[Bug rtl-optimization/49936] [4.7 Regression] IRA handles CANNOT_CHANGE_MODE_CLASS poorly, + spills to memory on 4.7

[sandra at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49936

--- Comment #10 from Sandra Loosemore <sandra at codesourcery dot com> 
2012-01-05 17:31:39 UTC ---
My notes are that the unnecessary register moves in the loop have been present
since at least GCC 4.3, so it is not a 4.6->4.7 regression, at least.