feat: compact value stack (#21)

Not fully done, but ready for the `next` branch now. This changes how
values are represented internally, making this pr particularly large, as
this touches most parts of the codebase. The parser should now also be
ready for multithreaded compilation to speed this up a bit.

---------

Signed-off-by: Henry Gressmann <mail@henrygressmann.de>

1 files changed, 6 insertions, 5 deletions

diff --git a/crates/parser/src/module.rs b/crates/parser/src/module.rs
index 294782c..3ee619f 100644
--- a/crates/parser/src/module.rs
+++ b/crates/parser/src/module.rs
@@ -3,12 +3,12 @@ use crate::{conversion, ParseError, Result};
 use alloc::string::ToString;
 use alloc::{boxed::Box, format, vec::Vec};
 use tinywasm_types::{
-    Data, Element, Export, FuncType, Global, Import, Instruction, MemoryType, TableType, TinyWasmModule, ValType,
+    Data, Element, Export, FuncType, Global, Import, Instruction, LocalCounts, MemoryType, TableType, TinyWasmModule,
     WasmFunction,
 };
 use wasmparser::{FuncValidatorAllocations, Payload, Validator};
 
-pub(crate) type Code = (Box<[Instruction]>, Box<[ValType]>);
+pub(crate) type Code = (Box<[Instruction]>, LocalCounts);
 
 #[derive(Default)]
 pub(crate) struct ModuleReader {
@@ -135,9 +135,10 @@ impl ModuleReader {
             CodeSectionEntry(function) => {
                 debug!("Found code section entry");
                 let v = validator.code_section_entry(&function)?;
-                let mut func_validator = v.into_validator(self.func_validator_allocations.take().unwrap_or_default());
-                self.code.push(conversion::convert_module_code(function, &mut func_validator)?);
-                self.func_validator_allocations = Some(func_validator.into_allocations());
+                let func_validator = v.into_validator(self.func_validator_allocations.take().unwrap_or_default());
+                let (code, allocations) = conversion::convert_module_code(function, func_validator)?;
+                self.code.push(code);
+                self.func_validator_allocations = Some(allocations);
             }
             ImportSection(reader) => {
                 if !self.imports.is_empty() {