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Eliminate a heap allocation.

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This commit is contained in:
Dan Gohman
2017-08-29 05:44:40 -07:00
parent 4afa5df3b6
commit c380df1d04
1 changed files with 2 additions and 6 deletions
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8
lib/wasm/src/code_translator.rs
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@@ -167,10 +167,6 @@ pub fn translate_function_body(parser: &mut Parser,
// First we build the Function object with its name and signature // First we build the Function object with its name and signature
let mut func = Function::new(); let mut func = Function::new();
let args_num: usize = sig.argument_types.len(); let args_num: usize = sig.argument_types.len();
let args_types: Vec<Type> = sig.argument_types
.iter()
.map(|arg| arg.value_type)
.collect();
func.signature = sig.clone(); func.signature = sig.clone();
match exports { match exports {
&None => (), &None => (),
@@ -190,11 +186,11 @@ pub fn translate_function_body(parser: &mut Parser,
let first_ebb = builder.create_ebb(); let first_ebb = builder.create_ebb();
builder.switch_to_block(first_ebb, &[]); builder.switch_to_block(first_ebb, &[]);
builder.seal_block(first_ebb); builder.seal_block(first_ebb);
for i in 0..args_num { for (i, arg_type) in sig.argument_types.iter().enumerate() {
// First we declare the function arguments' as non-SSA vars because they will be // First we declare the function arguments' as non-SSA vars because they will be
// accessed by get_local // accessed by get_local
let arg_value = builder.arg_value(i as usize); let arg_value = builder.arg_value(i as usize);
builder.declare_var(Local(i as u32), args_types[i]); builder.declare_var(Local(i as u32), arg_type.value_type);
builder.def_var(Local(i as u32), arg_value); builder.def_var(Local(i as u32), arg_value);
} }
// We also declare and initialize to 0 the local variables // We also declare and initialize to 0 the local variables