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Delete current_stack, VmSymbolState, stack_is_empty, current_stack

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Brian Carroll 2023-11-05 22:23:43 +00:00
parent 664de9b285
commit 86a6a3ace5
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2 changed files with 0 additions and 45 deletions
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38
crates/compiler/gen_wasm/src/code_builder.rs
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@ -37,21 +37,6 @@ impl std::fmt::Debug for VmBlock<'_> {
}
}
#[derive(Debug, Clone, PartialEq, Eq, Copy)]
pub enum VmSymbolState {
/// Value doesn't exist yet
NotYetPushed,
/// Value has been pushed onto the VM stack but not yet popped
/// Remember where it was pushed, in case we need to insert another instruction there later
Pushed { pushed_at: usize },
/// Value has been pushed and popped, so it's not on the VM stack any more.
/// If we want to use it again later, we will have to create a local for it,
/// by going back to insert a local.tee instruction at pushed_at
Popped { pushed_at: usize },
}
// An instruction (local.set or local.tee) to be inserted into the function code
#[derive(Debug)]
struct Insertion {
@ -159,34 +144,11 @@ impl<'a> CodeBuilder<'a> {
***********************************************************/
pub fn stack_is_empty(&self) -> bool {
let block = self.vm_block_stack.last().unwrap();
block.value_stack.is_empty()
}
fn current_stack(&self) -> &Vec<'a, Symbol> {
let block = self.vm_block_stack.last().unwrap();
&block.value_stack
}
fn current_stack_mut(&mut self) -> &mut Vec<'a, Symbol> {
let block = self.vm_block_stack.last_mut().unwrap();
&mut block.value_stack
}
/// Set the Symbol that is at the top of the VM stack right now
/// We will use this later when we need to load the Symbol
pub fn set_top_symbol(&mut self, sym: Symbol) -> VmSymbolState {
let current_stack = &mut self.vm_block_stack.last_mut().unwrap().value_stack;
let pushed_at = self.code.len();
let top_symbol: &mut Symbol = current_stack
.last_mut()
.unwrap_or_else(|| internal_error!("Empty stack when trying to set Symbol {:?}", sym));
*top_symbol = sym;
VmSymbolState::Pushed { pushed_at }
}
/**********************************************************
FUNCTION HEADER