gcc-plugins: remove code for GCC versions older than 4.9

Documentation/process/changes.rst says the minimal GCC version is 4.9.
Hence, BUILDING_GCC_VERSION is greater than or equal to 4009.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201202134929.99883-1-masahiroy@kernel.org

scripts/gcc-plugins/gcc-generate-gimple-pass.h

@@ -73,18 +73,11 @@
 #define TODO_FLAGS_FINISH 0
 #endif
 
-#if BUILDING_GCC_VERSION >= 4009
 namespace {
 static const pass_data _PASS_NAME_PASS_DATA = {
-#else
-static struct gimple_opt_pass _PASS_NAME_PASS = {
-	.pass = {
-#endif
 		.type			= GIMPLE_PASS,
 		.name			= _PASS_NAME_NAME,
-#if BUILDING_GCC_VERSION >= 4008
 		.optinfo_flags		= OPTGROUP_NONE,
-#endif
 #if BUILDING_GCC_VERSION >= 5000
 #elif BUILDING_GCC_VERSION == 4009
 		.has_gate		= _HAS_GATE,
@@ -102,12 +95,8 @@ static struct gimple_opt_pass _PASS_NAME_PASS = {
 		.properties_destroyed	= PROPERTIES_DESTROYED,
 		.todo_flags_start	= TODO_FLAGS_START,
 		.todo_flags_finish	= TODO_FLAGS_FINISH,
-#if BUILDING_GCC_VERSION < 4009
-	}
-#endif
 };
 
-#if BUILDING_GCC_VERSION >= 4009
 class _PASS_NAME_PASS : public gimple_opt_pass {
 public:
 	_PASS_NAME_PASS() : gimple_opt_pass(_PASS_NAME_PASS_DATA, g) {}
@@ -128,7 +117,6 @@ class _PASS_NAME_PASS : public gimple_opt_pass {
 #else
 	virtual unsigned int execute(void) { return _EXECUTE(); }
 #endif
-#endif
 };
 }
 

scripts/gcc-plugins/gcc-generate-ipa-pass.h

@@ -141,18 +141,11 @@
 #define FUNCTION_TRANSFORM_TODO_FLAGS_START 0
 #endif
 
-#if BUILDING_GCC_VERSION >= 4009
 namespace {
 static const pass_data _PASS_NAME_PASS_DATA = {
-#else
-static struct ipa_opt_pass_d _PASS_NAME_PASS = {
-	.pass = {
-#endif
 		.type			= IPA_PASS,
 		.name			= _PASS_NAME_NAME,
-#if BUILDING_GCC_VERSION >= 4008
 		.optinfo_flags		= OPTGROUP_NONE,
-#endif
 #if BUILDING_GCC_VERSION >= 5000
 #elif BUILDING_GCC_VERSION == 4009
 		.has_gate		= _HAS_GATE,
@@ -170,23 +163,8 @@ static struct ipa_opt_pass_d _PASS_NAME_PASS = {
 		.properties_destroyed	= PROPERTIES_DESTROYED,
 		.todo_flags_start	= TODO_FLAGS_START,
 		.todo_flags_finish	= TODO_FLAGS_FINISH,
-#if BUILDING_GCC_VERSION < 4009
-	},
-	.generate_summary		= _GENERATE_SUMMARY,
-	.write_summary			= _WRITE_SUMMARY,
-	.read_summary			= _READ_SUMMARY,
-#if BUILDING_GCC_VERSION >= 4006
-	.write_optimization_summary	= _WRITE_OPTIMIZATION_SUMMARY,
-	.read_optimization_summary	= _READ_OPTIMIZATION_SUMMARY,
-#endif
-	.stmt_fixup			= _STMT_FIXUP,
-	.function_transform_todo_flags_start	= FUNCTION_TRANSFORM_TODO_FLAGS_START,
-	.function_transform		= _FUNCTION_TRANSFORM,
-	.variable_transform		= _VARIABLE_TRANSFORM,
-#endif
 };
 
-#if BUILDING_GCC_VERSION >= 4009
 class _PASS_NAME_PASS : public ipa_opt_pass_d {
 public:
 	_PASS_NAME_PASS() : ipa_opt_pass_d(_PASS_NAME_PASS_DATA,
@@ -206,7 +184,6 @@ class _PASS_NAME_PASS : public ipa_opt_pass_d {
 	virtual bool gate(function *) { return _GATE(); }
 #else
 	virtual bool gate(void) { return _GATE(); }
-#endif
 #endif
 
 	virtual opt_pass *clone() { return new _PASS_NAME_PASS(); }

scripts/gcc-plugins/gcc-generate-rtl-pass.h

@@ -73,18 +73,11 @@
 #define TODO_FLAGS_FINISH 0
 #endif
 
-#if BUILDING_GCC_VERSION >= 4009
 namespace {
 static const pass_data _PASS_NAME_PASS_DATA = {
-#else
-static struct rtl_opt_pass _PASS_NAME_PASS = {
-	.pass = {
-#endif
 		.type			= RTL_PASS,
 		.name			= _PASS_NAME_NAME,
-#if BUILDING_GCC_VERSION >= 4008
 		.optinfo_flags		= OPTGROUP_NONE,
-#endif
 #if BUILDING_GCC_VERSION >= 5000
 #elif BUILDING_GCC_VERSION == 4009
 		.has_gate		= _HAS_GATE,
@@ -102,12 +95,8 @@ static struct rtl_opt_pass _PASS_NAME_PASS = {
 		.properties_destroyed	= PROPERTIES_DESTROYED,
 		.todo_flags_start	= TODO_FLAGS_START,
 		.todo_flags_finish	= TODO_FLAGS_FINISH,
-#if BUILDING_GCC_VERSION < 4009
-	}
-#endif
 };
 
-#if BUILDING_GCC_VERSION >= 4009
 class _PASS_NAME_PASS : public rtl_opt_pass {
 public:
 	_PASS_NAME_PASS() : rtl_opt_pass(_PASS_NAME_PASS_DATA, g) {}
@@ -136,12 +125,6 @@ opt_pass *_MAKE_PASS_NAME_PASS(void)
 {
 	return new _PASS_NAME_PASS();
 }
-#else
-struct opt_pass *_MAKE_PASS_NAME_PASS(void)
-{
-	return &_PASS_NAME_PASS.pass;
-}
-#endif
 
 /* clean up user provided defines */
 #undef PASS_NAME

scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h

@@ -73,18 +73,11 @@
 #define TODO_FLAGS_FINISH 0
 #endif
 
-#if BUILDING_GCC_VERSION >= 4009
 namespace {
 static const pass_data _PASS_NAME_PASS_DATA = {
-#else
-static struct simple_ipa_opt_pass _PASS_NAME_PASS = {
-	.pass = {
-#endif
 		.type			= SIMPLE_IPA_PASS,
 		.name			= _PASS_NAME_NAME,
-#if BUILDING_GCC_VERSION >= 4008
 		.optinfo_flags		= OPTGROUP_NONE,
-#endif
 #if BUILDING_GCC_VERSION >= 5000
 #elif BUILDING_GCC_VERSION == 4009
 		.has_gate		= _HAS_GATE,
@@ -102,12 +95,8 @@ static struct simple_ipa_opt_pass _PASS_NAME_PASS = {
 		.properties_destroyed	= PROPERTIES_DESTROYED,
 		.todo_flags_start	= TODO_FLAGS_START,
 		.todo_flags_finish	= TODO_FLAGS_FINISH,
-#if BUILDING_GCC_VERSION < 4009
-	}
-#endif
 };
 
-#if BUILDING_GCC_VERSION >= 4009
 class _PASS_NAME_PASS : public simple_ipa_opt_pass {
 public:
 	_PASS_NAME_PASS() : simple_ipa_opt_pass(_PASS_NAME_PASS_DATA, g) {}
@@ -136,12 +125,6 @@ opt_pass *_MAKE_PASS_NAME_PASS(void)
 {
 	return new _PASS_NAME_PASS();
 }
-#else
-struct opt_pass *_MAKE_PASS_NAME_PASS(void)
-{
-	return &_PASS_NAME_PASS.pass;
-}
-#endif
 
 /* clean up user provided defines */
 #undef PASS_NAME

scripts/gcc-plugins/latent_entropy_plugin.c

@@ -125,11 +125,7 @@ static tree handle_latent_entropy_attribute(tree *node, tree name,
 						bool *no_add_attrs)
 {
 	tree type;
-#if BUILDING_GCC_VERSION <= 4007
-	VEC(constructor_elt, gc) *vals;
-#else
 	vec<constructor_elt, va_gc> *vals;
-#endif
 
 	switch (TREE_CODE(*node)) {
 	default:
@@ -181,11 +177,7 @@ static tree handle_latent_entropy_attribute(tree *node, tree name,
 			if (fld)
 				break;
 
-#if BUILDING_GCC_VERSION <= 4007
-			vals = VEC_alloc(constructor_elt, gc, nelt);
-#else
 			vec_alloc(vals, nelt);
-#endif
 
 			for (fld = lst; fld; fld = TREE_CHAIN(fld)) {
 				tree random_const, fld_t = TREE_TYPE(fld);
@@ -225,11 +217,7 @@ static tree handle_latent_entropy_attribute(tree *node, tree name,
 			elt_size_int = TREE_INT_CST_LOW(elt_size);
 			nelt = array_size_int / elt_size_int;
 
-#if BUILDING_GCC_VERSION <= 4007
-			vals = VEC_alloc(constructor_elt, gc, nelt);
-#else
 			vec_alloc(vals, nelt);
-#endif
 
 			for (i = 0; i < nelt; i++) {
 				tree cst = size_int(i);

scripts/gcc-plugins/randomize_layout_plugin.c

@@ -590,16 +590,12 @@ static void register_attributes(void *event_data, void *data)
 	randomize_layout_attr.name		= "randomize_layout";
 	randomize_layout_attr.type_required	= true;
 	randomize_layout_attr.handler		= handle_randomize_layout_attr;
-#if BUILDING_GCC_VERSION >= 4007
 	randomize_layout_attr.affects_type_identity = true;
-#endif
 
 	no_randomize_layout_attr.name		= "no_randomize_layout";
 	no_randomize_layout_attr.type_required	= true;
 	no_randomize_layout_attr.handler	= handle_randomize_layout_attr;
-#if BUILDING_GCC_VERSION >= 4007
 	no_randomize_layout_attr.affects_type_identity = true;
-#endif
 
 	randomize_considered_attr.name		= "randomize_considered";
 	randomize_considered_attr.type_required	= true;

scripts/gcc-plugins/sancov_plugin.c

@@ -80,10 +80,8 @@ static void sancov_start_unit(void __unused *gcc_data, void __unused *user_data)
 	nothrow_attr = tree_cons(get_identifier("nothrow"), NULL, NULL);
 	decl_attributes(&sancov_fndecl, nothrow_attr, 0);
 	gcc_assert(TREE_NOTHROW(sancov_fndecl));
-#if BUILDING_GCC_VERSION > 4005
 	leaf_attr = tree_cons(get_identifier("leaf"), NULL, NULL);
 	decl_attributes(&sancov_fndecl, leaf_attr, 0);
-#endif
 }
 
 __visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version)
@@ -106,11 +104,7 @@ __visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gc
 	};
 
 	/* BBs can be split afterwards?? */
-#if BUILDING_GCC_VERSION >= 4009
 	PASS_INFO(sancov, "asan", 0, PASS_POS_INSERT_BEFORE);
-#else
-	PASS_INFO(sancov, "nrv", 1, PASS_POS_INSERT_BEFORE);
-#endif
 
 	if (!plugin_default_version_check(version, &gcc_version)) {
 		error(G_("incompatible gcc/plugin versions"));

scripts/gcc-plugins/stackleak_plugin.c

@@ -80,10 +80,8 @@ static bool is_alloca(gimple stmt)
 	if (gimple_call_builtin_p(stmt, BUILT_IN_ALLOCA))
 		return true;
 
-#if BUILDING_GCC_VERSION >= 4007
 	if (gimple_call_builtin_p(stmt, BUILT_IN_ALLOCA_WITH_ALIGN))
 		return true;
-#endif
 
 	return false;
 }
@@ -322,7 +320,7 @@ static void remove_stack_tracking_gcall(void)
 
 		/* Delete the stackleak_track_stack() call */
 		delete_insn_and_edges(insn);
-#if BUILDING_GCC_VERSION >= 4007 && BUILDING_GCC_VERSION < 8000
+#if BUILDING_GCC_VERSION < 8000
 		if (GET_CODE(next) == NOTE &&
 		    NOTE_KIND(next) == NOTE_INSN_CALL_ARG_LOCATION) {
 			insn = next;

scripts/gcc-plugins/structleak_plugin.c

@@ -68,9 +68,7 @@ static void register_attributes(void *event_data, void *data)
 {
 	user_attr.name			= "user";
 	user_attr.handler		= handle_user_attribute;
-#if BUILDING_GCC_VERSION >= 4007
 	user_attr.affects_type_identity	= true;
-#endif
 
 	register_attribute(&user_attr);
 }
@@ -137,11 +135,9 @@ static void initialize(tree var)
 		if (!gimple_assign_single_p(stmt))
 			continue;
 		rhs1 = gimple_assign_rhs1(stmt);
-#if BUILDING_GCC_VERSION >= 4007
 		/* ... of a non-clobbering expression... */
 		if (TREE_CLOBBER_P(rhs1))
 			continue;
-#endif
 		/* ... to our variable... */
 		if (gimple_get_lhs(stmt) != var)
 			continue;