sh.md (divsi_inv_m3): Handle zero dividend specially.

	* config/sh/sh.md (divsi_inv_m3): Handle zero dividend
	specially.

From-SVN: r130357

gcc/ChangeLog

+2007-11-22  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	* config/sh/sh.md (divsi_inv_m3): Handle zero dividend
+	specially.
+
 2007-11-22  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.h (TARGET_CPU_CPP_BUILTINS): Change checking

gcc/config/sh/sh.md

@@ -2471,6 +2471,12 @@ norm32: r25
   rtx scratch1 = operands[8];
   rtx scratch2 = operands[9];
 
+  if (satisfies_constraint_N (dividend))
+    {
+      emit_move_insn (result, dividend);
+      DONE;
+    }
+
   emit_insn (gen_mulsidi3_media (scratch0, inv1, dividend));
   emit_insn (gen_mulsidi3_media (scratch1, inv2, dividend));
   emit_insn (gen_ashrdi3_media (scratch2, scratch0, GEN_INT (63)));