[Bug rtl-optimization/52883] ICE in simplify_const_unary_operation, at simplify-rtx.c:1464

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52883

--- Comment #2 from Uros Bizjak <ubizjak at gmail dot com> 2012-04-06 09:26:33 
UTC ---
Uncovered by 4.8 change to allow immediate operands in *zero_extendsidi2_rex64:

(define_insn "*zero_extendsidi2_rex64"
  [(set (match_operand:DI 0 "nonimmediate_operand"
            "=r ,o,?*Ym,?*y,?*Yi,!*x")
    (zero_extend:DI
     (match_operand:SI 1 "x86_64_zext_general_operand"
                "rmZ,0,r   ,m  ,r   ,m*x")))]
  "TARGET_64BIT"
  "@
   mov{l}\t{%1, %k0|%k0, %1}
   #
  ...)