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#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tree.h"
#include "options.h"
#include "cgraph.h"
#include "tree-pass.h"
#include "tree-cfg.h"
#include "tree-pretty-print.h"
#include "gimple-pretty-print.h"
#include "stringpool.h" //get_identifier
#include "basic-block.h" //needed for gimple.h
#include "function.h" //needed for gimple.h
#include "gimple.h"
#include "cfg.h" // needed for gimple-iterator.h
#include "gimple-iterator.h"
#include "stor-layout.h" // layout_type
#include "fold-const.h" //build_fold_addr_expr
#include "gimple-ssa.h" // update_stmt
#include "attribs.h" // decl_attributes
#include "gimplify.h" //unshare_expr
#include "value-range.h" // make_ssa_name dependency
#include "tree-ssanames.h" // make_ssa_name
#include "ssa.h"
#include "tree-into-ssa.h"
#include "gimple-rewriter.hpp"
#include "type-stringifier.hpp"
void
GimpleTypeRewriter::_walk_pre(const_tree e)
{
// This is for local variables
// and other declarations
exprTypeRewriter.walk(e);
bool _delete = exprTypeRewriter._delete;
exprTypeRewriter._delete = false;
// I don't think it is possible here (local variable delcarations and such);
gcc_assert(!_delete);
const bool is_interesting = exprTypeRewriter.is_interesting_type(TREE_TYPE(e));
const bool is_var_decl = TREE_CODE(e) == VAR_DECL;
const bool is_valid = is_interesting && is_var_decl;
if (!is_valid) return;
relayout_decl((tree)e);
}
void
GimpleTypeRewriter::_walk_pre(gimple *s)
{
}
void
GimpleTypeRewriter::_walk_pre(gcall *s)
{
}
void
GimpleTypeRewriter::_walk_pre(greturn *s)
{
const_tree val = gimple_return_retval(s);
if (!val) return;
log("rewriting a return value\n");
exprTypeRewriter.walk(val);
bool _delete = exprTypeRewriter._delete;
exprTypeRewriter._delete = false;
// We can't probably have a write in a return statement.
gcc_assert(!_delete);
}
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);
bool _delete = exprTypeRewriter._delete;
exprTypeRewriter._delete = false;
// probably no deletion in pointer arithmetic...
gcc_assert(!_delete);
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);
bool _delete = exprTypeRewriter._delete;
exprTypeRewriter._delete = false;
// probably no deletion in pointer arithmetic
gcc_assert(!_delete);
}
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;
// Here is the only place where we likely can delete a statement.
exprTypeRewriter.walk(lhs);
bool _delete = exprTypeRewriter._delete;
exprTypeRewriter._delete = false;
if (_delete)
{
_deleted = true;
}
}
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;
case COMPONENT_REF:
{
log("i am missing a component ref\n");
print_gimple_stmt(dump_file, s, 0);
log("\n");
///TypeStringifier stringifier;
//const_tree type = TREE_TYPE(s);
//std::string name = stringifier.stringify(type);
//log("%s\n", name.c_str());
}
break;
break;
default:
log("missing %s\n", get_tree_code_name(e_code));
break;
}
}
void
GimpleTypeRewriter::_walk_pre(gcond *s)
{
}
void
GimpleTypeRewriter::_rewrite_function_decl()
{
// NOTE: It seems we only need to rewrite the return type
// for now...
cgraph_node *node = NULL;
FOR_EACH_FUNCTION_WITH_GIMPLE_BODY(node)
{
node->get_untransformed_body();
tree fndecl = node->decl;
gcc_assert(fndecl);
exprTypeRewriter.walk(fndecl);
tree decl = DECL_RESULT(fndecl);
if (decl) exprTypeRewriter.walk(decl);
}
}
void
GimpleTypeRewriter::_walk_pre(gphi *s)
{
unsigned n = gimple_phi_num_args (s);
for (unsigned i = 0; i < n; i++)
{
tree a = gimple_phi_arg_def(s, i);
exprTypeRewriter.walk(a);
}
}
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