native: fix tests, address comments and a little cleaner macho

vlib/v/checker/checker.v

@@ -2072,9 +2072,8 @@ pub fn (mut c Checker) fn_call(mut call_expr ast.CallExpr) ast.Type {
 	}
 	if !found && c.pref.backend == .native {
 		if fn_name in native.builtins {
-			found = true
 			c.table.fns[fn_name].usages++
-			return ast.string_type
+			return ast.void_type
 		}
 	}
 	if !found && c.pref.is_script && !found {

vlib/v/gen/native/amd64.v

@@ -529,7 +529,9 @@ fn (mut g Gen) assign_stmt(node ast.AssignStmt) {
 				g.allocate_var(name, 4, 0)
 				// `mov DWORD PTR [rbp-0x8],eax`
 				offset := g.get_var_offset(name)
-				println('infix assignment $name offset=$offset.hex2()')
+				if g.pref.is_verbose {
+					println('infix assignment $name offset=$offset.hex2()')
+				}
 				g.mov_reg_to_rbp(offset, .eax)
 			}
 			ast.StructInit {

vlib/v/gen/native/arm64.v

@@ -69,7 +69,6 @@ pub fn (mut g Gen) fn_decl_arm64(node ast.FnDecl) {
 }
 
 fn (mut g Gen) gen_arm64_helloworld() {
-	// ADD THE CODE HERE THIS GOES INTO THE STMTS THING
 	// g.write32(0x77777777)
 	// assembly
 	g.mov_arm(.x0, 1)

vlib/v/gen/native/gen.v

@@ -106,7 +106,7 @@ pub fn (mut g Gen) create_executable() {
 	unsafe { f.write_ptr(g.buf.data, g.buf.len) }
 	f.close()
 	if g.pref.is_verbose {
-		println('\narm64 mach-o binary has been successfully generated')
+		println('\n$g.out_name: native binary has been successfully generated')
 	}
 }
 

vlib/v/gen/native/macho.v

@@ -13,6 +13,7 @@ const (
 	macho_d_size             = 0x50
 	lc_symtab                = 0x2
 	lc_dymsymtab             = 0xB
+	mh_object                = 1
 )
 
 struct Symbol {
@@ -44,9 +45,10 @@ pub fn (mut g Gen) generate_macho_header() {
 		g.write32(0x01000007) // CPU_TYPE_X64
 		g.write32(0x00000003) // CPU_SUBTYPE_X64
 	}
-	g.write32(0x00000001) // MH_OBJECT
-	g.write32(0x00000004) // # of load commands
-	g.write32(0x118) // size of load commands
+	g.write32(native.mh_object) // MH_OBJECT
+	text_offset := 0x138
+	g.write32(4) // # of load commands
+	g.write32(text_offset - 0x20) // size of load commands // 0x138-0x20
 	// g.write32(0x00002000) // MH_SUBSECTIONS_VIA_SYMBOLS
 	g.write32(0) // MH_SUBSECTIONS_VIA_SYMBOLS
 	g.write32(0) // reserved
@@ -56,7 +58,7 @@ pub fn (mut g Gen) generate_macho_header() {
 	g.zeroes(16) // segment name
 	g.write64(0) // VM address
 	g.write64(0x25) // VM size
-	g.write64(0x138) // file offset
+	g.write64(text_offset) // file offset
 	g.write64(0x25) // file size
 	g.write32(0x7) // max vm protection
 	g.write32(0x7) // initial vm protection
@@ -67,7 +69,7 @@ pub fn (mut g Gen) generate_macho_header() {
 	g.write_string_with_padding('__TEXT', 16) // segment name
 	g.write64(0) // address
 	g.write64(0x25) // size
-	g.write32(0x138) // offset
+	g.write32(text_offset) // offset
 	g.write32(0x4) // alignment
 	g.write32(0x160) // relocation offset
 	g.write32(0x1) // # of relocations
@@ -97,9 +99,17 @@ pub fn (mut g Gen) generate_macho_header() {
 	for _ in 0 .. 12 {
 		g.write32(0)
 	}
+	if g.pref.is_verbose {
+		println('commands size = $g.buf.len')
+		if g.buf.len != 0x138 {
+			println('macho: invalid header size')
+		}
+	}
 
 	if g.pref.arch == .arm64 {
 		g.gen_arm64_helloworld()
+	} else {
+		// do nothing
 	}
 }
 
@@ -168,6 +178,9 @@ pub fn (mut g Gen) zeroes(n int) {
 }
 
 fn (mut g Gen) write_relocs() {
+	if g.pref.is_verbose {
+		println('relocs at $g.buf.len should be 0x160')
+	}
 	g.write32(0x8)
 	g.write32(0x2d000003)
 }

vlib/v/gen/native/tests/expressions.vv

@@ -1,14 +1,34 @@
 fn print_number(n int) {
-    if n == 0 { println('0') }
-    if n == 1 { println('1') }
-    if n == 2 { println('2') }
-    if n == 3 { println('3') }
-    if n == 4 { println('4') }
-    if n == 5 { println('5') }
-    if n == 6 { println('6') }
-    if n == 7 { println('7') }
-    if n == 8 { println('8') }
-    if n == 9 { println('9') }
+	if n == 0 {
+		println('0')
+	}
+	if n == 1 {
+		println('1')
+	}
+	if n == 2 {
+		println('2')
+	}
+	if n == 3 {
+		println('3')
+	}
+	if n == 4 {
+		println('4')
+	}
+	if n == 5 {
+		println('5')
+	}
+	if n == 6 {
+		println('6')
+	}
+	if n == 7 {
+		println('7')
+	}
+	if n == 8 {
+		println('8')
+	}
+	if n == 9 {
+		println('9')
+	}
 }
 
 struct User {
@@ -16,7 +36,6 @@ struct User {
 }
 
 fn print_user(u User) {
-
 }
 
 fn test_add() {

vlib/v/gen/native/tests/general.vv

@@ -6,8 +6,8 @@ fn if_test() {
 		if b == 2 {
 			println('b == 2')
 		}
-		//if b != 2 {
-			//println('b != 2')
+		// if b != 2 {
+		// println('b != 2')
 		//}
 	}
 	if a == 2 {
@@ -35,22 +35,27 @@ fn foo(a int) {
 	if a == 7 {
 		println('a == 7')
 	}
-	a++
-	if a == 2 {
-		println('a == 2')
+	/*
+	// native gen doesnt support more than one variable
+	mut b := a + 1
+	if b == 2 {
+		println('b == 2')
 	}
-	if a == 3 {
-		println('a == 3')
+	if b == 3 {
+		println('b == 3')
 	}
-
+	if b == 8 {
+		println('b == 8')
+	}
+	*/
 }
 
 fn args() {
 	x := 7
 	println('===args===')
-	foo(1)
-	foo(x)
-	foo(2)
+	foo(1) // prints 1 2
+	foo(x) // prints 7 8
+	foo(2) // prints 3
 }
 
 /*
@@ -69,9 +74,8 @@ fn expr() {
 }
 */
 
-
 struct User {
-	age int
+	age       int
 	nr_orders int
 }
 
@@ -79,5 +83,5 @@ fn main() {
 	if_test()
 	loop()
 	args()
-	//expr()
+	// expr()
 }

vlib/v/gen/native/tests/general.vv.out

@@ -9,9 +9,6 @@ hello
 ===args===
 foo:
 a == 1
-a == 2
 foo:
 a == 7
 foo:
-a == 3
-

vlib/v/gen/native/tests/simple_fn_calls.vv

@@ -1,4 +1,4 @@
-fn print_greeting(){
+fn print_greeting() {
 	println('hello from native V')
 }