1 // go.cc -- Go frontend main file for gcc.
3 // Copyright 2009 The Go Authors. All rights reserved.
4 // Use of this source code is governed by a BSD-style
5 // license that can be found in the LICENSE file.
15 // The unique prefix to use for exported symbols. This is set during
18 static std::string unique_prefix;
20 // The data structures we build to represent the file.
23 // Create the main IR data structure.
27 go_create_gogo(int int_type_size, int float_type_size, int pointer_size)
29 gcc_assert(::gogo == NULL);
30 ::gogo = new Gogo(int_type_size, float_type_size, pointer_size);
31 if (!unique_prefix.empty())
32 ::gogo->set_unique_prefix(unique_prefix);
35 // Set the unique prefix we use for exported symbols.
39 go_set_prefix(const char* arg)
42 for (size_t i = 0; i < unique_prefix.length(); ++i)
44 char c = unique_prefix[i];
45 if ((c >= 'a' && c <= 'z')
46 || (c >= 'A' && c <= 'Z')
47 || (c >= '0' && c <= '9')
51 unique_prefix[i] = '_';
55 // Parse the input files.
59 go_parse_input_files(const char** filenames, unsigned int filename_count,
60 bool only_check_syntax, bool require_return_statement)
62 gcc_assert(filename_count > 0);
63 for (unsigned int i = 0; i < filename_count; ++i)
66 ::gogo->clear_file_scope();
68 const char* filename = filenames[i];
70 if (strcmp(filename, "-") == 0)
74 file = fopen(filename, "r");
76 fatal_error("cannot open %s: %m", filename);
79 Lex lexer(filename, file);
81 Parse parse(&lexer, ::gogo);
84 if (strcmp(filename, "-") != 0)
88 ::gogo->clear_file_scope();
90 // If the global predeclared names are referenced but not defined,
92 ::gogo->define_global_names();
94 // Finalize method lists and build stub methods for named types.
95 ::gogo->finalize_methods();
97 // Now that we have seen all the names, lower the parse tree into a
98 // form which is easier to use.
99 ::gogo->lower_parse_tree();
101 // Now that we have seen all the names, verify that types are
103 ::gogo->verify_types();
105 // Work out types of unspecified constants and variables.
106 ::gogo->determine_types();
108 // Check types and issue errors as appropriate.
109 ::gogo->check_types();
111 if (only_check_syntax)
114 // Check that functions have return statements.
115 if (require_return_statement)
116 ::gogo->check_return_statements();
118 // Export global identifiers as appropriate.
119 ::gogo->do_exports();
121 // Build required interface method tables.
122 ::gogo->build_interface_method_tables();
124 // Turn short-cut operators (&&, ||) into explicit if statements.
125 ::gogo->remove_shortcuts();
127 // Use temporary variables to force order of evaluation.
128 ::gogo->order_evaluations();
130 // Build thunks for functions which call recover.
131 ::gogo->build_recover_thunks();
133 // Convert complicated go and defer statements into simpler ones.
134 ::gogo->simplify_thunk_statements();
137 // Write out globals.
143 return ::gogo->write_globals();
146 // Return the global IR structure. This is used by some of the
147 // langhooks to pass to other code.