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120 Commits

Author SHA1 Message Date
Chris Lattner
6d9d13d2e4 more refactoring, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26194 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-15 01:44:42 +00:00
Chris Lattner
fed5d9dbd3 pull some code out into a function 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26191 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-15 00:07:43 +00:00
Chris Lattner
3dd4c402de Use statistics to keep track of what flavors of loops we are unswitching 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26157 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-14 01:01:41 +00:00
Chris Lattner
c23580969f implement unswitching of loops with switch stmts and selects in them 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26114 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-11 00:43:37 +00:00
Chris Lattner
e825593bf2 Update PHI nodes in successors of exit blocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26113 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-10 23:26:14 +00:00
Chris Lattner
b2bc315eac Reform the unswitching code in terms of edge splitting, not block splitting. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26112 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-10 23:16:39 +00:00
Chris Lattner
81be2e961b Fix a case where UnswitchTrivialCondition broke critical edges with 
phi's in the successors


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26108 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-10 19:08:15 +00:00
Chris Lattner
708e1a5c9c add some notes, move some code around. Implement unswitching of loops 
with branches on partially invariant computations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26104 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-10 02:30:37 +00:00
Chris Lattner
dd3ee6d086 Move code around to be more logical, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26103 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-10 02:01:22 +00:00
Chris Lattner
4d1ca946ea When unswitching a trivial loop, do admit we are doing it! :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26102 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-10 01:36:35 +00:00
Chris Lattner
4c41d49a92 Implement unconditional unswitching of 'trivial' loops, those loops that contain 
branches in their entry block that control whether or not the loop is a noop or not.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26101 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-10 01:24:09 +00:00
Chris Lattner
f4f5f4e56f Simplify control flow a bit, note that unswitch preserves canonical loop form 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26098 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-09 22:15:42 +00:00
Chris Lattner
e487abbfbf Make the threshold a parameter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26093 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-09 20:15:48 +00:00
Chris Lattner
2f4b898e8c Simplify the loop-unswitch pass, by not even trying to unswitch loops with 
uses of loop values outside the loop.  We need loop-closed SSA form to do
this right, or to use SSA rewriting if we really care.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26089 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-09 19:14:52 +00:00
Chris Lattner
dac58ad983 Make iostream #inclusion explicit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25514 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-22 23:32:06 +00:00
Misha Brukman
fd93908ae8 Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21427 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 23:48:37 +00:00
Jeff Cohen
f5e58f8f43 Put createLoopUnswitchPass() into proper namespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19306 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-06 05:47:18 +00:00
Alkis Evlogimenos
20aa474f8f Fixes to make LLVM compile with vc7.1. 
Patch contributed by Paolo Invernizzi!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16152 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-09-03 18:19:51 +00:00
Reid Spencer
551ccae044 Changes For Bug 352 
Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16137 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-09-01 22:55:40 +00:00
Chris Lattner
18f16094c2 Initial checkin of a simple loop unswitching pass. It still needs work, 
but it's a start, and seems to do it's basic job.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13068 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-19 18:07:02 +00:00