re PR middle-end/18730 (cppexp.c:1076: error: unrecognizable insn)

	PR middle-end/18730
	* emit-rtl.c (get_first_nonnote_insn, get_last_nonnote_insn): When
	the first/last insn is a sequence, return the first/last insn of the
	sequence.

From-SVN: r91742

gcc/ChangeLog

 2004-12-04  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
+	PR middle-end/18730
+	* emit-rtl.c (get_first_nonnote_insn, get_last_nonnote_insn): When
+	the first/last insn is a sequence, return the first/last insn of the
+	sequence.
+
 	PR bootstrap/18804
 	* mklibgcc.in (vis_hide): Use implementation instead of declaration
 	for test function.

gcc/emit-rtl.c

@@ -2712,9 +2712,23 @@ get_last_insn_anywhere (void)
 rtx
 get_first_nonnote_insn (void)
 {
-  rtx insn;
+  rtx insn = first_insn;
+
+  if (insn)
+    {
+      if (NOTE_P (insn))
+	for (insn = next_insn (insn);
+	     insn && NOTE_P (insn);
+	     insn = next_insn (insn))
+	  continue;
+      else
+	{
+	  if (GET_CODE (insn) == INSN
+	      && GET_CODE (PATTERN (insn)) == SEQUENCE)
+	    insn = XVECEXP (PATTERN (insn), 0, 0);
+	}
+    }
 
-  for (insn = first_insn; insn && NOTE_P (insn); insn = next_insn (insn));
   return insn;
 }
 
@@ -2724,9 +2738,24 @@ get_first_nonnote_insn (void)
 rtx
 get_last_nonnote_insn (void)
 {
-  rtx insn;
+  rtx insn = last_insn;
+
+  if (insn)
+    {
+      if (NOTE_P (insn))
+	for (insn = previous_insn (insn);
+	     insn && NOTE_P (insn);
+	     insn = previous_insn (insn))
+	  continue;
+      else
+	{
+	  if (GET_CODE (insn) == INSN
+	      && GET_CODE (PATTERN (insn)) == SEQUENCE)
+	    insn = XVECEXP (PATTERN (insn), 0,
+			    XVECLEN (PATTERN (insn), 0) - 1);
+	}
+    }
 
-  for (insn = last_insn; insn && NOTE_P (insn); insn = previous_insn (insn));
   return insn;
 }