void
release_ssa_name_fn (struct function *fn, tree var)
{
if (!var)
return;
/* Never release the default definition for a symbol. It's a
special SSA name that should always exist once it's created. */
if (SSA_NAME_IS_DEFAULT_DEF (var))
return;
/* If VAR has been registered for SSA updating, don't remove it.
After update_ssa has run, the name will be released. */
if (name_registered_for_update_p (var))
{
release_ssa_name_after_update_ssa (var);
return;
}
/* release_ssa_name can be called multiple times on a single SSA_NAME.
However, it should only end up on our free list one time. We
keep a status bit in the SSA_NAME node itself to indicate it has
been put on the free list.
Note that once on the freelist you can not reference the SSA_NAME's
defining statement. */
if (! SSA_NAME_IN_FREE_LIST (var))
{
tree saved_ssa_name_var = SSA_NAME_VAR (var);
int saved_ssa_name_version = SSA_NAME_VERSION (var);
use_operand_p imm = &(SSA_NAME_IMM_USE_NODE (var));
if (MAY_HAVE_DEBUG_STMTS)
insert_debug_temp_for_var_def (NULL, var);
#ifdef ENABLE_CHECKING
verify_imm_links (stderr, var);
#endif
while (imm->next != imm)
delink_imm_use (imm->next);
(*SSANAMES (fn))[SSA_NAME_VERSION (var)] = NULL_TREE;
memset (var, 0, tree_size (var));
imm->prev = imm;
imm->next = imm;
imm->loc.ssa_name = var;
/* First put back the right tree node so that the tree checking
macros do not complain. */
TREE_SET_CODE (var, SSA_NAME);
/* Restore the version number. */
SSA_NAME_VERSION (var) = saved_ssa_name_version;
/* Hopefully this can go away once we have the new incremental
SSA updating code installed. */
SET_SSA_NAME_VAR_OR_IDENTIFIER (var, saved_ssa_name_var);
/* Note this SSA_NAME is now in the first list. */
SSA_NAME_IN_FREE_LIST (var) = 1;
/* And finally put it on the free list. */
vec_safe_push (FREE_SSANAMES (fn), var);
}
}
tree
c_finish_omp_for (location_t locus, tree decl, tree init, tree cond,
tree incr, tree body, tree pre_body)
{
location_t elocus = locus;
bool fail = false;
if (EXPR_HAS_LOCATION (init))
elocus = EXPR_LOCATION (init);
/* Validate the iteration variable. */
if (!INTEGRAL_TYPE_P (TREE_TYPE (decl)))
{
error ("%Hinvalid type for iteration variable %qE", &elocus, decl);
fail = true;
}
if (TYPE_UNSIGNED (TREE_TYPE (decl)))
warning (0, "%Hiteration variable %qE is unsigned", &elocus, decl);
/* In the case of "for (int i = 0...)", init will be a decl. It should
have a DECL_INITIAL that we can turn into an assignment. */
if (init == decl)
{
elocus = DECL_SOURCE_LOCATION (decl);
init = DECL_INITIAL (decl);
if (init == NULL)
{
error ("%H%qE is not initialized", &elocus, decl);
init = integer_zero_node;
fail = true;
}
init = build_modify_expr (decl, NOP_EXPR, init);
SET_EXPR_LOCATION (init, elocus);
}
gcc_assert (TREE_CODE (init) == MODIFY_EXPR);
gcc_assert (TREE_OPERAND (init, 0) == decl);
if (cond == NULL_TREE)
{
error ("%Hmissing controlling predicate", &elocus);
fail = true;
}
else
{
bool cond_ok = false;
if (EXPR_HAS_LOCATION (cond))
elocus = EXPR_LOCATION (cond);
if (TREE_CODE (cond) == LT_EXPR
|| TREE_CODE (cond) == LE_EXPR
|| TREE_CODE (cond) == GT_EXPR
|| TREE_CODE (cond) == GE_EXPR)
{
tree op0 = TREE_OPERAND (cond, 0);
tree op1 = TREE_OPERAND (cond, 1);
/* 2.5.1. The comparison in the condition is computed in the type
of DECL, otherwise the behavior is undefined.
For example:
long n; int i;
i < n;
according to ISO will be evaluated as:
(long)i < n;
We want to force:
i < (int)n; */
if (TREE_CODE (op0) == NOP_EXPR
&& decl == TREE_OPERAND (op0, 0))
{
TREE_OPERAND (cond, 0) = TREE_OPERAND (op0, 0);
TREE_OPERAND (cond, 1) = fold_build1 (NOP_EXPR, TREE_TYPE (decl),
TREE_OPERAND (cond, 1));
}
else if (TREE_CODE (op1) == NOP_EXPR
&& decl == TREE_OPERAND (op1, 0))
{
TREE_OPERAND (cond, 1) = TREE_OPERAND (op1, 0);
TREE_OPERAND (cond, 0) = fold_build1 (NOP_EXPR, TREE_TYPE (decl),
TREE_OPERAND (cond, 0));
}
if (decl == TREE_OPERAND (cond, 0))
cond_ok = true;
else if (decl == TREE_OPERAND (cond, 1))
{
TREE_SET_CODE (cond, swap_tree_comparison (TREE_CODE (cond)));
TREE_OPERAND (cond, 1) = TREE_OPERAND (cond, 0);
TREE_OPERAND (cond, 0) = decl;
cond_ok = true;
}
}
if (!cond_ok)
{
error ("%Hinvalid controlling predicate", &elocus);
fail = true;
}
}
if (incr == NULL_TREE)
{
error ("%Hmissing increment expression", &elocus);
fail = true;
}
else
{
bool incr_ok = false;
if (EXPR_HAS_LOCATION (incr))
elocus = EXPR_LOCATION (incr);
/* Check all the valid increment expressions: v++, v--, ++v, --v,
v = v + incr, v = incr + v and v = v - incr. */
switch (TREE_CODE (incr))
{
case POSTINCREMENT_EXPR:
case PREINCREMENT_EXPR:
case POSTDECREMENT_EXPR:
case PREDECREMENT_EXPR:
incr_ok = (TREE_OPERAND (incr, 0) == decl);
break;
case MODIFY_EXPR:
if (TREE_OPERAND (incr, 0) != decl)
break;
if (TREE_OPERAND (incr, 1) == decl)
break;
if (TREE_CODE (TREE_OPERAND (incr, 1)) == PLUS_EXPR
&& (TREE_OPERAND (TREE_OPERAND (incr, 1), 0) == decl
|| TREE_OPERAND (TREE_OPERAND (incr, 1), 1) == decl))
incr_ok = true;
else if (TREE_CODE (TREE_OPERAND (incr, 1)) == MINUS_EXPR
&& TREE_OPERAND (TREE_OPERAND (incr, 1), 0) == decl)
incr_ok = true;
else
{
tree t = check_omp_for_incr_expr (TREE_OPERAND (incr, 1), decl);
if (t != error_mark_node)
{
incr_ok = true;
t = build2 (PLUS_EXPR, TREE_TYPE (decl), decl, t);
incr = build2 (MODIFY_EXPR, void_type_node, decl, t);
}
}
break;
default:
break;
}
if (!incr_ok)
{
error ("%Hinvalid increment expression", &elocus);
fail = true;
}
}
if (fail)
return NULL;
else
{
tree t = make_node (OMP_FOR);
TREE_TYPE (t) = void_type_node;
OMP_FOR_INIT (t) = init;
OMP_FOR_COND (t) = cond;
OMP_FOR_INCR (t) = incr;
OMP_FOR_BODY (t) = body;
OMP_FOR_PRE_BODY (t) = pre_body;
SET_EXPR_LOCATION (t, locus);
return add_stmt (t);
}
}
tree
c_finish_omp_for (location_t locus, enum tree_code code, tree declv,
tree initv, tree condv, tree incrv, tree body, tree pre_body)
{
location_t elocus;
bool fail = false;
int i;
if (code == CILK_SIMD
&& !c_check_cilk_loop (locus, TREE_VEC_ELT (declv, 0)))
fail = true;
gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (initv));
gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (condv));
gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (incrv));
for (i = 0; i < TREE_VEC_LENGTH (declv); i++)
{
tree decl = TREE_VEC_ELT (declv, i);
tree init = TREE_VEC_ELT (initv, i);
tree cond = TREE_VEC_ELT (condv, i);
tree incr = TREE_VEC_ELT (incrv, i);
elocus = locus;
if (EXPR_HAS_LOCATION (init))
elocus = EXPR_LOCATION (init);
/* Validate the iteration variable. */
if (!INTEGRAL_TYPE_P (TREE_TYPE (decl))
&& TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE)
{
error_at (elocus, "invalid type for iteration variable %qE", decl);
fail = true;
}
/* In the case of "for (int i = 0...)", init will be a decl. It should
have a DECL_INITIAL that we can turn into an assignment. */
if (init == decl)
{
elocus = DECL_SOURCE_LOCATION (decl);
init = DECL_INITIAL (decl);
if (init == NULL)
{
error_at (elocus, "%qE is not initialized", decl);
init = integer_zero_node;
fail = true;
}
init = build_modify_expr (elocus, decl, NULL_TREE, NOP_EXPR,
/* FIXME diagnostics: This should
be the location of the INIT. */
elocus,
init,
NULL_TREE);
}
if (init != error_mark_node)
{
gcc_assert (TREE_CODE (init) == MODIFY_EXPR);
gcc_assert (TREE_OPERAND (init, 0) == decl);
}
if (cond == NULL_TREE)
{
error_at (elocus, "missing controlling predicate");
fail = true;
}
else
{
bool cond_ok = false;
if (EXPR_HAS_LOCATION (cond))
elocus = EXPR_LOCATION (cond);
if (TREE_CODE (cond) == LT_EXPR
|| TREE_CODE (cond) == LE_EXPR
|| TREE_CODE (cond) == GT_EXPR
|| TREE_CODE (cond) == GE_EXPR
|| TREE_CODE (cond) == NE_EXPR
|| TREE_CODE (cond) == EQ_EXPR)
{
tree op0 = TREE_OPERAND (cond, 0);
tree op1 = TREE_OPERAND (cond, 1);
/* 2.5.1. The comparison in the condition is computed in
the type of DECL, otherwise the behavior is undefined.
For example:
long n; int i;
i < n;
according to ISO will be evaluated as:
(long)i < n;
We want to force:
i < (int)n; */
if (TREE_CODE (op0) == NOP_EXPR
&& decl == TREE_OPERAND (op0, 0))
{
TREE_OPERAND (cond, 0) = TREE_OPERAND (op0, 0);
TREE_OPERAND (cond, 1)
= fold_build1_loc (elocus, NOP_EXPR, TREE_TYPE (decl),
TREE_OPERAND (cond, 1));
}
else if (TREE_CODE (op1) == NOP_EXPR
&& decl == TREE_OPERAND (op1, 0))
{
TREE_OPERAND (cond, 1) = TREE_OPERAND (op1, 0);
TREE_OPERAND (cond, 0)
= fold_build1_loc (elocus, NOP_EXPR, TREE_TYPE (decl),
TREE_OPERAND (cond, 0));
}
if (decl == TREE_OPERAND (cond, 0))
cond_ok = true;
else if (decl == TREE_OPERAND (cond, 1))
{
TREE_SET_CODE (cond,
swap_tree_comparison (TREE_CODE (cond)));
TREE_OPERAND (cond, 1) = TREE_OPERAND (cond, 0);
TREE_OPERAND (cond, 0) = decl;
cond_ok = true;
}
if (TREE_CODE (cond) == NE_EXPR
|| TREE_CODE (cond) == EQ_EXPR)
{
if (!INTEGRAL_TYPE_P (TREE_TYPE (decl)))
cond_ok = false;
else if (operand_equal_p (TREE_OPERAND (cond, 1),
TYPE_MIN_VALUE (TREE_TYPE (decl)),
0))
TREE_SET_CODE (cond, TREE_CODE (cond) == NE_EXPR
? GT_EXPR : LE_EXPR);
else if (operand_equal_p (TREE_OPERAND (cond, 1),
TYPE_MAX_VALUE (TREE_TYPE (decl)),
0))
TREE_SET_CODE (cond, TREE_CODE (cond) == NE_EXPR
? LT_EXPR : GE_EXPR);
else if (code != CILK_SIMD)
cond_ok = false;
}
}
if (!cond_ok)
{
error_at (elocus, "invalid controlling predicate");
fail = true;
}
}
if (incr == NULL_TREE)
{
error_at (elocus, "missing increment expression");
fail = true;
}
else
{
bool incr_ok = false;
if (EXPR_HAS_LOCATION (incr))
elocus = EXPR_LOCATION (incr);
/* Check all the valid increment expressions: v++, v--, ++v, --v,
v = v + incr, v = incr + v and v = v - incr. */
switch (TREE_CODE (incr))
{
case POSTINCREMENT_EXPR:
case PREINCREMENT_EXPR:
case POSTDECREMENT_EXPR:
case PREDECREMENT_EXPR:
if (TREE_OPERAND (incr, 0) != decl)
break;
incr_ok = true;
incr = c_omp_for_incr_canonicalize_ptr (elocus, decl, incr);
break;
case MODIFY_EXPR:
if (TREE_OPERAND (incr, 0) != decl)
break;
if (TREE_OPERAND (incr, 1) == decl)
break;
if (TREE_CODE (TREE_OPERAND (incr, 1)) == PLUS_EXPR
&& (TREE_OPERAND (TREE_OPERAND (incr, 1), 0) == decl
|| TREE_OPERAND (TREE_OPERAND (incr, 1), 1) == decl))
incr_ok = true;
else if ((TREE_CODE (TREE_OPERAND (incr, 1)) == MINUS_EXPR
|| (TREE_CODE (TREE_OPERAND (incr, 1))
== POINTER_PLUS_EXPR))
&& TREE_OPERAND (TREE_OPERAND (incr, 1), 0) == decl)
incr_ok = true;
else
{
tree t = check_omp_for_incr_expr (elocus,
TREE_OPERAND (incr, 1),
decl);
if (t != error_mark_node)
{
incr_ok = true;
t = build2 (PLUS_EXPR, TREE_TYPE (decl), decl, t);
incr = build2 (MODIFY_EXPR, void_type_node, decl, t);
}
}
break;
default:
break;
}
if (!incr_ok)
{
error_at (elocus, "invalid increment expression");
fail = true;
}
}
TREE_VEC_ELT (initv, i) = init;
TREE_VEC_ELT (incrv, i) = incr;
}
if (fail)
return NULL;
else
{
tree t = make_node (code);
TREE_TYPE (t) = void_type_node;
OMP_FOR_INIT (t) = initv;
OMP_FOR_COND (t) = condv;
OMP_FOR_INCR (t) = incrv;
OMP_FOR_BODY (t) = body;
OMP_FOR_PRE_BODY (t) = pre_body;
SET_EXPR_LOCATION (t, locus);
return add_stmt (t);
}
}