static void
lower_stmt (gimple_stmt_iterator *gsi, struct lower_data *data)
{
gimple stmt = gsi_stmt (*gsi);
gimple_set_block (stmt, data->block);
switch (gimple_code (stmt))
{
case GIMPLE_BIND:
lower_gimple_bind (gsi, data);
/* Propagate fallthruness. */
return;
case GIMPLE_COND:
case GIMPLE_GOTO:
case GIMPLE_SWITCH:
data->cannot_fallthru = true;
gsi_next (gsi);
return;
case GIMPLE_RETURN:
if (data->cannot_fallthru)
{
gsi_remove (gsi, false);
/* Propagate fallthruness. */
}
else
{
lower_gimple_return (gsi, data);
data->cannot_fallthru = true;
}
return;
case GIMPLE_TRY:
if (gimple_try_kind (stmt) == GIMPLE_TRY_CATCH)
lower_try_catch (gsi, data);
else
{
/* It must be a GIMPLE_TRY_FINALLY. */
bool cannot_fallthru;
lower_sequence (gimple_try_eval_ptr (stmt), data);
cannot_fallthru = data->cannot_fallthru;
/* The finally clause is always executed after the try clause,
so if it does not fall through, then the try-finally will not
fall through. Otherwise, if the try clause does not fall
through, then when the finally clause falls through it will
resume execution wherever the try clause was going. So the
whole try-finally will only fall through if both the try
clause and the finally clause fall through. */
data->cannot_fallthru = false;
lower_sequence (gimple_try_cleanup_ptr (stmt), data);
data->cannot_fallthru |= cannot_fallthru;
gsi_next (gsi);
}
return;
case GIMPLE_EH_ELSE:
lower_sequence (gimple_eh_else_n_body_ptr (stmt), data);
lower_sequence (gimple_eh_else_e_body_ptr (stmt), data);
break;
case GIMPLE_NOP:
case GIMPLE_ASM:
case GIMPLE_ASSIGN:
case GIMPLE_PREDICT:
case GIMPLE_LABEL:
case GIMPLE_EH_MUST_NOT_THROW:
case GIMPLE_OMP_FOR:
case GIMPLE_OMP_SECTIONS:
case GIMPLE_OMP_SECTIONS_SWITCH:
case GIMPLE_OMP_SECTION:
case GIMPLE_OMP_SINGLE:
case GIMPLE_OMP_MASTER:
case GIMPLE_OMP_ORDERED:
case GIMPLE_OMP_CRITICAL:
case GIMPLE_OMP_RETURN:
case GIMPLE_OMP_ATOMIC_LOAD:
case GIMPLE_OMP_ATOMIC_STORE:
case GIMPLE_OMP_CONTINUE:
break;
case GIMPLE_CALL:
{
tree decl = gimple_call_fndecl (stmt);
unsigned i;
for (i = 0; i < gimple_call_num_args (stmt); i++)
{
tree arg = gimple_call_arg (stmt, i);
if (EXPR_P (arg))
TREE_SET_BLOCK (arg, data->block);
}
if (decl
&& DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL
&& DECL_FUNCTION_CODE (decl) == BUILT_IN_SETJMP)
{
lower_builtin_setjmp (gsi);
data->cannot_fallthru = false;
data->calls_builtin_setjmp = true;
return;
}
if (decl && (flags_from_decl_or_type (decl) & ECF_NORETURN))
{
data->cannot_fallthru = true;
gsi_next (gsi);
return;
}
}
break;
case GIMPLE_OMP_PARALLEL:
case GIMPLE_OMP_TASK:
data->cannot_fallthru = false;
lower_omp_directive (gsi, data);
data->cannot_fallthru = false;
return;
case GIMPLE_TRANSACTION:
lower_sequence (gimple_transaction_body_ptr (stmt), data);
break;
default:
gcc_unreachable ();
}
data->cannot_fallthru = false;
gsi_next (gsi);
}
static void
lower_stmt (gimple_stmt_iterator *gsi, struct lower_data *data)
{
gimple *stmt = gsi_stmt (*gsi);
gimple_set_block (stmt, data->block);
switch (gimple_code (stmt))
{
case GIMPLE_BIND:
lower_gimple_bind (gsi, data);
/* Propagate fallthruness. */
return;
case GIMPLE_COND:
case GIMPLE_GOTO:
case GIMPLE_SWITCH:
data->cannot_fallthru = true;
gsi_next (gsi);
return;
case GIMPLE_RETURN:
if (data->cannot_fallthru)
{
gsi_remove (gsi, false);
/* Propagate fallthruness. */
}
else
{
lower_gimple_return (gsi, data);
data->cannot_fallthru = true;
}
return;
case GIMPLE_TRY:
if (gimple_try_kind (stmt) == GIMPLE_TRY_CATCH)
lower_try_catch (gsi, data);
else
{
/* It must be a GIMPLE_TRY_FINALLY. */
bool cannot_fallthru;
lower_sequence (gimple_try_eval_ptr (stmt), data);
cannot_fallthru = data->cannot_fallthru;
/* The finally clause is always executed after the try clause,
so if it does not fall through, then the try-finally will not
fall through. Otherwise, if the try clause does not fall
through, then when the finally clause falls through it will
resume execution wherever the try clause was going. So the
whole try-finally will only fall through if both the try
clause and the finally clause fall through. */
data->cannot_fallthru = false;
lower_sequence (gimple_try_cleanup_ptr (stmt), data);
data->cannot_fallthru |= cannot_fallthru;
gsi_next (gsi);
}
return;
case GIMPLE_EH_ELSE:
{
geh_else *eh_else_stmt = as_a <geh_else *> (stmt);
lower_sequence (gimple_eh_else_n_body_ptr (eh_else_stmt), data);
lower_sequence (gimple_eh_else_e_body_ptr (eh_else_stmt), data);
}
break;
case GIMPLE_DEBUG:
gcc_checking_assert (cfun->debug_nonbind_markers);
/* We can't possibly have debug bind stmts before lowering, we
first emit them when entering SSA. */
gcc_checking_assert (gimple_debug_nonbind_marker_p (stmt));
/* Propagate fallthruness. */
/* If the function (e.g. from PCH) had debug stmts, but they're
disabled for this compilation, remove them. */
if (!MAY_HAVE_DEBUG_MARKER_STMTS)
gsi_remove (gsi, true);
else
gsi_next (gsi);
return;
case GIMPLE_NOP:
case GIMPLE_ASM:
case GIMPLE_ASSIGN:
case GIMPLE_PREDICT:
case GIMPLE_LABEL:
case GIMPLE_EH_MUST_NOT_THROW:
case GIMPLE_OMP_FOR:
case GIMPLE_OMP_SECTIONS:
case GIMPLE_OMP_SECTIONS_SWITCH:
case GIMPLE_OMP_SECTION:
case GIMPLE_OMP_SINGLE:
case GIMPLE_OMP_MASTER:
case GIMPLE_OMP_TASKGROUP:
case GIMPLE_OMP_ORDERED:
case GIMPLE_OMP_CRITICAL:
case GIMPLE_OMP_RETURN:
case GIMPLE_OMP_ATOMIC_LOAD:
case GIMPLE_OMP_ATOMIC_STORE:
case GIMPLE_OMP_CONTINUE:
break;
case GIMPLE_CALL:
{
tree decl = gimple_call_fndecl (stmt);
unsigned i;
for (i = 0; i < gimple_call_num_args (stmt); i++)
{
tree arg = gimple_call_arg (stmt, i);
if (EXPR_P (arg))
TREE_SET_BLOCK (arg, data->block);
}
if (decl
&& DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
{
if (DECL_FUNCTION_CODE (decl) == BUILT_IN_SETJMP)
{
lower_builtin_setjmp (gsi);
data->cannot_fallthru = false;
return;
}
else if (DECL_FUNCTION_CODE (decl) == BUILT_IN_POSIX_MEMALIGN
&& flag_tree_bit_ccp
&& gimple_builtin_call_types_compatible_p (stmt, decl))
{
lower_builtin_posix_memalign (gsi);
return;
}
}
if (decl && (flags_from_decl_or_type (decl) & ECF_NORETURN))
{
data->cannot_fallthru = true;
gsi_next (gsi);
return;
}
}
break;
case GIMPLE_OMP_PARALLEL:
case GIMPLE_OMP_TASK:
case GIMPLE_OMP_TARGET:
case GIMPLE_OMP_TEAMS:
case GIMPLE_OMP_GRID_BODY:
data->cannot_fallthru = false;
lower_omp_directive (gsi, data);
data->cannot_fallthru = false;
return;
case GIMPLE_TRANSACTION:
lower_sequence (gimple_transaction_body_ptr (
as_a <gtransaction *> (stmt)),
data);
break;
default:
gcc_unreachable ();
}
data->cannot_fallthru = false;
gsi_next (gsi);
}
