sched-deps.c (sched_macro_fuse_insns): Check return value of targetm.fixed_condition_code_regs.

        * sched-deps.c (sched_macro_fuse_insns): Check return value of
        targetm.fixed_condition_code_regs.

From-SVN: r270167

gcc/ChangeLog

+2019-04-05  Joern Rennecke  <joern.rennecke@embecosm.com>
+
+	* sched-deps.c (sched_macro_fuse_insns): Check return value of
+	targetm.fixed_condition_code_regs.
+
 2019-04-05  Richard Biener  <rguenther@suse.de>
 
 	PR debug/89892

gcc/sched-deps.c

@@ -2857,7 +2857,8 @@ sched_macro_fuse_insns (rtx_insn *insn)
     {
       unsigned int condreg1, condreg2;
       rtx cc_reg_1;
-      targetm.fixed_condition_code_regs (&condreg1, &condreg2);
+      if (targetm.fixed_condition_code_regs (&condreg1, &condreg2))
+	{
 	  cc_reg_1 = gen_rtx_REG (CCmode, condreg1);
 	  if (reg_referenced_p (cc_reg_1, PATTERN (insn))
 	      && modified_in_p (cc_reg_1, prev))
@@ -2867,6 +2868,7 @@ sched_macro_fuse_insns (rtx_insn *insn)
 	      return;
 	    }
 	}
+    }
 
   if (single_set (insn) && single_set (prev))
     {