Don't shadow the provided stringify! macro in a wasm code size test case

Author: fitzgen

src/test/run-make/wasm-stringify-ints-small/foo.rs

@@ -2,22 +2,14 @@
 
 extern "C" {
     fn observe(ptr: *const u8, len: usize);
-
-    fn get_u8() -> u8;
-    fn get_i8() -> i8;
-    fn get_u16() -> u16;
-    fn get_i16() -> i16;
-    fn get_u32() -> u32;
-    fn get_i32() -> i32;
-    fn get_u64() -> u64;
-    fn get_i64() -> i64;
-    fn get_usize() -> usize;
-    fn get_isize() -> isize;
 }
 
-macro_rules! stringify {
-    ( $($f:ident)* ) => {
+macro_rules! s {
+    ( $( $f:ident -> $t:ty );* $(;)* ) => {
         $(
+            extern "C" {
+                fn $f() -> $t;
+            }
             let s = $f().to_string();
             observe(s.as_ptr(), s.len());
         )*
@@ -26,14 +18,16 @@ macro_rules! stringify {
 
 #[no_mangle]
 pub unsafe extern "C" fn foo() {
-    stringify!(get_u8);
-    stringify!(get_i8);
-    stringify!(get_u16);
-    stringify!(get_i16);
-    stringify!(get_u32);
-    stringify!(get_i32);
-    stringify!(get_u64);
-    stringify!(get_i64);
-    stringify!(get_usize);
-    stringify!(get_isize);
+    s! {
+        get_u8 -> u8;
+        get_i8 -> i8;
+        get_u16 -> u16;
+        get_i16 -> i16;
+        get_u32 -> u32;
+        get_i32 -> i32;
+        get_u64 -> u64;
+        get_i64 -> i64;
+        get_usize -> usize;
+        get_isize -> isize;
+    }
 }