fix element offset, missing code for c++, missing testing argument

Author: cpetig

crates/core/src/abi.rs

@@ -2186,7 +2186,7 @@ impl<'a, B: Bindgen> Generator<'a, B> {
                     self.push_block();
                     self.emit(&IterBasePointer);
                     let elemaddr = self.stack.pop().unwrap();
-                    self.read_from_memory(ty, elemaddr, Default::default());
+                    self.read_from_memory(ty, elemaddr, offset);
                     self.finish_block(1);
                     self.stack.push(addr.clone());
                     self.emit(&FixedSizeListLiftFromMemory {

crates/cpp/src/lib.rs

@@ -2703,7 +2703,15 @@ impl<'a, 'b> Bindgen for FunctionBindgen<'a, 'b> {
                 self.push_str("\n}\n}\n");
                 results.push(vec);
             }
-            abi::Instruction::FixedSizeListLower { .. } => todo!(),
+            abi::Instruction::FixedSizeListLower {
+                element: _,
+                size,
+                id: _,
+            } => {
+                for i in 0..(*size as usize) {
+                    results.push(format!("{}[{i}]", operands[0]));
+                }
+            }
             abi::Instruction::FixedSizeListLowerToMemory {
                 element,
                 size: elemsize,

crates/test/src/runner.rs

@@ -45,7 +45,8 @@ impl TestRunner {
         for arg in self.args.iter() {
             ret.arg(arg);
         }
-        ret.arg("--invoke=run()");
+        ret.arg("--invoke=run()")
+            .arg("-Wcomponent-model-fixed-size-list");
         ret
     }
 }