[Bug rtl-optimization/49847] [4.7/4.8/4.9 Regression] NULL deref in fold_rtx (prev_insn_cc0 == NULL)

[schwab@linux-m68k.org]

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

--- Comment #29 from Andreas Schwab <schwab@linux-m68k.org> ---
In gcc <= 4.6 I'm unable to tell the compiler to consider the fp compare
trapping even with -ftrapping-math.