Chris Lattner
81be2e961b
Fix a case where UnswitchTrivialCondition broke critical edges with
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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
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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.
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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! :)
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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
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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
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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
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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
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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
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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
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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
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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.
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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
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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,
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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
