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108 Commits

Author SHA1 Message Date
Devang Patel 8eb8eeada9 Insert new pre-header before new header. Original pre-header may 
happen to be an entry, in such case, it is not a good idea to
insert new block before entry.

Also fix typo in assertion check.

llvm-svn: 35833
 2007-04-09 21:40:43 +00:00
Devang Patel 854197884b Preserve canonical loop form. 
llvm-svn: 35829
 2007-04-09 20:19:46 +00:00
Devang Patel b9af5747a5 Do not create new pre-header. Reuse original pre-header. 
llvm-svn: 35825
 2007-04-09 19:04:21 +00:00
Devang Patel 03d7ae3a74 Simpler for() loops. 
llvm-svn: 35822
 2007-04-09 17:09:13 +00:00
Devang Patel d6ba41e02d Fix future bug. Of course, Chris spotted this. 
Handle Argument or Undef as an incoming PHI value.

llvm-svn: 35821
 2007-04-09 16:41:46 +00:00
Devang Patel b28a391a8d More cosmetic changes. 
llvm-svn: 35820
 2007-04-09 16:21:29 +00:00
Devang Patel 88bc2c6f82 Only cosmetic changes. Zero functionality Change. 
llvm-svn: 35819
 2007-04-09 16:11:48 +00:00
Devang Patel f42389ffe5 Add loop rotation pass. 
llvm-svn: 35714
 2007-04-07 01:25:15 +00:00