Roll back optimization changes.

code/compiler/13/ast.cpp

@@ -212,6 +212,10 @@ type_ptr ast_case::typecheck(type_mgr& mgr, type_env_ptr& env) {
 
     input_type = mgr.resolve(case_type, var);
     type_app* app_type;
+    if(!(app_type = dynamic_cast<type_app*>(input_type.get())) ||
+            !dynamic_cast<type_data*>(app_type->constructor.get())) {
+        throw type_error("attempting case analysis of non-data type");
+    }
 
     return branch_type;
 }
@@ -223,219 +227,60 @@ void ast_case::translate(global_scope& scope) {
     }
 }
 
-template <typename T>
-struct case_mappings {
-    using tag_type = typename T::tag_type;
-    std::map<tag_type, std::vector<instruction_ptr>> defined_cases;
-    std::optional<std::vector<instruction_ptr>> default_case;
-
-    std::vector<instruction_ptr>& make_case_for(tag_type tag) {
-        if(default_case)
-            throw compiler_error("attempted pattern match after catch-all");
-        return defined_cases[tag];
-    }
-
-    std::vector<instruction_ptr>& make_default_case() {
-        if(default_case)
-            throw compiler_error("attempted repeated use of catch-all");
-        default_case.emplace(std::vector<instruction_ptr>());
-        return *default_case;
-    }
-
-    std::vector<instruction_ptr>& get_specific_case_for(tag_type tag) {
-        auto existing_case = defined_cases.find(tag);
-        assert(existing_case != defined_cases.end());
-        return existing_case->second;
-    }
-
-    std::vector<instruction_ptr>& get_default_case() {
-        assert(default_case);
-        return *default_case;
-    }
-    
-    std::vector<instruction_ptr>& get_case_for(tag_type tag) {
-        if(case_defined_for(tag)) return get_specific_case_for(tag);
-        return get_default_case();
-    }
-
-    bool case_defined_for(tag_type tag) {
-        return defined_cases.find(tag) != defined_cases.end();
-    }
-
-    bool default_case_defined() { return default_case.has_value(); }
-
-    size_t defined_cases_count() { return defined_cases.size(); }
-};
-
-
-struct case_strategy_bool {
-    using tag_type = bool;
-    using repr_type = bool;
-
-    case_strategy_bool(const type* type) {}
-    
-    tag_type tag_from_repr(repr_type b) { return b; }
-
-    repr_type repr_from_pattern(const pattern_ptr& pt) {
-        pattern_constr* cpat;
-        if(!(cpat = dynamic_cast<pattern_constr*>(pt.get())) ||
-                (cpat->constr != "True" && cpat->constr != "False") ||
-                cpat->params.size() != 0)
-            throw compiler_error(
-                    "pattern cannot be converted to a boolean",
-                    pt->loc);
-        return cpat->constr == "True";
-    }
-
-    void compile_branch(
-            const branch_ptr& branch,
-            const env_ptr& env,
-            repr_type repr,
-            std::vector<instruction_ptr>& into) {
-        branch->expr->compile(env_ptr(new env_offset(1, env)), into);
-        into.push_back(instruction_ptr(new instruction_slide(1)));
-    }
-
-    size_t case_count() {
-        return 2;
-    }
-
-    void into_instructions(
-            case_mappings<case_strategy_bool>& ms,
-            std::vector<instruction_ptr>& into) {
-        if(ms.defined_cases_count() == 0) {
-            for(auto& instruction : ms.get_default_case())
-                into.push_back(std::move(instruction));
-            return;
-        }
-
-        instruction_ijump* ijump = new instruction_ijump();
-        instruction_ptr inst(ijump);
-        ijump->branches.push_back(std::move(ms.get_case_for(false)));
-        ijump->tag_mappings[0] = 0;
-        ijump->branches.push_back(std::move(ms.get_case_for(true)));
-        ijump->tag_mappings[1] = 1;
-        into.push_back(std::move(inst));
-    }
-};
-
-struct case_strategy_data {
-    using tag_type = int;
-    using repr_type = std::pair<const type_data::constructor*, const std::vector<std::string>*>;
-
-    const type_data* arg_type;
-
-    case_strategy_data(const type* t) {
-        arg_type = dynamic_cast<const type_data*>(t);
-        assert(arg_type);
-    }
-
-    tag_type tag_from_repr(const repr_type& repr) { return repr.first->tag; }
-
-    repr_type repr_from_pattern(const pattern_ptr& pt) {
-        pattern_constr* cpat;
-        if(!(cpat = dynamic_cast<pattern_constr*>(pt.get())))
-            throw compiler_error(
-                    "pattern cannot be interpreted as constructor.",
-                    pt->loc);
-        return std::make_pair(
-                &arg_type->constructors.find(cpat->constr)->second,
-                &cpat->params);
-    }
-
-    void compile_branch(
-            const branch_ptr& branch,
-            const env_ptr& env,
-            const repr_type& repr,
-            std::vector<instruction_ptr>& into) {
-        env_ptr new_env = env;
-        for(auto it = repr.second->rbegin(); it != repr.second->rend(); it++) {
-            new_env = env_ptr(new env_var(*it, new_env));
-        }
-
-        into.push_back(instruction_ptr(new instruction_split(repr.second->size())));
-        branch->expr->compile(new_env, into);
-        into.push_back(instruction_ptr(new instruction_slide(repr.second->size())));
-    }
-
-    size_t case_count() {
-        return arg_type->constructors.size();
-    }
-
-    void into_instructions(
-            case_mappings<case_strategy_data>& ms,
-            std::vector<instruction_ptr>& into) {
-        instruction_jump* jump_instruction = new instruction_jump();
-        instruction_ptr inst(jump_instruction);
-
-        for(auto& constr : arg_type->constructors) {
-            if(!ms.case_defined_for(constr.second.tag)) continue;
-            jump_instruction->branches.push_back(
-                    std::move(ms.get_specific_case_for(constr.second.tag)));
-            jump_instruction->tag_mappings[constr.second.tag] =
-                jump_instruction->branches.size() - 1;
-        }
-
-        if(ms.default_case_defined()) {
-            jump_instruction->branches.push_back(
-                    std::move(ms.get_default_case()));
-            for(auto& constr : arg_type->constructors) {
-                if(ms.case_defined_for(constr.second.tag)) continue;
-                jump_instruction->tag_mappings[constr.second.tag] =
-                    jump_instruction->branches.size();
-            }
-        }
-
-        into.push_back(std::move(inst));
-    }
-};
-
-template <typename T>
-void compile_case(const ast_case& node, const env_ptr& env, const type* type, std::vector<instruction_ptr>& into) {
-    T strategy(type);
-    case_mappings<T> cases;
-    for(auto& branch : node.branches) {
-        pattern_var* vpat;
-        if((vpat = dynamic_cast<pattern_var*>(branch->pat.get()))) {
-            if(cases.defined_cases_count() == strategy.case_count())
-                throw compiler_error("redundant catch-all pattern", branch->pat->loc);
-            auto& branch_into = cases.make_default_case();
-            env_ptr new_env(new env_var(vpat->var, env));
-            branch->expr->compile(new_env, branch_into);
-            branch_into.push_back(instruction_ptr(new instruction_slide(1)));
-        } else {
-            auto repr = strategy.repr_from_pattern(branch->pat);
-            auto& branch_into = cases.make_case_for(strategy.tag_from_repr(repr));
-            strategy.compile_branch(branch, env, repr, branch_into);
-        }
-    }
-
-    if(!(cases.defined_cases_count() == strategy.case_count() ||
-                cases.default_case_defined()))
-        throw compiler_error("incomplete patterns", node.loc);
-
-    strategy.into_instructions(cases, into);
-}
-
 void ast_case::compile(const env_ptr& env, std::vector<instruction_ptr>& into) const {
     type_app* app_type = dynamic_cast<type_app*>(input_type.get());
-    type_data* data;
+    type_data* type = dynamic_cast<type_data*>(app_type->constructor.get());
-    type_base *base;
 
     of->compile(env, into);
     into.push_back(instruction_ptr(new instruction_eval()));
 
-    if(app_type && (data = dynamic_cast<type_data*>(app_type->constructor.get()))) {
+    instruction_jump* jump_instruction = new instruction_jump();
-        compile_case<case_strategy_data>(*this, env, data, into);
+    into.push_back(instruction_ptr(jump_instruction));
-        return;
+    for(auto& branch : branches) {
-    } else if (app_type && (base = dynamic_cast<type_base *>(app_type->constructor.get()))) {
+        std::vector<instruction_ptr> branch_instructions;
-      if (base->name == "Bool") {
+        pattern_var* vpat;
-        compile_case<case_strategy_bool>(*this, env, data, into);
+        pattern_constr* cpat;
-        return;
+
+        if((vpat = dynamic_cast<pattern_var*>(branch->pat.get()))) {
+            branch->expr->compile(env_ptr(new env_offset(1, env)), branch_instructions);
+
+            for(auto& constr_pair : type->constructors) {
+                if(jump_instruction->tag_mappings.find(constr_pair.second.tag) !=
+                        jump_instruction->tag_mappings.end())
+                    break;
+
+                jump_instruction->tag_mappings[constr_pair.second.tag] =
+                    jump_instruction->branches.size();
+            }
+            jump_instruction->branches.push_back(std::move(branch_instructions));
+        } else if((cpat = dynamic_cast<pattern_constr*>(branch->pat.get()))) {
+            env_ptr new_env = env;
+            for(auto it = cpat->params.rbegin(); it != cpat->params.rend(); it++) {
+                new_env = env_ptr(new env_var(*it, new_env));
+            }
+
+            branch_instructions.push_back(instruction_ptr(new instruction_split(
+                            cpat->params.size())));
+            branch->expr->compile(new_env, branch_instructions);
+            branch_instructions.push_back(instruction_ptr(new instruction_slide(
+                            cpat->params.size())));
+
+            int new_tag = type->constructors[cpat->constr].tag;
+            if(jump_instruction->tag_mappings.find(new_tag) !=
+                    jump_instruction->tag_mappings.end())
+                throw type_error("technically not a type error: duplicate pattern");
+
+            jump_instruction->tag_mappings[new_tag] =
+                jump_instruction->branches.size();
+            jump_instruction->branches.push_back(std::move(branch_instructions));
         }
     }
 
-    throw type_error("attempting unsupported case analysis", of->loc);
+    for(auto& constr_pair : type->constructors) {
+        if(jump_instruction->tag_mappings.find(constr_pair.second.tag) ==
+                jump_instruction->tag_mappings.end())
+            throw type_error("non-total pattern");
+    }
 }
 
 void ast_let::print(int indent, std::ostream& to) const {

code/compiler/13/binop.cpp

@@ -6,9 +6,6 @@ std::string op_name(binop op) {
         case MINUS: return "-";
         case TIMES: return "*";
         case DIVIDE: return "/";
-        case MODULO: return "%";
-        case EQUALS: return "==";
-        case LESS_EQUALS: return "<=";
     }
     return "??";
 }
@@ -19,9 +16,6 @@ std::string op_action(binop op) {
         case MINUS: return "minus";
         case TIMES: return "times";
         case DIVIDE: return "divide";
-        case MODULO: return "modulo";
-        case EQUALS: return "equals";
-        case LESS_EQUALS: return "less_equals";
     }
     return "??";
 }

code/compiler/13/binop.hpp

@@ -6,15 +6,11 @@ enum binop {
     PLUS,
     MINUS,
     TIMES,
-    DIVIDE,
+    DIVIDE
-    MODULO,
-    EQUALS,
-    LESS_EQUALS,
 };
 
 constexpr binop all_binops[] = {
-    PLUS, MINUS, TIMES, DIVIDE, MODULO,
+    PLUS, MINUS, TIMES, DIVIDE
-    EQUALS, LESS_EQUALS
 };
 
 std::string op_name(binop op);

code/compiler/13/compiler.cpp

@@ -17,7 +17,6 @@
 
 void compiler::add_default_types() {
     global_env->bind_type("Int", type_ptr(new type_base("Int")));
-    global_env->bind_type("Bool", type_ptr(new type_base("Bool")));
 }
 
 void compiler::add_binop_type(binop op, type_ptr type) {
@@ -31,24 +30,11 @@ void compiler::add_default_function_types() {
     assert(int_type != nullptr);
     type_ptr int_type_app = type_ptr(new type_app(int_type));
 
-    type_ptr bool_type = global_env->lookup_type("Bool");
-    assert(bool_type != nullptr);
-    type_ptr bool_type_app = type_ptr(new type_app(bool_type));
-
     type_ptr closed_int_op_type(
             new type_arr(int_type_app, type_ptr(new type_arr(int_type_app, int_type_app))));
-    type_ptr compare_int_op_type(
-            new type_arr(int_type_app, type_ptr(new type_arr(int_type_app, bool_type_app))));
 
-    constexpr binop closed_ops[] = { PLUS, MINUS, TIMES, DIVIDE, MODULO };
+    constexpr binop closed_ops[] = { PLUS, MINUS, TIMES, DIVIDE };
-    constexpr binop compare_ops[] = { EQUALS, LESS_EQUALS };
     for(auto& op : closed_ops) add_binop_type(op, closed_int_op_type);
-    for(auto& op : compare_ops) add_binop_type(op, compare_int_op_type);
-
-    for(auto name : { "True", "False" }) {
-        global_env->bind(name, bool_type_app, visibility::global);
-        global_env->set_mangled_name(name, mng.new_mangled_name(name));
-    }
 }
 
 void compiler::parse() {
@@ -94,25 +80,10 @@ void compiler::create_llvm_binop(binop op) {
     ctx.get_builder().CreateRetVoid();
 }
 
-void compiler::create_llvm_bool(bool b) {
-    auto new_function = ctx.create_custom_function(
-            global_env->get_mangled_name(b ? "True" : "False"), 0);
-    std::vector<instruction_ptr> instructions;
-    instructions.push_back(instruction_ptr(new instruction_pushint(b)));
-    instructions.push_back(instruction_ptr(new instruction_update(0)));
-    ctx.get_builder().SetInsertPoint(&new_function->getEntryBlock());
-    for(auto& instruction : instructions) {
-        instruction->gen_llvm(ctx, new_function);
-    }
-    ctx.get_builder().CreateRetVoid();
-}
-
 void compiler::generate_llvm() {
     for(auto op : all_binops) {
         create_llvm_binop(op);
     }
-    create_llvm_bool(true);
-    create_llvm_bool(false);
 
     global_scp.generate_llvm(ctx);
 }

code/compiler/13/compiler.hpp

@@ -27,7 +27,6 @@ class compiler {
         void translate();
         void compile();
         void create_llvm_binop(binop op);
-        void create_llvm_bool(bool b);
         void generate_llvm();
         void output_llvm(const std::string& into);
     public:

code/compiler/13/instruction.cpp

@@ -100,7 +100,7 @@ void instruction_jump::print(int indent, std::ostream& to) const {
 
 void instruction_jump::gen_llvm(llvm_context& ctx, Function* f) const {
     auto top_node = ctx.create_peek(f, ctx.create_size(0));
-    auto tag = get_case_value(ctx, top_node);
+    auto tag = ctx.unwrap_data_tag(top_node);
     auto safety_block = ctx.create_basic_block("safety", f);
     auto switch_op = ctx.get_builder().CreateSwitch(tag, safety_block, tag_mappings.size());
     std::vector<BasicBlock*> blocks;
@@ -122,14 +122,6 @@ void instruction_jump::gen_llvm(llvm_context& ctx, Function* f) const {
     ctx.get_builder().SetInsertPoint(safety_block);
 }
 
-Value* instruction_jump::get_case_value(llvm_context& ctx, Value* v) const {
-    return ctx.unwrap_data_tag(v);
-}
-
-Value* instruction_ijump::get_case_value(llvm_context& ctx, Value* v) const {
-    return ctx.unwrap_num(v);
-}
-
 void instruction_slide::print(int indent, std::ostream& to) const {
     print_indent(indent, to);
     to << "Slide(" << offset << ")" << std::endl;
@@ -153,9 +145,6 @@ void instruction_binop::gen_llvm(llvm_context& ctx, Function* f) const {
         case MINUS: result = ctx.get_builder().CreateSub(left_int, right_int); break;
         case TIMES: result = ctx.get_builder().CreateMul(left_int, right_int); break;
         case DIVIDE: result = ctx.get_builder().CreateSDiv(left_int, right_int); break;
-        case MODULO: result = ctx.get_builder().CreateSRem(left_int, right_int); break;
-        case EQUALS: result = ctx.get_builder().CreateICmpEQ(left_int, right_int); break;
-        case LESS_EQUALS: result = ctx.get_builder().CreateICmpSLE(left_int, right_int); break;
     }
     ctx.create_push(f, ctx.create_num(f, result));
 }

code/compiler/13/instruction.hpp

@@ -99,12 +99,6 @@ struct instruction_jump : public instruction {
 
     void print(int indent, std::ostream& to) const;
     void gen_llvm(llvm_context& ctx, llvm::Function* f) const;
-
-    virtual llvm::Value* get_case_value(llvm_context& ctx, llvm::Value*) const;
-};
-
-struct instruction_ijump : public instruction_jump {
-    llvm::Value* get_case_value(llvm_context& ctx, llvm::Value*) const;
 };
 
 struct instruction_slide : public instruction {

code/compiler/13/llvm_context.cpp

@@ -237,7 +237,12 @@ Value* llvm_context::unwrap_gmachine_stack_ptr(Value* g) {
 }
 
 Value* llvm_context::unwrap_num(Value* v) {
-    return builder.CreatePtrToInt(v, IntegerType::getInt32Ty(ctx));
+    auto num_ptr_type = PointerType::getUnqual(struct_types.at("node_num"));
+    auto cast = builder.CreatePointerCast(v, num_ptr_type);
+    auto offset_0 = create_i32(0);
+    auto offset_1 = create_i32(1);
+    auto int_ptr = builder.CreateGEP(cast, { offset_0, offset_1 });
+    return builder.CreateLoad(int_ptr);
 }
 Value* llvm_context::create_num(Function* f, Value* v) {
     auto alloc_num_f = functions.at("alloc_num");

code/compiler/13/parser.y

@@ -18,14 +18,10 @@ using yyscan_t = void*;
 }
 
 %token BACKSLASH
-%token BACKTICK
 %token PLUS
 %token TIMES
 %token MINUS
 %token DIVIDE
-%token MODULO
-%token EQUALS
-%token LESS_EQUALS
 %token <int> INT
 %token DEFN
 %token DATA
@@ -53,10 +49,9 @@ using yyscan_t = void*;
 %type <std::vector<branch_ptr>> branches
 %type <std::vector<constructor_ptr>> constructors
 %type <std::vector<parsed_type_ptr>> typeList
-%type <binop> anyBinop
 %type <definition_group> definitions
 %type <parsed_type_ptr> type nonArrowType typeListElement
-%type <ast_ptr> aInfix aEq aAdd aMul case let lambda app appBase
+%type <ast_ptr> aAdd aMul case let lambda app appBase
 %type <definition_data_ptr> data 
 %type <definition_defn_ptr> defn
 %type <branch_ptr> branch
@@ -78,7 +73,7 @@ definitions
     ;
 
 defn
-    : DEFN LID lowercaseParams EQUAL OCURLY aInfix CCURLY
+    : DEFN LID lowercaseParams EQUAL OCURLY aAdd CCURLY
         { $$ = definition_defn_ptr(
             new definition_defn(std::move($2), std::move($3), std::move($6), @$)); }
     ;
@@ -88,22 +83,6 @@ lowercaseParams
     | lowercaseParams LID { $$ = std::move($1); $$.push_back(std::move($2)); }
     ;
 
-aInfix
-    : aInfix BACKTICK LID BACKTICK aEq
-        { $$ = ast_ptr(new ast_app(
-            ast_ptr(new ast_app(ast_ptr(new ast_lid(std::move($3))), std::move($1))), std::move($5))); }
-    | aInfix BACKTICK UID BACKTICK aEq
-        { $$ = ast_ptr(new ast_app(
-            ast_ptr(new ast_app(ast_ptr(new ast_uid(std::move($3))), std::move($1))), std::move($5))); }
-    | aEq { $$ = std::move($1); }
-    ;
-
-aEq
-    : aAdd EQUALS aAdd { $$ = ast_ptr(new ast_binop(EQUALS, std::move($1), std::move($3), @$)); }
-    | aAdd LESS_EQUALS aAdd { $$ = ast_ptr(new ast_binop(LESS_EQUALS, std::move($1), std::move($3), @$)); }
-    | aAdd { $$ = std::move($1); }
-    ;
-
 aAdd
     : aAdd PLUS aMul { $$ = ast_ptr(new ast_binop(PLUS, std::move($1), std::move($3), @$)); }
     | aAdd MINUS aMul { $$ = ast_ptr(new ast_binop(MINUS, std::move($1), std::move($3), @$)); }
@@ -113,7 +92,6 @@ aAdd
 aMul
     : aMul TIMES app { $$ = ast_ptr(new ast_binop(TIMES, std::move($1), std::move($3), @$)); }
     | aMul DIVIDE app { $$ = ast_ptr(new ast_binop(DIVIDE, std::move($1), std::move($3), @$)); }
-    | aMul MODULO app { $$ = ast_ptr(new ast_binop(MODULO, std::move($1), std::move($3), @$)); }
     | app { $$ = std::move($1); }
     ;
 
@@ -126,35 +104,24 @@ appBase
     : INT { $$ = ast_ptr(new ast_int($1, @$)); }
     | LID { $$ = ast_ptr(new ast_lid(std::move($1), @$)); }
     | UID { $$ = ast_ptr(new ast_uid(std::move($1), @$)); }
-    | OPAREN aInfix CPAREN { $$ = std::move($2); }
+    | OPAREN aAdd CPAREN { $$ = std::move($2); }
-    | OPAREN anyBinop CPAREN { $$ = ast_ptr(new ast_lid(op_name($2))); }
     | case { $$ = std::move($1); }
     | let { $$ = std::move($1); }
     | lambda { $$ = std::move($1); }
     ;
 
-anyBinop
-    : PLUS { $$ = PLUS; }
-    | MINUS { $$ = MINUS; }
-    | TIMES { $$ = TIMES; }
-    | DIVIDE { $$ = DIVIDE; }
-    | MODULO { $$ = MODULO; }
-    | EQUALS { $$ = EQUALS; }
-    | LESS_EQUALS { $$ = LESS_EQUALS; }
-    ;
-
 let
-    : LET OCURLY definitions CCURLY IN OCURLY aInfix CCURLY
+    : LET OCURLY definitions CCURLY IN OCURLY aAdd CCURLY
         { $$ = ast_ptr(new ast_let(std::move($3), std::move($7), @$)); }
     ;
 
 lambda
-    : BACKSLASH lowercaseParams ARROW OCURLY aInfix CCURLY
+    : BACKSLASH lowercaseParams ARROW OCURLY aAdd CCURLY
         { $$ = ast_ptr(new ast_lambda(std::move($2), std::move($5), @$)); }
     ;
 
 case
-    : CASE aInfix OF OCURLY branches CCURLY 
+    : CASE aAdd OF OCURLY branches CCURLY 
         { $$ = ast_ptr(new ast_case(std::move($2), std::move($5), @$)); }
     ;
 
@@ -164,7 +131,7 @@ branches
     ;
 
 branch
-    : pattern ARROW OCURLY aInfix CCURLY
+    : pattern ARROW OCURLY aAdd CCURLY
         { $$ = branch_ptr(new branch(std::move($1), std::move($4))); }
     ;
 

code/compiler/13/runtime.c

@@ -1,13 +1,9 @@
-#include <bits/stdint-intn.h>
 #include <stdint.h>
 #include <assert.h>
 #include <memory.h>
 #include <stdio.h>
 #include "runtime.h"
 
-#define TOGGLE_MARK(n) ((uint64_t) n ^ ((uint64_t) 1 << 63))
-#define IS_MARKED(n) ((((uint64_t) n) ^ ((uint64_t) n << 1)) & ((uint64_t) 1 << 63))
-
 struct node_base* alloc_node() {
     struct node_base* new_node = malloc(sizeof(struct node_app));
     new_node->gc_next = NULL;
@@ -25,7 +21,10 @@ struct node_app* alloc_app(struct node_base* l, struct node_base* r) {
 }
 
 struct node_num* alloc_num(int32_t n) {
-    return (struct node_num*) TOGGLE_MARK(n);
+    struct node_num* node = (struct node_num*) alloc_node();
+    node->base.tag = NODE_NUM;
+    node->value = n;
+    return node;
 }
 
 struct node_global* alloc_global(void (*f)(struct gmachine*), int32_t a) {
@@ -50,7 +49,7 @@ void free_node_direct(struct node_base* n) {
 }
 
 void gc_visit_node(struct node_base* n) {
-    if(IS_MARKED(n) || n->gc_reachable) return;
+    if(n->gc_reachable) return;
     n->gc_reachable = 1;
 
     if(n->tag == NODE_APP) {
@@ -170,7 +169,6 @@ void gmachine_split(struct gmachine* g, size_t n) {
 }
 
 struct node_base* gmachine_track(struct gmachine* g, struct node_base* b) {
-    if(IS_MARKED(b)) return b;
     g->gc_node_count++;
     b->gc_next = g->gc_nodes;
     g->gc_nodes = b;
@@ -210,9 +208,7 @@ void unwind(struct gmachine* g) {
 
     while(1) {
         struct node_base* peek = stack_peek(s, 0);
-        if(IS_MARKED(peek)) {
+        if(peek->tag == NODE_APP) {
-            break;
-        } else if(peek->tag == NODE_APP) {
             struct node_app* n = (struct node_app*) peek;
             stack_push(s, n->left);
         } else if(peek->tag == NODE_GLOBAL) {
@@ -238,9 +234,7 @@ void unwind(struct gmachine* g) {
 extern void f_main(struct gmachine* s);
 
 void print_node(struct node_base* n) {
-    if(IS_MARKED(n)) {
+    if(n->tag == NODE_APP) {
-        printf("%d", (int32_t) n);
-    } else if(n->tag == NODE_APP) {
         struct node_app* app = (struct node_app*) n;
         print_node(app->left);
         putchar(' ');
@@ -252,6 +246,9 @@ void print_node(struct node_base* n) {
         printf("(Global: %p)", global->function);
     } else if(n->tag == NODE_IND) {
         print_node(((struct node_ind*) n)->next);
+    } else if(n->tag == NODE_NUM) {
+        struct node_num* num = (struct node_num*) n;
+        printf("%d", num->value);
     }
 }
 

code/compiler/13/scanner.hpp

@@ -1,492 +0,0 @@
-#ifndef yyHEADER_H
-#define yyHEADER_H 1
-#define yyIN_HEADER 1
-
-#line 5 "scanner.hpp"
-
-#line 7 "scanner.hpp"
-
-#define  YY_INT_ALIGNED short int
-
-/* A lexical scanner generated by flex */
-
-#define FLEX_SCANNER
-#define YY_FLEX_MAJOR_VERSION 2
-#define YY_FLEX_MINOR_VERSION 6
-#define YY_FLEX_SUBMINOR_VERSION 4
-#if YY_FLEX_SUBMINOR_VERSION > 0
-#define FLEX_BETA
-#endif
-
-/* First, we deal with  platform-specific or compiler-specific issues. */
-
-/* begin standard C headers. */
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <stdlib.h>
-
-/* end standard C headers. */
-
-/* flex integer type definitions */
-
-#ifndef FLEXINT_H
-#define FLEXINT_H
-
-/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */
-
-#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-
-/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
- * if you want the limit (max/min) macros for int types. 
- */
-#ifndef __STDC_LIMIT_MACROS
-#define __STDC_LIMIT_MACROS 1
-#endif
-
-#include <inttypes.h>
-typedef int8_t flex_int8_t;
-typedef uint8_t flex_uint8_t;
-typedef int16_t flex_int16_t;
-typedef uint16_t flex_uint16_t;
-typedef int32_t flex_int32_t;
-typedef uint32_t flex_uint32_t;
-#else
-typedef signed char flex_int8_t;
-typedef short int flex_int16_t;
-typedef int flex_int32_t;
-typedef unsigned char flex_uint8_t; 
-typedef unsigned short int flex_uint16_t;
-typedef unsigned int flex_uint32_t;
-
-/* Limits of integral types. */
-#ifndef INT8_MIN
-#define INT8_MIN               (-128)
-#endif
-#ifndef INT16_MIN
-#define INT16_MIN              (-32767-1)
-#endif
-#ifndef INT32_MIN
-#define INT32_MIN              (-2147483647-1)
-#endif
-#ifndef INT8_MAX
-#define INT8_MAX               (127)
-#endif
-#ifndef INT16_MAX
-#define INT16_MAX              (32767)
-#endif
-#ifndef INT32_MAX
-#define INT32_MAX              (2147483647)
-#endif
-#ifndef UINT8_MAX
-#define UINT8_MAX              (255U)
-#endif
-#ifndef UINT16_MAX
-#define UINT16_MAX             (65535U)
-#endif
-#ifndef UINT32_MAX
-#define UINT32_MAX             (4294967295U)
-#endif
-
-#ifndef SIZE_MAX
-#define SIZE_MAX               (~(size_t)0)
-#endif
-
-#endif /* ! C99 */
-
-#endif /* ! FLEXINT_H */
-
-/* begin standard C++ headers. */
-
-/* TODO: this is always defined, so inline it */
-#define yyconst const
-
-#if defined(__GNUC__) && __GNUC__ >= 3
-#define yynoreturn __attribute__((__noreturn__))
-#else
-#define yynoreturn
-#endif
-
-/* An opaque pointer. */
-#ifndef YY_TYPEDEF_YY_SCANNER_T
-#define YY_TYPEDEF_YY_SCANNER_T
-typedef void* yyscan_t;
-#endif
-
-/* For convenience, these vars (plus the bison vars far below)
-   are macros in the reentrant scanner. */
-#define yyin yyg->yyin_r
-#define yyout yyg->yyout_r
-#define yyextra yyg->yyextra_r
-#define yyleng yyg->yyleng_r
-#define yytext yyg->yytext_r
-#define yylineno (YY_CURRENT_BUFFER_LVALUE->yy_bs_lineno)
-#define yycolumn (YY_CURRENT_BUFFER_LVALUE->yy_bs_column)
-#define yy_flex_debug yyg->yy_flex_debug_r
-
-/* Size of default input buffer. */
-#ifndef YY_BUF_SIZE
-#ifdef __ia64__
-/* On IA-64, the buffer size is 16k, not 8k.
- * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case.
- * Ditto for the __ia64__ case accordingly.
- */
-#define YY_BUF_SIZE 32768
-#else
-#define YY_BUF_SIZE 16384
-#endif /* __ia64__ */
-#endif
-
-#ifndef YY_TYPEDEF_YY_BUFFER_STATE
-#define YY_TYPEDEF_YY_BUFFER_STATE
-typedef struct yy_buffer_state *YY_BUFFER_STATE;
-#endif
-
-#ifndef YY_TYPEDEF_YY_SIZE_T
-#define YY_TYPEDEF_YY_SIZE_T
-typedef size_t yy_size_t;
-#endif
-
-#ifndef YY_STRUCT_YY_BUFFER_STATE
-#define YY_STRUCT_YY_BUFFER_STATE
-struct yy_buffer_state
-	{
-	FILE *yy_input_file;
-
-	char *yy_ch_buf;		/* input buffer */
-	char *yy_buf_pos;		/* current position in input buffer */
-
-	/* Size of input buffer in bytes, not including room for EOB
-	 * characters.
-	 */
-	int yy_buf_size;
-
-	/* Number of characters read into yy_ch_buf, not including EOB
-	 * characters.
-	 */
-	int yy_n_chars;
-
-	/* Whether we "own" the buffer - i.e., we know we created it,
-	 * and can realloc() it to grow it, and should free() it to
-	 * delete it.
-	 */
-	int yy_is_our_buffer;
-
-	/* Whether this is an "interactive" input source; if so, and
-	 * if we're using stdio for input, then we want to use getc()
-	 * instead of fread(), to make sure we stop fetching input after
-	 * each newline.
-	 */
-	int yy_is_interactive;
-
-	/* Whether we're considered to be at the beginning of a line.
-	 * If so, '^' rules will be active on the next match, otherwise
-	 * not.
-	 */
-	int yy_at_bol;
-
-    int yy_bs_lineno; /**< The line count. */
-    int yy_bs_column; /**< The column count. */
-
-	/* Whether to try to fill the input buffer when we reach the
-	 * end of it.
-	 */
-	int yy_fill_buffer;
-
-	int yy_buffer_status;
-
-	};
-#endif /* !YY_STRUCT_YY_BUFFER_STATE */
-
-void yyrestart ( FILE *input_file , yyscan_t yyscanner );
-void yy_switch_to_buffer ( YY_BUFFER_STATE new_buffer , yyscan_t yyscanner );
-YY_BUFFER_STATE yy_create_buffer ( FILE *file, int size , yyscan_t yyscanner );
-void yy_delete_buffer ( YY_BUFFER_STATE b , yyscan_t yyscanner );
-void yy_flush_buffer ( YY_BUFFER_STATE b , yyscan_t yyscanner );
-void yypush_buffer_state ( YY_BUFFER_STATE new_buffer , yyscan_t yyscanner );
-void yypop_buffer_state ( yyscan_t yyscanner );
-
-YY_BUFFER_STATE yy_scan_buffer ( char *base, yy_size_t size , yyscan_t yyscanner );
-YY_BUFFER_STATE yy_scan_string ( const char *yy_str , yyscan_t yyscanner );
-YY_BUFFER_STATE yy_scan_bytes ( const char *bytes, int len , yyscan_t yyscanner );
-
-void *yyalloc ( yy_size_t , yyscan_t yyscanner );
-void *yyrealloc ( void *, yy_size_t , yyscan_t yyscanner );
-void yyfree ( void * , yyscan_t yyscanner );
-
-/* Begin user sect3 */
-
-#define yywrap(yyscanner) (/*CONSTCOND*/1)
-#define YY_SKIP_YYWRAP
-
-#define yytext_ptr yytext_r
-
-#ifdef YY_HEADER_EXPORT_START_CONDITIONS
-#define INITIAL 0
-
-#endif
-
-#ifndef YY_NO_UNISTD_H
-/* Special case for "unistd.h", since it is non-ANSI. We include it way
- * down here because we want the user's section 1 to have been scanned first.
- * The user has a chance to override it with an option.
- */
-#include <unistd.h>
-#endif
-
-#ifndef YY_EXTRA_TYPE
-#define YY_EXTRA_TYPE void *
-#endif
-
-int yylex_init (yyscan_t* scanner);
-
-int yylex_init_extra ( YY_EXTRA_TYPE user_defined, yyscan_t* scanner);
-
-/* Accessor methods to globals.
-   These are made visible to non-reentrant scanners for convenience. */
-
-int yylex_destroy ( yyscan_t yyscanner );
-
-int yyget_debug ( yyscan_t yyscanner );
-
-void yyset_debug ( int debug_flag , yyscan_t yyscanner );
-
-YY_EXTRA_TYPE yyget_extra ( yyscan_t yyscanner );
-
-void yyset_extra ( YY_EXTRA_TYPE user_defined , yyscan_t yyscanner );
-
-FILE *yyget_in ( yyscan_t yyscanner );
-
-void yyset_in  ( FILE * _in_str , yyscan_t yyscanner );
-
-FILE *yyget_out ( yyscan_t yyscanner );
-
-void yyset_out  ( FILE * _out_str , yyscan_t yyscanner );
-
-			int yyget_leng ( yyscan_t yyscanner );
-
-char *yyget_text ( yyscan_t yyscanner );
-
-int yyget_lineno ( yyscan_t yyscanner );
-
-void yyset_lineno ( int _line_number , yyscan_t yyscanner );
-
-int yyget_column  ( yyscan_t yyscanner );
-
-void yyset_column ( int _column_no , yyscan_t yyscanner );
-
-/* Macros after this point can all be overridden by user definitions in
- * section 1.
- */
-
-#ifndef YY_SKIP_YYWRAP
-#ifdef __cplusplus
-extern "C" int yywrap ( yyscan_t yyscanner );
-#else
-extern int yywrap ( yyscan_t yyscanner );
-#endif
-#endif
-
-#ifndef yytext_ptr
-static void yy_flex_strncpy ( char *, const char *, int , yyscan_t yyscanner);
-#endif
-
-#ifdef YY_NEED_STRLEN
-static int yy_flex_strlen ( const char * , yyscan_t yyscanner);
-#endif
-
-#ifndef YY_NO_INPUT
-
-#endif
-
-/* Amount of stuff to slurp up with each read. */
-#ifndef YY_READ_BUF_SIZE
-#ifdef __ia64__
-/* On IA-64, the buffer size is 16k, not 8k */
-#define YY_READ_BUF_SIZE 16384
-#else
-#define YY_READ_BUF_SIZE 8192
-#endif /* __ia64__ */
-#endif
-
-/* Number of entries by which start-condition stack grows. */
-#ifndef YY_START_STACK_INCR
-#define YY_START_STACK_INCR 25
-#endif
-
-/* Default declaration of generated scanner - a define so the user can
- * easily add parameters.
- */
-#ifndef YY_DECL
-#define YY_DECL_IS_OURS 1
-
-extern int yylex (yyscan_t yyscanner);
-
-#define YY_DECL int yylex (yyscan_t yyscanner)
-#endif /* !YY_DECL */
-
-/* yy_get_previous_state - get the state just before the EOB char was reached */
-
-#undef YY_NEW_FILE
-#undef YY_FLUSH_BUFFER
-#undef yy_set_bol
-#undef yy_new_buffer
-#undef yy_set_interactive
-#undef YY_DO_BEFORE_ACTION
-
-#ifdef YY_DECL_IS_OURS
-#undef YY_DECL_IS_OURS
-#undef YY_DECL
-#endif
-
-#ifndef yy_create_buffer_ALREADY_DEFINED
-#undef yy_create_buffer
-#endif
-#ifndef yy_delete_buffer_ALREADY_DEFINED
-#undef yy_delete_buffer
-#endif
-#ifndef yy_scan_buffer_ALREADY_DEFINED
-#undef yy_scan_buffer
-#endif
-#ifndef yy_scan_string_ALREADY_DEFINED
-#undef yy_scan_string
-#endif
-#ifndef yy_scan_bytes_ALREADY_DEFINED
-#undef yy_scan_bytes
-#endif
-#ifndef yy_init_buffer_ALREADY_DEFINED
-#undef yy_init_buffer
-#endif
-#ifndef yy_flush_buffer_ALREADY_DEFINED
-#undef yy_flush_buffer
-#endif
-#ifndef yy_load_buffer_state_ALREADY_DEFINED
-#undef yy_load_buffer_state
-#endif
-#ifndef yy_switch_to_buffer_ALREADY_DEFINED
-#undef yy_switch_to_buffer
-#endif
-#ifndef yypush_buffer_state_ALREADY_DEFINED
-#undef yypush_buffer_state
-#endif
-#ifndef yypop_buffer_state_ALREADY_DEFINED
-#undef yypop_buffer_state
-#endif
-#ifndef yyensure_buffer_stack_ALREADY_DEFINED
-#undef yyensure_buffer_stack
-#endif
-#ifndef yylex_ALREADY_DEFINED
-#undef yylex
-#endif
-#ifndef yyrestart_ALREADY_DEFINED
-#undef yyrestart
-#endif
-#ifndef yylex_init_ALREADY_DEFINED
-#undef yylex_init
-#endif
-#ifndef yylex_init_extra_ALREADY_DEFINED
-#undef yylex_init_extra
-#endif
-#ifndef yylex_destroy_ALREADY_DEFINED
-#undef yylex_destroy
-#endif
-#ifndef yyget_debug_ALREADY_DEFINED
-#undef yyget_debug
-#endif
-#ifndef yyset_debug_ALREADY_DEFINED
-#undef yyset_debug
-#endif
-#ifndef yyget_extra_ALREADY_DEFINED
-#undef yyget_extra
-#endif
-#ifndef yyset_extra_ALREADY_DEFINED
-#undef yyset_extra
-#endif
-#ifndef yyget_in_ALREADY_DEFINED
-#undef yyget_in
-#endif
-#ifndef yyset_in_ALREADY_DEFINED
-#undef yyset_in
-#endif
-#ifndef yyget_out_ALREADY_DEFINED
-#undef yyget_out
-#endif
-#ifndef yyset_out_ALREADY_DEFINED
-#undef yyset_out
-#endif
-#ifndef yyget_leng_ALREADY_DEFINED
-#undef yyget_leng
-#endif
-#ifndef yyget_text_ALREADY_DEFINED
-#undef yyget_text
-#endif
-#ifndef yyget_lineno_ALREADY_DEFINED
-#undef yyget_lineno
-#endif
-#ifndef yyset_lineno_ALREADY_DEFINED
-#undef yyset_lineno
-#endif
-#ifndef yyget_column_ALREADY_DEFINED
-#undef yyget_column
-#endif
-#ifndef yyset_column_ALREADY_DEFINED
-#undef yyset_column
-#endif
-#ifndef yywrap_ALREADY_DEFINED
-#undef yywrap
-#endif
-#ifndef yyget_lval_ALREADY_DEFINED
-#undef yyget_lval
-#endif
-#ifndef yyset_lval_ALREADY_DEFINED
-#undef yyset_lval
-#endif
-#ifndef yyget_lloc_ALREADY_DEFINED
-#undef yyget_lloc
-#endif
-#ifndef yyset_lloc_ALREADY_DEFINED
-#undef yyset_lloc
-#endif
-#ifndef yyalloc_ALREADY_DEFINED
-#undef yyalloc
-#endif
-#ifndef yyrealloc_ALREADY_DEFINED
-#undef yyrealloc
-#endif
-#ifndef yyfree_ALREADY_DEFINED
-#undef yyfree
-#endif
-#ifndef yytext_ALREADY_DEFINED
-#undef yytext
-#endif
-#ifndef yyleng_ALREADY_DEFINED
-#undef yyleng
-#endif
-#ifndef yyin_ALREADY_DEFINED
-#undef yyin
-#endif
-#ifndef yyout_ALREADY_DEFINED
-#undef yyout
-#endif
-#ifndef yy_flex_debug_ALREADY_DEFINED
-#undef yy_flex_debug
-#endif
-#ifndef yylineno_ALREADY_DEFINED
-#undef yylineno
-#endif
-#ifndef yytables_fload_ALREADY_DEFINED
-#undef yytables_fload
-#endif
-#ifndef yytables_destroy_ALREADY_DEFINED
-#undef yytables_destroy
-#endif
-#ifndef yyTABLES_NAME_ALREADY_DEFINED
-#undef yyTABLES_NAME
-#endif
-
-#line 49 "/home/vanilla/projects/blog-static/code/compiler/13/scanner.l"
-
-
-#line 490 "scanner.hpp"
-#undef yyIN_HEADER
-#endif /* yyHEADER_H */

code/compiler/13/scanner.l

@@ -24,10 +24,6 @@
 \* { return yy::parser::make_TIMES(LOC); }
 - { return yy::parser::make_MINUS(LOC); }
 \/ { return yy::parser::make_DIVIDE(LOC); }
-% { return yy::parser::make_MODULO(LOC); }
-== { return yy::parser::make_EQUALS(LOC); }
-\<= { return yy::parser::make_LESS_EQUALS(LOC); }
-` { return yy::parser::make_BACKTICK(LOC); }
 [0-9]+ { return yy::parser::make_INT(atoi(yytext), LOC); }
 defn { return yy::parser::make_DEFN(LOC); }
 data { return yy::parser::make_DATA(LOC); }

code/compiler/13/type.cpp

@@ -38,10 +38,6 @@ void type_base::print(const type_mgr& mgr, std::ostream& to) const {
     to << name;
 }
 
-void type_internal::print(const type_mgr& mgr, std::ostream& to) const {
-    to << "!" << name;
-}
-
 void type_arr::print(const type_mgr& mgr, std::ostream& to) const {
     type_var* var;
     bool print_parenths = dynamic_cast<type_arr*>(mgr.resolve(left, var).get()) != nullptr;
@@ -128,8 +124,7 @@ void type_mgr::unify(type_ptr l, type_ptr r, const std::optional<yy::location>&
     } else if((lid = dynamic_cast<type_base*>(l.get())) &&
             (rid = dynamic_cast<type_base*>(r.get()))) {
         if(lid->name == rid->name &&
-                lid->arity == rid->arity &&
+                lid->arity == rid->arity)
-                lid->is_internal() == rid->is_internal())
             return;
     } else if((lapp = dynamic_cast<type_app*>(l.get())) &&
             (rapp = dynamic_cast<type_app*>(r.get()))) {

code/compiler/13/type.hpp

@@ -46,17 +46,6 @@ struct type_base : public type {
         : name(std::move(n)), arity(a) {}
 
     void print(const type_mgr& mgr, std::ostream& to) const;
-
-    virtual bool is_internal() const { return false; }
-};
-
-struct type_internal : public type_base {
-    type_internal(std::string n, int32_t a = 0)
-        : type_base(std::move(n), a) {}
-
-    void print(const type_mgr& mgr, std::ostream& to) const;
-
-    bool is_internal() const { return true; }
 };
 
 struct type_data : public type_base {