From d3f6bbabaabeada04a4729784c813163f5436ac1 Mon Sep 17 00:00:00 2001
From: greg <greg.shuflin@protonmail.com>
Date: Wed, 21 Dec 2016 01:42:37 -0800
Subject: [PATCH] Starting to add actual LLVM generating code

---
 Cargo.toml         |   2 -
 src/compilation.rs | 116 ++++++---------------------------------------
 2 files changed, 14 insertions(+), 104 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 3a49afa..c1ad0f2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,5 +8,3 @@ authors = ["greg <greg.shuflin@protonmail.com>"]
 simplerepl = { path = "../simplerepl" }
 llvm-sys = "*"
 
-[dependencies.iron_llvm]
-git = "https://github.com/jauhien/iron-llvm.git"
diff --git a/src/compilation.rs b/src/compilation.rs
index a612e04..276c51e 100644
--- a/src/compilation.rs
+++ b/src/compilation.rs
@@ -1,11 +1,8 @@
 extern crate llvm_sys;
-extern crate iron_llvm;
 
-use self::llvm_sys::prelude::LLVMValueRef;
+use self::llvm_sys::prelude::*;
+use self::llvm_sys::core;
 
-use self::iron_llvm::core;
-use self::iron_llvm::core::types::{RealTypeCtor, RealTypeRef};
-use self::iron_llvm::{LLVMRef, LLVMRefCtor};
 
 use parser::{ParseResult, AST, ASTNode, Prototype, Function, Expression};
 
@@ -14,112 +11,27 @@ pub fn compile_ast(ast: AST) {
 
 }
 
-/*
-pub struct Context {
-    context: core::Context,
-    builder: core::Builder,
-    named_values: HashMap<String, LLVMValueRef>,
-    ty: RealTypeRef,
+trait CodeGen {
+    fn codegen(&self, LLVMContextRef) ->  LLVMValueRef;
 }
 
-impl Context {
-    pub fn new() -> Context {
-        let context = core::Context::get_global();
-        let builder = core::Builder::new();
-        let named_values = HashMap::new();
-        let ty = RealTypeRef::get_double();
-        Context {
-            context: context,
-            builder: builder,
-            named_values: named_values,
-            ty: ty,
-        }
-    }
-}
 
-pub trait ModuleProvider {
-    fn dump(&self);
-    fn get_module(&mut self) -> &mut core::Module;
-    fn get_function(&mut self, name: &str) -> Option<(FunctionRef, bool)>;
-}
-
-pub struct SimpleModuleProvider {
-    module: core::Module,
-}
-
-impl SimpleModuleProvider {
-    pub fn new(name: &str) -> SimpleModuleProvider {
-        let module = core::Module::new(name);
-        SimpleModuleProvider {
-            module: module,
-        }
-    }
-}
-
-impl ModuleProvider for SimpleModuleProvider {
-    fn dump(&self) {
-        self.module.dump();
-    }
-
-    fn get_module(&mut self) -> &mut core::Module {
-        &mut self.module
-    }
-
-    fn get_function(&mut self, name: &str) -> Option<(FunctionRef, bool)> {
-        match self.module.get_function_by_name(name) {
-            Some(f) => Some((f, f.count_basic_block() > 0)),
-            None => None
-        }
-    }
-}
-
-pub type IRBuildingResult = Result<(LLVMValueRef, bool), String>;
-
-fn error(msg: &str) -> IRBuildingResult {
-    Err(msg.to_string())
-}
-
-pub trait IRBuilder {
-    fn codegen(&self, context: &mut Context, module_provider: &mut ModuleProvider) -> IRBuildingResult;
-}
-
-impl IRBuilder for ParseResult<AST> {
-    fn codegen(&self, context: &mut Context, module_provider: &mut ModuleProvider) -> IRBuildingResult {
+impl CodeGen for ASTNode {
+    fn codegen(&self, context: LLVMContextRef) -> LLVMValueRef {
+        use self::ASTNode::*;
         match self {
-            &Ok(ast) => ast.codegen(context, module_provider),
-            &Err(err) => Err(err.msg.clone())
+            &ExprNode(ref expr) => expr.codegen(context),
+            &FuncNode(ref func) => unimplemented!(),
         }
     }
 }
 
-impl IRBuilder for AST {
-    fn codegen(&self, context: &mut Context, module_provider: &mut ModuleProvider) -> IRBuildingResult {
-        let mut result = error("empty AST");
-        for node in self.iter() {
-            result = Ok(try!(node.codegen(context, module_provider)));
-        }
-        result
-    }
-}
-
-impl IRBuilder for ASTNode {
-    fn codegen(&self, context: &mut Context, module_provider: &mut ModuleProvider) -> IRBuildingResult {
+impl CodeGen for Expression {
+    fn codegen(&self, context: LLVMContextRef) -> LLVMValueRef {
+        use self::Expression::*;
         match self {
-            &ASTNode::ExprNode(ref expression) => expression.codegen(context, module_provider),
-            &ASTNode::FuncNode(ref function) => function.codegen(context, module_provider),
+            &Number(ref n) => unimplemented!(),
+            _ => unimplemented!(),
         }
     }
 }
-
-impl IRBuilder for Function {
-    fn codegen(&self, context: &mut Context, module_provider: &mut ModuleProvider) -> IRBuildingResult {
-        unimplemented!()
-    }
-}
-
-impl IRBuilder for Expression {
-    fn codegen(&self, context: &mut Context, module_provider: &mut ModuleProvider) -> IRBuildingResult {
-        unimplemented!()
-    }
-}
-*/