Allow arg_pointer_rtx/frame_pointer_rtx for based_loc_descr

gcc/

	PR debug/52857
	* dwarf2out.c (mem_loc_descriptor): Allow arg_pointer_rtx and
	frame_pointer_rtx for based_loc_descr.

gcc/testsuite/

	PR debug/52857
	* gcc.target/i386/pr52857-1.c: New.
	* gcc.target/i386/pr52857-2.c: Likewise.

From-SVN: r190647

gcc/ChangeLog

+2012-08-24  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR debug/52857
+	* dwarf2out.c (mem_loc_descriptor): Allow arg_pointer_rtx and
+	frame_pointer_rtx for based_loc_descr.
+
 2012-08-24  Martin Jambor  <mjambor@suse.cz>
 
 	* predict.c (maybe_hot_frequency_p): New parameter fun.  Use its decl

gcc/dwarf2out.c

@@ -11253,6 +11253,8 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
     case REG:
       if (GET_MODE_CLASS (mode) != MODE_INT
 	  || (GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE
+	      && rtl != arg_pointer_rtx
+	      && rtl != frame_pointer_rtx
 #ifdef POINTERS_EXTEND_UNSIGNED
 	      && (mode != Pmode || mem_mode == VOIDmode)
 #endif
@@ -11525,7 +11527,9 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode,
     case PLUS:
     plus:
       if (is_based_loc (rtl)
-	  && GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE
+	  && (GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE
+	      || XEXP (rtl, 0) == arg_pointer_rtx
+	      || XEXP (rtl, 0) == frame_pointer_rtx)
 	  && GET_MODE_CLASS (mode) == MODE_INT)
 	mem_loc_result = based_loc_descr (XEXP (rtl, 0),
 					  INTVAL (XEXP (rtl, 1)),

gcc/testsuite/ChangeLog

+2012-08-24  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR debug/52857
+	* gcc.target/i386/pr52857-1.c: New.
+	* gcc.target/i386/pr52857-2.c: Likewise.
+
 2012-08-23  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* gcc.target/mips/code-readable-4.c: New test.

gcc/testsuite/gcc.target/i386/pr52857-1.c

+/* { dg-do compile { target { ! { ia32 } } } } */
+/* { dg-options "-g -O -mx32 -maddress-mode=long" } */
+
+extern void get_BID128 (int *);
+void 
+__bid128_div (void)
+{
+  int res;
+  get_BID128 (&res);
+}

gcc/testsuite/gcc.target/i386/pr52857-2.c

+/* { dg-do compile { target { ! { ia32 } } } } */
+/* { dg-options "-g -O -mx32 -maddress-mode=long" } */
+
+void uw_init_context_1 (void *);
+void _Unwind_ForcedUnwind (void)
+{
+  uw_init_context_1 (__builtin_dwarf_cfa ());
+}