tree
c_build_bind_expr (tree block, tree body)
{
tree decls, bind;
if (block == NULL_TREE)
decls = NULL_TREE;
else if (TREE_CODE (block) == BLOCK)
decls = BLOCK_VARS (block);
else
{
decls = block;
if (DECL_ARTIFICIAL (decls))
block = NULL_TREE;
else
{
block = make_node (BLOCK);
BLOCK_VARS (block) = decls;
add_block_to_enclosing (block);
}
}
if (!body)
body = build_empty_stmt ();
if (decls || block)
{
bind = build3 (BIND_EXPR, void_type_node, decls, body, block);
TREE_SIDE_EFFECTS (bind) = 1;
}
else
bind = body;
return bind;
}
static void
expand_used_vars_for_block (tree block, bool toplevel)
{
size_t i, j, old_sv_num, this_sv_num, new_sv_num;
tree t;
old_sv_num = toplevel ? 0 : stack_vars_num;
/* Expand all variables at this level. */
for (t = BLOCK_VARS (block); t ; t = TREE_CHAIN (t))
if (TREE_USED (t))
expand_one_var (t, toplevel);
this_sv_num = stack_vars_num;
/* Expand all variables at containing levels. */
for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t))
expand_used_vars_for_block (t, false);
/* Since we do not track exact variable lifetimes (which is not even
possible for varibles whose address escapes), we mirror the block
tree in the interference graph. Here we cause all variables at this
level, and all sublevels, to conflict. Do make certain that a
variable conflicts with itself. */
if (old_sv_num < this_sv_num)
{
new_sv_num = stack_vars_num;
resize_stack_vars_conflict (new_sv_num);
for (i = old_sv_num; i < new_sv_num; ++i)
for (j = i < this_sv_num ? i+1 : this_sv_num; j-- > old_sv_num ;)
add_stack_var_conflict (i, j);
}
}
static void
xcoffout_block (tree block, int depth, tree args)
{
while (block)
{
/* Ignore blocks never expanded or otherwise marked as real. */
if (TREE_USED (block))
{
/* When we reach the specified block, output its symbols. */
if (BLOCK_NUMBER (block) == do_block)
{
/* Output the syms of the block. */
if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
dbxout_syms (BLOCK_VARS (block));
if (args)
dbxout_reg_parms (args);
/* We are now done with the block. Don't go to inner blocks. */
return;
}
/* If we are past the specified block, stop the scan. */
else if (BLOCK_NUMBER (block) >= do_block)
return;
/* Output the subblocks. */
xcoffout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
}
block = BLOCK_CHAIN (block);
}
}
static void
set_block_origin_self (tree stmt)
{
if (BLOCK_ABSTRACT_ORIGIN (stmt) == NULL_TREE)
{
BLOCK_ABSTRACT_ORIGIN (stmt) = stmt;
{
tree local_decl;
for (local_decl = BLOCK_VARS (stmt);
local_decl != NULL_TREE;
local_decl = DECL_CHAIN (local_decl))
if (! DECL_EXTERNAL (local_decl))
set_decl_origin_self (local_decl); /* Potential recursion. */
}
{
tree subblock;
for (subblock = BLOCK_SUBBLOCKS (stmt);
subblock != NULL_TREE;
subblock = BLOCK_CHAIN (subblock))
set_block_origin_self (subblock); /* Recurse. */
}
}
}
static void
set_block_abstract_flags (tree stmt, int setting)
{
tree local_decl;
tree subblock;
unsigned int i;
BLOCK_ABSTRACT (stmt) = setting;
for (local_decl = BLOCK_VARS (stmt);
local_decl != NULL_TREE;
local_decl = DECL_CHAIN (local_decl))
if (! DECL_EXTERNAL (local_decl))
set_decl_abstract_flags (local_decl, setting);
for (i = 0; i < BLOCK_NUM_NONLOCALIZED_VARS (stmt); i++)
{
local_decl = BLOCK_NONLOCALIZED_VAR (stmt, i);
if ((TREE_CODE (local_decl) == VAR_DECL && !TREE_STATIC (local_decl))
|| TREE_CODE (local_decl) == PARM_DECL)
set_decl_abstract_flags (local_decl, setting);
}
for (subblock = BLOCK_SUBBLOCKS (stmt);
subblock != NULL_TREE;
subblock = BLOCK_CHAIN (subblock))
set_block_abstract_flags (subblock, setting);
}
static void
write_ts_block_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
{
streamer_write_chain (ob, BLOCK_VARS (expr), ref_p);
stream_write_tree (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
/* Stream BLOCK_ABSTRACT_ORIGIN for the limited cases we can handle - those
that represent inlined function scopes.
For the rest them on the floor instead of ICEing in dwarf2out.c. */
if (inlined_function_outer_scope_p (expr))
{
tree ultimate_origin = block_ultimate_origin (expr);
stream_write_tree (ob, ultimate_origin, ref_p);
}
else
stream_write_tree (ob, NULL_TREE, ref_p);
/* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information
for early inlined BLOCKs so drop it on the floor instead of ICEing in
dwarf2out.c. */
/* BLOCK_FRAGMENT_ORIGIN and BLOCK_FRAGMENT_CHAIN is not live at LTO
streaming time. */
/* Do not output BLOCK_SUBBLOCKS. Instead on streaming-in this
list is re-constructed from BLOCK_SUPERCONTEXT. */
}
static void
clear_tree_used (tree block)
{
tree t;
for (t = BLOCK_VARS (block); t ; t = TREE_CHAIN (t))
/* if (!TREE_STATIC (t) && !DECL_EXTERNAL (t)) */
TREE_USED (t) = 0;
for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t))
clear_tree_used (t);
}
enum omp_clause_default_kind
cxx_omp_predetermined_sharing (tree decl)
{
tree type;
/* Static data members are predetermined as shared. */
if (TREE_STATIC (decl))
{
tree ctx = CP_DECL_CONTEXT (decl);
if (TYPE_P (ctx) && MAYBE_CLASS_TYPE_P (ctx))
return OMP_CLAUSE_DEFAULT_SHARED;
}
type = TREE_TYPE (decl);
if (TREE_CODE (type) == REFERENCE_TYPE)
{
if (!is_invisiref_parm (decl))
return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
type = TREE_TYPE (type);
if (TREE_CODE (decl) == RESULT_DECL && DECL_NAME (decl))
{
/* NVR doesn't preserve const qualification of the
variable's type. */
tree outer = outer_curly_brace_block (current_function_decl);
tree var;
if (outer)
for (var = BLOCK_VARS (outer); var; var = TREE_CHAIN (var))
if (DECL_NAME (decl) == DECL_NAME (var)
&& (TYPE_MAIN_VARIANT (type)
== TYPE_MAIN_VARIANT (TREE_TYPE (var))))
{
if (TYPE_READONLY (TREE_TYPE (var)))
type = TREE_TYPE (var);
break;
}
}
}
if (type == error_mark_node)
return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
/* Variables with const-qualified type having no mutable member
are predetermined shared. */
if (TYPE_READONLY (type) && !cp_has_mutable_p (type))
return OMP_CLAUSE_DEFAULT_SHARED;
return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
}
static tree
build_trivial_generic_function ()
{
auto_vec <tree> param_types;
tree fndecl = make_fndecl (integer_type_node,
"test_fn",
param_types);
ASSERT_TRUE (fndecl != NULL);
/* Populate the function. */
tree retval = build_decl (UNKNOWN_LOCATION, RESULT_DECL,
NULL_TREE, integer_type_node);
DECL_ARTIFICIAL (retval) = 1;
DECL_IGNORED_P (retval) = 1;
DECL_RESULT (fndecl) = retval;
/* Create a BIND_EXPR, and within it, a statement list. */
tree stmt_list = alloc_stmt_list ();
tree_stmt_iterator stmt_iter = tsi_start (stmt_list);
tree block = make_node (BLOCK);
tree bind_expr
= build3 (BIND_EXPR, void_type_node, NULL, stmt_list, block);
tree modify_retval = build2 (MODIFY_EXPR,
integer_type_node,
retval,
build_int_cst (integer_type_node, 42));
tree return_stmt = build1 (RETURN_EXPR,
integer_type_node,
modify_retval);
tsi_link_after (&stmt_iter, return_stmt, TSI_CONTINUE_LINKING);
DECL_INITIAL (fndecl) = block;
/* how to add to function? the following appears to be how to
set the body of a fndecl: */
DECL_SAVED_TREE(fndecl) = bind_expr;
/* Ensure that locals appear in the debuginfo. */
BLOCK_VARS (block) = BIND_EXPR_VARS (bind_expr);
return fndecl;
}
void
genrtl_scope_stmt (tree t)
{
tree block = SCOPE_STMT_BLOCK (t);
if (!SCOPE_NO_CLEANUPS_P (t))
{
if (SCOPE_BEGIN_P (t))
expand_start_bindings_and_block (2 * SCOPE_NULLIFIED_P (t), block);
else if (SCOPE_END_P (t))
expand_end_bindings (NULL_TREE, !SCOPE_NULLIFIED_P (t), 0);
}
else if (!SCOPE_NULLIFIED_P (t))
{
rtx note = emit_note (SCOPE_BEGIN_P (t)
? NOTE_INSN_BLOCK_BEG : NOTE_INSN_BLOCK_END);
NOTE_BLOCK (note) = block;
}
/* If we're at the end of a scope that contains inlined nested
functions, we have to decide whether or not to write them out. */
if (block && SCOPE_END_P (t))
{
tree fn;
for (fn = BLOCK_VARS (block); fn; fn = TREE_CHAIN (fn))
{
if (TREE_CODE (fn) == FUNCTION_DECL
&& DECL_CONTEXT (fn) == current_function_decl
&& DECL_SAVED_INSNS (fn)
&& DECL_SAVED_INSNS (fn)->saved_for_inline
&& !TREE_ASM_WRITTEN (fn)
&& TREE_ADDRESSABLE (fn))
{
push_function_context ();
output_inline_function (fn);
pop_function_context ();
}
}
}
}
static void
write_ts_block_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
{
/* Do not stream BLOCK_SOURCE_LOCATION. We cannot handle debug information
for early inlining so drop it on the floor instead of ICEing in
dwarf2out.c. */
streamer_write_chain (ob, BLOCK_VARS (expr), ref_p);
/* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information
for early inlining so drop it on the floor instead of ICEing in
dwarf2out.c. */
stream_write_tree (ob, BLOCK_SUPERCONTEXT (expr), ref_p);
/* Do not stream BLOCK_ABSTRACT_ORIGIN. We cannot handle debug information
for early inlining so drop it on the floor instead of ICEing in
dwarf2out.c. */
stream_write_tree (ob, BLOCK_FRAGMENT_ORIGIN (expr), ref_p);
stream_write_tree (ob, BLOCK_FRAGMENT_CHAIN (expr), ref_p);
/* Do not output BLOCK_SUBBLOCKS. Instead on streaming-in this
list is re-constructed from BLOCK_SUPERCONTEXT. */
}
static void
lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
struct data_in *data_in, tree expr)
{
/* Do not stream BLOCK_SOURCE_LOCATION. We cannot handle debug information
for early inlining so drop it on the floor instead of ICEing in
dwarf2out.c. */
BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
/* Do not stream BLOCK_NONLOCALIZED_VARS. We cannot handle debug information
for early inlining so drop it on the floor instead of ICEing in
dwarf2out.c. */
BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
/* Do not stream BLOCK_ABSTRACT_ORIGIN. We cannot handle debug information
for early inlining so drop it on the floor instead of ICEing in
dwarf2out.c. */
BLOCK_FRAGMENT_ORIGIN (expr) = stream_read_tree (ib, data_in);
BLOCK_FRAGMENT_CHAIN (expr) = stream_read_tree (ib, data_in);
/* We re-compute BLOCK_SUBBLOCKS of our parent here instead
of streaming it. For non-BLOCK BLOCK_SUPERCONTEXTs we still
stream the child relationship explicitly. */
if (BLOCK_SUPERCONTEXT (expr)
&& TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
{
BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
}
/* The global block is rooted at the TU decl. Hook it here to
avoid the need to stream in this block during WPA time. */
else if (BLOCK_SUPERCONTEXT (expr)
&& TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
/* The function-level block is connected at the time we read in
function bodies for the same reason. */
}
/* Return true if DECL is const qualified var having no mutable member. */
bool
cxx_omp_const_qual_no_mutable (tree decl)
{
tree type = TREE_TYPE (decl);
if (TREE_CODE (type) == REFERENCE_TYPE)
{
if (!is_invisiref_parm (decl))
return false;
type = TREE_TYPE (type);
if (TREE_CODE (decl) == RESULT_DECL && DECL_NAME (decl))
{
/* NVR doesn't preserve const qualification of the
variable's type. */
tree outer = outer_curly_brace_block (current_function_decl);
tree var;
if (outer)
for (var = BLOCK_VARS (outer); var; var = DECL_CHAIN (var))
if (DECL_NAME (decl) == DECL_NAME (var)
&& (TYPE_MAIN_VARIANT (type)
== TYPE_MAIN_VARIANT (TREE_TYPE (var))))
{
if (TYPE_READONLY (TREE_TYPE (var)))
type = TREE_TYPE (var);
break;
}
}
}
if (type == error_mark_node)
return false;
/* Variables with const-qualified type having no mutable member
are predetermined shared. */
if (TYPE_READONLY (type) && !cp_has_mutable_p (type))
return true;
return false;
}
static void
sdbout_block (tree block)
{
while (block)
{
/* Ignore blocks never expanded or otherwise marked as real. */
if (TREE_USED (block))
{
/* When we reach the specified block, output its symbols. */
if (BLOCK_NUMBER (block) == do_block)
sdbout_syms (BLOCK_VARS (block));
/* If we are past the specified block, stop the scan. */
if (BLOCK_NUMBER (block) > do_block)
return;
/* Scan the blocks within this block. */
sdbout_block (BLOCK_SUBBLOCKS (block));
}
block = BLOCK_CHAIN (block);
}
}
static void
mark_blocks_with_used_vars (tree block)
{
tree var;
tree subblock;
if (!TREE_USED (block))
{
for (var = BLOCK_VARS (block);
var;
var = TREE_CHAIN (var))
{
if (TREE_USED (var))
{
TREE_USED (block) = true;
break;
}
}
}
for (subblock = BLOCK_SUBBLOCKS (block);
subblock;
subblock = BLOCK_CHAIN (subblock))
mark_blocks_with_used_vars (subblock);
}
void
cp_genericize (tree fndecl)
{
tree t;
/* Fix up the types of parms passed by invisible reference. */
for (t = DECL_ARGUMENTS (fndecl); t; t = DECL_CHAIN (t))
if (TREE_ADDRESSABLE (TREE_TYPE (t)))
{
/* If a function's arguments are copied to create a thunk,
then DECL_BY_REFERENCE will be set -- but the type of the
argument will be a pointer type, so we will never get
here. */
gcc_assert (!DECL_BY_REFERENCE (t));
gcc_assert (DECL_ARG_TYPE (t) != TREE_TYPE (t));
TREE_TYPE (t) = DECL_ARG_TYPE (t);
DECL_BY_REFERENCE (t) = 1;
TREE_ADDRESSABLE (t) = 0;
relayout_decl (t);
}
/* Do the same for the return value. */
if (TREE_ADDRESSABLE (TREE_TYPE (DECL_RESULT (fndecl))))
{
t = DECL_RESULT (fndecl);
TREE_TYPE (t) = build_reference_type (TREE_TYPE (t));
DECL_BY_REFERENCE (t) = 1;
TREE_ADDRESSABLE (t) = 0;
relayout_decl (t);
if (DECL_NAME (t))
{
/* Adjust DECL_VALUE_EXPR of the original var. */
tree outer = outer_curly_brace_block (current_function_decl);
tree var;
if (outer)
for (var = BLOCK_VARS (outer); var; var = DECL_CHAIN (var))
if (DECL_NAME (t) == DECL_NAME (var)
&& DECL_HAS_VALUE_EXPR_P (var)
&& DECL_VALUE_EXPR (var) == t)
{
tree val = convert_from_reference (t);
SET_DECL_VALUE_EXPR (var, val);
break;
}
}
}
/* If we're a clone, the body is already GIMPLE. */
if (DECL_CLONED_FUNCTION_P (fndecl))
return;
/* Expand all the array notations here. */
if (flag_enable_cilkplus
&& contains_array_notation_expr (DECL_SAVED_TREE (fndecl)))
DECL_SAVED_TREE (fndecl) =
expand_array_notation_exprs (DECL_SAVED_TREE (fndecl));
/* We do want to see every occurrence of the parms, so we can't just use
walk_tree's hash functionality. */
cp_genericize_tree (&DECL_SAVED_TREE (fndecl));
if (flag_sanitize & SANITIZE_RETURN)
cp_ubsan_maybe_instrument_return (fndecl);
/* Do everything else. */
c_genericize (fndecl);
gcc_assert (bc_label[bc_break] == NULL);
gcc_assert (bc_label[bc_continue] == NULL);
}
static tree
cp_genericize_r (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
struct cp_genericize_data *wtd = (struct cp_genericize_data *) data;
struct pointer_set_t *p_set = wtd->p_set;
/* If in an OpenMP context, note var uses. */
if (__builtin_expect (wtd->omp_ctx != NULL, 0)
&& (VAR_P (stmt)
|| TREE_CODE (stmt) == PARM_DECL
|| TREE_CODE (stmt) == RESULT_DECL)
&& omp_var_to_track (stmt))
omp_cxx_notice_variable (wtd->omp_ctx, stmt);
if (is_invisiref_parm (stmt)
/* Don't dereference parms in a thunk, pass the references through. */
&& !(DECL_THUNK_P (current_function_decl)
&& TREE_CODE (stmt) == PARM_DECL))
{
*stmt_p = convert_from_reference (stmt);
*walk_subtrees = 0;
return NULL;
}
/* Map block scope extern declarations to visible declarations with the
same name and type in outer scopes if any. */
if (cp_function_chain->extern_decl_map
&& VAR_OR_FUNCTION_DECL_P (stmt)
&& DECL_EXTERNAL (stmt))
{
struct cxx_int_tree_map *h, in;
in.uid = DECL_UID (stmt);
h = (struct cxx_int_tree_map *)
htab_find_with_hash (cp_function_chain->extern_decl_map,
&in, in.uid);
if (h)
{
*stmt_p = h->to;
*walk_subtrees = 0;
return NULL;
}
}
/* Other than invisiref parms, don't walk the same tree twice. */
if (pointer_set_contains (p_set, stmt))
{
*walk_subtrees = 0;
return NULL_TREE;
}
if (TREE_CODE (stmt) == ADDR_EXPR
&& is_invisiref_parm (TREE_OPERAND (stmt, 0)))
{
/* If in an OpenMP context, note var uses. */
if (__builtin_expect (wtd->omp_ctx != NULL, 0)
&& omp_var_to_track (TREE_OPERAND (stmt, 0)))
omp_cxx_notice_variable (wtd->omp_ctx, TREE_OPERAND (stmt, 0));
*stmt_p = convert (TREE_TYPE (stmt), TREE_OPERAND (stmt, 0));
*walk_subtrees = 0;
}
else if (TREE_CODE (stmt) == RETURN_EXPR
&& TREE_OPERAND (stmt, 0)
&& is_invisiref_parm (TREE_OPERAND (stmt, 0)))
/* Don't dereference an invisiref RESULT_DECL inside a RETURN_EXPR. */
*walk_subtrees = 0;
else if (TREE_CODE (stmt) == OMP_CLAUSE)
switch (OMP_CLAUSE_CODE (stmt))
{
case OMP_CLAUSE_LASTPRIVATE:
/* Don't dereference an invisiref in OpenMP clauses. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
{
*walk_subtrees = 0;
if (OMP_CLAUSE_LASTPRIVATE_STMT (stmt))
cp_walk_tree (&OMP_CLAUSE_LASTPRIVATE_STMT (stmt),
cp_genericize_r, data, NULL);
}
break;
case OMP_CLAUSE_PRIVATE:
/* Don't dereference an invisiref in OpenMP clauses. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
*walk_subtrees = 0;
else if (wtd->omp_ctx != NULL)
{
/* Private clause doesn't cause any references to the
var in outer contexts, avoid calling
omp_cxx_notice_variable for it. */
struct cp_genericize_omp_taskreg *old = wtd->omp_ctx;
wtd->omp_ctx = NULL;
cp_walk_tree (&OMP_CLAUSE_DECL (stmt), cp_genericize_r,
data, NULL);
wtd->omp_ctx = old;
*walk_subtrees = 0;
}
break;
case OMP_CLAUSE_SHARED:
case OMP_CLAUSE_FIRSTPRIVATE:
case OMP_CLAUSE_COPYIN:
case OMP_CLAUSE_COPYPRIVATE:
/* Don't dereference an invisiref in OpenMP clauses. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
*walk_subtrees = 0;
break;
case OMP_CLAUSE_REDUCTION:
/* Don't dereference an invisiref in reduction clause's
OMP_CLAUSE_DECL either. OMP_CLAUSE_REDUCTION_{INIT,MERGE}
still needs to be genericized. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
{
*walk_subtrees = 0;
if (OMP_CLAUSE_REDUCTION_INIT (stmt))
cp_walk_tree (&OMP_CLAUSE_REDUCTION_INIT (stmt),
cp_genericize_r, data, NULL);
if (OMP_CLAUSE_REDUCTION_MERGE (stmt))
cp_walk_tree (&OMP_CLAUSE_REDUCTION_MERGE (stmt),
cp_genericize_r, data, NULL);
}
break;
default:
break;
}
else if (IS_TYPE_OR_DECL_P (stmt))
*walk_subtrees = 0;
/* Due to the way voidify_wrapper_expr is written, we don't get a chance
to lower this construct before scanning it, so we need to lower these
before doing anything else. */
else if (TREE_CODE (stmt) == CLEANUP_STMT)
*stmt_p = build2_loc (EXPR_LOCATION (stmt),
CLEANUP_EH_ONLY (stmt) ? TRY_CATCH_EXPR
: TRY_FINALLY_EXPR,
void_type_node,
CLEANUP_BODY (stmt),
CLEANUP_EXPR (stmt));
else if (TREE_CODE (stmt) == IF_STMT)
{
genericize_if_stmt (stmt_p);
/* *stmt_p has changed, tail recurse to handle it again. */
return cp_genericize_r (stmt_p, walk_subtrees, data);
}
/* COND_EXPR might have incompatible types in branches if one or both
arms are bitfields. Fix it up now. */
else if (TREE_CODE (stmt) == COND_EXPR)
{
tree type_left
= (TREE_OPERAND (stmt, 1)
? is_bitfield_expr_with_lowered_type (TREE_OPERAND (stmt, 1))
: NULL_TREE);
tree type_right
= (TREE_OPERAND (stmt, 2)
? is_bitfield_expr_with_lowered_type (TREE_OPERAND (stmt, 2))
: NULL_TREE);
if (type_left
&& !useless_type_conversion_p (TREE_TYPE (stmt),
TREE_TYPE (TREE_OPERAND (stmt, 1))))
{
TREE_OPERAND (stmt, 1)
= fold_convert (type_left, TREE_OPERAND (stmt, 1));
gcc_assert (useless_type_conversion_p (TREE_TYPE (stmt),
type_left));
}
if (type_right
&& !useless_type_conversion_p (TREE_TYPE (stmt),
TREE_TYPE (TREE_OPERAND (stmt, 2))))
{
TREE_OPERAND (stmt, 2)
= fold_convert (type_right, TREE_OPERAND (stmt, 2));
gcc_assert (useless_type_conversion_p (TREE_TYPE (stmt),
type_right));
}
}
else if (TREE_CODE (stmt) == BIND_EXPR)
{
if (__builtin_expect (wtd->omp_ctx != NULL, 0))
{
tree decl;
for (decl = BIND_EXPR_VARS (stmt); decl; decl = DECL_CHAIN (decl))
if (VAR_P (decl)
&& !DECL_EXTERNAL (decl)
&& omp_var_to_track (decl))
{
splay_tree_node n
= splay_tree_lookup (wtd->omp_ctx->variables,
(splay_tree_key) decl);
if (n == NULL)
splay_tree_insert (wtd->omp_ctx->variables,
(splay_tree_key) decl,
TREE_STATIC (decl)
? OMP_CLAUSE_DEFAULT_SHARED
: OMP_CLAUSE_DEFAULT_PRIVATE);
}
}
wtd->bind_expr_stack.safe_push (stmt);
cp_walk_tree (&BIND_EXPR_BODY (stmt),
cp_genericize_r, data, NULL);
wtd->bind_expr_stack.pop ();
}
else if (TREE_CODE (stmt) == USING_STMT)
{
tree block = NULL_TREE;
/* Get the innermost inclosing GIMPLE_BIND that has a non NULL
BLOCK, and append an IMPORTED_DECL to its
BLOCK_VARS chained list. */
if (wtd->bind_expr_stack.exists ())
{
int i;
for (i = wtd->bind_expr_stack.length () - 1; i >= 0; i--)
if ((block = BIND_EXPR_BLOCK (wtd->bind_expr_stack[i])))
break;
}
if (block)
{
tree using_directive;
gcc_assert (TREE_OPERAND (stmt, 0));
using_directive = make_node (IMPORTED_DECL);
TREE_TYPE (using_directive) = void_type_node;
IMPORTED_DECL_ASSOCIATED_DECL (using_directive)
= TREE_OPERAND (stmt, 0);
DECL_CHAIN (using_directive) = BLOCK_VARS (block);
BLOCK_VARS (block) = using_directive;
}
/* The USING_STMT won't appear in GENERIC. */
*stmt_p = build1 (NOP_EXPR, void_type_node, integer_zero_node);
*walk_subtrees = 0;
}
else if (TREE_CODE (stmt) == DECL_EXPR
&& TREE_CODE (DECL_EXPR_DECL (stmt)) == USING_DECL)
{
/* Using decls inside DECL_EXPRs are just dropped on the floor. */
*stmt_p = build1 (NOP_EXPR, void_type_node, integer_zero_node);
*walk_subtrees = 0;
}
else if (TREE_CODE (stmt) == OMP_PARALLEL || TREE_CODE (stmt) == OMP_TASK)
{
struct cp_genericize_omp_taskreg omp_ctx;
tree c, decl;
splay_tree_node n;
*walk_subtrees = 0;
cp_walk_tree (&OMP_CLAUSES (stmt), cp_genericize_r, data, NULL);
omp_ctx.is_parallel = TREE_CODE (stmt) == OMP_PARALLEL;
omp_ctx.default_shared = omp_ctx.is_parallel;
omp_ctx.outer = wtd->omp_ctx;
omp_ctx.variables = splay_tree_new (splay_tree_compare_decl_uid, 0, 0);
wtd->omp_ctx = &omp_ctx;
for (c = OMP_CLAUSES (stmt); c; c = OMP_CLAUSE_CHAIN (c))
switch (OMP_CLAUSE_CODE (c))
{
case OMP_CLAUSE_SHARED:
case OMP_CLAUSE_PRIVATE:
case OMP_CLAUSE_FIRSTPRIVATE:
case OMP_CLAUSE_LASTPRIVATE:
decl = OMP_CLAUSE_DECL (c);
if (decl == error_mark_node || !omp_var_to_track (decl))
break;
n = splay_tree_lookup (omp_ctx.variables, (splay_tree_key) decl);
if (n != NULL)
break;
splay_tree_insert (omp_ctx.variables, (splay_tree_key) decl,
OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED
? OMP_CLAUSE_DEFAULT_SHARED
: OMP_CLAUSE_DEFAULT_PRIVATE);
if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_PRIVATE
&& omp_ctx.outer)
omp_cxx_notice_variable (omp_ctx.outer, decl);
break;
case OMP_CLAUSE_DEFAULT:
if (OMP_CLAUSE_DEFAULT_KIND (c) == OMP_CLAUSE_DEFAULT_SHARED)
omp_ctx.default_shared = true;
default:
break;
}
cp_walk_tree (&OMP_BODY (stmt), cp_genericize_r, data, NULL);
wtd->omp_ctx = omp_ctx.outer;
splay_tree_delete (omp_ctx.variables);
}
else if (TREE_CODE (stmt) == CONVERT_EXPR)
gcc_assert (!CONVERT_EXPR_VBASE_PATH (stmt));
else if (TREE_CODE (stmt) == FOR_STMT)
genericize_for_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == WHILE_STMT)
genericize_while_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == DO_STMT)
genericize_do_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == SWITCH_STMT)
genericize_switch_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == CONTINUE_STMT)
genericize_continue_stmt (stmt_p);
else if (TREE_CODE (stmt) == BREAK_STMT)
genericize_break_stmt (stmt_p);
else if (TREE_CODE (stmt) == OMP_FOR
|| TREE_CODE (stmt) == OMP_SIMD
|| TREE_CODE (stmt) == OMP_DISTRIBUTE)
genericize_omp_for_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == SIZEOF_EXPR)
{
if (SIZEOF_EXPR_TYPE_P (stmt))
*stmt_p
= cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (stmt, 0)),
SIZEOF_EXPR, false);
else if (TYPE_P (TREE_OPERAND (stmt, 0)))
*stmt_p = cxx_sizeof_or_alignof_type (TREE_OPERAND (stmt, 0),
SIZEOF_EXPR, false);
else
*stmt_p = cxx_sizeof_or_alignof_expr (TREE_OPERAND (stmt, 0),
SIZEOF_EXPR, false);
if (*stmt_p == error_mark_node)
*stmt_p = size_one_node;
return NULL;
}
pointer_set_insert (p_set, *stmt_p);
return NULL;
}
static tree
cp_genericize_r (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
struct cp_genericize_data *wtd = (struct cp_genericize_data *) data;
struct pointer_set_t *p_set = wtd->p_set;
if (is_invisiref_parm (stmt)
/* Don't dereference parms in a thunk, pass the references through. */
&& !(DECL_THUNK_P (current_function_decl)
&& TREE_CODE (stmt) == PARM_DECL))
{
*stmt_p = convert_from_reference (stmt);
*walk_subtrees = 0;
return NULL;
}
/* Map block scope extern declarations to visible declarations with the
same name and type in outer scopes if any. */
if (cp_function_chain->extern_decl_map
&& (TREE_CODE (stmt) == FUNCTION_DECL || TREE_CODE (stmt) == VAR_DECL)
&& DECL_EXTERNAL (stmt))
{
struct cxx_int_tree_map *h, in;
in.uid = DECL_UID (stmt);
h = (struct cxx_int_tree_map *)
htab_find_with_hash (cp_function_chain->extern_decl_map,
&in, in.uid);
if (h)
{
*stmt_p = h->to;
*walk_subtrees = 0;
return NULL;
}
}
/* Other than invisiref parms, don't walk the same tree twice. */
if (pointer_set_contains (p_set, stmt))
{
*walk_subtrees = 0;
return NULL_TREE;
}
if (TREE_CODE (stmt) == ADDR_EXPR
&& is_invisiref_parm (TREE_OPERAND (stmt, 0)))
{
*stmt_p = convert (TREE_TYPE (stmt), TREE_OPERAND (stmt, 0));
*walk_subtrees = 0;
}
else if (TREE_CODE (stmt) == RETURN_EXPR
&& TREE_OPERAND (stmt, 0)
&& is_invisiref_parm (TREE_OPERAND (stmt, 0)))
/* Don't dereference an invisiref RESULT_DECL inside a RETURN_EXPR. */
*walk_subtrees = 0;
else if (TREE_CODE (stmt) == OMP_CLAUSE)
switch (OMP_CLAUSE_CODE (stmt))
{
case OMP_CLAUSE_LASTPRIVATE:
/* Don't dereference an invisiref in OpenMP clauses. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
{
*walk_subtrees = 0;
if (OMP_CLAUSE_LASTPRIVATE_STMT (stmt))
cp_walk_tree (&OMP_CLAUSE_LASTPRIVATE_STMT (stmt),
cp_genericize_r, data, NULL);
}
break;
case OMP_CLAUSE_PRIVATE:
case OMP_CLAUSE_SHARED:
case OMP_CLAUSE_FIRSTPRIVATE:
case OMP_CLAUSE_COPYIN:
case OMP_CLAUSE_COPYPRIVATE:
/* Don't dereference an invisiref in OpenMP clauses. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
*walk_subtrees = 0;
break;
case OMP_CLAUSE_REDUCTION:
gcc_assert (!is_invisiref_parm (OMP_CLAUSE_DECL (stmt)));
break;
default:
break;
}
else if (IS_TYPE_OR_DECL_P (stmt))
*walk_subtrees = 0;
/* Due to the way voidify_wrapper_expr is written, we don't get a chance
to lower this construct before scanning it, so we need to lower these
before doing anything else. */
else if (TREE_CODE (stmt) == CLEANUP_STMT)
*stmt_p = build2 (CLEANUP_EH_ONLY (stmt) ? TRY_CATCH_EXPR
: TRY_FINALLY_EXPR,
void_type_node,
CLEANUP_BODY (stmt),
CLEANUP_EXPR (stmt));
else if (TREE_CODE (stmt) == IF_STMT)
{
genericize_if_stmt (stmt_p);
/* *stmt_p has changed, tail recurse to handle it again. */
return cp_genericize_r (stmt_p, walk_subtrees, data);
}
/* COND_EXPR might have incompatible types in branches if one or both
arms are bitfields.FILE *
my_dump_begin (int phase, int *flag_ptr) Fix it up now. */
else if (TREE_CODE (stmt) == COND_EXPR)
{
tree type_left
= (TREE_OPERAND (stmt, 1)
? is_bitfield_expr_with_lowered_type (TREE_OPERAND (stmt, 1))
: NULL_TREE);
tree type_right
= (TREE_OPERAND (stmt, 2)
? is_bitfield_expr_with_lowered_type (TREE_OPERAND (stmt, 2))
: NULL_TREE);
if (type_left
&& !useless_type_conversion_p (TREE_TYPE (stmt),
TREE_TYPE (TREE_OPERAND (stmt, 1))))
{
TREE_OPERAND (stmt, 1)
= fold_convert (type_left, TREE_OPERAND (stmt, 1));
gcc_assert (useless_type_conversion_p (TREE_TYPE (stmt),
type_left));
}
if (type_right
&& !useless_type_conversion_p (TREE_TYPE (stmt),
TREE_TYPE (TREE_OPERAND (stmt, 2))))
{
TREE_OPERAND (stmt, 2)
= fold_convert (type_right, TREE_OPERAND (stmt, 2));
gcc_assert (useless_type_conversion_p (TREE_TYPE (stmt),
type_right));
}
}
else if (TREE_CODE (stmt) == BIND_EXPR)
{
VEC_safe_push (tree, heap, wtd->bind_expr_stack, stmt);
cp_walk_tree (&BIND_EXPR_BODY (stmt),
cp_genericize_r, data, NULL);
VEC_pop (tree, wtd->bind_expr_stack);
}
else if (TREE_CODE (stmt) == USING_STMT)
{
tree block = NULL_TREE;
/* Get the innermost inclosing GIMPLE_BIND that has a non NULL
BLOCK, and append an IMPORTED_DECL to its
BLOCK_VARS chained list. */
if (wtd->bind_expr_stack)
{
int i;
for (i = VEC_length (tree, wtd->bind_expr_stack) - 1; i >= 0; i--)
if ((block = BIND_EXPR_BLOCK (VEC_index (tree,
wtd->bind_expr_stack, i))))
break;
}
if (block)
{
tree using_directive;
gcc_assert (TREE_OPERAND (stmt, 0));
using_directive = make_node (IMPORTED_DECL);
TREE_TYPE (using_directive) = void_type_node;
IMPORTED_DECL_ASSOCIATED_DECL (using_directive)
= TREE_OPERAND (stmt, 0);
DECL_CHAIN (using_directive) = BLOCK_VARS (block);
BLOCK_VARS (block) = using_directive;
}
/* The USING_STMT won't appear in GENERIC. */
*stmt_p = build1 (NOP_EXPR, void_type_node, integer_zero_node);
*walk_subtrees = 0;
}
else if (TREE_CODE (stmt) == DECL_EXPR
&& TREE_CODE (DECL_EXPR_DECL (stmt)) == USING_DECL)
{
/* Using decls inside DECL_EXPRs are just dropped on the floor. */
*stmt_p = build1 (NOP_EXPR, void_type_node, integer_zero_node);
*walk_subtrees = 0;
}
pointer_set_insert (p_set, *stmt_p);
return NULL;
}
void
gcc_cp_genericize (tree fndecl)
{
register_src_file(fndecl);
tree t;
struct cp_genericize_data wtd;
/* Fix up the types of parms passed by invisible reference. */
for (t = DECL_ARGUMENTS (fndecl); t; t = DECL_CHAIN (t))
if (TREE_ADDRESSABLE (TREE_TYPE (t)))
{
/* If a function's arguments are copied to create a thunk,
then DECL_BY_REFERENCE will be set -- but the type of the
argument will be a pointer type, so we will never get
here. */
gcc_assert (!DECL_BY_REFERENCE (t));
gcc_assert (DECL_ARG_TYPE (t) != TREE_TYPE (t));
TREE_TYPE (t) = DECL_ARG_TYPE (t);
DECL_BY_REFERENCE (t) = 1;
TREE_ADDRESSABLE (t) = 0;
relayout_decl (t);
}
/* Do the same for the return value. */
if (TREE_ADDRESSABLE (TREE_TYPE (DECL_RESULT (fndecl))))
{
t = DECL_RESULT (fndecl);
TREE_TYPE (t) = build_reference_type (TREE_TYPE (t));
DECL_BY_REFERENCE (t) = 1;
TREE_ADDRESSABLE (t) = 0;
relayout_decl (t);
if (DECL_NAME (t))
{
/* Adjust DECL_VALUE_EXPR of the original var. */
tree outer = outer_curly_brace_block (current_function_decl);
tree var;
if (outer)
for (var = BLOCK_VARS (outer); var; var = DECL_CHAIN (var))
if (DECL_NAME (t) == DECL_NAME (var)
&& DECL_HAS_VALUE_EXPR_P (var)
&& DECL_VALUE_EXPR (var) == t)
{
tree val = convert_from_reference (t);
SET_DECL_VALUE_EXPR (var, val);
break;
}
}
}
/* If we're a clone, the body is already GIMPLE. */
if (DECL_CLONED_FUNCTION_P (fndecl))
return;
/* We do want to see every occurrence of the parms, so we can't just use
walk_tree's hash functionality. */
wtd.p_set = pointer_set_create ();
wtd.bind_expr_stack = NULL;
cp_walk_tree (&DECL_SAVED_TREE (fndecl), cp_genericize_r, &wtd, NULL);
pointer_set_destroy (wtd.p_set);
VEC_free (tree, heap, wtd.bind_expr_stack);
/* Do everything else. */
gcc_genericize (fndecl);
gcc_assert (bc_label[bc_break] == NULL);
gcc_assert (bc_label[bc_continue] == NULL);
}
static tree
pop_binding (void)
{
tree res;
struct binding_level *cur;
cur = cur_binding_level;
res = cur->bind;
if (cur->save_stack)
{
tree tmp_var;
tree save;
tree save_call;
tree restore;
tree t;
/* Create an artificial var to save the stack pointer. */
/* build_decl got a new parameter
* http://www.mail-archive.com/[email protected]/msg01245.html
*/
tmp_var = build_decl (UNKNOWN_LOCATION, VAR_DECL, NULL, ptr_type_node);
DECL_ARTIFICIAL (tmp_var) = true;
DECL_IGNORED_P (tmp_var) = true;
TREE_USED (tmp_var) = true;
push_decl (tmp_var);
/*
* The functions
* build_function_call_expr
*
* were eliminated in newer versions of GCC. See
* http://patchwork.ozlabs.org/patch/57555/
* http://patchwork.ozlabs.org/patch/57906/
* http://patchwork.ozlabs.org/patch/57911/
* http://patchwork.ozlabs.org/patch/57962/
*
*
*/
/* Create the save stmt. */
/*
* build_function_call_expr was removed with patch 57962
* http://patchwork.ozlabs.org/patch/57962/
*
* The signature was
* build_function_call_expr (location_t loc, tree fndecl, tree arglist)
* A new function build_call_expr_loc_vec was introduced.
* See examples in the patch how to replace that function.
*/
save_call = build_call_expr_loc
(UNKNOWN_LOCATION,
implicit_built_in_decls[BUILT_IN_STACK_SAVE],
0);
save = build2 (MODIFY_EXPR, ptr_type_node, tmp_var, save_call);
TREE_SIDE_EFFECTS (save) = true;
/* Create the restore stmt. */
restore = build_call_expr_loc
(UNKNOWN_LOCATION,
implicit_built_in_decls[BUILT_IN_STACK_RESTORE],
1,
tmp_var);
/* Build a try-finally block.
The statement list is the block of current statements. */
t = build2 (TRY_FINALLY_EXPR, void_type_node, cur_stmts, NULL_TREE);
TREE_SIDE_EFFECTS (t) = true;
/* The finally block is the restore stmt. */
append_to_statement_list (restore, &TREE_OPERAND (t, 1));
/* The body of the BIND_BLOCK is the save stmt, followed by the
try block. */
BIND_EXPR_BODY (res) = NULL_TREE;
append_to_statement_list (save, &BIND_EXPR_BODY (res));
append_to_statement_list (t, &BIND_EXPR_BODY (res));
}
else
{
/* The body of the BIND_BLOCK is the statement block. */
BIND_EXPR_BODY (res) = cur_stmts;
}
BIND_EXPR_VARS (res) = cur->first_decl;
BLOCK_SUBBLOCKS (cur->block) = cur->first_block;
BLOCK_VARS (cur->block) = cur->first_decl;
cur_binding_level = cur->prev;
cur->prev = old_binding_levels;
old_binding_levels = cur;
return res;
}
static tree
pop_binding (void)
{
tree res;
struct binding_level *cur;
cur = cur_binding_level;
res = cur->bind;
if (cur->save_stack)
{
tree tmp_var;
tree save;
tree save_call;
tree restore;
tree t;
/* Create an artificial var to save the stack pointer. */
tmp_var = build_decl (input_location, VAR_DECL, NULL, ptr_type_node);
DECL_ARTIFICIAL (tmp_var) = true;
DECL_IGNORED_P (tmp_var) = true;
TREE_USED (tmp_var) = true;
pushdecl (tmp_var);
/* Create the save stmt. */
save_call = build_call_expr
(builtin_decl_implicit (BUILT_IN_STACK_SAVE), 0);
save = build2 (MODIFY_EXPR, ptr_type_node, tmp_var, save_call);
TREE_SIDE_EFFECTS (save) = true;
/* Create the restore stmt. */
restore = build_call_expr
(builtin_decl_implicit (BUILT_IN_STACK_RESTORE), 1, tmp_var);
/* Build a try-finally block.
The statement list is the block of current statements. */
t = build2 (TRY_FINALLY_EXPR, void_type_node, cur_stmts, NULL_TREE);
TREE_SIDE_EFFECTS (t) = true;
/* The finally block is the restore stmt. */
append_to_statement_list (restore, &TREE_OPERAND (t, 1));
/* The body of the BIND_BLOCK is the save stmt, followed by the
try block. */
BIND_EXPR_BODY (res) = NULL_TREE;
append_to_statement_list (save, &BIND_EXPR_BODY (res));
append_to_statement_list (t, &BIND_EXPR_BODY (res));
}
else
{
/* The body of the BIND_BLOCK is the statement block. */
BIND_EXPR_BODY (res) = cur_stmts;
}
BIND_EXPR_VARS (res) = cur->first_decl;
BLOCK_SUBBLOCKS (cur->block) = cur->first_block;
BLOCK_VARS (cur->block) = cur->first_decl;
/* Set current statements list and current binding. */
cur_stmts = cur->prev_stmts;
cur_binding_level = cur->prev;
/* Put removed binding to the recycle list. */
cur->prev = old_binding_levels;
old_binding_levels = cur;
return res;
}
void
browse_tree (tree begin)
{
tree head;
TB_CODE tbc = TB_UNUSED_COMMAND;
ssize_t rd;
char *input = NULL;
long input_size = 0;
fprintf (TB_OUT_FILE, "\nTree Browser\n");
#define TB_SET_HEAD(N) do { \
vec_safe_push (TB_history_stack, N); \
head = N; \
if (TB_verbose) \
if (head) \
{ \
print_generic_expr (TB_OUT_FILE, head, 0); \
fprintf (TB_OUT_FILE, "\n"); \
} \
} while (0)
TB_SET_HEAD (begin);
/* Store in a hashtable information about previous and upper statements. */
{
TB_up_ht = new hash_table<tree_upper_hasher> (1023);
TB_update_up (head);
}
while (24)
{
fprintf (TB_OUT_FILE, "TB> ");
rd = TB_getline (&input, &input_size, TB_IN_FILE);
if (rd == -1)
/* EOF. */
goto ret;
if (rd != 1)
/* Get a new command. Otherwise the user just pressed enter, and thus
she expects the last command to be reexecuted. */
tbc = TB_get_command (input);
switch (tbc)
{
case TB_UPDATE_UP:
TB_update_up (head);
break;
case TB_MAX:
if (head && (INTEGRAL_TYPE_P (head)
|| TREE_CODE (head) == REAL_TYPE
|| TREE_CODE (head) == FIXED_POINT_TYPE))
TB_SET_HEAD (TYPE_MAX_VALUE (head));
else
TB_WF;
break;
case TB_MIN:
if (head && (INTEGRAL_TYPE_P (head)
|| TREE_CODE (head) == REAL_TYPE
|| TREE_CODE (head) == FIXED_POINT_TYPE))
TB_SET_HEAD (TYPE_MIN_VALUE (head));
else
TB_WF;
break;
case TB_ELT:
if (head && TREE_CODE (head) == TREE_VEC)
{
/* This command takes another argument: the element number:
for example "elt 1". */
TB_NIY;
}
else if (head && TREE_CODE (head) == VECTOR_CST)
{
/* This command takes another argument: the element number:
for example "elt 1". */
TB_NIY;
}
else
TB_WF;
break;
case TB_VALUE:
if (head && TREE_CODE (head) == TREE_LIST)
TB_SET_HEAD (TREE_VALUE (head));
else
TB_WF;
break;
case TB_PURPOSE:
if (head && TREE_CODE (head) == TREE_LIST)
TB_SET_HEAD (TREE_PURPOSE (head));
else
TB_WF;
break;
case TB_IMAG:
if (head && TREE_CODE (head) == COMPLEX_CST)
TB_SET_HEAD (TREE_IMAGPART (head));
else
TB_WF;
break;
case TB_REAL:
if (head && TREE_CODE (head) == COMPLEX_CST)
TB_SET_HEAD (TREE_REALPART (head));
else
TB_WF;
break;
case TB_BLOCK:
if (head && TREE_CODE (head) == BIND_EXPR)
TB_SET_HEAD (TREE_OPERAND (head, 2));
else
TB_WF;
break;
case TB_SUBBLOCKS:
if (head && TREE_CODE (head) == BLOCK)
TB_SET_HEAD (BLOCK_SUBBLOCKS (head));
else
TB_WF;
break;
case TB_SUPERCONTEXT:
if (head && TREE_CODE (head) == BLOCK)
TB_SET_HEAD (BLOCK_SUPERCONTEXT (head));
else
TB_WF;
break;
case TB_VARS:
if (head && TREE_CODE (head) == BLOCK)
TB_SET_HEAD (BLOCK_VARS (head));
else if (head && TREE_CODE (head) == BIND_EXPR)
TB_SET_HEAD (TREE_OPERAND (head, 0));
else
TB_WF;
break;
case TB_REFERENCE_TO_THIS:
if (head && TYPE_P (head))
TB_SET_HEAD (TYPE_REFERENCE_TO (head));
else
TB_WF;
break;
case TB_POINTER_TO_THIS:
if (head && TYPE_P (head))
TB_SET_HEAD (TYPE_POINTER_TO (head));
else
TB_WF;
break;
case TB_BASETYPE:
if (head && TREE_CODE (head) == OFFSET_TYPE)
TB_SET_HEAD (TYPE_OFFSET_BASETYPE (head));
else
TB_WF;
break;
case TB_ARG_TYPES:
if (head && (TREE_CODE (head) == FUNCTION_TYPE
|| TREE_CODE (head) == METHOD_TYPE))
TB_SET_HEAD (TYPE_ARG_TYPES (head));
else
TB_WF;
break;
case TB_METHOD_BASE_TYPE:
if (head && (TREE_CODE (head) == FUNCTION_TYPE
|| TREE_CODE (head) == METHOD_TYPE)
&& TYPE_METHOD_BASETYPE (head))
TB_SET_HEAD (TYPE_METHOD_BASETYPE (head));
else
TB_WF;
break;
case TB_FIELDS:
if (head && (TREE_CODE (head) == RECORD_TYPE
|| TREE_CODE (head) == UNION_TYPE
|| TREE_CODE (head) == QUAL_UNION_TYPE))
TB_SET_HEAD (TYPE_FIELDS (head));
else
TB_WF;
break;
case TB_DOMAIN:
if (head && TREE_CODE (head) == ARRAY_TYPE)
TB_SET_HEAD (TYPE_DOMAIN (head));
else
TB_WF;
break;
case TB_VALUES:
if (head && TREE_CODE (head) == ENUMERAL_TYPE)
TB_SET_HEAD (TYPE_VALUES (head));
else
TB_WF;
break;
case TB_ARG_TYPE:
if (head && TREE_CODE (head) == PARM_DECL)
TB_SET_HEAD (DECL_ARG_TYPE (head));
else
TB_WF;
break;
case TB_INITIAL:
if (head && DECL_P (head))
TB_SET_HEAD (DECL_INITIAL (head));
else
TB_WF;
break;
case TB_RESULT:
if (head && DECL_P (head))
TB_SET_HEAD (DECL_RESULT_FLD (head));
else
TB_WF;
break;
case TB_ARGUMENTS:
if (head && DECL_P (head))
TB_SET_HEAD (DECL_ARGUMENTS (head));
else
TB_WF;
break;
case TB_ABSTRACT_ORIGIN:
if (head && DECL_P (head))
TB_SET_HEAD (DECL_ABSTRACT_ORIGIN (head));
else if (head && TREE_CODE (head) == BLOCK)
TB_SET_HEAD (BLOCK_ABSTRACT_ORIGIN (head));
else
TB_WF;
break;
case TB_ATTRIBUTES:
if (head && DECL_P (head))
TB_SET_HEAD (DECL_ATTRIBUTES (head));
else if (head && TYPE_P (head))
TB_SET_HEAD (TYPE_ATTRIBUTES (head));
else
TB_WF;
break;
case TB_CONTEXT:
if (head && DECL_P (head))
TB_SET_HEAD (DECL_CONTEXT (head));
else if (head && TYPE_P (head)
&& TYPE_CONTEXT (head))
TB_SET_HEAD (TYPE_CONTEXT (head));
else
TB_WF;
break;
case TB_OFFSET:
if (head && TREE_CODE (head) == FIELD_DECL)
TB_SET_HEAD (DECL_FIELD_OFFSET (head));
else
TB_WF;
break;
case TB_BIT_OFFSET:
if (head && TREE_CODE (head) == FIELD_DECL)
TB_SET_HEAD (DECL_FIELD_BIT_OFFSET (head));
else
TB_WF;
break;
case TB_UNIT_SIZE:
if (head && DECL_P (head))
TB_SET_HEAD (DECL_SIZE_UNIT (head));
else if (head && TYPE_P (head))
TB_SET_HEAD (TYPE_SIZE_UNIT (head));
else
TB_WF;
break;
case TB_SIZE:
if (head && DECL_P (head))
TB_SET_HEAD (DECL_SIZE (head));
else if (head && TYPE_P (head))
TB_SET_HEAD (TYPE_SIZE (head));
else
TB_WF;
break;
case TB_TYPE:
if (head && TREE_TYPE (head))
TB_SET_HEAD (TREE_TYPE (head));
else
TB_WF;
break;
case TB_DECL_SAVED_TREE:
if (head && TREE_CODE (head) == FUNCTION_DECL
&& DECL_SAVED_TREE (head))
TB_SET_HEAD (DECL_SAVED_TREE (head));
else
TB_WF;
break;
case TB_BODY:
if (head && TREE_CODE (head) == BIND_EXPR)
TB_SET_HEAD (TREE_OPERAND (head, 1));
else
TB_WF;
break;
case TB_CHILD_0:
if (head && EXPR_P (head) && TREE_OPERAND (head, 0))
TB_SET_HEAD (TREE_OPERAND (head, 0));
else
TB_WF;
break;
case TB_CHILD_1:
if (head && EXPR_P (head) && TREE_OPERAND (head, 1))
TB_SET_HEAD (TREE_OPERAND (head, 1));
else
TB_WF;
break;
case TB_CHILD_2:
if (head && EXPR_P (head) && TREE_OPERAND (head, 2))
TB_SET_HEAD (TREE_OPERAND (head, 2));
else
TB_WF;
break;
case TB_CHILD_3:
if (head && EXPR_P (head) && TREE_OPERAND (head, 3))
TB_SET_HEAD (TREE_OPERAND (head, 3));
else
TB_WF;
break;
case TB_PRINT:
if (head)
debug_tree (head);
else
TB_WF;
break;
case TB_PRETTY_PRINT:
if (head)
{
print_generic_stmt (TB_OUT_FILE, head, 0);
fprintf (TB_OUT_FILE, "\n");
}
else
TB_WF;
break;
case TB_SEARCH_NAME:
break;
case TB_SEARCH_CODE:
{
enum tree_code code;
char *arg_text;
arg_text = strchr (input, ' ');
if (arg_text == NULL)
{
fprintf (TB_OUT_FILE, "First argument is missing. This isn't a valid search command. \n");
break;
}
code = TB_get_tree_code (arg_text + 1);
/* Search in the subtree a node with the given code. */
{
tree res;
res = walk_tree (&head, find_node_with_code, &code, NULL);
if (res == NULL_TREE)
{
fprintf (TB_OUT_FILE, "There's no node with this code (reachable via the walk_tree function from this node).\n");
}
else
{
fprintf (TB_OUT_FILE, "Achoo! I got this node in the tree.\n");
TB_SET_HEAD (res);
}
}
break;
}
#define TB_MOVE_HEAD(FCT) do { \
if (head) \
{ \
tree t; \
t = FCT (head); \
if (t) \
TB_SET_HEAD (t); \
else \
TB_WF; \
} \
else \
TB_WF; \
} while (0)
case TB_FIRST:
TB_MOVE_HEAD (TB_first_in_bind);
break;
case TB_LAST:
TB_MOVE_HEAD (TB_last_in_bind);
break;
case TB_UP:
TB_MOVE_HEAD (TB_up_expr);
break;
case TB_PREV:
TB_MOVE_HEAD (TB_prev_expr);
break;
case TB_NEXT:
TB_MOVE_HEAD (TB_next_expr);
break;
case TB_HPREV:
/* This command is a little bit special, since it deals with history
stack. For this reason it should keep the "head = ..." statement
and not use TB_MOVE_HEAD. */
if (head)
{
tree t;
t = TB_history_prev ();
if (t)
{
head = t;
if (TB_verbose)
{
print_generic_expr (TB_OUT_FILE, head, 0);
fprintf (TB_OUT_FILE, "\n");
}
}
else
TB_WF;
}
else
TB_WF;
break;
case TB_CHAIN:
/* Don't go further if it's the last node in this chain. */
if (head && TREE_CODE (head) == BLOCK)
TB_SET_HEAD (BLOCK_CHAIN (head));
else if (head && TREE_CHAIN (head))
TB_SET_HEAD (TREE_CHAIN (head));
else
TB_WF;
break;
case TB_FUN:
/* Go up to the current function declaration. */
TB_SET_HEAD (current_function_decl);
fprintf (TB_OUT_FILE, "Current function declaration.\n");
break;
case TB_HELP:
/* Display a help message. */
{
int i;
fprintf (TB_OUT_FILE, "Possible commands are:\n\n");
for (i = 0; i < TB_UNUSED_COMMAND; i++)
{
fprintf (TB_OUT_FILE, "%20s - %s\n", TB_COMMAND_TEXT (i), TB_COMMAND_HELP (i));
}
}
break;
case TB_VERBOSE:
if (TB_verbose == 0)
{
TB_verbose = 1;
fprintf (TB_OUT_FILE, "Verbose on.\n");
}
else
{
TB_verbose = 0;
fprintf (TB_OUT_FILE, "Verbose off.\n");
}
break;
case TB_EXIT:
case TB_QUIT:
/* Just exit from this function. */
goto ret;
default:
TB_NIY;
}
}
ret:;
delete TB_up_ht;
TB_up_ht = NULL;
return;
}
int
cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
int saved_stmts_are_full_exprs_p = 0;
enum tree_code code = TREE_CODE (*expr_p);
enum gimplify_status ret;
tree block = NULL;
VEC(gimple, heap) *bind_expr_stack = NULL;
if (STATEMENT_CODE_P (code))
{
saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
current_stmt_tree ()->stmts_are_full_exprs_p
= STMT_IS_FULL_EXPR_P (*expr_p);
}
switch (code)
{
case PTRMEM_CST:
*expr_p = cplus_expand_constant (*expr_p);
ret = GS_OK;
break;
case AGGR_INIT_EXPR:
simplify_aggr_init_expr (expr_p);
ret = GS_OK;
break;
case THROW_EXPR:
/* FIXME communicate throw type to back end, probably by moving
THROW_EXPR into ../tree.def. */
*expr_p = TREE_OPERAND (*expr_p, 0);
ret = GS_OK;
break;
case MUST_NOT_THROW_EXPR:
ret = gimplify_must_not_throw_expr (expr_p, pre_p);
break;
/* We used to do this for MODIFY_EXPR as well, but that's unsafe; the
LHS of an assignment might also be involved in the RHS, as in bug
25979. */
case INIT_EXPR:
cp_gimplify_init_expr (expr_p, pre_p, post_p);
ret = GS_OK;
break;
case EMPTY_CLASS_EXPR:
/* We create an empty CONSTRUCTOR with RECORD_TYPE. */
*expr_p = build_constructor (TREE_TYPE (*expr_p), NULL);
ret = GS_OK;
break;
case BASELINK:
*expr_p = BASELINK_FUNCTIONS (*expr_p);
ret = GS_OK;
break;
case TRY_BLOCK:
genericize_try_block (expr_p);
ret = GS_OK;
break;
case HANDLER:
genericize_catch_block (expr_p);
ret = GS_OK;
break;
case EH_SPEC_BLOCK:
genericize_eh_spec_block (expr_p);
ret = GS_OK;
break;
case USING_STMT:
/* Get the innermost inclosing GIMPLE_BIND that has a non NULL
BLOCK, and append an IMPORTED_DECL to its
BLOCK_VARS chained list. */
bind_expr_stack = gimple_bind_expr_stack ();
if (bind_expr_stack)
{
int i;
for (i = VEC_length (gimple, bind_expr_stack) - 1; i >= 0; i--)
if ((block = gimple_bind_block (VEC_index (gimple,
bind_expr_stack,
i))))
break;
}
if (block)
{
tree using_directive;
gcc_assert (TREE_OPERAND (*expr_p, 0));
using_directive = make_node (IMPORTED_DECL);
TREE_TYPE (using_directive) = void_type_node;
IMPORTED_DECL_ASSOCIATED_DECL (using_directive)
= TREE_OPERAND (*expr_p, 0);
TREE_CHAIN (using_directive) = BLOCK_VARS (block);
BLOCK_VARS (block) = using_directive;
}
/* The USING_STMT won't appear in GIMPLE. */
*expr_p = NULL;
ret = GS_ALL_DONE;
break;
case FOR_STMT:
gimplify_for_stmt (expr_p, pre_p);
ret = GS_OK;
break;
case WHILE_STMT:
gimplify_while_stmt (expr_p, pre_p);
ret = GS_OK;
break;
case DO_STMT:
gimplify_do_stmt (expr_p, pre_p);
ret = GS_OK;
break;
case SWITCH_STMT:
gimplify_switch_stmt (expr_p, pre_p);
ret = GS_OK;
break;
case OMP_FOR:
ret = cp_gimplify_omp_for (expr_p, pre_p);
break;
case CONTINUE_STMT:
gimple_seq_add_stmt (pre_p, gimple_build_predict (PRED_CONTINUE, NOT_TAKEN));
gimple_seq_add_stmt (pre_p, gimple_build_goto (get_bc_label (bc_continue)));
*expr_p = NULL_TREE;
ret = GS_ALL_DONE;
break;
case BREAK_STMT:
gimple_seq_add_stmt (pre_p, gimple_build_goto (get_bc_label (bc_break)));
*expr_p = NULL_TREE;
ret = GS_ALL_DONE;
break;
case EXPR_STMT:
gimplify_expr_stmt (expr_p);
ret = GS_OK;
break;
case UNARY_PLUS_EXPR:
{
tree arg = TREE_OPERAND (*expr_p, 0);
tree type = TREE_TYPE (*expr_p);
*expr_p = (TREE_TYPE (arg) != type) ? fold_convert (type, arg)
: arg;
ret = GS_OK;
}
break;
default:
ret = c_gimplify_expr (expr_p, pre_p, post_p);
break;
}
/* Restore saved state. */
if (STATEMENT_CODE_P (code))
current_stmt_tree ()->stmts_are_full_exprs_p
= saved_stmts_are_full_exprs_p;
return ret;
}
static void
lower_gimple_bind (gimple_stmt_iterator *gsi, struct lower_data *data)
{
tree old_block = data->block;
gbind *stmt = as_a <gbind *> (gsi_stmt (*gsi));
tree new_block = gimple_bind_block (stmt);
if (new_block)
{
if (new_block == old_block)
{
/* The outermost block of the original function may not be the
outermost statement chain of the gimplified function. So we
may see the outermost block just inside the function. */
gcc_assert (new_block == DECL_INITIAL (current_function_decl));
new_block = NULL;
}
else
{
/* We do not expect to handle duplicate blocks. */
gcc_assert (!TREE_ASM_WRITTEN (new_block));
TREE_ASM_WRITTEN (new_block) = 1;
/* Block tree may get clobbered by inlining. Normally this would
be fixed in rest_of_decl_compilation using block notes, but
since we are not going to emit them, it is up to us. */
BLOCK_CHAIN (new_block) = BLOCK_SUBBLOCKS (old_block);
BLOCK_SUBBLOCKS (old_block) = new_block;
BLOCK_SUBBLOCKS (new_block) = NULL_TREE;
BLOCK_SUPERCONTEXT (new_block) = old_block;
data->block = new_block;
}
}
record_vars (gimple_bind_vars (stmt));
/* Scrap DECL_CHAIN up to BLOCK_VARS to ease GC after we no longer
need gimple_bind_vars. */
tree next;
/* BLOCK_VARS and gimple_bind_vars share a common sub-chain. Find
it by marking all BLOCK_VARS. */
if (gimple_bind_block (stmt))
for (tree t = BLOCK_VARS (gimple_bind_block (stmt)); t; t = DECL_CHAIN (t))
TREE_VISITED (t) = 1;
for (tree var = gimple_bind_vars (stmt);
var && ! TREE_VISITED (var); var = next)
{
next = DECL_CHAIN (var);
DECL_CHAIN (var) = NULL_TREE;
}
/* Unmark BLOCK_VARS. */
if (gimple_bind_block (stmt))
for (tree t = BLOCK_VARS (gimple_bind_block (stmt)); t; t = DECL_CHAIN (t))
TREE_VISITED (t) = 0;
lower_sequence (gimple_bind_body_ptr (stmt), data);
if (new_block)
{
gcc_assert (data->block == new_block);
BLOCK_SUBBLOCKS (new_block)
= blocks_nreverse (BLOCK_SUBBLOCKS (new_block));
data->block = old_block;
}
/* The GIMPLE_BIND no longer carries any useful information -- kill it. */
gsi_insert_seq_before (gsi, gimple_bind_body (stmt), GSI_SAME_STMT);
gsi_remove (gsi, false);
}
void
use_thunk (tree thunk_fndecl, bool emit_p)
{
tree a, t, function, alias;
tree virtual_offset;
HOST_WIDE_INT fixed_offset, virtual_value;
bool this_adjusting = DECL_THIS_THUNK_P (thunk_fndecl);
/* We should have called finish_thunk to give it a name. */
gcc_assert (DECL_NAME (thunk_fndecl));
/* We should never be using an alias, always refer to the
aliased thunk. */
gcc_assert (!THUNK_ALIAS (thunk_fndecl));
if (TREE_ASM_WRITTEN (thunk_fndecl))
return;
function = THUNK_TARGET (thunk_fndecl);
if (DECL_RESULT (thunk_fndecl))
/* We already turned this thunk into an ordinary function.
There's no need to process this thunk again. */
return;
if (DECL_THUNK_P (function))
/* The target is itself a thunk, process it now. */
use_thunk (function, emit_p);
/* Thunks are always addressable; they only appear in vtables. */
TREE_ADDRESSABLE (thunk_fndecl) = 1;
/* Figure out what function is being thunked to. It's referenced in
this translation unit. */
TREE_ADDRESSABLE (function) = 1;
mark_used (function);
if (!emit_p)
return;
if (TARGET_USE_LOCAL_THUNK_ALIAS_P (function))
alias = make_alias_for_thunk (function);
else
alias = function;
fixed_offset = THUNK_FIXED_OFFSET (thunk_fndecl);
virtual_offset = THUNK_VIRTUAL_OFFSET (thunk_fndecl);
if (virtual_offset)
{
if (!this_adjusting)
virtual_offset = BINFO_VPTR_FIELD (virtual_offset);
virtual_value = tree_low_cst (virtual_offset, /*pos=*/0);
gcc_assert (virtual_value);
}
else
virtual_value = 0;
/* And, if we need to emit the thunk, it's used. */
mark_used (thunk_fndecl);
/* This thunk is actually defined. */
DECL_EXTERNAL (thunk_fndecl) = 0;
/* The linkage of the function may have changed. FIXME in linkage
rewrite. */
TREE_PUBLIC (thunk_fndecl) = TREE_PUBLIC (function);
DECL_VISIBILITY (thunk_fndecl) = DECL_VISIBILITY (function);
DECL_VISIBILITY_SPECIFIED (thunk_fndecl)
= DECL_VISIBILITY_SPECIFIED (function);
if (DECL_ONE_ONLY (function))
make_decl_one_only (thunk_fndecl);
if (flag_syntax_only)
{
TREE_ASM_WRITTEN (thunk_fndecl) = 1;
return;
}
push_to_top_level ();
if (TARGET_USE_LOCAL_THUNK_ALIAS_P (function)
&& targetm.have_named_sections)
{
resolve_unique_section (function, 0, flag_function_sections);
if (DECL_SECTION_NAME (function) != NULL && DECL_ONE_ONLY (function))
{
resolve_unique_section (thunk_fndecl, 0, flag_function_sections);
/* Output the thunk into the same section as function. */
DECL_SECTION_NAME (thunk_fndecl) = DECL_SECTION_NAME (function);
}
}
/* The back-end expects DECL_INITIAL to contain a BLOCK, so we
create one. */
DECL_INITIAL (thunk_fndecl) = make_node (BLOCK);
/* Set up cloned argument trees for the thunk. */
t = NULL_TREE;
for (a = DECL_ARGUMENTS (function); a; a = TREE_CHAIN (a))
{
tree x = copy_node (a);
TREE_CHAIN (x) = t;
DECL_CONTEXT (x) = thunk_fndecl;
SET_DECL_RTL (x, NULL_RTX);
DECL_HAS_VALUE_EXPR_P (x) = 0;
t = x;
}
a = nreverse (t);
DECL_ARGUMENTS (thunk_fndecl) = a;
BLOCK_VARS (DECL_INITIAL (thunk_fndecl)) = a;
if (this_adjusting
&& targetm.asm_out.can_output_mi_thunk (thunk_fndecl, fixed_offset,
virtual_value, alias))
{
const char *fnname;
current_function_decl = thunk_fndecl;
DECL_RESULT (thunk_fndecl)
= build_decl (RESULT_DECL, 0, integer_type_node);
fnname = XSTR (XEXP (DECL_RTL (thunk_fndecl), 0), 0);
init_function_start (thunk_fndecl);
current_function_is_thunk = 1;
assemble_start_function (thunk_fndecl, fnname);
targetm.asm_out.output_mi_thunk (asm_out_file, thunk_fndecl,
fixed_offset, virtual_value, alias);
assemble_end_function (thunk_fndecl, fnname);
init_insn_lengths ();
current_function_decl = 0;
cfun = 0;
TREE_ASM_WRITTEN (thunk_fndecl) = 1;
}
else
{
/* If this is a covariant thunk, or we don't have the necessary
code for efficient thunks, generate a thunk function that
just makes a call to the real function. Unfortunately, this
doesn't work for varargs. */
if (varargs_function_p (function))
error ("generic thunk code fails for method %q#D which uses %<...%>",
function);
DECL_RESULT (thunk_fndecl) = NULL_TREE;
start_preparsed_function (thunk_fndecl, NULL_TREE, SF_PRE_PARSED);
/* We don't bother with a body block for thunks. */
/* There's no need to check accessibility inside the thunk body. */
push_deferring_access_checks (dk_no_check);
t = a;
if (this_adjusting)
t = thunk_adjust (t, /*this_adjusting=*/1,
fixed_offset, virtual_offset);
/* Build up the call to the real function. */
t = tree_cons (NULL_TREE, t, NULL_TREE);
for (a = TREE_CHAIN (a); a; a = TREE_CHAIN (a))
t = tree_cons (NULL_TREE, a, t);
t = nreverse (t);
t = build_call (alias, t);
CALL_FROM_THUNK_P (t) = 1;
if (VOID_TYPE_P (TREE_TYPE (t)))
finish_expr_stmt (t);
else
{
if (!this_adjusting)
{
tree cond = NULL_TREE;
if (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE)
{
/* If the return type is a pointer, we need to
protect against NULL. We know there will be an
adjustment, because that's why we're emitting a
thunk. */
t = save_expr (t);
cond = cp_convert (boolean_type_node, t);
}
t = thunk_adjust (t, /*this_adjusting=*/0,
fixed_offset, virtual_offset);
if (cond)
t = build3 (COND_EXPR, TREE_TYPE (t), cond, t,
cp_convert (TREE_TYPE (t), integer_zero_node));
}
if (IS_AGGR_TYPE (TREE_TYPE (t)))
t = build_cplus_new (TREE_TYPE (t), t);
finish_return_stmt (t);
}
/* Since we want to emit the thunk, we explicitly mark its name as
referenced. */
mark_decl_referenced (thunk_fndecl);
/* But we don't want debugging information about it. */
DECL_IGNORED_P (thunk_fndecl) = 1;
/* Re-enable access control. */
pop_deferring_access_checks ();
thunk_fndecl = finish_function (0);
tree_lowering_passes (thunk_fndecl);
expand_body (thunk_fndecl);
}
pop_from_top_level ();
}
/* FN is a constructor or destructor, and there are FUNCTION_DECLs
cloned from it nearby. Instead of cloning this body, leave it
alone and create tiny one-call bodies for the cloned
FUNCTION_DECLs. These clones are sibcall candidates, and their
resulting code will be very thunk-esque. */
static void
thunk_body (tree clone, tree fn, tree clone_to_call)
{
tree bind, block, call, fn_parm, fn_parm_typelist;
int parmno, vtt_parmno;
tree clone_parm, parmlist;
for (vtt_parmno = -1, parmno = 0, fn_parm = DECL_ARGUMENTS (fn);
fn_parm;
++parmno, fn_parm = TREE_CHAIN (fn_parm))
{
if (DECL_ARTIFICIAL (fn_parm) && DECL_NAME (fn_parm) == vtt_parm_identifier)
{
vtt_parmno = parmno; /* Compensate for removed in_charge parameter. */
break;
}
}
/* Currently, we are not supposed to have a vtt argument. */
gcc_assert(vtt_parmno == -1);
/* Walk parameter lists together, creating parameter list for call to original function. */
for (parmno = 0,
parmlist = NULL,
fn_parm = DECL_ARGUMENTS (fn),
fn_parm_typelist = TYPE_ARG_TYPES (TREE_TYPE (fn)),
clone_parm = DECL_ARGUMENTS (clone);
fn_parm;
++parmno,
fn_parm = TREE_CHAIN (fn_parm))
{
if (parmno == vtt_parmno && ! DECL_HAS_VTT_PARM_P (clone))
{
tree typed_null_pointer_node = copy_node (null_pointer_node);
gcc_assert (fn_parm_typelist);
/* Clobber actual parameter with formal parameter type. */
TREE_TYPE (typed_null_pointer_node) = TREE_VALUE (fn_parm_typelist);
parmlist = tree_cons (NULL, typed_null_pointer_node, parmlist);
}
else if (parmno == 1 && DECL_HAS_IN_CHARGE_PARM_P (fn))
{
/* Just skip it. */
}
/* Map other parameters to their equivalents in the cloned
function. */
else
{
gcc_assert (clone_parm);
DECL_ABSTRACT_ORIGIN (clone_parm) = NULL;
parmlist = tree_cons (NULL, clone_parm, parmlist);
clone_parm = TREE_CHAIN (clone_parm);
}
if (fn_parm_typelist)
fn_parm_typelist = TREE_CHAIN (fn_parm_typelist);
}
/* We built this list backwards; fix now. */
parmlist = nreverse (parmlist);
TREE_USED (clone_to_call) = 1;
call = build_cxx_call (clone_to_call, parmlist);
for (parmlist = TREE_OPERAND (call, 1); parmlist; parmlist = TREE_CHAIN (parmlist))
{
fn_parm = TREE_VALUE (parmlist);
/* Remove the EMPTY_CLASS_EXPR because it upsets estimate_num_insns(). */
if (TREE_CODE (fn_parm) == COMPOUND_EXPR)
{
gcc_assert (TREE_CODE (TREE_OPERAND (fn_parm, 1)) == EMPTY_CLASS_EXPR);
TREE_VALUE (parmlist) = TREE_OPERAND (fn_parm, 0);
}
}
block = make_node (BLOCK);
if (targetm.cxx.cdtor_returns_this ())
{
tree clone_result = DECL_RESULT (clone);
tree modify = build2 (MODIFY_EXPR, TREE_TYPE (clone_result), clone_result, call);
add_stmt (modify);
BLOCK_VARS (block) = clone_result;
}
else
{
add_stmt (call);
}
bind = c_build_bind_expr (block, cur_stmt_list);
DECL_SAVED_TREE (clone) = push_stmt_list ();
add_stmt (bind);
}
