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re PR debug/23806 (-gstabs with VLAs does not work)

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PR debug/23806
        * dbxout.c (dbxout_expand_expr): New.
        (dbxout_symbol): Use it.

From-SVN: r104129
This commit is contained in:
Richard Henderson 2005-09-10 14:10:42 -07:00 committed by Richard Henderson
parent ca0d06ac97
commit 4e0e2698b0
2 changed files with 64 additions and 11 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2005-09-10 Richard Henderson <rth@redhat.com>
PR debug/23806
* dbxout.c (dbxout_expand_expr): New.
(dbxout_symbol): Use it.
2005-09-10 Richard Earnshaw <richard.earnshaw@arm.com>
* arm.c (arm_gen_rotated_half_load): Delete.

69
gcc/dbxout.c
View File

@ -2324,6 +2324,63 @@ dbxout_class_name_qualifiers (tree decl)
}
}
/* This is a specialized subset of expand_expr for use by dbxout_symbol in
evaluating DECL_VALUE_EXPR. In particular, we stop if we find decls that
havn't been expanded, or if the expression is getting so complex we won't
be able to represent it in stabs anyway. Returns NULL on failure. */
static rtx
dbxout_expand_expr (tree expr)
{
switch (TREE_CODE (expr))
{
case VAR_DECL:
case PARM_DECL:
if (DECL_HAS_VALUE_EXPR_P (expr))
return dbxout_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 = dbxout_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;
}
}
/* Output a .stabs for the symbol defined by DECL,
which must be a ..._DECL node in the normal namespace.
It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
@ -2608,23 +2665,13 @@ dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED)
gcc_unreachable ();
case RESULT_DECL:
/* Named return value, treat like a VAR_DECL. */
decl_rtl = DECL_RTL_IF_SET (decl);
goto do_var_decl;
case VAR_DECL:
/* Don't mention a variable that is external.
Let the file that defines it describe it. */
if (DECL_EXTERNAL (decl))
break;
if (DECL_HAS_VALUE_EXPR_P (decl))
decl_rtl = expand_expr (DECL_VALUE_EXPR (decl), NULL_RTX, VOIDmode,
EXPAND_INITIALIZER);
else
decl_rtl = DECL_RTL_IF_SET (decl);
do_var_decl:
decl_rtl = dbxout_expand_expr (decl);
if (!decl_rtl)
DBXOUT_DECR_NESTING_AND_RETURN (0);