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Wasm control stack entries only need the number of return types.

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This eliminates heap-allocated vectors which stored the actual types.
This commit is contained in:
Dan Gohman
2017-09-25 12:48:31 -07:00
parent 55e48ce7aa
commit 36585ddc4f
4 changed files with 44 additions and 46 deletions
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12
lib/wasm/src/translation_utils.rs
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@@ -119,13 +119,13 @@ pub fn f64_translation(x: wasmparser::Ieee64) -> cretonne::ir::immediates::Ieee6
}
/// Translate a `wasmparser` type into its `Cretonne` equivalent, when possible
pub fn translate_type(ty: wasmparser::Type) -> Vec<cretonne::ir::Type> {
pub fn num_return_values(ty: wasmparser::Type) -> usize {
match ty {
wasmparser::Type::EmptyBlockType => Vec::new(),
wasmparser::Type::I32 => vec![cretonne::ir::types::I32],
wasmparser::Type::F32 => vec![cretonne::ir::types::F32],
wasmparser::Type::I64 => vec![cretonne::ir::types::I64],
wasmparser::Type::F64 => vec![cretonne::ir::types::F64],
wasmparser::Type::EmptyBlockType => 0,
wasmparser::Type::I32 |
wasmparser::Type::F32 |
wasmparser::Type::I64 |
wasmparser::Type::F64 => 1,
_ => panic!("unsupported return value type"),
}
}