Comment 6 for bug 1295738

There is difference in machine descritptions writtem for *ior_scc_scc pattern.

GCC 4.8 branch, *ior_scc_scc pattern is

(define_insn_and_split "*ior_scc_scc"
  [(set (match_operand:SI 0 "s_register_operand" "=r")
        (ior:SI (match_operator:SI 3 "arm_comparison_operator"
                 [(match_operand:SI 1 "s_register_operand" "r")
                  (match_operand:SI 2 "arm_add_operand" "rIL")])
                (match_operator:SI 6 "arm_comparison_operator"
                 [(match_operand:SI 4 "s_register_operand" "r")
                  (match_operand:SI 5 "arm_add_operand" "rIL")])))
   (clobber (reg:CC CC_REGNUM))]

In GCC 4.9 tunk

(define_insn_and_split "*ior_scc_scc"
  [(set (match_operand:SI 0 "s_register_operand" "=Ts")
        (ior:SI (match_operator:SI 3 "arm_comparison_operator"
                 [(match_operand:SI 1 "s_register_operand" "r")
                  (match_operand:SI 2 "arm_add_operand" "rIL")])
                (match_operator:SI 6 "arm_comparison_operator"
                 [(match_operand:SI 4 "s_register_operand" "r")
                  (match_operand:SI 5 "arm_add_operand" "rIL")])))
   (clobber (reg:CC CC_REGNUM))]

Which defines a new constarint "Ts"and gives it general register set when "it" support is not restriccted

(define_register_constraint "Ts" "(arm_restrict_it) ? LO_REGS : GENERAL_REGS"
 "For arm_restrict_it the core registers @code{r0}-@code{r7}. GENERAL_REGS otherwise."

This is the only difference in machinde descriptions. But this does not fixes the bug. I still count on LRA is able to satisfy the constraint while reload still fails even in trunk.