+2010-07-01 Jakub Jelinek <jakub@redhat.com>
+
+ PR debug/44694
+ * dwarf2out.c (reg_loc_descriptor): For eliminated arg_pointer_rtx
+ or frame_pointer_rtx use DW_OP_fbreg offset DW_OP_stack_value.
+
2010-07-01 Richard Guenther <rguenther@suse.de>
* emit-rtl.c (set_mem_attributes_minus_bitpos): Use unsigned
if (REGNO (rtl) >= FIRST_PSEUDO_REGISTER)
return 0;
+ /* We only use "frame base" when we're sure we're talking about the
+ post-prologue local stack frame. We do this by *not* running
+ register elimination until this point, and recognizing the special
+ argument pointer and soft frame pointer rtx's.
+ Use DW_OP_fbreg offset DW_OP_stack_value in this case. */
+ if ((rtl == arg_pointer_rtx || rtl == frame_pointer_rtx)
+ && eliminate_regs (rtl, VOIDmode, NULL_RTX) != rtl)
+ {
+ dw_loc_descr_ref result = NULL;
+
+ if (dwarf_version >= 4 || !dwarf_strict)
+ {
+ result = mem_loc_descriptor (rtl, VOIDmode, initialized);
+ if (result)
+ add_loc_descr (&result,
+ new_loc_descr (DW_OP_stack_value, 0, 0));
+ }
+ return result;
+ }
+
regs = targetm.dwarf_register_span (rtl);
if (hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)] > 1 || regs)