Fix test warnings

Author: arjunr2

cranelift/filetests/src/function_runner.rs

@@ -292,7 +292,7 @@ impl TestFileCompiler {
                         let ext_func = &cursor.func.dfg.ext_funcs[*func_ref];
                         let hostcall_addr = match &ext_func.name {
                             ExternalName::TestCase(tc) if tc.raw() == b"__cranelift_throw" => {
-                                Some(__cranelift_throw as usize)
+                                Some(__cranelift_throw as *const () as usize)
                             }
                             _ => None,
                         };

crates/wasmtime/src/runtime/rr/backend.rs

@@ -594,7 +594,7 @@ mod tests {
                 Ok(())
             },
             |replayer| {
-                replayer.next_event_and(|e: LowerFlatEntryEvent| Ok(()))?;
+                replayer.next_event_and(|_e: LowerFlatEntryEvent| Ok(()))?;
                 replayer.next_event_and(|e: LowerFlatReturnEvent| {
                     assert!(e.0.ret().is_ok());
                     Ok(())

crates/wasmtime/src/runtime/vm/libcalls.rs

@@ -233,7 +233,7 @@ fn memory_grow(
         // Record/replay hook for memory.grow
         rr::core_hooks::record_and_replay_validate_memory_grow(
             match &result {
-                Some(a) => a.0 as u32,
+                Some(a) => u32::try_from(a.0)?,
                 None => u32::MAX,
             },
             store,
@@ -309,7 +309,7 @@ unsafe fn table_grow_func_ref(
         // Record/replay hook for table.grow
         rr::core_hooks::record_and_replay_validate_table_grow(
             match &result {
-                Some(a) => a.0 as u32,
+                Some(a) => u32::try_from(a.0)?,
                 None => u32::MAX,
             },
             store,
@@ -352,7 +352,7 @@ fn table_grow_gc_ref(
         // Record/replay hook for table.grow
         rr::core_hooks::record_and_replay_validate_table_grow(
             match &result {
-                Some(a) => a.0 as u32,
+                Some(a) => u32::try_from(a.0)?,
                 None => u32::MAX,
             },
             store,
@@ -394,7 +394,7 @@ unsafe fn table_grow_cont_obj(
         // Record/replay hook for table.grow
         rr::core_hooks::record_and_replay_validate_table_grow(
             match &result {
-                Some(a) => a.0 as u32,
+                Some(a) => u32::try_from(a.0)?,
                 None => u32::MAX,
             },
             store,