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Wasm bugfix: allocate using the heap alignment, not the stack alignment

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This commit is contained in:
Brian Carroll 2021-12-30 15:37:09 +00:00
parent eeb4b20390
commit acade33497
1 changed files with 3 additions and 7 deletions
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10
compiler/gen_wasm/src/backend.rs
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@ -678,17 +678,13 @@ impl<'a> WasmBackend<'a> {
} }
Expr::Array { elems, elem_layout } => { Expr::Array { elems, elem_layout } => {
if let StoredValue::StackMemory { if let StoredValue::StackMemory { location, .. } = storage {
location,
alignment_bytes,
..
} = storage
{
let size = elem_layout.stack_size(PTR_SIZE) * (elems.len() as u32); let size = elem_layout.stack_size(PTR_SIZE) * (elems.len() as u32);
// Allocate heap space and store its address in a local variable // Allocate heap space and store its address in a local variable
let heap_local_id = self.storage.create_anonymous_local(PTR_TYPE); let heap_local_id = self.storage.create_anonymous_local(PTR_TYPE);
self.allocate_with_refcount(Some(size), *alignment_bytes, 1); let heap_alignment = elem_layout.alignment_bytes(PTR_SIZE);
self.allocate_with_refcount(Some(size), heap_alignment, 1);
self.code_builder.set_local(heap_local_id); self.code_builder.set_local(heap_local_id);
let (stack_local_id, stack_offset) = let (stack_local_id, stack_offset) =