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Use table.fill in externref-xform (TODO) #3446

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Use table.fill in externref-xform (TODO) #3446

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15 changes: 4 additions & 11 deletions crates/externref-xform/src/lib.rs
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Expand Up @@ -648,19 +648,12 @@ impl Transform<'_> {
// Note that we pave over all our stack slots with `ref.null` to ensure
// that the table doesn't accidentally hold a strong reference to items
// no longer in use by our wasm instance.
//
// TODO: use `table.fill` once that's spec'd
if externref_stack > 0 {
for i in 0..externref_stack {
body.local_get(fp);
if i > 0 {
body.i32_const(i).binop(BinaryOp::I32Add);
}
body.ref_null(ValType::Externref);
body.table_set(self.table);
}

body.local_get(fp)
.ref_null(ValType::Externref)
.i32_const(externref_stack)
.table_fill(self.table)
.local_get(fp)
.i32_const(externref_stack)
.binop(BinaryOp::I32Add)
.global_set(self.stack_pointer);
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3 changes: 2 additions & 1 deletion crates/externref-xform/tests/anyref-param.wat
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Expand Up @@ -25,7 +25,8 @@
call $foo
local.get 1
ref.null extern
table.set 0
i32.const 1
table.fill 0
local.get 1
i32.const 1
i32.add
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3 changes: 2 additions & 1 deletion crates/externref-xform/tests/mixed-export.wat
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Expand Up @@ -34,7 +34,8 @@
call $a
local.get 5
ref.null extern
table.set 0
i32.const 1
table.fill 0
local.get 5
i32.const 1
i32.add
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