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(expand_expr, case COMPONENT_REF): If taking value from a CONSTRUCTOR,

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must mask/sign-extend if bitfield.
(expand_builtin, case BUILT_IN_LONGJMP): Pass type, not IDENTIFIER,
to send arg of RETURN_POPS_ARGS.

From-SVN: r13373
This commit is contained in:
Richard Kenner 1997-01-04 22:12:25 -05:00
parent ac01eace31
commit 86b5812c18
1 changed files with 44 additions and 4 deletions
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48
gcc/expr.c
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@ -5467,8 +5467,46 @@ expand_expr (exp, target, tmode, modifier)
for (elt = CONSTRUCTOR_ELTS (TREE_OPERAND (exp, 0)); elt;
elt = TREE_CHAIN (elt))
if (TREE_PURPOSE (elt) == TREE_OPERAND (exp, 1))
return expand_expr (TREE_VALUE (elt), target, tmode, modifier);
if (TREE_PURPOSE (elt) == TREE_OPERAND (exp, 1)
/* We can normally use the value of the field in the
CONSTRUCTOR. However, if this is a bitfield in
an integral mode that we can fit in a HOST_WIDE_INT,
we must mask only the number of bits in the bitfield,
since this is done implicitly by the constructor. If
the bitfield does not meet either of those conditions,
we can't do this optimization. */
&& (! DECL_BIT_FIELD (TREE_PURPOSE (elt))
|| ((GET_MODE_CLASS (DECL_MODE (TREE_PURPOSE (elt)))
== MODE_INT)
&& (GET_MODE_BITSIZE (DECL_MODE (TREE_PURPOSE (elt)))
<= HOST_BITS_PER_WIDE_INT))))
{
op0 = expand_expr (TREE_VALUE (elt), target, tmode, modifier);
if (DECL_BIT_FIELD (TREE_PURPOSE (elt)))
{
int bitsize = DECL_FIELD_SIZE (TREE_PURPOSE (elt));
enum machine_mode imode
= TYPE_MODE (TREE_TYPE (TREE_PURPOSE (elt)));
if (TREE_UNSIGNED (TREE_TYPE (TREE_PURPOSE (elt))))
{
op1 = GEN_INT (((HOST_WIDE_INT) 1 << bitsize) - 1);
op0 = expand_and (op0, op1, target);
}
else
{
tree count
= build_int_2 (imode - bitsize, 0);
op0 = expand_shift (LSHIFT_EXPR, imode, op0, count,
target, 0);
op0 = expand_shift (RSHIFT_EXPR, imode, op0, count,
target, 0);
}
}
return op0;
}
}
{
@ -8838,8 +8876,10 @@ expand_builtin (exp, target, subtarget, mode, ignore)
enum machine_mode sa_mode = Pmode;
rtx stack_save;
int old_inhibit_defer_pop = inhibit_defer_pop;
int return_pops = RETURN_POPS_ARGS (get_identifier ("__dummy"),
get_identifier ("__dummy"), 0);
int return_pops
= RETURN_POPS_ARGS (get_identifier ("__dummy"),
build_function_type (void_type_node, NULL_TREE),
0);
rtx next_arg_reg;
CUMULATIVE_ARGS args_so_far;
int i;