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gimplify.c (gimplify_init_constructor): Do not create a temporary for a volatile LHS if... 

* gimplify.c (gimplify_init_constructor): Do not create a temporary for
	a volatile LHS if the constructor has only one element.

From-SVN: r163727
This commit is contained in:
Eric Botcazou 2010-09-01 12:15:08 +00:00
parent 6e0833db45
commit 558af7ca1c
2 changed files with 15 additions and 9 deletions
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17
gcc/ChangeLog
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@ -1,11 +1,16 @@
2010-09-01 Eric Botcazou <ebotcazou@adacore.com>
* gimplify.c (gimplify_init_constructor): Do not create a temporary for
a volatile LHS if the constructor has only one element.
2010-09-01 Mikael Pettersson <mikpe@it.uu.se>
PR bootstrap/45321
* tree.c (stdarg_p): Make fntype parameter const.
* tree.h (stdarg_p): Likewise.
(function_args_iterator): Remove unused fntype field.
(function_args_iter_init): Do not initialize fntype
field. Make fntype parameter const.
PR bootstrap/45321
* tree.c (stdarg_p): Make fntype parameter const.
* tree.h (stdarg_p): Likewise.
(function_args_iterator): Remove unused fntype field.
(function_args_iter_init): Do not initialize fntype
field. Make fntype parameter const.
2010-09-01 Richard Guenther <rguenther@suse.de>

7
gcc/gimplify.c
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@ -3824,11 +3824,12 @@ gimplify_init_constructor (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
}
}
/* If the target is volatile and we have non-zero elements
initialize the target from a temporary. */
/* If the target is volatile, we have non-zero elements and more than
one field to assign, initialize the target from a temporary. */
if (TREE_THIS_VOLATILE (object)
&& !TREE_ADDRESSABLE (type)
&& num_nonzero_elements > 0)
&& num_nonzero_elements > 0
&& VEC_length (constructor_elt, elts) > 1)
{
tree temp = create_tmp_var (TYPE_MAIN_VARIANT (type), NULL);
TREE_OPERAND (*expr_p, 0) = temp;