Bench API: Enable Pulley and allow recompiling with the same bench engine (bytecodealliance#9877)

* bench-api: Allow recompiling with the same engine

* Enable Pulley in the bench API

Author: fitzgen

crates/bench-api/Cargo.toml

@@ -22,7 +22,7 @@ doctest = false
 anyhow = { workspace = true }
 shuffling-allocator = { version = "1.1.1", optional = true }
 target-lexicon = { workspace = true }
-wasmtime = { workspace = true, default-features = true, features = ["winch"] }
+wasmtime = { workspace = true, default-features = true, features = ["winch", "pulley"] }
 wasmtime-cli-flags = { workspace = true, default-features = true, features = [
     "cranelift",
 ] }

crates/bench-api/src/lib.rs

@@ -484,10 +484,7 @@ impl BenchState {
     }
 
     fn compile(&mut self, bytes: &[u8]) -> Result<()> {
-        assert!(
-            self.module.is_none(),
-            "create a new engine to repeat compilation"
-        );
+        self.module = None;
 
         (self.compilation_start)(self.compilation_timer);
         let module = Module::from_binary(self.linker.engine(), bytes)?;
@@ -498,6 +495,8 @@ impl BenchState {
     }
 
     fn instantiate(&mut self) -> Result<()> {
+        self.store_and_instance = None;
+
         let module = self
             .module
             .as_ref()