add benchmark

benchmarks/wasm/even_odd.rs

@@ -0,0 +1,18 @@
+#[no_mangle]
+#[inline(never)]
+fn is_even(n: u32) -> bool {
+    if n == 0 { true }
+    else { is_odd(n - 1) }
+}
+
+#[no_mangle]
+#[inline(never)]
+fn is_odd(n: u32) -> bool {
+    if n == 0 { false }
+    else { is_even(n - 1) }
+}
+
+#[no_mangle]
+fn real_main() -> bool {
+    is_even(12)
+}

benchmarks/wasm/even_odd.wat

@@ -0,0 +1,35 @@
+(module
+  (type (;0;) (func (param i32) (result i32)))
+  (type (;1;) (func (result i32)))
+  (func (;0;) (type 0) (param i32) (result i32)
+    block  ;; label = @1
+      local.get 0
+      br_if 0 (;@1;)
+      i32.const 1
+      return
+    end
+    local.get 0
+    i32.const -1
+    i32.add
+    call 1)
+  (func (;1;) (type 0) (param i32) (result i32)
+    block  ;; label = @1
+      local.get 0
+      br_if 0 (;@1;)
+      i32.const 0
+      return
+    end
+    local.get 0
+    i32.const -1
+    i32.add
+    call 0)
+  (func (;2;) (type 1) (result i32)
+    i32.const 0
+    call 1)
+  (start 2)
+  (table (;0;) 1 1 funcref)
+  (memory (;0;) 16)
+  (export "memory" (memory 0))
+  (export "is_even" (func 0))
+  (export "is_odd" (func 1))
+  (export "real_main" (func 2)))