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Author SHA1 Message Date
Dan Gohman
3e22b7c916 Instead of having CollectSubexpr's categorize operands as interesting or 
uninteresting, just put all the operands on one list and make
GenerateReassociations make the decision about what's interesting.
This is simpler, and it avoids an extra ScalarEvolution::getAddExpr call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111133 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-16 15:50:00 +00:00
Dan Gohman
4065f60912 Put add operands in ScalarEvolution-canonical order, when convenient. 
This isn't necessary, because ScalarEvolution sorts them anyway,
but it's tidier this way.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111132 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-16 15:39:27 +00:00
Dan Gohman
e2c6d131d1 Teach SimplifyCFG how to simplify indirectbr instructions. 
- Eliminate redundant successors.
 - Convert an indirectbr with one successor into a direct branch.

Also, generalize SimplifyCFG to be able to be run on a function entry block.
It knows quite a few simplifications which are applicable to the entry
block, and it only needs a few checks to avoid trouble with the entry block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111060 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-14 00:29:42 +00:00
Dan Gohman
e62d58884a Fix LSR's ExtractImmediate and ExtractSymbol to avoid calling 
ScalarEvolution::getAddExpr, which can be pretty expensive, when nothing
has changed, which is pretty common.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111042 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-13 21:17:19 +00:00
Chris Lattner
1522ce9770 fix PR7876: If ipsccp decides that a function's address is taken 
before it rewrites the code, we need to use that in the post-rewrite pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110962 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-12 22:25:23 +00:00
Owen Anderson
5015b3417f Don't attempt the PRE inline asm calls, since we don't value number them yet. Fixes PR7835. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110489 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-07 00:20:35 +00:00
Owen Anderson
90c579de5a Reapply r110396, with fixes to appease the Linux buildbot gods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-06 18:33:48 +00:00
Nick Lewycky
e52e9d6045 Fix uninitialized variable warning. 
Also move 'default' case next to a real case to help compiler optimize in
non-Debug builds.
No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110435 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-06 07:43:46 +00:00
Owen Anderson
1f74590e9d Revert r110396 to fix buildbots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-06 00:23:35 +00:00
Owen Anderson
9ccaf53ada Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static 
ID member as the sole unique type identifier.  Clean up APIs related to this change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-05 23:42:04 +00:00
Owen Anderson
f35b08db50 Give JumpThreading+LVI a long-form cl::opt so that it's easier to toggle the default. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110384 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-05 22:11:31 +00:00
Owen Anderson
b57e6558c7 Experiments show that we can safely increase our unrolling threshold without unduly impacting code size, particularly 
since unrolling is not enabled at -Os.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110233 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-04 18:32:46 +00:00
Dan Gohman
4eaee28e34 Fix whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110223 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-04 17:43:57 +00:00
Dan Gohman
2511bd06de Fix a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110181 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-04 01:16:35 +00:00
Peter Collingbourne
3bababf880 Add an atomic lowering pass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110113 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-03 16:19:16 +00:00
Oscar Fuentes
ee56c42168 Prefix next' iterator operation with llvm::'. 
Fixes potential ambiguity problems on VS 2010.

Patch by nobled!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110029 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-08-02 06:00:15 +00:00
Nick Lewycky
39a383124b Add missing newline to debug statement. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109886 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-30 20:27:01 +00:00
Gabor Greif
7d3056b160 simplify by using CallSite constructors; virtually eliminates CallSite::get from the tree 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109687 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-28 22:50:26 +00:00
Gabor Greif
d09475c226 use Value* constructor of CallSite to create potentially improper site, and test that 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109581 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-28 14:28:18 +00:00
Gabor Greif
a292b2f49f recommit simplification (r109502, backed out r109509); seems to innocent 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109510 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-27 16:44:23 +00:00
Gabor Greif
5b0c25313e back out this too to restore the bots 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109509 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-27 15:56:07 +00:00
Gabor Greif
50da18171e simplify 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109502 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-27 13:31:22 +00:00
Owen Anderson
cfa7fb6df5 Add an initial implementation of LazyValueInfo updating for JumpThreading. Disabled for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109424 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-26 18:48:03 +00:00
Dan Gohman
052f000158 Remove LCSSA's bogus dependence on LoopSimplify and LoopSimplify's bogus 
dependence on DominanceFrontier. Instead, add an explicit DominanceFrontier
pass in StandardPasses.h to ensure that it gets scheduled at the right
time.

Declare that loop unrolling preserves ScalarEvolution, and shuffle some
getAnalysisUsages.

This eliminates one LoopSimplify and one LCCSA run in the standard
compile opts sequence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109413 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-26 18:11:16 +00:00
Dan Gohman
b7aa26bbdb Use DominatorTree::properlyDominates instead of dominates with an 
explicit inequality check.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109401 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-26 17:37:36 +00:00
Dan Gohman
cb6816dc81 A block dominates itself, by definition. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109400 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-26 17:35:32 +00:00
Gabor Greif
96f1d8ebdd mass elimination of reliance on automatic iterator dereferencing 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109103 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-22 13:36:47 +00:00
Gabor Greif
a399781289 undo 80 column trespassing I caused 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109092 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-22 10:37:47 +00:00
Owen Anderson
d13db2c59c Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109045 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-21 22:09:45 +00:00
Dan Gohman
43ef3fbae1 Remember that the induction variable is always a PHINode and 
use getIncomingValueForBlock instead of
LoopInfo::getCanonicalInductionVariableIncrement.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108865 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-20 17:18:52 +00:00
Dan Gohman
1e381fcd55 Reorder the contents of various getAnalysisUsage functions, eliminating 
a redundant loopsimplify run from the default -O2 sequence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108539 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-16 17:58:45 +00:00
Gabor Greif
a6aac4c5bc eliminate CallInst::ArgOffset 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108522 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-16 09:38:02 +00:00
Dan Gohman
a9db129730 Don't merge uses when they are targetting fixup sites with 
different widths. In a use with a narrower fixup, formulae
may be wider than the fixup, in which case the high bits
aren't necessarily meaningful, so it isn't safe to reuse
them for uses with wider fixups.

This fixes PR7618, though the testcase is too large for a
reasonable regression test, since it heavily dependes on
hitting LSR's heuristics in a certain way.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108455 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 20:24:58 +00:00
Dan Gohman
ef4308d6ba Use dbgs() instead of errs() in a DEBUG. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108453 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 20:12:42 +00:00
Dan Gohman
c88c1a4581 Watch out for a constant offset cancelling out a base register, forming 
a zero. This situation arrises in Fortran code with induction variables
that start at 1 instead of 0. This fixes PR7651.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108424 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 15:14:45 +00:00
Duncan Sands
d0d3ccc827 Handle the case of a tail recursion in which the tail call is followed 
by a return that returns a constant, while elsewhere in the function
another return instruction returns a different constant.  This is a
special case of accumulator recursion, so just generalize the existing
logic a bit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108241 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-13 15:41:41 +00:00
Gabor Greif
ee1f44fba3 cache results of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108142 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 14:10:24 +00:00
Gabor Greif
110b75aa75 cache dereferenced iterators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108138 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 12:03:02 +00:00
Gabor Greif
639e9e47a2 recommit r108131 (hich has been backed out in r108135) with a fix 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108137 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 12:02:10 +00:00
Gabor Greif
e99e077522 back out r108131 (of TailDuplication.cpp) for now, it causes a buildbot failure 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108135 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 11:32:39 +00:00
Gabor Greif
a8b9df7bd9 cache dereferenced iterators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108131 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 10:36:48 +00:00
Duncan Sands
3472766f9e Convert some tab stops into spaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108130 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 08:16:59 +00:00
Chris Lattner
0a96144aac if jump threading is able to infer interesting values on both 
the LHS and RHS of an and/or instruction, don't multiply add
known predecessor values.  This fixes the crash on testcase
from PR7498


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108114 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-12 00:47:34 +00:00
Duncan Sands
24080a9878 The accumulator tail recursion transform claims to work for any associative 
operation, but the way it's implemented requires the operation to also be
commutative.  So add a check for commutativity (and tweak the corresponding
comments).  This makes no difference in practice since every associative
LLVM instruction is also commutative!  Here's an example to show the need
for commutativity: the accum_recursion.ll testcase calculates the factorial
function.  Before the transformation the result of a call is
  ((((1*1)*2)*3)...)*x
while afterwards it is
  (((1*x)*(x-1))...*2)*1
which clearly requires both associativity and commutativity of * to be equal
to the original.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108056 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-10 20:31:42 +00:00
Gabor Greif
7656018c22 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107976 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 15:40:10 +00:00
Gabor Greif
1d3ae029c4 cache result of operator* (found by inspection) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107971 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 14:48:08 +00:00
Gabor Greif
0814985887 cache result of operator* 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107969 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-09 14:36:49 +00:00
Chris Lattner
0238f8c430 Fix the second half of PR7437: scalarrepl wasn't preserving 
address spaces when SRoA'ing memcpy's.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107846 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-08 00:27:05 +00:00
Nick Lewycky
10d2f4d01b Detabify this file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107637 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-06 03:53:43 +00:00
Dan Gohman
8c1ffae068 Don't claim to preserve AliasAnalysis. First, this is doesn't actually 
have any effect, and second, deleting stores can potentially invalidate
an AliasAnalysis, and there's currently no notification for this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107496 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-02 18:43:05 +00:00
Gabor Greif
8e1ebff9f1 use ArgOperand API 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107278 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 12:42:43 +00:00
Gabor Greif
6e1f330c4c use getArgOperand (corrected by CallInst::ArgOffset) instead of getOperand 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107273 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 09:19:23 +00:00
Gabor Greif
237e1da16a use getNumArgOperands instead of getNumOperands 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107272 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 09:17:53 +00:00
Gabor Greif
6f14c8c7c1 use getArgOperand instead of getOperand 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107271 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 09:16:16 +00:00
Gabor Greif
ad72e73136 use getArgOperand instead of getOperand 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107270 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-30 09:15:28 +00:00
Gabor Greif
d6bf5cf641 employ CallInst::ArgOffset (for now) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107015 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-28 16:43:57 +00:00
Gabor Greif
19101c7585 use cached value 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107000 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-28 11:20:42 +00:00
Chris Lattner
1495247f51 minor cleanup to SROA: when lowering type unsafe accesses to 
large integers, the first inserted value would always create
an 'or X, 0'.  Even though this is trivially zapped by
instcombine, don't bother creating this pointless instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106979 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-27 07:58:26 +00:00
Duncan Sands
d50e9e2566 Fix PR7328: when turning a tail recursion into a loop, need to preserve 
the returned value after the tail call if it differs from other return
values.  The optimal thing to do would be to introduce a phi node for
the return value, but for the moment just fix the miscompile.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106947 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-26 12:53:31 +00:00
Dan Gohman
3e3f15bb09 In GenerateReassociations, don't bother thinking about individual 
SCEVUnknown values which are loop-variant, as LSR can't do anything
interesting with these values in any case. This fixes very slow compile
times on loops which have large numbers of such values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106897 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-25 22:32:18 +00:00
Dale Johannesen
1784d160e4 The hasMemory argument is irrelevant to how the argument 
for an "i" constraint should get lowered; PR 6309.  While
this argument was passed around a lot, this is the only
place it was used, so it goes away from a lot of other
places.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106893 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-25 21:55:36 +00:00
Gabor Greif
7f1d7f5779 use ArgOperand API; tighten type of handleFreeWithNonTrivialDependency to be able to use isFreeCall whithout a cast or new overload 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106823 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-25 07:40:32 +00:00
Dan Gohman
2ea09e0546 A few minor micro-optimizations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106764 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 16:57:52 +00:00
Dan Gohman
d42819a07b Teach getExactSDiv to evaluate x/1 to x up front, as it's a common 
enough special case, and it theoretically allows more folding because
it works even when x is unanalyzable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106763 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 16:51:25 +00:00
Dan Gohman
473e63512a Fix copy+pasto issues in isMulSExtable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106759 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 16:45:11 +00:00
Gabor Greif
3ccbb22eaf use ArgOperand API; introduce downcasted pointers into scope to facilitate this 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106734 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 12:03:56 +00:00
Gabor Greif
aee5dc1939 use ArgOperand API 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106731 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 10:42:46 +00:00
Gabor Greif
d883a9d1ed use ArgOperand API 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106730 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 10:17:17 +00:00
Gabor Greif
0a14be0693 use callsite to obtain all arguments 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106729 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 10:04:07 +00:00
Gabor Greif
407014f9a5 use getNumArgOperands 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106709 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 00:48:48 +00:00
Gabor Greif
de9f5452d3 use ArgOperand API 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106707 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 00:44:01 +00:00
Devang Patel
e9916a302f Use ValueMap instead of DenseMap. 
The ValueMapper used by various cloning utility maps MDNodes also.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106706 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-24 00:33:28 +00:00
Dan Gohman
caf71ab473 Fix OptimizeMax to handle an odd case where one of the max operands 
is another max which folds. This fixes PR7454.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106594 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-22 23:07:13 +00:00
Dan Gohman
fe60104ac9 Use pre-increment instead of post-increment when the result is not used. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106542 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-22 15:08:57 +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
74e5ef096e Add a TODO comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106397 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-19 21:30:18 +00:00
Dan Gohman
1e3121c80a Include the use kind along with the expression in the key of the 
use sharing map. The reconcileNewOffset logic already forces a
separate use if the kinds differ, so incorporating the kind in the
key means we can track more sharing opportunities.

More sharing means fewer total uses to track, which means smaller
problem sizes, which means the conservative throttles don't kick
in as often.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106396 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-19 21:29:59 +00:00
Dan Gohman
b6211710ac Don't include things in anonymous namespaces that don't need it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106395 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-19 21:21:39 +00:00
Dan Gohman
a52838285b Disable indvars on loops when LoopSimplify form is not available. 
This fixes PR7333.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106267 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-18 01:35:11 +00:00
Rafael Espindola
e96af56a5b Make sure that simplify libcalls does not replace a call with one calling 
convention with a new call with a different calling convention.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106134 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-16 19:34:01 +00:00
Benjamin Kramer
ea9ca0236d simplify-libcalls: fold strncmp(x, y, 1) -> memcmp(x, y, 1) 
The memcmp will be optimized further and even the pathological case
'strstr(x, "x") == x' generates optimal code now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106097 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-16 10:30:29 +00:00
Benjamin Kramer
386e918438 simplify-libcalls: fold strstr(a, b) == a -> strncmp(a, b, strlen(b)) == 0 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106047 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-15 21:34:25 +00:00
Chris Lattner
e58867e55e jump threading can't split a critical edge from an indirectbr. This 
fixes PR7356.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105950 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-14 19:45:43 +00:00
Benjamin Kramer
c05cb8d561 SimplifyCFG: don't turn volatile stores to null/undef into unreachable. Fixes PR7369. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105914 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-13 14:35:54 +00:00
Kenneth Uildriks
42c7d23c6d Pulled CodeMetrics out of InlineCost.h and made it a bit more general, so it can be reused from PartialSpecializationCost 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105725 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-09 15:11:37 +00:00
Dan Gohman
a15ec5dfcc Don't track users of undef values; they aren't interesting for 
register pressure.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105501 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-04 23:16:05 +00:00
Dan Gohman
dd9344f3fa Move FindAvailableLoadedValue isSafeToLoadUnconditionally out of 
lib/Transforms/Utils and into lib/Analysis so that Analysis passes
can use them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104949 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 16:19:17 +00:00
Benjamin Kramer
1464c1d60a Kill unneeded SExt. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104692 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 09:45:04 +00:00
Benjamin Kramer
48aefe15d0 Properly promote operands when optimizing a single-character memcmp. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104648 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-25 22:53:43 +00:00
Dan Gohman
0fe46d9b48 DominatorTree.getNode can return null for unreachable blocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104290 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 22:46:54 +00:00
Dan Gohman
9f383eb950 Minor code cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104287 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 22:25:20 +00:00
Dan Gohman
a552878508 Make Solve check its own post-condition, to reduce clutter in the 
top-level LSRInstance logic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104278 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 20:59:23 +00:00
Dan Gohman
76c315a26c Add comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104276 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 20:52:00 +00:00
Dan Gohman
402d43529c More code cleanups. Use iterators instead of indices when indices 
aren't needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104273 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 20:33:18 +00:00
Dan Gohman
c6519f916b Fix OptimizeShadowIV to set Changed. Change OptimizeLoopTermCond to set 
Changed directly instead of using a return value.

Rename FilterOutUndesirableDedicatedRegisters's Changed variable to
distinguish it from LSRInstance's Changed member.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104269 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 20:05:31 +00:00
Dan Gohman
f7ff37d674 Add some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104268 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 20:00:41 +00:00
Dan Gohman
d974a0e9d6 Simplify this code. Don't do a DomTreeNode lookup for each visited block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104267 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 20:00:25 +00:00
Dan Gohman
ea507f5c28 Minor code cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104263 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 19:44:23 +00:00
Dan Gohman
f182b23f8f When canonicalizing icmp operand order to put the loop invariant 
operand on the left, the interesting operand is on the right. This
fixes a bug where LSR was failing to recognize ICmpZero uses,
which led it to be unable to reverse the induction variable in the
attached testcase.

Delete test/CodeGen/X86/stack-color-with-reg-2.ll, because its test
is extremely fragile and hard to meaningfully update.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104262 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 19:26:52 +00:00
Dan Gohman
9da1bf4845 Set Changed to true when canonicalizing ICmp operand order; even though 
it isn't a very interesting change, it's a change nonetheless.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104260 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-20 19:16:03 +00:00