re PR target/81613 (FAIL: gfortran.dg/intrinsic_modulo_1.f90 -O3 -g execution test)

PR target/81613
* config/m68k/m68k.md (moveq feeding equality comparison): Check
that the registers are different.

From-SVN: r252949

gcc/ChangeLog

+2017-09-18  Andreas Schwab  <schwab@linux-m68k.org>
+
+	PR target/81613
+	* config/m68k/m68k.md (moveq feeding equality comparison): Check
+	that the registers are different.
+
 2017-09-18  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (fold_builtin_cpu): Add M_AMDFAM17H

gcc/config/m68k/m68k.md

@@ -7728,7 +7728,8 @@
   "peep2_reg_dead_p (2, operands[0])
    && peep2_reg_dead_p (2, operands[2])
    && (operands[3] == pc_rtx || operands[4] == pc_rtx)
-   && DATA_REG_P (operands[2])"
+   && DATA_REG_P (operands[2])
+   && !rtx_equal_p (operands[0], operands[2])"
   [(set (match_dup 2) (plus:SI (match_dup 2) (match_dup 6)))
    (set (cc0) (compare (match_dup 2) (const_int 0)))
    (set (pc) (if_then_else (match_op_dup 5 [(cc0) (const_int 0)])