 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 01:12:27 +00:00
Dan Gohman
c0ed0091dc Fix a copy+pasto. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102996 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 01:11:15 +00:00
Dan Gohman
deff621abd Use getConstant instead of getIntegerSCEV. The two are basically the 
same, now that getConstant has overloads consistent with ConstantInt::get.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102965 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 22:09:21 +00:00
Dan Gohman
f16c6803d7 Silence warnings about -1 being converted to an unsigned value. 
Also, pass true for isSigned even when creating constants for unsigned
comparisons, because the point is to create an all-ones constant,
rather than UINT64_MAX, even for integers wider than 64 bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102946 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 20:23:47 +00:00
Dan Gohman
34c3e36e63 Use isTrueWhenEqual and isFalseWhenEqual instead of assuming that 
SimplifyICmpOperands will simplify such cases to EQ or NE. This makes
the correcntess of the code independent on SimplifyICmpOperands doing
certain simplifications.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102927 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 18:00:24 +00:00
Dan Gohman
a189bae771 In ScalarEvolution::print, don't bother printing out the SCEVs for 
comparison instructions, since they aren't interesting, despite having
integer result types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102925 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 17:03:23 +00:00
Dan Gohman
3abb69c07f In SimplifyICmpOperands, avoid needlessly swapping the operands in the 
case where both are addrecs in unrelated loops.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102924 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 17:00:11 +00:00
Dan Gohman
03557dc0ad Factor out the new <= and >= analysis code into SimplifyICmpOperands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102922 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 16:35:17 +00:00
Dan Gohman
8833c32108 Set isSigned to true when creating an all-ones integer constant, even 
for unsigned purposes, so >64-bit integer values get a full all-ones
value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102739 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 19:22:39 +00:00
Dan Gohman
b6fd0b481c Silence compiler warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102734 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 19:21:13 +00:00
Dan Gohman
9f93d30a26 ScalarEvolution support for <= and >= loops. 
Also, generalize ScalarEvolutions's min and max recognition to handle
some new forms of min and max that this change makes more common.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102234 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-24 03:09:42 +00:00
Dan Gohman
d19bba69ad Use SimplifyICmpOperands in isKnownPredicate too. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102233 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-24 01:38:36 +00:00
Dan Gohman
d4da5af271 Update isImpliedCond to use the new SimplifyICmpOperands utility. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102232 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-24 01:34:53 +00:00
Dan Gohman
e979650fa5 Add a new utility function SimplifyICmpOperands. Much of this code is 
refactored out of ScalarEvolution::isImpliedCond, which will be updated
to use this new utility routine soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102229 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-24 01:28:42 +00:00
Dan Gohman
c6863989fc When it doesn't matter whether zero or sign extension is used, 
use ScalarEvolutions "any" extend function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102156 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-23 01:51:29 +00:00
Dan Gohman
ddb3eafc32 Don't attempt to analyze values which are obviously undef. This fixes some 
assertion failures in extreme cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102042 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-22 01:35:11 +00:00
Dan Gohman
a560fd28c0 Make ScalarEvolution::getConstant support pointer types, for consistency 
with ScalarEvolution's overall approach to pointer types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102003 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-21 16:04:04 +00:00
Dan Gohman
a5145c8d5a Fix SCEVCommutativeExpr::print to be robust in the case of improper 
expression canonicalization. Its job is to print what's there, not to
make judgements about it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101461 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-16 15:03:25 +00:00
Dan Gohman
005752bbe7 Make getPredecessorWithUniqueSuccessorForBB return the unique successor 
in addition to the predecessor.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101374 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-15 16:19:08 +00:00
Dan Gohman
2c93e39072 Add a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101248 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-14 16:08:56 +00:00
Dan Gohman
28287794d4 Teach ScalarEvolution to simplify smax and umax when it can prove 
that one operand is always greater than another.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101142 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-13 16:51:03 +00:00
Dan Gohman
3ab131243e Minor code micro-optimizations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101141 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-13 16:49:23 +00:00
Dan Gohman
bca091d561 Micro-optimize a few hot spots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101086 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-12 23:08:18 +00:00
Dan Gohman
6ab10f69a9 Add fast paths to ScalarEvolution::getSizeOf and getOffsetOf, as 
they're used a lot by getNodeForGEP, which can be called a lot.
This speeds up -iv-users by around 15% on several testcases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101083 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-12 23:03:26 +00:00
Dan Gohman
27dead44e0 Generalize ScalarEvolution's PHI analysis to handle loops that don't 
have preheaders or dedicated exit blocks, as clients may not otherwise
need to run LoopSimplify.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101030 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-12 07:49:36 +00:00