Fix finding reg-sets of call insn

2014-06-20  Tom de Vries  <tom@codesourcery.com>

	* final.c (collect_fn_hard_reg_usage): Add separate IOR_HARD_REG_SET for
	get_call_reg_set_usage.

From-SVN: r211841

gcc/ChangeLog

 2014-06-20  Tom de Vries  <tom@codesourcery.com>
 
+	* final.c (collect_fn_hard_reg_usage): Add separate IOR_HARD_REG_SET for
+	get_call_reg_set_usage.
+
+2014-06-20  Tom de Vries  <tom@codesourcery.com>
+
 	* final.c (collect_fn_hard_reg_usage): Don't save function_used_regs if
 	it contains all call_used_regs.
 

gcc/final.c

@@ -4775,12 +4775,16 @@ collect_fn_hard_reg_usage (void)
       if (!NONDEBUG_INSN_P (insn))
 	continue;
 
-      find_all_hard_reg_sets (insn, &insn_used_regs, false);
+      if (CALL_P (insn))
+	{
+	  if (!get_call_reg_set_usage (insn, &insn_used_regs,
+				       call_used_reg_set))
+	    return;
 
-      if (CALL_P (insn)
-	  && !get_call_reg_set_usage (insn, &insn_used_regs, call_used_reg_set))
-	return;
+	  IOR_HARD_REG_SET (function_used_regs, insn_used_regs);
+	}
 
+      find_all_hard_reg_sets (insn, &insn_used_regs, false);
       IOR_HARD_REG_SET (function_used_regs, insn_used_regs);
     }