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118 Commits

Author SHA1 Message Date
Dan Gohman
0f8f7f179d Add Loop contains utility methods for testing whether a loop 
contains another loop, or an instruction. The loop form is
substantially more efficient on large loops than the typical
code it replaces.

llvm-svn: 91654
 2009-12-18 01:24:09 +00:00
Dan Gohman
3c155aa3cd Update various Loop optimization passes to cope with the possibility that 
LoopSimplify form may not be available.

llvm-svn: 86175
 2009-11-05 21:11:53 +00:00
Nick Lewycky
cacdc4d65a Remove ICmpInst::isSignedPredicate which was a reimplementation 
CmpInst::isSigned.

llvm-svn: 85037
 2009-10-25 05:20:17 +00:00
Chris Lattner
5f54c5bd1c eliminate VISIBILITY_HIDDEN from Transforms/Scalar. PR4861 
llvm-svn: 80766
 2009-09-02 06:11:42 +00:00
Chris Lattner
f37893e7a1 Fix PR3913, patch by Jakub Staszak! 
llvm-svn: 80327
 2009-08-28 00:43:14 +00:00
Owen Anderson
9df206d02d Push LLVMContexts through the IntegerType APIs. 
llvm-svn: 78948
 2009-08-13 21:58:54 +00:00
Owen Anderson
cc33e89571 Revert the ConstantInt constructors back to their 2.5 forms where possible, thanks to contexts-on-types. More to come. 
llvm-svn: 77011
 2009-07-24 23:12:02 +00:00
Owen Anderson
cc287b28c9 Get rid of the Pass+Context magic. 
llvm-svn: 76702
 2009-07-22 00:24:57 +00:00
Owen Anderson
49226b1075 This started as a small change, I swear. Unfortunately, lots of things call the [I|F]CmpInst constructors. Who knew!? 
llvm-svn: 75200
 2009-07-09 23:48:35 +00:00
Owen Anderson
121f736d9c "LLVMContext* " --> "LLVMContext *" 
llvm-svn: 74878
 2009-07-06 23:00:19 +00:00
Owen Anderson
6795819c9e Second batch of passes using LLVMContext. 
llvm-svn: 74753
 2009-07-03 00:54:20 +00:00
Dan Gohman
28702fab4e Don't try to split a loop when the controlling icmp instruction 
doesn't have an IV-based operand. This fixes PR4471.

llvm-svn: 74399
 2009-06-27 22:58:27 +00:00
Dan Gohman
2e737ac21f Support vector casts in more places, fixing a variety of assertion 
failures.

To support this, add some utility functions to Type to help support
vector/scalar-independent code. Change ConstantInt::get and
ConstantFP::get to support vector types, and add an overload to
ConstantInt::get that uses a static IntegerType type, for
convenience.

Introduce a new getConstant method for ScalarEvolution, to simplify
common use cases.

llvm-svn: 73431
 2009-06-15 22:12:54 +00:00
Eli Friedman
334cc4e389 Fix loop-index-split to correctly preserve dominance frontiers. Part of 
PR4238.

llvm-svn: 72244
 2009-05-22 03:22:46 +00:00
Duncan Sands
880eaf5278 Allow readonly functions to unwind exceptions. Teach 
the optimizers about this.  For example, a readonly
function with no uses cannot be removed unless it is
also marked nounwind.

llvm-svn: 71071
 2009-05-06 06:49:50 +00:00
Dan Gohman
8b1b8d5891 Reword and tidy up some comments. 
llvm-svn: 70416
 2009-04-29 22:01:05 +00:00
Owen Anderson
f127f4a7a9 LoopIndexSplit needs to inform the loop pass manager of the instructions it is 
deleting, not just the basic block.

llvm-svn: 69011
 2009-04-14 01:04:19 +00:00
Devang Patel
ec65625744 Loop Index Split can eliminate a loop if it can determin if loop body is executed only once. There was a bug in determining IV based value of the iteration for which the loop body is executed. Fix it. 
llvm-svn: 68071
 2009-03-30 22:24:10 +00:00
Devang Patel
8c31ea5290 Before deleting a basic block, give other loop passes a chance cleanup analysis values, related to the instructions in the basic block. 
llvm-svn: 67719
 2009-03-25 23:57:48 +00:00
Devang Patel
e98e6bc27c If branch conditions' one successor is dominating another non-latch successor then this loop's iteration space can not be restricted. In this example block bb5 is always executed. 
llvm-svn: 65902
 2009-03-02 23:39:14 +00:00
Dan Gohman
ced54f0173 LoopIndexSplit doesn't actually use ScalarEvolution. 
llvm-svn: 64811
 2009-02-17 20:50:11 +00:00
Dan Gohman
f74d17b36a Add a utility function to LoopInfo to return the exit block 
when the loop has exactly one exit, and make use of it in
LoopIndexSplit.

llvm-svn: 64388
 2009-02-12 18:08:24 +00:00
Devang Patel
85ae609834 Ignore DbgInfoIntrinsics. 
llvm-svn: 63923
 2009-02-06 06:19:06 +00:00
Devang Patel
a8d0117253 Fix spelling. 
Thanks Duncan!

llvm-svn: 60702
 2008-12-08 17:07:24 +00:00
Devang Patel
4fcea36b8b Rewrite code that 1) filters loops and 2) calculates new loop bounds. 
This fixes many bugs. I will add more test cases in a separate check-in.

Some day, the code that manipulates CFG and updates dom. info could use refactoring help.

llvm-svn: 60554
 2008-12-04 21:38:42 +00:00
Devang Patel
f0d6bd18d5 If the sign of exit condition and split condition does not match 
then do not split loop index.

llvm-svn: 58995
 2008-11-10 19:48:34 +00:00
Daniel Dunbar
5447f9679d Change create*Pass factory functions to return Pass* instead of 
LoopPass*.
 - Although less precise, this means they can be used in clients
   without RTTI (who would otherwise need to include LoopPass.h, which
   eventually includes things using dynamic_cast). This was the
   simplest solution that presented itself, but I am happy to use a
   better one if available.

llvm-svn: 58010
 2008-10-22 23:32:42 +00:00
Devang Patel
255fee3bce Check loop exit predicate properly while eliminating one iteration loop. 
This patch fixes PR 2869

llvm-svn: 57369
 2008-10-10 22:02:57 +00:00
Devang Patel
378c8633e5 Fix typo, fix PR 2865. 
llvm-svn: 57221
 2008-10-06 23:22:54 +00:00
Devang Patel
1e7ddf5d31 splitLoop does not handle split condition EQ. 
Fixes PR 2805

llvm-svn: 56321
 2008-09-18 23:45:14 +00:00
Devang Patel
50c22bf69b Do not ignore iv uses outside the loop. 
This one slipped through cracks very well.

llvm-svn: 56284
 2008-09-17 17:53:47 +00:00
Dan Gohman
e1f9be27bc Tidy up several unbeseeming casts from pointer to intptr_t. 
llvm-svn: 55779
 2008-09-04 17:05:41 +00:00
Dan Gohman
027326ba3e Use empty() instead of begin() == end(). 
llvm-svn: 54780
 2008-08-14 18:13:49 +00:00
Devang Patel
2b56d5281d If loop induction variable's start value is less then its exit value then do not split the loop. 
llvm-svn: 53265
 2008-07-09 00:12:01 +00:00
Dan Gohman
e9f0a28c64 Fix a typo in a comment. 
llvm-svn: 52687
 2008-06-24 18:00:21 +00:00
Devang Patel
9f385d71c2 Do not erase induction variable increment if it is used outside the loop. 
llvm-svn: 51280
 2008-05-19 22:23:55 +00:00
Gabor Greif
d61f20217a API change for {BinaryOperator|CmpInst|CastInst}::create*() --> Create. Legacy interfaces will be in place for some time. (Merge from use-diet branch.) 
llvm-svn: 51200
 2008-05-16 19:29:10 +00:00
Dan Gohman
bab18cae46 Clean up the use of static and anonymous namespaces. This turned up 
several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017
 2008-05-13 00:00:25 +00:00
Bill Wendling
277f2a205d Porting r50563 from Tak to mainline. 
llvm-svn: 50564
 2008-05-02 00:43:20 +00:00
Gabor Greif
6c6b8a57f3 API changes for class Use size reduction, wave 1. 
Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277
 2008-04-06 20:25:17 +00:00
David Greene
0ca05878fe Iterators folloring a SmallVector erased element are invalidated so 
don't access cached iterators from after the erased element.

Re-apply 49056 with SmallVector support.

llvm-svn: 49106
 2008-04-02 18:24:46 +00:00
Tanya Lattner
221aec3ddb Reverting 49056 due to the build being broken. 
llvm-svn: 49060
 2008-04-01 23:41:44 +00:00
David Greene
f322cc7462 Iterators folloring a SmallVector erased element are invalidated so 
don't access cached iterators from after the erased element.

llvm-svn: 49056
 2008-04-01 22:14:23 +00:00
Devang Patel
85770c83ba PHI->removeIncomingValue may remove PHInode. 
Increment iterator in advance.

llvm-svn: 48890
 2008-03-27 17:32:46 +00:00
Devang Patel
425514c509 Add incoming value from header only if phi node has any use inside the loop. 
llvm-svn: 48738
 2008-03-24 20:16:14 +00:00
Devang Patel
8af92b942c If loop header is also loop exiting block then OrigPN is incoming value for B loop header. 
Fixes PR 2030.

llvm-svn: 47141
 2008-02-14 23:18:47 +00:00
Devang Patel
38de2d11a5 A loop latch phi node may have uses inside loop, not just in loop header. 
llvm-svn: 47093
 2008-02-13 22:23:07 +00:00
Devang Patel
1e71afe2df While moving exit condition, do not drop loop latch on the floor. 
llvm-svn: 47089
 2008-02-13 22:06:36 +00:00
Devang Patel
d48bbbf07b Keep track of exit value operand number when operands are swapped. 
llvm-svn: 47082
 2008-02-13 19:48:48 +00:00
Devang Patel
9aba178666 Fix PR 1995. 
llvm-svn: 46898
 2008-02-08 22:49:13 +00:00