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Wasm: replace a local.set/get pair with a local.tee

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This commit is contained in:
Brian Carroll 2021-12-30 15:38:06 +00:00
parent acade33497
commit 0912f8fd45
1 changed files with 1 additions and 2 deletions
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3
compiler/gen_wasm/src/backend.rs
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@ -1044,12 +1044,11 @@ impl<'a> WasmBackend<'a> {
// Save the allocation address to a temporary local variable
let local_id = self.storage.create_anonymous_local(ValueType::I32);
self.code_builder.set_local(local_id);
self.code_builder.tee_local(local_id);
// Write the initial refcount
let refcount_offset = extra_bytes - PTR_SIZE;
let encoded_refcount = (initial_refcount as i32) - 1 + i32::MIN;
self.code_builder.get_local(local_id);
self.code_builder.i32_const(encoded_refcount);
self.code_builder.i32_store(Align::Bytes4, refcount_offset);