[Bug rtl-optimization/52876] [x32] - Sign extend 32 to 64bit then clear upper 32bits fails O1 or higher

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52876

--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> 2012-04-10 14:49:37 
UTC ---
A patch is posted at

http://gcc.gnu.org/ml/gcc-patches/2012-04/msg00320.html