(output_epilog): Don't output a traceback table if

flag_inhibit_size_directive is set.

From-SVN: r6551

gcc/config/rs6000/rs6000.c

@@ -1583,7 +1583,17 @@ output_epilog (file, size)
     }
 
   /* Output a traceback table here.  See /usr/include/sys/debug.h for info
-     on its format.  */
+     on its format.
+
+     We don't output a traceback table if -finhibit-size-directive was
+     used.  The documentation for -finhibit-size-directive reads
+     ``don't output a @code{.size} assembler directive, or anything
+     else that would cause trouble if the function is split in the
+     middle, and the two halves are placed at locations far apart in
+     memory.''  The traceback table has this property, since it
+     includes the offset from the start of the function to the
+     traceback table itself.  */
+  if (! flag_inhibit_size_directive)
     {
       char *fname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
       int fixed_parms, float_parms, parm_info;
@@ -1597,23 +1607,25 @@ output_epilog (file, size)
       ASM_OUTPUT_LABEL (file, fname);
 
       /* The .tbtab pseudo-op can only be used for the first eight
-       expressions, since it can't handle the possibly variable length
-       fields that follow.  However, if you omit the optional fields,
-       the assembler outputs zeros for all optional fields anyways, giving each
-       variable length field is minimum length (as defined in sys/debug.h).
-       Thus we can not use the .tbtab pseudo-op at all.  */
-
-    /* An all-zero word flags the start of the tbtab, for debuggers that have
-       to find it by searching forward from the entry point or from the
-       current pc.  */
+	 expressions, since it can't handle the possibly variable
+	 length fields that follow.  However, if you omit the optional
+	 fields, the assembler outputs zeros for all optional fields
+	 anyways, giving each variable length field is minimum length
+	 (as defined in sys/debug.h).  Thus we can not use the .tbtab
+	 pseudo-op at all.  */
+
+      /* An all-zero word flags the start of the tbtab, for debuggers
+	 that have to find it by searching forward from the entry
+	 point or from the current pc.  */
       fprintf (file, "\t.long 0\n");
 
       /* Tbtab format type.  Use format type 0.  */
       fprintf (file, "\t.byte 0,");
 
-    /* Language type.  Unfortunately, there doesn't seem to be any official way
-       to get this info, so we use language_string.  C is 0.  C++ is 9.
-       No number defined for Obj-C, so use the value for C for now.  */
+      /* Language type.  Unfortunately, there doesn't seem to be any
+	 official way to get this info, so we use language_string.  C
+	 is 0.  C++ is 9.  No number defined for Obj-C, so use the
+	 value for C for now.  */
       if (! strcmp (language_string, "GNU C")
 	  || ! strcmp (language_string, "GNU Obj-C"))
 	i = 0;
@@ -1637,9 +1649,10 @@ output_epilog (file, size)
       /* Assume that fp operations are used if any fp reg must be saved.  */
       fprintf (file, "%d,", (1 << 5) | ((first_fp_reg != 64) << 1));
 
-    /* 6 bitfields: function is interrupt handler, name present in proc table,
-       function calls alloca, on condition directives (controls stack walks,
-       3 bits), saves condition reg, saves link reg.  */
+      /* 6 bitfields: function is interrupt handler, name present in
+	 proc table, function calls alloca, on condition directives
+	 (controls stack walks, 3 bits), saves condition reg, saves
+	 link reg.  */
       /* The `function calls alloca' bit seems to be set whenever reg 31 is
 	 set up as a frame pointer, even when there is no alloca call.  */
       fprintf (file, "%d,",
@@ -1655,7 +1668,8 @@ output_epilog (file, size)
       fprintf (file, "%d,", (32 - first_reg_to_save ()));
 
       {
-      /* Compute the parameter info from the function decl argument list.  */
+	/* Compute the parameter info from the function decl argument
+	   list.  */
 	tree decl;
 	int next_parm_info_bit;
 
@@ -1692,7 +1706,8 @@ output_epilog (file, size)
 		  }
 		else
 		  {
-		  fixed_parms += ((GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1))
+		    fixed_parms += ((GET_MODE_SIZE (mode)
+				     + (UNITS_PER_WORD - 1))
 				    / UNITS_PER_WORD);
 		    next_parm_info_bit -= 1;
 		  }
@@ -1735,7 +1750,8 @@ output_epilog (file, size)
       fprintf (file, "\n");
 
       /* Interrupt handler mask.  */
-    /* Omit this long, since we never set the interrupt handler bit above.  */
+      /* Omit this long, since we never set the interrupt handler bit
+	 above.  */
 
       /* Number of CTL (controlled storage) anchors.  */
       /* Omit this long, since the has_ctl bit is never set above.  */