X-Git-Url: http://nitlanguage.org

diff --git a/src/abstract_compiler.nit b/src/abstract_compiler.nit
index 0ba5de3..d83d574 100644
--- a/src/abstract_compiler.nit
+++ b/src/abstract_compiler.nit
@@ -20,15 +20,19 @@ module abstract_compiler
 import literal
 import typing
 import auto_super_init
-import frontend
-import common_ffi
+import platform
+import c_tools
 
 # Add compiling options
 redef class ToolContext
 	# --output
 	var opt_output: OptionString = new OptionString("Output file", "-o", "--output")
+	# --dir
+	var opt_dir: OptionString = new OptionString("Output directory", "--dir")
 	# --no-cc
 	var opt_no_cc: OptionBool = new OptionBool("Do not invoke C compiler", "--no-cc")
+	# --no-main
+	var opt_no_main: OptionBool = new OptionBool("Do not generate main entry point", "--no-main")
 	# --cc-paths
 	var opt_cc_path: OptionArray = new OptionArray("Set include path for C header files (may be used more than once)", "--cc-path")
 	# --make-flags
@@ -41,8 +45,8 @@ redef class ToolContext
 	var opt_no_shortcut_range: OptionBool = new OptionBool("Always insantiate a range and its iterator on 'for' loops", "--no-shortcut-range")
 	# --no-check-covariance
 	var opt_no_check_covariance: OptionBool = new OptionBool("Disable type tests of covariant parameters (dangerous)", "--no-check-covariance")
-	# --no-check-initialization
-	var opt_no_check_initialization: OptionBool = new OptionBool("Disable isset tests at the end of constructors (dangerous)", "--no-check-initialization")
+	# --no-check-attr-isset
+	var opt_no_check_attr_isset: OptionBool = new OptionBool("Disable isset tests before each attribute access (dangerous)", "--no-check-attr-isset")
 	# --no-check-assert
 	var opt_no_check_assert: OptionBool = new OptionBool("Disable the evaluation of explicit 'assert' and 'as' (dangerous)", "--no-check-assert")
 	# --no-check-autocast
@@ -51,54 +55,109 @@ redef class ToolContext
 	var opt_no_check_other: OptionBool = new OptionBool("Disable implicit tests: unset attribute, null receiver (dangerous)", "--no-check-other")
 	# --typing-test-metrics
 	var opt_typing_test_metrics: OptionBool = new OptionBool("Enable static and dynamic count of all type tests", "--typing-test-metrics")
-	# --no-stacktrace
-	var opt_no_stacktrace: OptionBool = new OptionBool("Disables libunwind and generation of C stack traces (can be problematic when compiling to targets such as Android or NaCl)", "--no-stacktrace")
-	# --stack-trace-C-to-Nit-name-binding
-	var opt_stacktrace: OptionBool = new OptionBool("Enables the use of gperf to bind C to Nit function names when encountering a Stack trace at runtime", "--nit-stacktrace")
+	# --invocation-metrics
+	var opt_invocation_metrics: OptionBool = new OptionBool("Enable static and dynamic count of all method invocations", "--invocation-metrics")
+	# --isset-checks-metrics
+	var opt_isset_checks_metrics: OptionBool = new OptionBool("Enable static and dynamic count of isset checks before attributes access", "--isset-checks-metrics")
+	# --stacktrace
+	var opt_stacktrace: OptionString = new OptionString("Control the generation of stack traces", "--stacktrace")
+	# --no-gcc-directives
+	var opt_no_gcc_directive = new OptionArray("Disable a advanced gcc directives for optimization", "--no-gcc-directive")
+	# --release
+	var opt_release = new OptionBool("Compile in release mode and finalize application", "--release")
 
 	redef init
 	do
 		super
-		self.option_context.add_option(self.opt_output, self.opt_no_cc, self.opt_make_flags, self.opt_compile_dir, self.opt_hardening, self.opt_no_shortcut_range)
-		self.option_context.add_option(self.opt_no_check_covariance, self.opt_no_check_initialization, self.opt_no_check_assert, self.opt_no_check_autocast, self.opt_no_check_other)
-		self.option_context.add_option(self.opt_typing_test_metrics)
+		self.option_context.add_option(self.opt_output, self.opt_dir, self.opt_no_cc, self.opt_no_main, self.opt_make_flags, self.opt_compile_dir, self.opt_hardening, self.opt_no_shortcut_range)
+		self.option_context.add_option(self.opt_no_check_covariance, self.opt_no_check_attr_isset, self.opt_no_check_assert, self.opt_no_check_autocast, self.opt_no_check_other)
+		self.option_context.add_option(self.opt_typing_test_metrics, self.opt_invocation_metrics, self.opt_isset_checks_metrics)
 		self.option_context.add_option(self.opt_stacktrace)
-		self.option_context.add_option(self.opt_no_stacktrace)
+		self.option_context.add_option(self.opt_no_gcc_directive)
+		self.option_context.add_option(self.opt_release)
+	end
+
+	redef fun process_options(args)
+	do
+		super
+
+		var st = opt_stacktrace.value
+		if st == "none" or st == "libunwind" or st == "nitstack" then
+			# Fine, do nothing
+		else if st == "auto" or st == null then
+			# Default is nitstack
+			opt_stacktrace.value = "nitstack"
+		else
+			print "Error: unknown value `{st}` for --stacktrace. Use `none`, `libunwind`, `nitstack` or `auto`."
+			exit(1)
+		end
+
+		if opt_output.value != null and opt_dir.value != null then
+			print "Error: cannot use both --dir and --output"
+			exit(1)
+		end
 	end
 end
 
 redef class ModelBuilder
+	# The compilation directory
+	var compile_dir: String
+
+	# Simple indirection to `Toolchain::write_and_make`
+	protected fun write_and_make(compiler: AbstractCompiler)
+	do
+		var platform = compiler.mainmodule.target_platform
+		var toolchain
+		if platform == null then
+			toolchain = new MakefileToolchain(toolcontext)
+		else
+			toolchain = platform.toolchain(toolcontext)
+		end
+		compile_dir = toolchain.compile_dir
+		toolchain.write_and_make compiler
+	end
+end
+
+redef class Platform
+	fun toolchain(toolcontext: ToolContext): Toolchain is abstract
+end
+
+class Toolchain
+	var toolcontext: ToolContext
+
+	fun compile_dir: String
+	do
+		var compile_dir = toolcontext.opt_compile_dir.value
+		if compile_dir == null then compile_dir = ".nit_compile"
+		return compile_dir
+	end
+
+	fun write_and_make(compiler: AbstractCompiler) is abstract
+end
+
+class MakefileToolchain
+	super Toolchain
 	# The list of directories to search for included C headers (-I for C compilers)
 	# The list is initially set with :
 	#   * the toolcontext --cc-path option
 	#   * the NIT_CC_PATH environment variable
-	#   * some heuristics including the NIT_DIR environment variable and the progname of the process
+	#   * `toolcontext.nit_dir`
 	# Path can be added (or removed) by the client
 	var cc_paths = new Array[String]
 
-	redef init(model, toolcontext)
+	protected fun gather_cc_paths
 	do
-		super
-
 		# Look for the the Nit clib path
-		var path_env = "NIT_DIR".environ
-		if not path_env.is_empty then
+		var path_env = toolcontext.nit_dir
+		if path_env != null then
 			var libname = "{path_env}/clib"
 			if libname.file_exists then cc_paths.add(libname)
 		end
 
-		var libname = "{sys.program_name.dirname}/../clib"
-		if libname.file_exists then cc_paths.add(libname.simplify_path)
-
 		if cc_paths.is_empty then
 			toolcontext.error(null, "Cannot determine the nit clib path. define envvar NIT_DIR.")
 		end
 
-		if toolcontext.opt_no_stacktrace.value and toolcontext.opt_stacktrace.value then
-			print "Cannot use --nit-stacktrace when --no-stacktrace is activated"
-			exit(1)
-		end
-
 		# Add user defined cc_paths
 		cc_paths.append(toolcontext.opt_cc_path.value)
 
@@ -106,18 +165,14 @@ redef class ModelBuilder
 		if not path_env.is_empty then
 			cc_paths.append(path_env.split_with(':'))
 		end
-
-		var compile_dir = toolcontext.opt_compile_dir.value
-		if compile_dir == null then compile_dir = ".nit_compile"
-		self.compile_dir = compile_dir
 	end
 
-	# The compilation directory
-	var compile_dir: String
-
-	protected fun write_and_make(compiler: AbstractCompiler)
+	redef fun write_and_make(compiler)
 	do
+		gather_cc_paths
+
 		var mainmodule = compiler.mainmodule
+		var compile_dir = compile_dir
 
 		# Generate the .h and .c files
 		# A single C file regroups many compiled rumtime functions
@@ -152,20 +207,21 @@ redef class ModelBuilder
 
 	fun write_files(compiler: AbstractCompiler, compile_dir: String, cfiles: Array[String])
 	do
-		if self.toolcontext.opt_stacktrace.value then compiler.build_c_to_nit_bindings
+		var platform = compiler.mainmodule.target_platform
+		if self.toolcontext.opt_stacktrace.value == "nitstack" and (platform == null or platform.supports_libunwind) then compiler.build_c_to_nit_bindings
+		var cc_opt_with_libgc = "-DWITH_LIBGC"
+		if platform != null and not platform.supports_libgc then cc_opt_with_libgc = ""
 
 		# Add gc_choser.h to aditionnal bodies
-		var gc_chooser = new ExternCFile("gc_chooser.c", "-DWITH_LIBGC")
+		var gc_chooser = new ExternCFile("gc_chooser.c", cc_opt_with_libgc)
 		compiler.extern_bodies.add(gc_chooser)
 		compiler.files_to_copy.add "{cc_paths.first}/gc_chooser.c"
 		compiler.files_to_copy.add "{cc_paths.first}/gc_chooser.h"
 
 		# FFI
-		for m in compiler.mainmodule.in_importation.greaters do if mmodule2nmodule.keys.has(m) then
-			var amodule = mmodule2nmodule[m]
-			if m.uses_ffi or amodule.uses_legacy_ni then
-				compiler.finalize_ffi_for_module(amodule)
-			end
+		var m2m = toolcontext.modelbuilder.mmodule2nmodule
+		for m in compiler.mainmodule.in_importation.greaters do
+			compiler.finalize_ffi_for_module(m)
 		end
 
 		# Copy original .[ch] files to compile_dir
@@ -198,7 +254,12 @@ redef class ModelBuilder
 			hfile.write "#include \"{hfilename}\"\n"
 			for key in f.required_declarations do
 				if not compiler.provided_declarations.has_key(key) then
-					print "No provided declaration for {key}"
+					var node = compiler.requirers_of_declarations.get_or_null(key)
+					if node != null then
+						node.debug "No provided declaration for {key}"
+					else
+						print "No provided declaration for {key}"
+					end
 					abort
 				end
 				hfile.write compiler.provided_declarations[key]
@@ -237,18 +298,31 @@ redef class ModelBuilder
 		self.toolcontext.info("Total C source files to compile: {cfiles.length}", 2)
 	end
 
+	fun makefile_name(mainmodule: MModule): String do return "{mainmodule.name}.mk"
+
+	fun default_outname(mainmodule: MModule): String do return mainmodule.name
+
+	# Combine options and platform informations to get the final path of the outfile
+	fun outfile(mainmodule: MModule): String
+	do
+		var res = self.toolcontext.opt_output.value
+		if res != null then return res
+		res = default_outname(mainmodule)
+		var dir = self.toolcontext.opt_dir.value
+		if dir != null then return dir.join_path(res)
+		return res
+	end
+
 	fun write_makefile(compiler: AbstractCompiler, compile_dir: String, cfiles: Array[String])
 	do
 		var mainmodule = compiler.mainmodule
+		var platform = compiler.mainmodule.target_platform
 
-		var outname = self.toolcontext.opt_output.value
-		if outname == null then
-			outname = "{mainmodule.name}"
-		end
+		var outname = outfile(mainmodule)
 
 		var orig_dir=".." # FIXME only works if `compile_dir` is a subdirectory of cwd
 		var outpath = orig_dir.join_path(outname).simplify_path
-		var makename = "{mainmodule.name}.mk"
+		var makename = makefile_name(mainmodule)
 		var makepath = "{compile_dir}/{makename}"
 		var makefile = new OFStream.open(makepath)
 
@@ -258,14 +332,34 @@ redef class ModelBuilder
 		end
 
 		var linker_options = new HashSet[String]
-		for m in mainmodule.in_importation.greaters do if mmodule2nmodule.keys.has(m) then
-			var amod = mmodule2nmodule[m]
-			linker_options.add(amod.c_linker_options)
+		var m2m = toolcontext.modelbuilder.mmodule2nmodule
+		for m in mainmodule.in_importation.greaters do
+			var libs = m.collect_linker_libs
+			if libs != null then linker_options.add_all(libs)
 		end
 
-		if not toolcontext.opt_no_stacktrace.value then linker_options.add("-lunwind")
+		makefile.write("CC = ccache cc\nCXX = ccache c++\nCFLAGS = -g -O2 -Wno-unused-value -Wno-switch\nCINCL = {cc_includes}\nLDFLAGS ?= \nLDLIBS  ?= -lm -lgc {linker_options.join(" ")}\n\n")
+
+		var ost = toolcontext.opt_stacktrace.value
+		if (ost == "libunwind" or ost == "nitstack") and (platform == null or platform.supports_libunwind) then makefile.write("NEED_LIBUNWIND := YesPlease\n")
+
+		# Dynamic adaptations
+		# While `platform` enable complex toolchains, they are statically applied
+		# For a dynamic adaptsation of the compilation, the generated Makefile should check and adapt things itself
+
+		# Check and adapt the targeted system
+		makefile.write("uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')\n")
+		makefile.write("ifeq ($(uname_S),Darwin)\n")
+		# remove -lunwind since it is already included on macosx
+		makefile.write("\tNEED_LIBUNWIND :=\n")
+		makefile.write("endif\n\n")
+
+		# Check and adapt for the compiler used
+		# clang need an additionnal `-Qunused-arguments`
+		makefile.write("clang_check := $(shell sh -c '$(CC) -v 2>&1 | grep -q clang; echo $$?')\nifeq ($(clang_check), 0)\n\tCFLAGS += -Qunused-arguments\nendif\n")
+
+		makefile.write("ifdef NEED_LIBUNWIND\n\tLDLIBS += -lunwind\nendif\n")
 
-		makefile.write("CC = ccache cc\nCFLAGS = -g -O2\nCINCL = {cc_includes}\nLDFLAGS ?= \nLDLIBS  ?= -lm -lgc {linker_options.join(" ")}\n\n")
 		makefile.write("all: {outpath}\n\n")
 
 		var ofiles = new Array[String]
@@ -273,33 +367,39 @@ redef class ModelBuilder
 		# Compile each generated file
 		for f in cfiles do
 			var o = f.strip_extension(".c") + ".o"
-			makefile.write("{o}: {f}\n\t$(CC) $(CFLAGS) $(CINCL) -D NONITCNI -c -o {o} {f}\n\n")
+			makefile.write("{o}: {f}\n\t$(CC) $(CFLAGS) $(CINCL) -c -o {o} {f}\n\n")
 			ofiles.add(o)
 			dep_rules.add(o)
 		end
 
+		var java_files = new Array[ExternFile]
+
 		# Compile each required extern body into a specific .o
 		for f in compiler.extern_bodies do
-			if f isa ExternCFile then
-				var basename = f.filename.basename(".c")
-				var o = "{basename}.extern.o"
-				var ff = f.filename.basename("")
-				makefile.write("{o}: {ff}\n\t$(CC) $(CFLAGS) -D NONITCNI {f.cflags} -c -o {o} {ff}\n\n")
-				ofiles.add(o)
-				dep_rules.add(o)
-			else
-				var o = f.makefile_rule_name
-				var ff = f.filename.basename("")
-				makefile.write("{o}: {ff}\n")
-				makefile.write("\t{f.makefile_rule_content}\n")
-				dep_rules.add(f.makefile_rule_name)
+			var o = f.makefile_rule_name
+			var ff = f.filename.basename("")
+			makefile.write("{o}: {ff}\n")
+			makefile.write("\t{f.makefile_rule_content}\n\n")
+			dep_rules.add(f.makefile_rule_name)
 
-				if f isa ExternCppFile then ofiles.add(o)
-			end
+			if f.compiles_to_o_file then ofiles.add(o)
+			if f.add_to_jar then java_files.add(f)
+		end
+		
+		if not java_files.is_empty then
+			var jar_file = "{outpath}.jar"
+
+			var class_files_array = new Array[String]
+			for f in java_files do class_files_array.add(f.makefile_rule_name)
+			var class_files = class_files_array.join(" ")
+
+			makefile.write("{jar_file}: {class_files}\n")
+			makefile.write("\tjar cf {jar_file} {class_files}\n\n")
+			dep_rules.add jar_file
 		end
 
 		# Link edition
-		makefile.write("{outpath}: {ofiles.join(" ")}\n\t$(CC) $(LDFLAGS) -o {outpath} {ofiles.join(" ")} $(LDLIBS)\n\n")
+		makefile.write("{outpath}: {dep_rules.join(" ")}\n\t$(CC) $(LDFLAGS) -o {outpath} {ofiles.join(" ")} $(LDLIBS)\n\n")
 		# Clean
 		makefile.write("clean:\n\trm {ofiles.join(" ")} 2>/dev/null\n\n")
 		makefile.close
@@ -308,7 +408,7 @@ redef class ModelBuilder
 
 	fun compile_c_code(compiler: AbstractCompiler, compile_dir: String)
 	do
-		var makename = "{compiler.mainmodule.name}.mk" # FIXME duplicated from write_makefile
+		var makename = makefile_name(compiler.mainmodule)
 
 		var makeflags = self.toolcontext.opt_make_flags.value
 		if makeflags == null then makeflags = ""
@@ -383,36 +483,48 @@ abstract class AbstractCompiler
 
 	private var provided_declarations = new HashMap[String, String]
 
+	private var requirers_of_declarations = new HashMap[String, ANode]
+
 	# Builds the .c and .h files to be used when generating a Stack Trace
 	# Binds the generated C function names to Nit function names
 	fun build_c_to_nit_bindings
 	do
 		var compile_dir = modelbuilder.compile_dir
 
-		var stream = new OFStream.open("{compile_dir}/C_fun_names")
-		stream.write("%\{\n#include \"c_functions_hash.h\"\n%\}\n")
-		stream.write("%define lookup-function-name get_nit_name\n")
-		stream.write("struct C_Nit_Names;\n")
-		stream.write("%%\n")
-		stream.write("####\n")
+		var stream = new OFStream.open("{compile_dir}/c_functions_hash.c")
+		stream.write("#include <string.h>\n")
+		stream.write("#include <stdlib.h>\n")
+		stream.write("#include \"c_functions_hash.h\"\n")
+		stream.write("typedef struct C_Nit_Names\{char* name; char* nit_name;\}C_Nit_Names;\n")
+		stream.write("const char* get_nit_name(register const char* procproc, register unsigned int len)\{\n")
+		stream.write("char* procname = malloc(len+1);")
+		stream.write("memcpy(procname, procproc, len);")
+		stream.write("procname[len] = '\\0';")
+		stream.write("static const C_Nit_Names map[{names.length}] = \{\n")
 		for i in names.keys do
+			stream.write("\{\"")
 			stream.write(i)
-			stream.write(",\t\"")
+			stream.write("\",\"")
 			stream.write(names[i])
-			stream.write("\"\n")
-		end
-		stream.write("####\n")
-		stream.write("%%\n")
+			stream.write("\"\},\n")
+		end
+		stream.write("\};\n")
+		stream.write("int i;")
+		stream.write("for(i = 0; i < {names.length}; i++)\{")
+		stream.write("if(strcmp(procname,map[i].name) == 0)\{")
+		stream.write("free(procname);")
+		stream.write("return map[i].nit_name;")
+		stream.write("\}")
+		stream.write("\}")
+		stream.write("free(procname);")
+		stream.write("return NULL;")
+		stream.write("\}\n")
 		stream.close
 
 		stream = new OFStream.open("{compile_dir}/c_functions_hash.h")
-		stream.write("typedef struct C_Nit_Names\{char* name; char* nit_name;\}C_Nit_Names;\n")
-		stream.write("const struct C_Nit_Names* get_nit_name(register const char *str, register unsigned int len);\n")
+		stream.write("const char* get_nit_name(register const char* procname, register unsigned int len);\n")
 		stream.close
 
-		var x = new Process("gperf","{compile_dir}/C_fun_names","-t","-7","--output-file={compile_dir}/c_functions_hash.c","-C")
-		x.wait
-
 		extern_bodies.add(new ExternCFile("{compile_dir}/c_functions_hash.c", ""))
 	end
 
@@ -425,12 +537,36 @@ abstract class AbstractCompiler
 		self.header.add_decl("#include <stdio.h>")
 		self.header.add_decl("#include <string.h>")
 		self.header.add_decl("#include \"gc_chooser.h\"")
+		self.header.add_decl("#ifdef ANDROID")
+		self.header.add_decl("	#include <android/log.h>")
+		self.header.add_decl("	#define PRINT_ERROR(...) (void)__android_log_print(ANDROID_LOG_WARN, \"Nit\", __VA_ARGS__)")
+		self.header.add_decl("#else")
+		self.header.add_decl("	#define PRINT_ERROR(...) fprintf(stderr, __VA_ARGS__)")
+		self.header.add_decl("#endif")
 
 		compile_header_structs
 		compile_nitni_structs
 
-		# Signal handler function prototype
-		self.header.add_decl("void show_backtrace(int);")
+		var gccd_disable = modelbuilder.toolcontext.opt_no_gcc_directive.value
+		if gccd_disable.has("noreturn") or gccd_disable.has("all") then
+			# Signal handler function prototype
+			self.header.add_decl("void show_backtrace(int);")
+		else
+			self.header.add_decl("void show_backtrace(int) __attribute__ ((noreturn));")
+		end
+
+		if gccd_disable.has("likely") or gccd_disable.has("all") then
+			self.header.add_decl("#define likely(x)       (x)")
+			self.header.add_decl("#define unlikely(x)     (x)")
+		else if gccd_disable.has("correct-likely") then
+			# invert the `likely` definition
+			# Used by masochists to bench the worst case
+			self.header.add_decl("#define likely(x)       __builtin_expect((x),0)")
+			self.header.add_decl("#define unlikely(x)     __builtin_expect((x),1)")
+		else
+			self.header.add_decl("#define likely(x)       __builtin_expect((x),1)")
+			self.header.add_decl("#define unlikely(x)     __builtin_expect((x),0)")
+		end
 
 		# Global variable used by intern methods
 		self.header.add_decl("extern int glob_argc;")
@@ -442,7 +578,59 @@ abstract class AbstractCompiler
 	protected fun compile_header_structs is abstract
 
 	# Declaration of structures for nitni undelying the FFI
-	protected fun compile_nitni_structs is abstract
+	protected fun compile_nitni_structs
+	do
+		self.header.add_decl """
+/* Native reference to Nit objects */
+/* This structure is used to represent every Nit type in extern methods and custom C code. */
+struct nitni_ref {
+	struct nitni_ref *next,
+		*prev; /* adjacent global references in global list */
+	int count; /* number of time this global reference has been marked */
+};
+
+/* List of global references from C code to Nit objects */
+/* Instanciated empty at init of Nit system and filled explicitly by user in C code */
+struct nitni_global_ref_list_t {
+	struct nitni_ref *head, *tail;
+};
+extern struct nitni_global_ref_list_t *nitni_global_ref_list;
+
+/* Initializer of global reference list */
+extern void nitni_global_ref_list_init();
+
+/* Intern function to add a global reference to the list */
+extern void nitni_global_ref_add( struct nitni_ref *ref );
+
+/* Intern function to remove a global reference from the list */
+extern void nitni_global_ref_remove( struct nitni_ref *ref );
+
+/* Increase count on an existing global reference */
+extern void nitni_global_ref_incr( struct nitni_ref *ref );
+
+/* Decrease count on an existing global reference */
+extern void nitni_global_ref_decr( struct nitni_ref *ref );
+"""
+	end
+
+	fun compile_finalizer_function
+	do
+		var finalizable_type = mainmodule.finalizable_type
+		if finalizable_type == null then return
+
+		var finalize_meth = mainmodule.try_get_primitive_method("finalize", finalizable_type.mclass)
+
+		if finalize_meth == null then
+			modelbuilder.toolcontext.error(null, "The `Finalizable` class doesn't declare the `finalize` method.")
+			return
+		end
+
+		var v = self.new_visitor
+		v.add_decl "void gc_finalize (void *obj, void *client_data) \{"
+		var recv = v.new_expr("obj", finalizable_type)
+		v.send(finalize_meth, [recv])
+		v.add "\}"
+	end
 
 	# Generate the main C function.
 	# This function:
@@ -452,13 +640,20 @@ abstract class AbstractCompiler
 	fun compile_main_function
 	do
 		var v = self.new_visitor
-		if modelbuilder.toolcontext.opt_stacktrace.value then
-			v.add_decl("#include \"c_functions_hash.h\"")
-		end
 		v.add_decl("#include <signal.h>")
-		if not modelbuilder.toolcontext.opt_no_stacktrace.value then
+		var ost = modelbuilder.toolcontext.opt_stacktrace.value
+		var platform = mainmodule.target_platform
+
+		if platform != null and not platform.supports_libunwind then ost = "none"
+
+		var no_main = (platform != null and platform.no_main) or modelbuilder.toolcontext.opt_no_main.value
+
+		if ost == "nitstack" or ost == "libunwind" then
 			v.add_decl("#define UNW_LOCAL_ONLY")
 			v.add_decl("#include <libunwind.h>")
+			if ost == "nitstack" then
+				v.add_decl("#include \"c_functions_hash.h\"")
+			end
 		end
 		v.add_decl("int glob_argc;")
 		v.add_decl("char **glob_argv;")
@@ -475,13 +670,29 @@ abstract class AbstractCompiler
 			end
 		end
 
+		if self.modelbuilder.toolcontext.opt_invocation_metrics.value then
+			v.add_decl("long count_invoke_by_tables;")
+			v.add_decl("long count_invoke_by_direct;")
+			v.add_decl("long count_invoke_by_inline;")
+			v.compiler.header.add_decl("extern long count_invoke_by_tables;")
+			v.compiler.header.add_decl("extern long count_invoke_by_direct;")
+			v.compiler.header.add_decl("extern long count_invoke_by_inline;")
+		end
+
+		if self.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
+			v.add_decl("long count_attr_reads = 0;")
+			v.add_decl("long count_isset_checks = 0;")
+			v.compiler.header.add_decl("extern long count_attr_reads;")
+			v.compiler.header.add_decl("extern long count_isset_checks;")
+		end
+
 		v.add_decl("void sig_handler(int signo)\{")
-		v.add_decl("printf(\"Caught signal : %s\\n\", strsignal(signo));")
+		v.add_decl("PRINT_ERROR(\"Caught signal : %s\\n\", strsignal(signo));")
 		v.add_decl("show_backtrace(signo);")
 		v.add_decl("\}")
 
 		v.add_decl("void show_backtrace (int signo) \{")
-		if not modelbuilder.toolcontext.opt_no_stacktrace.value then
+		if ost == "nitstack" or ost == "libunwind" then
 			v.add_decl("char* opt = getenv(\"NIT_NO_STACK\");")
 			v.add_decl("unw_cursor_t cursor;")
 			v.add_decl("if(opt==NULL)\{")
@@ -490,30 +701,34 @@ abstract class AbstractCompiler
 			v.add_decl("char* procname = malloc(sizeof(char) * 100);")
 			v.add_decl("unw_getcontext(&uc);")
 			v.add_decl("unw_init_local(&cursor, &uc);")
-			v.add_decl("printf(\"-------------------------------------------------\\n\");")
-			v.add_decl("printf(\"--   Stack Trace   ------------------------------\\n\");")
-			v.add_decl("printf(\"-------------------------------------------------\\n\");")
+			v.add_decl("PRINT_ERROR(\"-------------------------------------------------\\n\");")
+			v.add_decl("PRINT_ERROR(\"--   Stack Trace   ------------------------------\\n\");")
+			v.add_decl("PRINT_ERROR(\"-------------------------------------------------\\n\");")
 			v.add_decl("while (unw_step(&cursor) > 0) \{")
 			v.add_decl("	unw_get_proc_name(&cursor, procname, 100, &ip);")
-			if modelbuilder.toolcontext.opt_stacktrace.value then
-			v.add_decl("	const C_Nit_Names* recv = get_nit_name(procname, strlen(procname));")
-			v.add_decl("	if (recv != 0)\{")
-			v.add_decl("		printf(\"` %s\\n\", recv->nit_name);")
+			if ost == "nitstack" then
+			v.add_decl("	const char* recv = get_nit_name(procname, strlen(procname));")
+			v.add_decl("	if (recv != NULL)\{")
+			v.add_decl("		PRINT_ERROR(\"` %s\\n\", recv);")
 			v.add_decl("	\}else\{")
-			v.add_decl("		printf(\"` %s\\n\", procname);")
+			v.add_decl("		PRINT_ERROR(\"` %s\\n\", procname);")
 			v.add_decl("	\}")
 			else
-			v.add_decl("	printf(\"` %s \\n\",procname);")
+			v.add_decl("	PRINT_ERROR(\"` %s \\n\",procname);")
 			end
 			v.add_decl("\}")
-			v.add_decl("printf(\"-------------------------------------------------\\n\");")
+			v.add_decl("PRINT_ERROR(\"-------------------------------------------------\\n\");")
 			v.add_decl("free(procname);")
 			v.add_decl("\}")
 		end
 		v.add_decl("exit(signo);")
 		v.add_decl("\}")
 
-		v.add_decl("int main(int argc, char** argv) \{")
+		if no_main then
+			v.add_decl("int nit_main(int argc, char** argv) \{")
+		else
+			v.add_decl("int main(int argc, char** argv) \{")
+		end
 
 		v.add("signal(SIGABRT, sig_handler);")
 		v.add("signal(SIGFPE, sig_handler);")
@@ -521,9 +736,13 @@ abstract class AbstractCompiler
 		v.add("signal(SIGINT, sig_handler);")
 		v.add("signal(SIGTERM, sig_handler);")
 		v.add("signal(SIGSEGV, sig_handler);")
+		v.add("signal(SIGPIPE, sig_handler);")
 
 		v.add("glob_argc = argc; glob_argv = argv;")
 		v.add("initialize_gc_option();")
+
+		v.add "initialize_nitni_global_refs();"
+
 		var main_type = mainmodule.sys_type
 		if main_type != null then
 			var mainmodule = v.compiler.mainmodule
@@ -533,7 +752,8 @@ abstract class AbstractCompiler
 			if main_init != null then
 				v.send(main_init, [glob_sys])
 			end
-			var main_method = mainmodule.try_get_primitive_method("main", main_type.mclass)
+			var main_method = mainmodule.try_get_primitive_method("run", main_type.mclass) or else
+				mainmodule.try_get_primitive_method("main", main_type.mclass)
 			if main_method != null then
 				v.send(main_method, [glob_sys])
 			end
@@ -565,10 +785,85 @@ abstract class AbstractCompiler
 			end
 		end
 
+		if self.modelbuilder.toolcontext.opt_invocation_metrics.value then
+			v.add_decl("long count_invoke_total;")
+			v.add("count_invoke_total = count_invoke_by_tables + count_invoke_by_direct + count_invoke_by_inline;")
+			v.add("printf(\"# dynamic count_invocation: total %ld\\n\", count_invoke_total);")
+			v.add("printf(\"by table: %ld (%.2f%%)\\n\", count_invoke_by_tables, 100.0*count_invoke_by_tables/count_invoke_total);")
+			v.add("printf(\"direct:   %ld (%.2f%%)\\n\", count_invoke_by_direct, 100.0*count_invoke_by_direct/count_invoke_total);")
+			v.add("printf(\"inlined:  %ld (%.2f%%)\\n\", count_invoke_by_inline, 100.0*count_invoke_by_inline/count_invoke_total);")
+		end
+
+		if self.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
+			v.add("printf(\"# dynamic attribute reads: %ld\\n\", count_attr_reads);")
+			v.add("printf(\"# dynamic isset checks: %ld\\n\", count_isset_checks);")
+		end
+
 		v.add("return 0;")
 		v.add("\}")
 	end
 
+	# Copile all C functions related to the [incr|decr]_ref features of the FFI
+	fun compile_nitni_global_ref_functions
+	do
+		var v = self.new_visitor
+		v.add """
+struct nitni_global_ref_list_t *nitni_global_ref_list;
+void initialize_nitni_global_refs() {
+	nitni_global_ref_list = (struct nitni_global_ref_list_t*)nit_alloc(sizeof(struct nitni_global_ref_list_t));
+	nitni_global_ref_list->head = NULL;
+	nitni_global_ref_list->tail = NULL;
+}
+
+void nitni_global_ref_add( struct nitni_ref *ref ) {
+	if ( nitni_global_ref_list->head == NULL ) {
+		nitni_global_ref_list->head = ref;
+		ref->prev = NULL;
+	} else {
+		nitni_global_ref_list->tail->next = ref;
+		ref->prev = nitni_global_ref_list->tail;
+	}
+	nitni_global_ref_list->tail = ref;
+
+	ref->next = NULL;
+}
+
+void nitni_global_ref_remove( struct nitni_ref *ref ) {
+	if ( ref->prev == NULL ) {
+		nitni_global_ref_list->head = ref->next;
+	} else {
+		ref->prev->next = ref->next;
+	}
+
+	if ( ref->next == NULL ) {
+		nitni_global_ref_list->tail = ref->prev;
+	} else {
+		ref->next->prev = ref->prev;
+	}
+}
+
+extern void nitni_global_ref_incr( struct nitni_ref *ref ) {
+	if ( ref->count == 0 ) /* not registered */
+	{
+		/* add to list */
+		nitni_global_ref_add( ref );
+	}
+
+	ref->count ++;
+}
+
+extern void nitni_global_ref_decr( struct nitni_ref *ref ) {
+	if ( ref->count == 1 ) /* was last reference */
+	{
+		/* remove from list */
+		nitni_global_ref_remove( ref );
+	}
+
+	ref->count --;
+}
+"""
+	end
+
 	# List of additional files required to compile (FFI)
 	var extern_bodies = new Array[ExternFile]
 
@@ -662,6 +957,8 @@ abstract class AbstractCompiler
 		end
 	end
 
+	fun finalize_ffi_for_module(mmodule: MModule) do mmodule.finalize_ffi(self)
+
 	# Division facility
 	# Avoid division by zero by returning the string "n/a"
 	fun div(a,b:Int):String
@@ -669,13 +966,6 @@ abstract class AbstractCompiler
 		if b == 0 then return "n/a"
 		return ((a*10000/b).to_f / 100.0).to_precision(2)
 	end
-
-	fun finalize_ffi_for_module(nmodule: AModule)
-	do
-		var visitor = new_visitor
-		nmodule.finalize_ffi(visitor, modelbuilder)
-		nmodule.finalize_nitni(visitor)
-	end
 end
 
 # A file unit (may be more than one file if
@@ -749,6 +1039,8 @@ abstract class AbstractCompilerVisitor
 		return self.send(callsite.mproperty, args)
 	end
 
+	fun native_array_instance(elttype: MType, length: RuntimeVariable): RuntimeVariable is abstract
+
 	fun calloc_array(ret_type: MType, arguments: Array[RuntimeVariable]) is abstract
 
 	fun native_array_def(pname: String, ret_type: nullable MType, arguments: Array[RuntimeVariable]) is abstract
@@ -886,7 +1178,7 @@ abstract class AbstractCompilerVisitor
 
 		var maybenull = recv.mcasttype isa MNullableType or recv.mcasttype isa MNullType
 		if maybenull then
-			self.add("if ({recv} == NULL) \{")
+			self.add("if (unlikely({recv} == NULL)) \{")
 			self.add_abort("Receiver is null")
 			self.add("\}")
 		end
@@ -986,6 +1278,17 @@ abstract class AbstractCompilerVisitor
 	# Generate a alloc-instance + init-attributes
 	fun init_instance(mtype: MClassType): RuntimeVariable is abstract
 
+	# Set a GC finalizer on `recv`, only if `recv` isa Finalizable
+	fun set_finalizer(recv: RuntimeVariable)
+	do
+		var mtype = recv.mtype
+		var finalizable_type = compiler.mainmodule.finalizable_type
+		if finalizable_type != null and not mtype.need_anchor and
+		   mtype.is_subtype(compiler.mainmodule, null, finalizable_type) then
+			add "gc_register_finalizer({recv});"
+		end
+	end
+
 	# Generate an integer value
 	fun int_instance(value: Int): RuntimeVariable
 	do
@@ -1032,7 +1335,11 @@ abstract class AbstractCompilerVisitor
 	# Request the presence of a global declaration
 	fun require_declaration(key: String)
 	do
-		self.writer.file.required_declarations.add(key)
+		var reqs = self.writer.file.required_declarations
+		if reqs.has(key) then return
+		reqs.add(key)
+		var node = current_node
+		if node != null then compiler.requirers_of_declarations[key] = node
 	end
 
 	# Add a declaration in the local-header
@@ -1083,16 +1390,16 @@ abstract class AbstractCompilerVisitor
 	# used by aborts, asserts, casts, etc.
 	fun add_abort(message: String)
 	do
-		self.add("fprintf(stderr, \"Runtime error: %s\", \"{message.escape_to_c}\");")
+		self.add("PRINT_ERROR(\"Runtime error: %s\", \"{message.escape_to_c}\");")
 		add_raw_abort
 	end
 
 	fun add_raw_abort
 	do
 		if self.current_node != null and self.current_node.location.file != null then
-			self.add("fprintf(stderr, \" (%s:%d)\\n\", \"{self.current_node.location.file.filename.escape_to_c}\", {current_node.location.line_start});")
+			self.add("PRINT_ERROR(\" (%s:%d)\\n\", \"{self.current_node.location.file.filename.escape_to_c}\", {current_node.location.line_start});")
 		else
-			self.add("fprintf(stderr, \"\\n\");")
+			self.add("PRINT_ERROR(\"\\n\");")
 		end
 		self.add("show_backtrace(1);")
 	end
@@ -1101,9 +1408,9 @@ abstract class AbstractCompilerVisitor
 	fun add_cast(value: RuntimeVariable, mtype: MType, tag: String)
 	do
 		var res = self.type_test(value, mtype, tag)
-		self.add("if (!{res}) \{")
+		self.add("if (unlikely(!{res})) \{")
 		var cn = self.class_name_string(value)
-		self.add("fprintf(stderr, \"Runtime error: Cast failed. Expected `%s`, got `%s`\", \"{mtype.to_s.escape_to_c}\", {cn});")
+		self.add("PRINT_ERROR(\"Runtime error: Cast failed. Expected `%s`, got `%s`\", \"{mtype.to_s.escape_to_c}\", {cn});")
 		self.add_raw_abort
 		self.add("\}")
 	end
@@ -1424,6 +1731,7 @@ redef class MMethodDef
 	# Can the body be inlined?
 	fun can_inline(v: VISITOR): Bool
 	do
+		if is_abstract then return true
 		var modelbuilder = v.compiler.modelbuilder
 		if modelbuilder.mpropdef2npropdef.has_key(self) then
 			var npropdef = modelbuilder.mpropdef2npropdef[self]
@@ -1489,33 +1797,52 @@ end
 redef class APropdef
 	fun compile_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
 	do
-		v.add("printf(\"NOT YET IMPLEMENTED {class_name} {mpropdef} at {location.to_s}\\n\");")
+		v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name} {mpropdef} at {location.to_s}\\n\");")
 		debug("Not yet implemented")
 	end
 
 	fun can_inline: Bool do return true
 end
 
-redef class AConcreteMethPropdef
+redef class AMethPropdef
 	redef fun compile_to_c(v, mpropdef, arguments)
 	do
-		for i in [0..mpropdef.msignature.arity[ do
-			var variable = self.n_signature.n_params[i].variable.as(not null)
-			v.assign(v.variable(variable), arguments[i+1])
+		if mpropdef.is_abstract then
+			var cn = v.class_name_string(arguments.first)
+			v.add("PRINT_ERROR(\"Runtime error: Abstract method `%s` called on `%s`\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
+			v.add_raw_abort
+			return
 		end
+
 		# Call the implicit super-init
 		var auto_super_inits = self.auto_super_inits
 		if auto_super_inits != null then
 			var args = [arguments.first]
 			for auto_super_init in auto_super_inits do
 				args.clear
-				for i in [0..auto_super_init.intro.msignature.arity+1[ do
+				for i in [0..auto_super_init.msignature.arity+1[ do
 					args.add(arguments[i])
 				end
-				v.send(auto_super_init, args)
+				v.compile_callsite(auto_super_init, args)
+			end
+		end
+
+		var n_block = n_block
+		if n_block != null then
+			for i in [0..mpropdef.msignature.arity[ do
+				var variable = self.n_signature.n_params[i].variable.as(not null)
+				v.assign(v.variable(variable), arguments[i+1])
+			end
+			v.stmt(n_block)
+		else if mpropdef.is_intern then
+			compile_intern_to_c(v, mpropdef, arguments)
+		else if mpropdef.is_extern then
+			if mpropdef.mproperty.is_init then
+				compile_externinit_to_c(v, mpropdef, arguments)
+			else
+				compile_externmeth_to_c(v, mpropdef, arguments)
 			end
 		end
-		v.stmt(self.n_block)
 	end
 
 	redef fun can_inline
@@ -1527,16 +1854,16 @@ redef class AConcreteMethPropdef
 		if nblock isa ABlockExpr and nblock.n_expr.length == 0 then return true
 		return false
 	end
-end
 
-redef class AInternMethPropdef
-	redef fun compile_to_c(v, mpropdef, arguments)
+	fun compile_intern_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
 	do
 		var pname = mpropdef.mproperty.name
 		var cname = mpropdef.mclassdef.mclass.name
 		var ret = mpropdef.msignature.return_mtype
 		if ret != null then
 			ret = v.resolve_for(ret, arguments.first)
+		else if mpropdef.mproperty.is_new then
+			ret = arguments.first.mcasttype
 		end
 		if pname != "==" and pname != "!=" then
 			v.adapt_signature(mpropdef, arguments)
@@ -1557,12 +1884,6 @@ redef class AInternMethPropdef
 			else if pname == "unary -" then
 				v.ret(v.new_expr("-{arguments[0]}", ret.as(not null)))
 				return
-			else if pname == "succ" then
-				v.ret(v.new_expr("{arguments[0]}+1", ret.as(not null)))
-				return
-			else if pname == "prec" then
-				v.ret(v.new_expr("{arguments[0]}-1", ret.as(not null)))
-				return
 			else if pname == "*" then
 				v.ret(v.new_expr("{arguments[0]} * {arguments[1]}", ret.as(not null)))
 				return
@@ -1611,10 +1932,10 @@ redef class AInternMethPropdef
 			else if pname == "object_id" then
 				v.ret(v.new_expr("(long){arguments.first}", ret.as(not null)))
 				return
-			else if pname == "+" then
+			else if pname == "successor" then
 				v.ret(v.new_expr("{arguments[0]} + {arguments[1]}", ret.as(not null)))
 				return
-			else if pname == "-" then
+			else if pname == "predecessor" then
 				v.ret(v.new_expr("{arguments[0]} - {arguments[1]}", ret.as(not null)))
 				return
 			else if pname == "==" then
@@ -1624,12 +1945,6 @@ redef class AInternMethPropdef
 				var res = v.equal_test(arguments[0], arguments[1])
 				v.ret(v.new_expr("!{res}", ret.as(not null)))
 				return
-			else if pname == "succ" then
-				v.ret(v.new_expr("{arguments[0]}+1", ret.as(not null)))
-				return
-			else if pname == "prec" then
-				v.ret(v.new_expr("{arguments[0]}-1", ret.as(not null)))
-				return
 			else if pname == "<" then
 				v.ret(v.new_expr("{arguments[0]} < {arguments[1]}", ret.as(not null)))
 				return
@@ -1728,6 +2043,9 @@ redef class AInternMethPropdef
 			else if pname == "atoi" then
 				v.ret(v.new_expr("atoi({arguments[0]});", ret.as(not null)))
 				return
+			else if pname == "init" then
+				v.ret(v.new_expr("(char*)nit_alloc({arguments[1]})", ret.as(not null)))
+				return
 			end
 		else if cname == "NativeArray" then
 			v.native_array_def(pname, ret, arguments)
@@ -1772,18 +2090,16 @@ redef class AInternMethPropdef
 			v.ret(v.new_expr("glob_argv[{arguments[1]}]", ret.as(not null)))
 			return
 		end
-		v.add("printf(\"NOT YET IMPLEMENTED {class_name}:{mpropdef} at {location.to_s}\\n\");")
+		v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name}:{mpropdef} at {location.to_s}\\n\");")
 		debug("Not implemented {mpropdef}")
 	end
-end
 
-redef class AExternMethPropdef
-	redef fun compile_to_c(v, mpropdef, arguments)
+	fun compile_externmeth_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
 	do
 		var externname
 		var nextern = self.n_extern
 		if nextern == null then
-			v.add("fprintf(stderr, \"NOT YET IMPLEMENTED nitni for {mpropdef} at {location.to_s}\\n\");")
+			v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED nitni for {mpropdef} at {location.to_s}\\n\");")
 			v.add("show_backtrace(1);")
 			return
 		end
@@ -1807,15 +2123,13 @@ redef class AExternMethPropdef
 			v.ret(res)
 		end
 	end
-end
 
-redef class AExternInitPropdef
-	redef fun compile_to_c(v, mpropdef, arguments)
+	fun compile_externinit_to_c(v: AbstractCompilerVisitor, mpropdef: MMethodDef, arguments: Array[RuntimeVariable])
 	do
 		var externname
 		var nextern = self.n_extern
 		if nextern == null then
-			v.add("printf(\"NOT YET IMPLEMENTED nitni for {mpropdef} at {location.to_s}\\n\");")
+			v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED nitni for {mpropdef} at {location.to_s}\\n\");")
 			v.add("show_backtrace(1);")
 			return
 		end
@@ -1838,18 +2152,55 @@ end
 redef class AAttrPropdef
 	redef fun compile_to_c(v, mpropdef, arguments)
 	do
-		if arguments.length == 1 then
-			var res = v.read_attribute(self.mpropdef.mproperty, arguments.first)
+		if mpropdef == mreadpropdef then
+			assert arguments.length == 1
+			var res
+			if is_lazy then
+				var nexpr = n_expr
+				assert nexpr != null
+				var set
+				var ret = self.mpropdef.static_mtype
+				var useiset = ret.ctype == "val*" and not ret isa MNullableType
+				var guard = self.mlazypropdef.mproperty
+				if useiset then
+					set = v.isset_attribute(self.mpropdef.mproperty, arguments.first)
+				else
+					set = v.read_attribute(guard, arguments.first)
+				end
+				v.add("if(likely({set})) \{")
+				res = v.read_attribute(self.mpropdef.mproperty, arguments.first)
+				v.add("\} else \{")
+				var value = v.expr(nexpr, self.mpropdef.static_mtype)
+				v.write_attribute(self.mpropdef.mproperty, arguments.first, value)
+				v.assign(res, value)
+				if not useiset then
+					var true_v = v.new_expr("1", v.bool_type)
+					v.write_attribute(guard, arguments.first, true_v)
+				end
+				v.add("\}")
+			else
+				res = v.read_attribute(self.mpropdef.mproperty, arguments.first)
+			end
 			v.assign(v.frame.returnvar.as(not null), res)
-		else
+		else if mpropdef == mwritepropdef then
+			assert arguments.length == 2
 			v.write_attribute(self.mpropdef.mproperty, arguments.first, arguments[1])
+			if is_lazy then
+				var ret = self.mpropdef.static_mtype
+				var useiset = ret.ctype == "val*" and not ret isa MNullableType
+				if not useiset then
+					v.write_attribute(self.mlazypropdef.mproperty, arguments.first, v.new_expr("1", v.bool_type))
+				end
+			end
+		else
+			abort
 		end
 	end
 
 	fun init_expr(v: AbstractCompilerVisitor, recv: RuntimeVariable)
 	do
 		var nexpr = self.n_expr
-		if nexpr != null then
+		if nexpr != null and not is_lazy then
 			var oldnode = v.current_node
 			v.current_node = self
 			var old_frame = v.frame
@@ -1885,17 +2236,17 @@ redef class AClassdef
 		if mpropdef == self.mfree_init then
 			var super_inits = self.super_inits
 			if super_inits != null then
-				assert arguments.length == 1
+				var args_of_super = arguments
+				if arguments.length > 1 then args_of_super = [arguments.first]
 				for su in super_inits do
-					v.send(su, arguments)
+					v.send(su, args_of_super)
 				end
-				return
 			end
 			var recv = arguments.first
 			var i = 1
 			# Collect undefined attributes
 			for npropdef in self.n_propdefs do
-				if npropdef isa AAttrPropdef and npropdef.n_expr == null then
+				if npropdef isa AAttrPropdef and npropdef.n_expr == null and not npropdef.noinit then
 					v.write_attribute(npropdef.mpropdef.mproperty, recv, arguments[i])
 					i += 1
 				end
@@ -1906,21 +2257,12 @@ redef class AClassdef
 	end
 end
 
-redef class ADeferredMethPropdef
-	redef fun compile_to_c(v, mpropdef, arguments) do
-		var cn = v.class_name_string(arguments.first)
-		v.add("fprintf(stderr, \"Runtime error: Abstract method `%s` called on `%s`\", \"{mpropdef.mproperty.name.escape_to_c}\", {cn});")
-		v.add_raw_abort
-	end
-	redef fun can_inline do return true
-end
-
 redef class AExpr
 	# Try to compile self as an expression
 	# Do not call this method directly, use `v.expr` instead
 	private fun expr(v: AbstractCompilerVisitor): nullable RuntimeVariable
 	do
-		v.add("printf(\"NOT YET IMPLEMENTED {class_name}:{location.to_s}\\n\");")
+		v.add("PRINT_ERROR(\"NOT YET IMPLEMENTED {class_name}:{location.to_s}\\n\");")
 		var mtype = self.mtype
 		if mtype == null then
 			return null
@@ -2139,29 +2481,29 @@ redef class AForExpr
 		var cl = v.expr(self.n_expr, null)
 		var it_meth = self.method_iterator
 		assert it_meth != null
-		var it = v.send(it_meth, [cl])
+		var it = v.compile_callsite(it_meth, [cl])
 		assert it != null
 		v.add("for(;;) \{")
 		var isok_meth = self.method_is_ok
 		assert isok_meth != null
-		var ok = v.send(isok_meth, [it])
+		var ok = v.compile_callsite(isok_meth, [it])
 		assert ok != null
 		v.add("if(!{ok}) break;")
 		if self.variables.length == 1 then
 			var item_meth = self.method_item
 			assert item_meth != null
-			var i = v.send(item_meth, [it])
+			var i = v.compile_callsite(item_meth, [it])
 			assert i != null
 			v.assign(v.variable(variables.first), i)
 		else if self.variables.length == 2 then
 			var key_meth = self.method_key
 			assert key_meth != null
-			var i = v.send(key_meth, [it])
+			var i = v.compile_callsite(key_meth, [it])
 			assert i != null
 			v.assign(v.variable(variables[0]), i)
 			var item_meth = self.method_item
 			assert item_meth != null
-			i = v.send(item_meth, [it])
+			i = v.compile_callsite(item_meth, [it])
 			assert i != null
 			v.assign(v.variable(variables[1]), i)
 		else
@@ -2171,7 +2513,7 @@ redef class AForExpr
 		v.add("CONTINUE_{v.escapemark_name(escapemark)}: (void)0;")
 		var next_meth = self.method_next
 		assert next_meth != null
-		v.send(next_meth, [it])
+		v.compile_callsite(next_meth, [it])
 		v.add("\}")
 		v.add("BREAK_{v.escapemark_name(escapemark)}: (void)0;")
 	end
@@ -2183,7 +2525,7 @@ redef class AAssertExpr
 		if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return
 
 		var cond = v.expr_bool(self.n_expr)
-		v.add("if (!{cond}) \{")
+		v.add("if (unlikely(!{cond})) \{")
 		v.stmt(self.n_else)
 		var nid = self.n_id
 		if nid != null then
@@ -2314,7 +2656,7 @@ redef class ACrangeExpr
 		var i2 = v.expr(self.n_expr2, null)
 		var mtype = self.mtype.as(MClassType)
 		var res = v.init_instance(mtype)
-		var it = v.send(v.get_property("init", res.mtype), [res, i1, i2])
+		var it = v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
 		return res
 	end
 end
@@ -2326,7 +2668,7 @@ redef class AOrangeExpr
 		var i2 = v.expr(self.n_expr2, null)
 		var mtype = self.mtype.as(MClassType)
 		var res = v.init_instance(mtype)
-		var it = v.send(v.get_property("without_last", res.mtype), [res, i1, i2])
+		var it = v.compile_callsite(init_callsite.as(not null), [res, i1, i2])
 		return res
 	end
 end
@@ -2368,7 +2710,9 @@ redef class AAsNotnullExpr
 		var i = v.expr(self.n_expr, null)
 		if v.compiler.modelbuilder.toolcontext.opt_no_check_assert.value then return i
 
-		v.add("if ({i} == NULL) \{")
+		if i.mtype.ctype != "val*" then return i
+
+		v.add("if (unlikely({i} == NULL)) \{")
 		v.add_abort("Cast failed")
 		v.add("\}")
 		return i
@@ -2405,7 +2749,7 @@ redef class ASendExpr
 	do
 		var recv = v.expr(self.n_expr, null)
 		var args = [recv]
-		for a in self.raw_arguments.as(not null) do
+		for a in self.raw_arguments do
 			args.add(v.expr(a, null))
 		end
 		return v.compile_callsite(self.callsite.as(not null), args)
@@ -2417,7 +2761,7 @@ redef class ASendReassignFormExpr
 	do
 		var recv = v.expr(self.n_expr, null)
 		var args = [recv]
-		for a in self.raw_arguments.as(not null) do
+		for a in self.raw_arguments do
 			args.add(v.expr(a, null))
 		end
 		var value = v.expr(self.n_value, null)
@@ -2446,7 +2790,7 @@ redef class ASuperExpr
 		if callsite != null then
 			# Add additionnals arguments for the super init call
 			if args.length == 1 then
-				for i in [0..callsite.mproperty.intro.msignature.arity[ do
+				for i in [0..callsite.msignature.arity[ do
 					args.add(v.frame.arguments[i+1])
 				end
 			end
@@ -2460,7 +2804,7 @@ redef class ASuperExpr
 		end
 
 		# stantard call-next-method
-		return v.supercall(v.frame.mpropdef.as(MMethodDef), recv.mtype.as(MClassType), args)
+		return v.supercall(mpropdef.as(not null), recv.mtype.as(MClassType), args)
 	end
 end
 
@@ -2470,13 +2814,18 @@ redef class ANewExpr
 		var mtype = self.mtype.as(MClassType)
 		var recv
 		var ctype = mtype.ctype
-		if ctype == "val*" then
+		if mtype.mclass.name == "NativeArray" then
+			assert self.n_args.n_exprs.length == 1
+			var l = v.expr(self.n_args.n_exprs.first, null)
+			assert mtype isa MGenericType
+			var elttype = mtype.arguments.first
+			return v.native_array_instance(elttype, l)
+		else if ctype == "val*" then
 			recv = v.init_instance(mtype)
 		else if ctype == "void*" then
 			recv = v.new_expr("NULL/*special!*/", mtype)
 		else
-			debug("cannot new {mtype}")
-			abort
+			recv = v.new_expr("({ctype})0/*special!*/", mtype)
 		end
 		var args = [recv]
 		for a in self.n_args.n_exprs do
@@ -2563,6 +2912,7 @@ redef class MModule
 				properties.add_all(self.properties(parent))
 			end
 			for mclassdef in mclass.mclassdefs do
+				if not self.in_importation <= mclassdef.mmodule then continue
 				for mprop in mclassdef.intro_mproperties do
 					properties.add(mprop)
 				end
@@ -2572,15 +2922,50 @@ redef class MModule
 		return properties_cache[mclass]
 	end
 	private var properties_cache: Map[MClass, Set[MProperty]] = new HashMap[MClass, Set[MProperty]]
+
+	# Write FFI and nitni results to file
+	fun finalize_ffi(c: AbstractCompiler) do end
+
+	# Give requided addinional system libraries (as given to LD_LIBS)
+	# Note: can return null instead of an empty set
+	fun collect_linker_libs: nullable Set[String] do return null
 end
 
-redef class AModule
-	# Does this module use the legacy native interface?
-	fun uses_legacy_ni: Bool is abstract
+# Create a tool context to handle options and paths
+var toolcontext = new ToolContext
+
+var opt_mixins = new OptionArray("Additionals module to min-in", "-m")
+toolcontext.option_context.add_option(opt_mixins)
 
-	# Write FFI results to file
-	fun finalize_ffi(v: AbstractCompilerVisitor, modelbuilder: ModelBuilder) is abstract
+toolcontext.tooldescription = "Usage: nitg [OPTION]... file.nit...\nCompiles Nit programs."
 
-	# Write nitni results to file
-	fun finalize_nitni(v: AbstractCompilerVisitor) is abstract
+# We do not add other options, so process them now!
+toolcontext.process_options(args)
+
+# We need a model to collect stufs
+var model = new Model
+# An a model builder to parse files
+var modelbuilder = new ModelBuilder(model, toolcontext)
+
+var arguments = toolcontext.option_context.rest
+if arguments.length > 1 and toolcontext.opt_output.value != null then
+	print "Error: --output needs a single source file. Do you prefer --dir?"
+	exit 1
 end
+
+# Here we load an process all modules passed on the command line
+var mmodules = modelbuilder.parse(arguments)
+var mixins = modelbuilder.parse(opt_mixins.value)
+
+if mmodules.is_empty then return
+modelbuilder.run_phases
+
+for mmodule in mmodules do
+	toolcontext.info("*** PROCESS {mmodule} ***", 1)
+	var ms = [mmodule]
+	if not mixins.is_empty then
+		ms.add_all mixins
+	end
+	toolcontext.run_global_phases(ms)
+end
+