return rtl;
}
-/* This is a specialized subset of expand_expr to evaluate a DECL_VALUE_EXPR.
- We stop if we find decls that haven't been expanded, or if the expression is
- getting so complex we won't be able to represent it anyway. Returns NULL on
- failure. */
-
-static rtx
-dw_expand_expr (tree expr)
-{
- switch (TREE_CODE (expr))
- {
- case VAR_DECL:
- case PARM_DECL:
- if (DECL_HAS_VALUE_EXPR_P (expr))
- return dw_expand_expr (DECL_VALUE_EXPR (expr));
- /* FALLTHRU */
-
- case CONST_DECL:
- case RESULT_DECL:
- return DECL_RTL_IF_SET (expr);
-
- case INTEGER_CST:
- return expand_expr (expr, NULL_RTX, VOIDmode, EXPAND_INITIALIZER);
-
- case COMPONENT_REF:
- case ARRAY_REF:
- case ARRAY_RANGE_REF:
- case BIT_FIELD_REF:
- {
- enum machine_mode mode;
- HOST_WIDE_INT bitsize, bitpos;
- tree offset, tem;
- int volatilep = 0, unsignedp = 0;
- rtx x;
-
- tem = get_inner_reference (expr, &bitsize, &bitpos, &offset,
- &mode, &unsignedp, &volatilep, true);
-
- x = dw_expand_expr (tem);
- if (x == NULL || !MEM_P (x))
- return NULL;
- if (offset != NULL)
- {
- if (!host_integerp (offset, 0))
- return NULL;
- x = adjust_address_nv (x, mode, tree_low_cst (offset, 0));
- }
- if (bitpos != 0)
- x = adjust_address_nv (x, mode, bitpos / BITS_PER_UNIT);
-
- return x;
- }
-
- default:
- return NULL;
- }
-}
-
/* Generate RTL for the variable DECL to represent its location. */
static rtx
If so, the rtx for the SYMBOL_REF for the COMMON block is returned, and the
value is the offset into the common block for the symbol. */
-static rtx
-common_check (tree decl, HOST_WIDE_INT *value)
+static tree
+fortran_common (tree decl, HOST_WIDE_INT *value)
{
- rtx home;
- rtx sym_addr;
- rtx res = NULL_RTX;
-
+ tree val_expr, cvar;
+ enum machine_mode mode;
+ HOST_WIDE_INT bitsize, bitpos;
+ tree offset;
+ int volatilep = 0, unsignedp = 0;
+
/* If the decl isn't a VAR_DECL, or if it isn't public or static, or if
it does not have a value (the offset into the common area), or if it
is thread local (as opposed to global) then it isn't common, and shouldn't
be handled as such. */
if (TREE_CODE (decl) != VAR_DECL
- || !TREE_PUBLIC(decl)
- || !TREE_STATIC(decl)
- || !DECL_HAS_VALUE_EXPR_P(decl)
- || DECL_THREAD_LOCAL_P (decl)
- || !is_fortran())
- return NULL;
-
- home = DECL_RTL (decl);
- if (home == NULL_RTX || GET_CODE (home) != MEM)
- return NULL;
-
- sym_addr = dw_expand_expr (DECL_VALUE_EXPR (decl));
- if (sym_addr == NULL_RTX || GET_CODE (sym_addr) != MEM)
- return NULL;
+ || !TREE_PUBLIC (decl)
+ || !TREE_STATIC (decl)
+ || !DECL_HAS_VALUE_EXPR_P (decl)
+ || !is_fortran ())
+ return NULL_TREE;
- sym_addr = XEXP (sym_addr, 0);
- if (GET_CODE (sym_addr) == CONST)
- sym_addr = XEXP (sym_addr, 0);
- if ((GET_CODE (sym_addr) == SYMBOL_REF || GET_CODE (sym_addr) == PLUS)
- && DECL_INITIAL (decl) == 0)
- {
-
- /* We have a sym that will go into a common area, meaning that it
- will get storage reserved with a .comm/.lcomm assembler pseudo-op.
+ val_expr = DECL_VALUE_EXPR (decl);
+ if (TREE_CODE (val_expr) != COMPONENT_REF)
+ return NULL_TREE;
- Determine name of common area this symbol will be an offset into,
- and offset into that area. Also retrieve the decl for the area
- that the symbol is offset into. */
- tree cdecl = NULL;
+ cvar = get_inner_reference (val_expr, &bitsize, &bitpos, &offset,
+ &mode, &unsignedp, &volatilep, true);
- switch (GET_CODE (sym_addr))
- {
- case PLUS:
- if (GET_CODE (XEXP (sym_addr, 0)) == CONST_INT)
- {
- res = XEXP (sym_addr, 1);
- *value = INTVAL (XEXP (sym_addr, 0));
- cdecl = SYMBOL_REF_DECL (XEXP (sym_addr, 1));
- }
- else
- {
- res = XEXP (sym_addr, 0);
- *value = INTVAL (XEXP (sym_addr, 1));
- cdecl = SYMBOL_REF_DECL (XEXP (sym_addr, 0));
- }
- break;
-
- case SYMBOL_REF:
- res = sym_addr;
- *value = 0;
- cdecl = SYMBOL_REF_DECL (sym_addr);
- break;
-
- default:
- error ("common symbol debug info is not structured as "
- "symbol+offset");
- }
+ if (cvar == NULL_TREE
+ || TREE_CODE (cvar) != VAR_DECL
+ || DECL_ARTIFICIAL (cvar)
+ || !TREE_PUBLIC (cvar))
+ return NULL_TREE;
- /* Check area common symbol is offset into. If this is not public, then
- it is not a symbol in a common block. It must be a .lcomm symbol, not
- a .comm symbol. */
- if (cdecl == NULL || !TREE_PUBLIC(cdecl))
- res = NULL_RTX;
+ *value = 0;
+ if (offset != NULL)
+ {
+ if (!host_integerp (offset, 0))
+ return NULL_TREE;
+ *value = tree_low_cst (offset, 0);
}
- else
- res = NULL_RTX;
+ if (bitpos != 0)
+ *value += bitpos / BITS_PER_UNIT;
- return res;
+ return cvar;
}
gen_variable_die (tree decl, dw_die_ref context_die)
{
HOST_WIDE_INT off;
- rtx csym;
+ tree com_decl;
dw_die_ref var_die;
tree origin = decl_ultimate_origin (decl);
dw_die_ref old_die = lookup_decl_die (decl);
&& DECL_COMDAT (decl) && !TREE_ASM_WRITTEN (decl))
|| class_or_namespace_scope_p (context_die));
- csym = common_check (decl, &off);
+ com_decl = fortran_common (decl, &off);
/* Symbol in common gets emitted as a child of the common block, in the form
of a data member.
??? This creates a new common block die for every common block symbol.
Better to share same common block die for all symbols in that block. */
- if (csym)
+ if (com_decl)
{
- tree blok;
+ tree field;
dw_die_ref com_die;
- const char *cnam = targetm.strip_name_encoding(XSTR (csym, 0));
- dw_loc_descr_ref loc = mem_loc_descriptor (csym, dw_val_class_addr,
- VAR_INIT_STATUS_INITIALIZED);
+ const char *cnam = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (com_decl));
+ dw_loc_descr_ref loc = loc_descriptor_from_tree (com_decl);
- blok = (tree) TREE_OPERAND (DECL_VALUE_EXPR (decl), 0);
+ field = TREE_OPERAND (DECL_VALUE_EXPR (decl), 0);
var_die = new_die (DW_TAG_common_block, context_die, decl);
- add_name_and_src_coords_attributes (var_die, blok);
+ add_name_and_src_coords_attributes (var_die, field);
add_AT_flag (var_die, DW_AT_external, 1);
add_AT_loc (var_die, DW_AT_location, loc);
com_die = new_die (DW_TAG_member, var_die, decl);
add_name_and_src_coords_attributes (com_die, decl);
add_type_attribute (com_die, TREE_TYPE (decl), TREE_READONLY (decl),
- TREE_THIS_VOLATILE (decl), context_die);
- add_AT_loc (com_die, DW_AT_data_member_location, int_loc_descriptor(off));
+ TREE_THIS_VOLATILE (decl), context_die);
+ add_AT_loc (com_die, DW_AT_data_member_location,
+ int_loc_descriptor (off));
add_pubname_string (cnam, var_die); /* ??? needed? */
return;
}
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