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72 Commits

Author SHA1 Message Date
Devang Patel f55b79fa71 Avoid triangle loops. 
llvm-svn: 41093
 2007-08-15 02:14:55 +00:00
Devang Patel 7cad917160 Avoid nested loops at the moment. 
llvm-svn: 41090
 2007-08-14 23:53:57 +00:00
Devang Patel 33ba97d747 Fix dominance frontier update while removing blocks. 
llvm-svn: 41082
 2007-08-14 18:35:57 +00:00
Devang Patel dbe8497d45 Handle last value assignments. 
llvm-svn: 41063
 2007-08-14 01:30:57 +00:00
Devang Patel f74ccbb4e8 StartValue is already calculated. 
llvm-svn: 41062
 2007-08-14 00:15:45 +00:00
Devang Patel 948653915f Preserve simple analysis. 
llvm-svn: 41054
 2007-08-13 22:22:13 +00:00
Devang Patel b8a41bb4f1 Preserve dominator info. 
llvm-svn: 41053
 2007-08-13 22:13:24 +00:00
Devang Patel f258578206 Split loops and do CFG cleanup. 
llvm-svn: 41029
 2007-08-12 07:02:51 +00:00
Reid Spencer 9f90f965de Remove unused variables. 
llvm-svn: 41028
 2007-08-12 04:45:36 +00:00
Devang Patel f417c2cc34 Clone loop. 
llvm-svn: 40998
 2007-08-10 18:07:13 +00:00
Devang Patel 9a4761464f Remove unncessary duplication. 
llvm-svn: 40979
 2007-08-10 00:59:03 +00:00
Devang Patel 7bdf4531bb Calculate exit and start value of true loop and false loop respectively. 
llvm-svn: 40978
 2007-08-10 00:53:35 +00:00
Devang Patel 67af6cd7ea ExitCondition and Induction variable are loop constraints 
not split condition constraints.

llvm-svn: 40977
 2007-08-10 00:33:50 +00:00
Devang Patel 42e3e5bec1 Traverse loop blocks' terminators to find split candidates. 
llvm-svn: 40960
 2007-08-09 01:39:01 +00:00
Devang Patel 0183c797c4 Add cost analysis. 
llvm-svn: 40952
 2007-08-08 22:25:28 +00:00
Devang Patel 0e34ee25ab Preserve dom info while processing one iteration loop. 
llvm-svn: 40947
 2007-08-08 21:39:47 +00:00
Devang Patel 8abc5c82b7 Clear split info. 
llvm-svn: 40944
 2007-08-08 21:18:27 +00:00
Devang Patel 593bf9ceb3 Handle multiple split conditions. 
llvm-svn: 40941
 2007-08-08 21:02:17 +00:00
Devang Patel 68de1ae816 Embrace patch review feedback. 
llvm-svn: 40915
 2007-08-08 01:51:27 +00:00
Devang Patel c7e53bdcfd Fix new compare instruction's signness. Caught by Chris during review. 
llvm-svn: 40912
 2007-08-07 23:17:52 +00:00
Devang Patel 19211b6528 Use eraseFromParent(). 
llvm-svn: 40903
 2007-08-07 17:45:35 +00:00
Devang Patel c70106cb30 Begin loop index split pass. 
llvm-svn: 40883
 2007-08-07 00:25:56 +00:00