builder,wasm: fix pointer size to 4 for -b wasm before the checker stage (#26281)

Krchi · web-flow · commit f77aae2c23c3 · 2026-01-08T06:12:23.000+02:00
diff --git a/vlib/v/builder/builder.v b/vlib/v/builder/builder.v
@@ -62,7 +62,7 @@ pub fn new_builder(pref_ &pref.Preferences) Builder {
 	if pref_.use_color == .never {
 		util.emanager.set_support_color(false)
 	}
-	table.pointer_size = if pref_.m64 { 8 } else { 4 }
+	table.pointer_size = if pref_.m64 && pref_.backend != .wasm { 8 } else { 4 }
 	mut msvc := MsvcResult{}
 	if pref_.ccompiler == 'msvc' {
 		$if windows {
diff --git a/vlib/v/gen/wasm/gen.v b/vlib/v/gen/wasm/gen.v
@@ -1498,7 +1498,6 @@ pub fn gen(files []&ast.File, mut table ast.Table, out_name string, w_pref &pref
 		stack_top: stack_top
 		data_base: calc_align(stack_top + 1, 16)
 	}
-	g.table.pointer_size = 4
 	g.mod.assign_memory('memory', true, 1, none)
 
 	if g.pref.is_debug {
diff --git a/vlib/v/gen/wasm/tests/cast.vv b/vlib/v/gen/wasm/tests/cast.vv
@@ -0,0 +1,3 @@
+fn main() {
+	println(u32(usize(0)))
+}
diff --git a/vlib/v/gen/wasm/tests/cast.vv.out b/vlib/v/gen/wasm/tests/cast.vv.out
@@ -0,0 +1 @@
+0

Original file line number	Diff line number	Diff line change
`@@ -62,7 +62,7 @@ pub fn new_builder(pref_ &pref.Preferences) Builder {`
`62`	`62`	`if pref_.use_color == .never {`
`63`	`63`	`util.emanager.set_support_color(false)`
`64`	`64`	`}`
`65`		`- table.pointer_size = if pref_.m64 { 8 } else { 4 }`
	`65`	`+ table.pointer_size = if pref_.m64 && pref_.backend != .wasm { 8 } else { 4 }`
`66`	`66`	`mut msvc := MsvcResult{}`
`67`	`67`	`if pref_.ccompiler == 'msvc' {`
`68`	`68`	`$if windows {`
Original file line number	Diff line number	Diff line change
`@@ -1498,7 +1498,6 @@ pub fn gen(files []&ast.File, mut table ast.Table, out_name string, w_pref &pref`
`1498`	`1498`	`stack_top: stack_top`
`1499`	`1499`	`data_base: calc_align(stack_top + 1, 16)`
`1500`	`1500`	`}`
`1501`		`- g.table.pointer_size = 4`
`1502`	`1501`	`g.mod.assign_memory('memory', true, 1, none)`
`1503`	`1502`
`1504`	`1503`	`if g.pref.is_debug {`