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riscv-gcc-1
Commit 1448093c by Tristan Gingold Committed by Eric Botcazou
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tree.h (CONSTRUCTOR_NO_CLEARING): Define. 

	* tree.h (CONSTRUCTOR_NO_CLEARING): Define.
	* tree-core.h (CONSTRUCTOR_NO_CLEARING): Document it.
	* tree.def (CONSTRUCTOR): Likewise.
	* doc/generic.texi (CONSTRUCTOR): Likewise.  Update description.
	* gimplify.c (gimplify_init_constructor): Do not clear the object when
	the constructor is incomplete and CONSTRUCTOR_NO_CLEARING is set.
ada/
	* gcc-interface/utils2.c (gnat_build_constructor): Also set the flag
	CONSTRUCTOR_NO_CLEARING on the constructor.

From-SVN: r204677
parent 7008512d
Showing with 51 additions and 25 deletions
gcc/ChangeLog
2013-11-11 Tristan Gingold <gingold@adacore.com>
Eric Botcazou <ebotcazou@adacore.com>
* tree.h (CONSTRUCTOR_NO_CLEARING): Define.
* tree-core.h (CONSTRUCTOR_NO_CLEARING): Document it.
* tree.def (CONSTRUCTOR): Likewise.
* doc/generic.texi (CONSTRUCTOR): Likewise. Update description.
* gimplify.c (gimplify_init_constructor): Do not clear the object when
the constructor is incomplete and CONSTRUCTOR_NO_CLEARING is set.
2013-11-11 Basile Starynkevitch <basile@starynkevitch.net>
* toplev.c (toplev_main): Move PLUGIN_FINISH invocation before
diagnostic_finish.
* toplev.c (toplev_main): Move PLUGIN_FINISH invocation before
diagnostic_finish.
2013-11-11 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
gcc/ada/ChangeLog
2013-11-11 Tristan Gingold <gingold@adacore.com>
Eric Botcazou <ebotcazou@adacore.com>
* gcc-interface/utils2.c (gnat_build_constructor): Also set the flag
CONSTRUCTOR_NO_CLEARING on the constructor.
2013-10-30 Sharad Singhai <singhai@google.com>
* gnat_ugn.texi: Remove option description for PR middle-end/58134.
......
gcc/ada/gcc-interface/utils2.c
......@@ -1874,6 +1874,7 @@ gnat_build_constructor (tree type, vec<constructor_elt, va_gc> *v)
v->qsort (compare_elmt_bitpos);
result = build_constructor (type, v);
CONSTRUCTOR_NO_CLEARING (result) = 1;
TREE_CONSTANT (result) = TREE_STATIC (result) = allconstant;
TREE_SIDE_EFFECTS (result) = side_effects;
TREE_READONLY (result) = TYPE_READONLY (type) || allconstant;
......
gcc/doc/generic.texi
......@@ -1616,29 +1616,31 @@ of temporaries during the evaluation of that expression should be
performed immediately after the expression is evaluated.
@item CONSTRUCTOR
These nodes represent the brace-enclosed initializers for a structure or
array. The first operand is reserved for use by the back end. The
second operand is a @code{TREE_LIST}. If the @code{TREE_TYPE} of the
@code{CONSTRUCTOR} is a @code{RECORD_TYPE} or @code{UNION_TYPE}, then
the @code{TREE_PURPOSE} of each node in the @code{TREE_LIST} will be a
@code{FIELD_DECL} and the @code{TREE_VALUE} of each node will be the
expression used to initialize that field.
If the @code{TREE_TYPE} of the @code{CONSTRUCTOR} is an
@code{ARRAY_TYPE}, then the @code{TREE_PURPOSE} of each element in the
@code{TREE_LIST} will be an @code{INTEGER_CST} or a @code{RANGE_EXPR} of
two @code{INTEGER_CST}s. A single @code{INTEGER_CST} indicates which
element of the array (indexed from zero) is being assigned to. A
@code{RANGE_EXPR} indicates an inclusive range of elements to
initialize. In both cases the @code{TREE_VALUE} is the corresponding
These nodes represent the brace-enclosed initializers for a structure or an
array. They contain a sequence of component values made out of a vector of
constructor_elt, which is a (@code{INDEX}, @code{VALUE}) pair.
If the @code{TREE_TYPE} of the @code{CONSTRUCTOR} is a @code{RECORD_TYPE},
@code{UNION_TYPE} or @code{QUAL_UNION_TYPE} then the @code{INDEX} of each
node in the sequence will be a @code{FIELD_DECL} and the @code{VALUE} will
be the expression used to initialize that field.
If the @code{TREE_TYPE} of the @code{CONSTRUCTOR} is an @code{ARRAY_TYPE},
then the @code{INDEX} of each node in the sequence will be an
@code{INTEGER_CST} or a @code{RANGE_EXPR} of two @code{INTEGER_CST}s.
A single @code{INTEGER_CST} indicates which element of the array is being
assigned to. A @code{RANGE_EXPR} indicates an inclusive range of elements
to initialize. In both cases the @code{VALUE} is the corresponding
initializer. It is re-evaluated for each element of a
@code{RANGE_EXPR}. If the @code{TREE_PURPOSE} is @code{NULL_TREE}, then
@code{RANGE_EXPR}. If the @code{INDEX} is @code{NULL_TREE}, then
the initializer is for the next available array element.
In the front end, you should not depend on the fields appearing in any
particular order. However, in the middle end, fields must appear in
declaration order. You should not assume that all fields will be
represented. Unrepresented fields will be set to zero.
represented. Unrepresented fields will be cleared (zeroed), unless the
CONSTRUCTOR_NO_CLEARING flag is set, in which case their value becomes
undefined.
@item COMPOUND_LITERAL_EXPR
@findex COMPOUND_LITERAL_EXPR_DECL_EXPR
......
gcc/tree-core.h
......@@ -831,6 +831,9 @@ struct GTY(()) tree_base {
VAR_DECL, FUNCTION_DECL
IDENTIFIER_NODE
CONSTRUCTOR_NO_CLEARING in
CONSTRUCTOR
ASM_VOLATILE_P in
ASM_EXPR
......
gcc/tree.def
......@@ -445,10 +445,12 @@ DEFTREECODE (INDIRECT_REF, "indirect_ref", tcc_reference, 1)
OBJ_TYPE_REF_TOKEN: An integer index to the virtual method table. */
DEFTREECODE (OBJ_TYPE_REF, "obj_type_ref", tcc_expression, 3)
/* Constructor: return an aggregate value made from specified components.
In C, this is used only for structure and array initializers.
The operand is a sequence of component values made out of a VEC of
struct constructor_elt.
/* Used to represent the brace-enclosed initializers for a structure or an
array. It contains a sequence of component values made out of a VEC of
constructor_elt.
For RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE:
The field INDEX of each constructor_elt is a FIELD_DECL.
For ARRAY_TYPE:
The field INDEX of each constructor_elt is the corresponding index.
......@@ -457,8 +459,9 @@ DEFTREECODE (OBJ_TYPE_REF, "obj_type_ref", tcc_expression, 3)
has side-effects, they are evaluated once for each element. Wrap the
value in a SAVE_EXPR if you want to evaluate side effects only once.)
For RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE:
The field INDEX of each node is a FIELD_DECL. */
Components that aren't present are cleared as per the C semantics,
unless the CONSTRUCTOR_NO_CLEARING flag is set, in which case their
value becomes undefined. */
DEFTREECODE (CONSTRUCTOR, "constructor", tcc_exceptional, 0)
/* The expression types are mostly straightforward, with the fourth argument
......
gcc/tree.h
......@@ -957,6 +957,8 @@ extern void omp_clause_range_check_failed (const_tree, const char *, int,
(&(*CONSTRUCTOR_ELTS (NODE))[IDX])
#define CONSTRUCTOR_NELTS(NODE) \
(vec_safe_length (CONSTRUCTOR_ELTS (NODE)))
#define CONSTRUCTOR_NO_CLEARING(NODE) \
(CONSTRUCTOR_CHECK (NODE)->base.public_flag)
/* Iterate through the vector V of CONSTRUCTOR_ELT elements, yielding the
value of each element (stored within VAL). IX must be a scratch variable
......
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