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Simplify CodeBuilder::call

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Brian Carroll 2021-11-12 12:48:44 +00:00
parent 3a751aa3e8
commit 4b3538dc58
1 changed files with 5 additions and 18 deletions
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23
compiler/gen_wasm/src/wasm_module/code_builder.rs
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@ -520,27 +520,14 @@ impl<'a> CodeBuilder<'a> {
n_args: usize, n_args: usize,
has_return_val: bool, has_return_val: bool,
) { ) {
let stack_depth = self.vm_stack.len(); self.inst(CALL, n_args, has_return_val);
if n_args > stack_depth {
panic!(
"Trying to call to call function {:?} with {:?} values but only {:?} on the VM stack\n{:?}",
function_index, n_args, stack_depth, self
);
}
self.vm_stack.truncate(stack_depth - n_args);
if has_return_val {
self.vm_stack.push(Symbol::WASM_ANONYMOUS_STACK_VALUE);
}
self.code.push(CALL as u8);
// println!("CALL \t{:?}", &self.vm_stack);
// Write the index of the function to be called.
// Also make a RelocationEntry so the linker can see that this byte offset relates to a function by name.
// Here we initialise the offset to an index of self.code. After completing the function, we'll add
// other factors to make it relative to the code section. (All insertions will be known then.)
let offset = self.code.len() as u32; let offset = self.code.len() as u32;
self.code.encode_padded_u32(function_index); self.code.encode_padded_u32(function_index);
// Make a RelocationEntry so the linker can see that this byte offset relates to a function by name.
// Here we initialise the offset to an index of self.code. After completing the function, we'll add
// other factors to make it relative to the code section. (All insertions will be known then.)
self.relocations.push(RelocationEntry::Index { self.relocations.push(RelocationEntry::Index {
type_id: IndexRelocType::FunctionIndexLeb, type_id: IndexRelocType::FunctionIndexLeb,
offset, offset,