varasm.c (function_section): If DECL is NULL_TREE, don't try to do anything else.

	* varasm.c (function_section): If DECL is NULL_TREE, don't try
	to do anything else.  Do not call get_insns if cfun or
	cfun->emit are NULL.

From-SVN: r89777

gcc/ChangeLog

+2004-10-28  Zack Weinberg  <zack@codesourcery.com>
+
+	* varasm.c (function_section): If DECL is NULL_TREE, don't try
+	to do anything else.  Do not call get_insns if cfun or
+	cfun->emit are NULL.
+
 2004-10-28  Adam Nemet  <anemet@lnxw.com>
 
 	PR middle-end/18160

gcc/varasm.c

@@ -563,26 +563,34 @@ asm_output_aligned_bss (FILE *file, tree decl ATTRIBUTE_UNUSED,
 
 /* Switch to the section for function DECL.
 
-   If DECL is NULL_TREE, switch to the text section.
-   ??? It's not clear that we will ever be passed NULL_TREE, but it's
-   safer to handle it.  */
+   If DECL is NULL_TREE, switch to the text section.  We can be passed
+   NULL_TREE under some circumstances by dbxout.c at least.  */
 
 void
 function_section (tree decl)
 {
-#ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
-  bool unlikely = scan_ahead_for_unlikely_executed_note (get_insns());
+  if (decl == NULL_TREE)
+    text_section ();
+  else
+    {
+      /* ??? Typical use of this function maybe shouldn't be looking
+	 for unlikely blocks at all - in the event that an entire
+	 function is going into the unlikely-execute section, that
+	 should be reflected in its DECL_SECTION_NAME.  */
+      rtx insns = cfun && cfun->emit ? get_insns () : 0;
+      bool unlikely = insns && scan_ahead_for_unlikely_executed_note (insns);
 
+#ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
       targetm.asm_out.select_section (decl, unlikely, DECL_ALIGN (decl));
 #else
-  if (scan_ahead_for_unlikely_executed_note (get_insns()))
+      if (unlikely)
 	unlikely_text_section ();
-  else if (decl != NULL_TREE
-	   && DECL_SECTION_NAME (decl) != NULL_TREE)
-    named_section (decl, (char *) 0, 0);
+      else if (DECL_SECTION_NAME (decl))
+	named_section (decl, 0, 0);
       else
 	text_section ();
 #endif
+    }
 }
 
 /* Switch to read-only data section associated with function DECL.  */