[Bug rtl-optimization/49847] [4.7 Regression] NULL deref in fold_rtx (prev_insn_cc0 == NULL)

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49847

--- Comment #14 from Mikael Pettersson <mikpe at it dot uu.se> 2012-02-05 
21:56:47 UTC ---
(In reply to comment #10)
> In 4.7.  Ada is also affected.

Yeah, I got this same ICE in my latest attempt to natively bootstrap 4.7 with
Ada enabled and my patch for the Ada FP bug PR51483 applied.  Happened in
a-calfor.adb sometime in or after stage 3.