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676 Commits

Author SHA1 Message Date
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
Dan Gohman
646e047765 Rewrite the overflow checking in the get{Signed,Unsigned}Range code for 
AddRecs so that it checks for overflow in the computation that it is
performing, rather than just checking hasNo{Signed,Unsigned}Wrap, since
those flags are for a different computation. This fixes a bug that
impacts an upcoming change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101028 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-12 07:39:33 +00:00
Dan Gohman
5ee60f7508 Fix indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101001 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-11 23:44:58 +00:00
Dan Gohman
53c66eacc4 Enhance ScalarEvolution::isKnownPredicate with support for 
loop conditions which are invariants.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100995 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-11 22:16:48 +00:00
Dan Gohman
b64cf896f8 Minor code simplification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100994 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-11 22:13:11 +00:00
Dan Gohman
bc7129f9db When creating a ConstantRange for [n,UINT_MAX], special case n == 0, because 
ConstantRange(0, 0) creates an empty range rather than a full one.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100993 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-11 22:12:18 +00:00
Dan Gohman
3948d0b8b0 Rename isLoopGuardedByCond to isLoopEntryGuardedByCond, to emphasise 
that it's only testing for the entry condition, not full loop-invariant
conditions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100979 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-11 19:27:13 +00:00
Dan Gohman
e056781323 Add variants of ult, ule, etc. which take a uint64_t RHS, for convenience. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100824 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-08 23:03:40 +00:00
Dan Gohman
8ef5caa80a Revert this change from a while ago; ScalarEvolution shouldn't analyze 
undef as 0, since it can't force other analyses to intepret the undef
in the same way.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100749 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-08 05:58:24 +00:00
Dan Gohman
9553188fcc Define placement new wrappers for BumpPtrAllocator and 
RecyclingAllocator to allow client code to be simpler, and
simplify several clients.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98847 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-18 18:49:47 +00:00
Dan Gohman
c93b4cff89 Add the ability to "intern" FoldingSetNodeID data into a 
BumpPtrAllocator-allocated region to allow it to be stored in a more
compact form and to avoid the need for a non-trivial destructor call.

Use this new mechanism in ScalarEvolution instead of
FastFoldingSetNode to avoid leaking memory in the case where a
FoldingSetNodeID uses heap storage, and to reduce overall memory
usage.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98829 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-18 16:16:38 +00:00
Dan Gohman
f9e64729af Reapply r98755 with a thinko which miscompiled gengtype fixed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98793 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-18 01:17:13 +00:00
Dan Gohman
ebf78f18df Revert 98755, which may be causing trouble. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98762 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-17 19:54:53 +00:00
Dan Gohman
0afc29c3e6 Change SCEVNAryExpr's operand array from a SmallVector to a plain 
pointer and length, and allocate the arrays in ScalarEvolution's
BumpPtrAllocator, so that they get released when their owning
SCEV gets released. SCEVs are immutable, so they don't need to worry
about operand array resizing. This fixes a memory leak reported
in PR6637.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98755 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-17 18:51:01 +00:00
Dan Gohman
4ecbca558f Avoid analyzing instructions in blocks not reachable from the entry block. 
They are lots of trouble, and they don't matter. This fixes PR6559.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98103 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-09 23:46:50 +00:00
Dan Gohman
3f46a3abee Spelling fixes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97453 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-01 17:49:51 +00:00
Dan Gohman
8566963713 Make LoopSimplify change conditional branches in loop exiting blocks 
which branch on undef to branch on a boolean constant for the edge
exiting the loop. This helps ScalarEvolution compute trip counts for
loops.

Teach ScalarEvolution to recognize single-value PHIs, when safe, and
ForgetSymbolicName to forget such single-value PHI nodes as apprpriate
in ForgetSymbolicName.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97126 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-25 06:57:05 +00:00
Dan Gohman
e177c9a9bc ConstantFoldInstOperands can theoretically return null if it 
didn't fold anything.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97049 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-24 19:31:47 +00:00
Dan Gohman
8f767d987f Simplify this code; these casts aren't necessary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97048 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-24 19:31:06 +00:00
Dan Gohman
f6d009fb6f Convert a few more backedge-taken count functions to use BackedgeTakenInfo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97042 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-24 17:31:30 +00:00
Dan Gohman
454d26dc43 Remove unused variables and parameters. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96780 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-22 04:11:59 +00:00
Dan Gohman
bc02853b89 Add a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96688 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-19 18:49:22 +00:00
Dan Gohman
00cb5b7245 Teach ScalarEvolution how to compute a tripcount for a loop with 
true or false as its exit condition. These are usually eliminated by
SimplifyCFG, but the may be left around during a pass which wishes
to preserve the CFG.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96683 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-19 18:12:07 +00:00
Dale Johannesen
45a2d7d44a recommit 96626, evidence that it broke things appears 
to be spurious



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96662 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-19 07:14:22 +00:00
Dale Johannesen
efd9e95051 Revert 96626, which causes build failure on ppc Darwin. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96653 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-19 01:54:37 +00:00
Dan Gohman
aa11defd1c Indvars needs to explicitly notify ScalarEvolution when it is replacing 
a loop exit value, so that if a loop gets deleted, ScalarEvolution
isn't stick holding on to dangling SCEVAddRecExprs for that loop. This
fixes PR6339.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96626 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-18 23:26:33 +00:00