[Bug target/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

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |UNCONFIRMED
          Component|rtl-optimization            |target
     Ever Confirmed|1                           |0

--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> 2012-04-05 15:21:15 
UTC ---
The problem starts with

(insn 6 3 7 2 (set (reg/f:DI 64 [ addr ])
        (sign_extend:DI (subreg/u:SI (reg/v/f:DI 63 [ addr ]) 0))) x.i:6 122
{*e
xtendsidi2_rex64}
     (nil))

Reg 64 shouldn't be frame related after sign-extension.