* combine.c (try_combine): Handle a SEQUENCE of one insn.

From-SVN: r46177

gcc/ChangeLog

+2001-10-10  Richard Henderson  <rth@redhat.com>
+
+        * combine.c (try_combine): Handle a SEQUENCE of one insn.
+
+2001-10-10  Richard Henderson  <rth@redhat.com>
+
+	* langhooks.c: Include langhooks.h.
+	* Makefile.in (langhooks.o): Depend on it.
+
 Wed Oct 10 23:49:06 EDT 2001  John Wehle  (john@feith.com)
 
 	* rtlanal.c (noop_move_p): Insns with a REG_RETVAL note

gcc/combine.c

@@ -2132,6 +2132,12 @@ try_combine (i3, i2, i1, new_direct_jump_p)
 	    }
 	}
 
+      /* If we've split a jump pattern, we'll wind up with a sequence even
+	 with one instruction.  We can handle that below, so extract it.  */
+      if (m_split && GET_CODE (m_split) == SEQUENCE
+	  && XVECLEN (m_split, 0) == 1)
+	m_split = PATTERN (XVECEXP (m_split, 0, 0));
+
       if (m_split && GET_CODE (m_split) != SEQUENCE)
 	{
 	  insn_code_number = recog_for_combine (&m_split, i3, &new_i3_notes);