remove alignment bump again

compiler/gen_llvm/src/llvm/build_str.rs

@@ -268,25 +268,19 @@ fn decode_from_utf8_result<'a, 'ctx, 'env>(
     let ctx = env.context;
 
     let fields = match env.ptr_bytes {
-        8 => [
+        8 | 4 => [
             env.ptr_int().into(),
             super::convert::zig_str_type(env).into(),
             env.context.bool_type().into(),
             ctx.i8_type().into(),
         ],
-        4 => [
-            super::convert::zig_str_type(env).into(),
-            env.ptr_int().into(),
-            env.context.bool_type().into(),
-            ctx.i8_type().into(),
-        ],
         _ => unreachable!(),
     };
 
     let record_type = env.context.struct_type(&fields, false);
 
     match env.ptr_bytes {
-        8 => {
+        8 | 4 => {
             let zig_struct = builder
                 .build_load(pointer, "load_utf8_validate_bytes_result")
                 .into_struct_value();
@@ -309,20 +303,6 @@ fn decode_from_utf8_result<'a, 'ctx, 'env>(
 
             struct_from_fields(env, record_type, values.iter().copied().enumerate())
         }
-        4 => {
-            let result_ptr_cast = env
-                .builder
-                .build_bitcast(
-                    pointer,
-                    record_type.ptr_type(AddressSpace::Generic),
-                    "to_unnamed",
-                )
-                .into_pointer_value();
-
-            builder
-                .build_load(result_ptr_cast, "load_utf8_validate_bytes_result")
-                .into_struct_value()
-        }
         _ => unreachable!(),
     }
 }

compiler/mono/src/layout.rs

@@ -1158,8 +1158,8 @@ impl<'a> Builtin<'a> {
             //
             // In webassembly, For that to be safe
             // they must be aligned to allow such access
-            List(_) | EmptyList => pointer_size.max(8),
-            Str | EmptyStr => pointer_size.max(8),
+            List(_) | EmptyList => pointer_size,
+            Str | EmptyStr => pointer_size,
         }
     }
 

compiler/test_gen/src/gen_primitives.rs

@@ -2531,6 +2531,8 @@ fn pattern_match_unit_tag() {
     );
 }
 
+// see for why this is disabled on wasm32 https://github.com/rtfeldman/roc/issues/1687
+#[cfg(not(feature = "wasm-cli-run"))]
 #[test]
 fn mirror_llvm_alignment_padding() {
     // see https://github.com/rtfeldman/roc/issues/1569