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Author SHA1 Message Date
Andrew Trick db149f9e73 Remove redundant -enable-iv-rewrite=false flags from test cases. 
llvm-svn: 153255
 2012-03-22 17:09:04 +00:00
Andrew Trick 183013d8d4 Rename -disable-iv-rewrite to -enable-iv-rewrite=false in preparation for default change. 
llvm-svn: 139517
 2011-09-12 18:28:44 +00:00
Andrew Trick 7da2417c8a indvars: LinearFunctionTestReplace for non-canonical IVs. 
For -disable-iv-rewrite, perform LFTR without generating a new
"canonical" induction variable. Instead find the "best" existing
induction variable for use in the loop exit test and compute the final
value of that IV for use in the new loop exit test. In short,
convert to a simple eq/ne exit test as long as it's cheap to do so.

llvm-svn: 135420
 2011-07-18 20:32:31 +00:00