wrong event for AST PLUGIN_PRE_GENERICIZE is needed
----------------------------------------
> From: asmprog32@xxxxxxxxxxx
> To: gcc-help@xxxxxxxxxxx
> Subject: DECL_SAVED_TREE is always null on the first FUNCTION_DECL and is not null on the others
> Date: Sat, 3 Jul 2010 14:33:32 +0200
>
>
> Look at this simple plugins code ( All sources are at the end of this mail )
>
> bug.cpp
>
> compile with
>
> g++ -shared -I/usr/local/lib/gcc/i686-pc-linux-gnu/4.5.0/plugin/include -DUNIX
> -g -Wall -Werror -O0 -fPIC -DPIC -o libbug.so bug.cpp
>
>
> than ran this plugins on example.cpp with
>
> g++ -S -fplugin=libbug.so example.cpp
>
> the output
>
>
> starting libbug
> processing example.cpp
> unused_f2 0 <------- decl saved tree is null
> unused_f 0xb7409ad4
> main 0xb7496c90
> function_1 0xb7496c78
>
>
> now add a function at the end of the file like example2.cpp
>
> and run the plugins on it
>
> starting libbug
> processing example2.cpp
> unused_f3 0 <----------- DECL_SAVED_TREE null
> unused_f2 0xb754be28 <----------- DECL_SAVED_TREE != null
> unused_f 0xb74bead4
> main 0xb754bc90
> function_1 0xb754bc78
>
>
> It seem that the last (on file) / first (on list) function_decl has always
> DECL_SAVED_TREE == null
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Source codes
>
> /* bug.cpp */
>
> // GCC header includes to get the parse tree
> // declarations. The order is important and
> // doesn't follow any kind of logic.
> //
>
> #include "config.h"
>
> /* Needed to undef because gcc-plugins redefine them */
>
> #undef PACKAGE_BUGREPORT
> #undef PACKAGE_NAME
> #undef PACKAGE_STRING
> #undef PACKAGE_TARNAME
> #undef PACKAGE_VERSION
>
>
> #include
> #include
> #include
>
> #include // Include before GCC poisons
> // some declarations.
>
> extern "C"
> {
> #include "gcc-plugin.h"
> #include "plugin-version.h"
> #include "system.h"
> #include "coretypes.h"
> #include "tree.h"
> #include "intl.h"
>
> #include "tm.h"
>
> #include "diagnostic.h"
> #include "c-common.h"
> #include "c-pragma.h"
> #include "cp/cp-tree.h"
> }
>
> #include
> #include "tree-iterator.h"
>
> int plugin_is_GPL_compatible;
>
>
>
> void collect (tree ns)
> {
> tree decl;
> cp_binding_level* level (NAMESPACE_LEVEL (ns));
>
> // Collect declarations.
> //
>
> for (decl = level->names; decl != 0; decl = TREE_CHAIN (decl))
> {
> if (DECL_IS_BUILTIN (decl))
> continue;
>
> if (TREE_CODE(decl) == FUNCTION_DECL)
> std::cerr << IDENTIFIER_POINTER(DECL_NAME(decl)) << " " << DECL_SAVED_TREE(decl) << "\n";
> }
> }
>
> extern "C" void gate_callback (void*, void*)
> {
> // If there were errors during compilation,
> // let GCC handle the exit.
> //
>
> if (errorcount || sorrycount)
> return;
>
> int r (0);
>
> //
> // Process AST. Issue diagnostics and set r
> // to 1 in case of an error.
> //
> std::cerr << "processing " << main_input_filename << "\n";
> collect (global_namespace);
>
> exit (r);
> }
>
> extern "C" int plugin_init (plugin_name_args* info, plugin_gcc_version* ver)
> {
> if (!plugin_default_version_check (ver, &gcc_version))
> return 1;
>
> int r (0);
>
> std::cerr << "starting " << info->base_name << "\n";
>
> //
> // Parse options if any.
> //
>
> // Disable assembly output.
> //
> asm_file_name = HOST_BIT_BUCKET;
>
> // Register callbacks.
> //
> register_callback (info->base_name, PLUGIN_OVERRIDE_GATE, &gate_callback, 0);
>
> return r;
> }
>
>
>
>
> /* example.cpp */
>
>
> int test;
> double var;
>
> int function_1(int param1, int param2)
> {
> param1 = param1 * param2;
> param2 = param1 + param2;
>
> return param1 + param2;
> }
>
> int main(int argc, char **argv)
> {
> int var = 0;
> double test = 0;
>
> test = 5 * var + 7;
>
> return 0;
> }
>
> int unused_f(int p1, int p2)
> {
> return p1 + p2;
> }
>
> int unused_f2(int p1)
> {
> p1 = p1 * p1;
>
> return p1;
> }
>
> /* example2.cpp */
>
>
> int test;
> double var;
>
> int function_1(int param1, int param2)
> {
> param1 = param1 * param2;
> param2 = param1 + param2;
>
> return param1 + param2;
> }
>
> int main(int argc, char **argv)
> {
> int var = 0;
> double test = 0;
>
> test = 5 * var + 7;
>
> return 0;
> }
>
> int unused_f(int p1, int p2)
> {
> return p1 + p2;
> }
>
> int unused_f2(int p1)
> {
> p1 = p1 * p1;
>
> return p1;
> }
>
> int unused_f3(int p1)
> {
> p1 = p1 / 2;
>
> return p1;
> }
>
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