From cd2a1a81d104d72831c756ada05dd8463ead8545 Mon Sep 17 00:00:00 2001
From: Krzosa Karol <krzosa.karol@gmail.com>
Date: Fri, 24 Jun 2022 21:56:51 +0200
Subject: [PATCH] Reworking ir stuff

---
 bytecode_codegen.cpp | 194 -------------------------------------------
 1 file changed, 194 deletions(-)
 delete mode 100644 bytecode_codegen.cpp

diff --git a/bytecode_codegen.cpp b/bytecode_codegen.cpp
deleted file mode 100644
index c490c2b..0000000
--- a/bytecode_codegen.cpp
+++ /dev/null
@@ -1,194 +0,0 @@
-typedef S32 Register_Index;
-union Register{
-  F64   f64;
-  S64   s64;
-
-  S64  *pointer_s64;
-  F64  *pointer_f64;
-  U8   *pointer;
-  U64  *pointer64;
-
-  U64  *pointer_u64;
-  U32  *pointer_u32;
-  U16  *pointer_u16;
-  U8   *pointer_u8;
-
-  U64   u64;
-  U32   u32;
-  U16   u16;
-  U8    u8;
-
-};
-static_assert(sizeof(Register) == 8, "not 8 bytes");
-
-enum Ir_Storage_Kind{
-  STORAGE_NULL,
-  STORAGE_GLOBAL,
-  STORAGE_CONSTANT,
-  STORAGE_REGISTER,
-  STORAGE_STACK,
-};
-
-struct Ir_Storage{
-  Ast_Type *type;
-  Ir_Storage *next;
-  Ir_Storage_Kind kind;
-  union{ S64 register_index; S64 offset; Register constant; };
-};
-
-enum Ir_Instruction_Kind{
-  IR_NOOP,
-
-  IR_STORE,
-  IR_LOAD,
-
-  IR_ADD,
-  IR_SUB,
-  IR_MUL,
-  IR_DIV,
-};
-
-struct Ir_Instruction{
-  Ir_Instruction_Kind kind;
-  Ir_Storage *a;
-  Ir_Storage *b;
-  Ir_Storage *c;
-};
-
-struct Ir_Block{
-  Simple_Bucket_Array<Ir_Instruction, 64> instructions;
-};
-
-struct Ir_Call;
-struct Ir_Var{
-  Ast_Decl *decl;
-  Ir_Storage storage;
-  Ir_Call *call;
-  Simple_Bucket_Array<Ir_Block, 16> blocks;
-};
-
-struct Ir_Call{
-  Ast_Decl *decl;
-
-  Array<Register_Index> used_registers;
-  Array<Register_Index> free_registers;
-  Register_Index register_ids;
-
-  Ir_Storage return_value;
-  Simple_Bucket_Array<Ir_Var,   4> args;
-  Simple_Bucket_Array<Ir_Block, 8> blocks;
-};
-
-struct Ir_Builder{
-  #define IR_NEW(T) exp_alloc_type(ir->arena, T, AF_ZeroMemory)
-  Arena _arena;
-  Arena *arena;
-
-  Simple_Bucket_Array<Ir_Var,  32> global_variables;
-  Simple_Bucket_Array<Ir_Call, 64> calls;
-};
-
-function Register_Index
-allocate_register(Ir_Call *call){
-  Register_Index result = -1;
-  if(call->free_registers.len > 0){
-    result = call->free_registers.pop();
-  }
-  else{
-    result = call->register_ids++;
-  }
-
-  assert(result != -1);
-  call->used_registers.add(result);
-  return result;
-}
-
-function void
-release_register(Ir_Call *call, Register_Index index){
-  if(index == -1) return;
-
-  B32 found = false;
-  For(call->used_registers){
-    if(index == it){
-      call->used_registers.unordered_remove(&it);
-      found = true;
-      break;
-    }
-  }
-
-  assert_msg(found, "Internal compiler error: releasing register that is not marked as used");
-  call->free_registers.add(index);
-}
-
-function void
-build_bytecode(){
-  Ir_Builder ir_builder = {};
-  arena_init(&ir_builder._arena, "Ir builder arena"_s);
-  ir_builder.arena = &ir_builder._arena;
-
-  Ir_Builder *ir = &ir_builder;
-  For_Named(pctx->ordered_decls, ast){
-    switch(ast->kind){
-      CASE(LAMBDA, Decl){
-        Ir_Call *call = ir->calls.allocate(ir->arena);
-        call->decl = node;
-        // @todo multiple return values
-        call->return_value.type = node->lambda->ret[0]->resolved_type;
-        call->free_registers = array_make<Register_Index>(ir->arena, 32);
-        call->used_registers = array_make<Register_Index>(ir->arena, 32);
-
-        For_It(node->lambda->args){
-          Ir_Var *arg = call->args.allocate(ir->arena);
-          arg->decl = *it.it;
-          arg->call = call;
-          arg->storage.kind = STORAGE_REGISTER;
-          arg->storage.register_index = allocate_register(call);
-        }
-
-        // @todo: Allocate all variables in function
-        //
-        //
-
-        For(node->lambda->scope->stmts){
-          CASE(VAR, Decl){
-
-
-
-            BREAK();
-          }
-        }
-
-        BREAK();
-      }
-
-      CASE(VAR, Decl){
-        if(is_flag_set(node->flags, AST_FOREIGN)){
-          break; // @todo
-        }
-        if(!is_flag_set(node->flags, AST_VAR_IS_CONST)){
-          compiler_error(node->pos, "Global variable has value assigned that is not constant and requires computation");
-        }
-
-        Ir_Var *v = ir->global_variables.allocate(ir->arena);
-        v->decl    = node;
-        v->storage.kind = STORAGE_GLOBAL;
-        v->storage.type = node->type;
-        if(node->type->size <= 8){
-          switch(node->type->kind){
-            CASE_UINT: v->storage.constant.u64 = bigint_as_unsigned(&node->big_int_val); break;
-            CASE_SINT: v->storage.constant.s64 = bigint_as_signed(&node->big_int_val); break;
-            CASE_FLOAT: v->storage.constant.f64 = node->f64_val; break;
-            invalid_default_case;
-          }
-        }
-        else {
-          // Doesn't fit in register
-          invalid_codepath;
-        }
-
-        BREAK();
-      }
-      default: {};
-    }
-  }
-}
\ No newline at end of file