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15 Commits

Author SHA1 Message Date
Chris Lattner fe4151efe7 Reform the unswitching code in terms of edge splitting, not block splitting. 
llvm-svn: 26112
 2006-02-10 23:16:39 +00:00
Chris Lattner ec6b40a093 Fix a case where UnswitchTrivialCondition broke critical edges with 
phi's in the successors

llvm-svn: 26108
 2006-02-10 19:08:15 +00:00
Chris Lattner 6e263155a6 add some notes, move some code around. Implement unswitching of loops 
with branches on partially invariant computations.

llvm-svn: 26104
 2006-02-10 02:30:37 +00:00
Chris Lattner 4935417a84 Move code around to be more logical, no functionality change. 
llvm-svn: 26103
 2006-02-10 02:01:22 +00:00
Chris Lattner 3fc3148b85 When unswitching a trivial loop, do admit we are doing it! :) 
llvm-svn: 26102
 2006-02-10 01:36:35 +00:00
Chris Lattner ed7a67b0de 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.

llvm-svn: 26101
 2006-02-10 01:24:09 +00:00
Chris Lattner 4f0e66df6a Simplify control flow a bit, note that unswitch preserves canonical loop form 
llvm-svn: 26098
 2006-02-09 22:15:42 +00:00
Chris Lattner 8976219850 Make the threshold a parameter 
llvm-svn: 26093
 2006-02-09 20:15:48 +00:00
Chris Lattner 2826e0511b 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.

llvm-svn: 26089
 2006-02-09 19:14:52 +00:00
Chris Lattner c597b8a55e Make iostream #inclusion explicit 
llvm-svn: 25514
 2006-01-22 23:32:06 +00:00
Misha Brukman b1c9317bb4 Remove trailing whitespace 
llvm-svn: 21427
 2005-04-21 23:48:37 +00:00
Jeff Cohen eca0d0f2da Put createLoopUnswitchPass() into proper namespace 
llvm-svn: 19306
 2005-01-06 05:47:18 +00:00
Alkis Evlogimenos a5c04ee50f Fixes to make LLVM compile with vc7.1. 
Patch contributed by Paolo Invernizzi!

llvm-svn: 16152
 2004-09-03 18:19:51 +00:00
Reid Spencer 7c16caa336 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/.

llvm-svn: 16137
 2004-09-01 22:55:40 +00:00
Chris Lattner f48f777d4c 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.

llvm-svn: 13068
 2004-04-19 18:07:02 +00:00