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#include "gimple-rewriter.hpp"
void
GimpleTypeRewriter::_walk_pre(const_tree e)
{
// This is for local variables
// and other declarations
exprTypeRewriter.walk(e);
}
void
GimpleTypeRewriter::_walk_pre(gimple *s)
{
}
void
GimpleTypeRewriter::_walk_pre(gcall *s)
{
}
void
GimpleTypeRewriter::_walk_pre(greturn *s)
{
}
void
GimpleTypeRewriter::handle_pointer_arithmetic(gimple *s)
{
const enum tree_code p = POINTER_PLUS_EXPR;
const enum tree_code d = POINTER_DIFF_EXPR;
const enum tree_code e = gimple_expr_code(s);
const bool is_pointer_plus = p == e;
const bool is_pointer_diff = d == e;
bool is_valid_input = is_pointer_plus != is_pointer_diff;
gcc_assert(is_valid_input);
// TODO: Implement pointer diff
const enum gimple_rhs_class rhs_class = gimple_assign_rhs_class(s);
is_valid_input = GIMPLE_BINARY_RHS == rhs_class;
gcc_assert(is_valid_input);
tree op_0 = gimple_assign_rhs1(s);
tree op_1 = gimple_assign_rhs2(s);
tree op_0_t = TREE_TYPE(op_0);
tree op_1_t = TREE_TYPE(op_1);
const bool is_op_0_t_interesting = exprTypeRewriter.is_interesting_type(op_0_t);
const bool is_op_1_t_interesting = exprTypeRewriter.is_interesting_type(op_1_t);
bool is_interesting_case = is_op_0_t_interesting || is_op_1_t_interesting;
if (!is_interesting_case) return;
const enum tree_code op_1_code = TREE_CODE(op_1);
const enum tree_code op_0_code = TREE_CODE(op_0);
const bool is_op_0_icst = INTEGER_CST == op_0_code;
const bool is_op_1_icst = INTEGER_CST == op_1_code;
const bool is_constant_case = is_op_0_icst != is_op_1_icst;
if (!is_constant_case)
{
exprTypeRewriter.handle_pointer_arithmetic_nonconstant(s, op_0, op_1, is_pointer_plus);
return;
}
tree integer_constant = is_op_0_icst ? op_0 : op_1;
tree maybe_pointer = is_op_0_icst ? op_1 : op_0;
const_tree maybe_pointer_t = TREE_TYPE(maybe_pointer);
assert_is_type(maybe_pointer_t, POINTER_TYPE);
tree pointer_variable = maybe_pointer;
exprTypeRewriter.handle_pointer_arithmetic_constants(s, pointer_variable, integer_constant, is_pointer_plus);
}
void
GimpleTypeRewriter::_walk_pre(gassign *s)
{
const enum gimple_rhs_class code = gimple_assign_rhs_class(s);
switch (code)
{
case GIMPLE_TERNARY_RHS:
{
const_tree rhs3 = gimple_assign_rhs3(s);
exprTypeRewriter.walk(rhs3);
}
/* fall-through */
case GIMPLE_BINARY_RHS:
{
const_tree rhs2 = gimple_assign_rhs2(s);
exprTypeRewriter.walk(rhs2);
}
/* fall-through */
case GIMPLE_UNARY_RHS:
case GIMPLE_SINGLE_RHS:
{
const_tree rhs1 = gimple_assign_rhs1(s);
exprTypeRewriter.walk(rhs1);
const_tree lhs = gimple_assign_lhs(s);
if (!lhs) break;
exprTypeRewriter.walk(lhs);
}
break;
default:
gcc_unreachable();
break;
}
const enum tree_code e_code = gimple_expr_code(s);
switch (e_code)
{
case POINTER_PLUS_EXPR:
case POINTER_DIFF_EXPR:
handle_pointer_arithmetic(s);
break;
default:
break;
}
}
void
GimpleTypeRewriter::_walk_pre(gcond *s)
{
}
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