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compiler.go
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compiler.go
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package main
import (
"fmt"
"github.com/llir/llvm/ir"
"github.com/llir/llvm/ir/constant"
"github.com/llir/llvm/ir/enum"
"github.com/llir/llvm/ir/types"
"github.com/llir/llvm/ir/value"
"os"
"strconv"
"strings"
)
type CompileScope struct {
variables map[string]value.Value
Parent *CompileScope
Children []*CompileScope
funcs map[string]*ir.Func
// TODO Shorthands map[string]value.Value // Like this.a -> just a if it is not defined in the scope
}
func (s *CompileScope) Lookup(name string) value.Value {
if s.variables[name] != nil {
return s.variables[name]
}
if s.Parent != nil {
return s.Parent.Lookup(name)
}
panic("No variable found: " + name)
}
func (s *CompileScope) Define(name string, v value.Value) {
if s.variables[name] != nil {
panic("Duplicate variable: " + name)
}
s.variables[name] = v
}
const entryBlock string = "entry"
type fieldIndexKey struct {
field, typ string
}
type Compiler struct {
module *ir.Module
currentScope *CompileScope
currentBlock *ir.Block
currentFunc *ir.Func
currentType types.Type
funcs map[string]*ir.Func
types map[string]types.Type
typesIndexMap map[fieldIndexKey]int
globals map[string]value.Value
pkg *Package
importMap map[string]bool
importAliasMap map[string]bool
sequence int
}
func (c *Compiler) PackageName() string {
return c.pkg.Name
}
func (c *Compiler) GetSequence() string {
c.sequence += 1
return fmt.Sprintf("%d", c.sequence)
}
func (c *Compiler) Define(name string, v value.Value) {
c.currentScope.Define(name, v)
}
func (c *Compiler) Lookup(name string) value.Value {
return c.currentScope.Lookup(name)
}
func (c *Compiler) compile() {
Assert(c.pkg != nil, "pkg is nil")
Assert(c.module != nil, "file is nil")
c.importAliasMap = make(map[string]bool)
for _, stmt := range c.pkg.Stmts {
switch stmt := stmt.(type) {
case *UseStmt:
c.compileUseStmt(stmt)
}
}
for _, stmt := range c.pkg.Stmts {
switch stmt := stmt.(type) {
case *StructDefStmt:
c.compileStructDef(stmt)
}
}
for _, stmt := range c.pkg.Stmts {
switch stmt := stmt.(type) {
case *VarDefStmt:
c.compileVarDef(stmt)
}
}
for _, stmt := range c.pkg.Stmts {
switch stmt := stmt.(type) {
case *FuncDefStmt:
c.compileFunc(stmt, false, nil, true)
case *ImplStmt:
thisType := c.resolveType(stmt.Type)
for _, s := range stmt.Stmts {
switch implStmt := s.(type) {
case *FuncDefStmt:
implStmt.ImplOf = stmt
c.compileFunc(implStmt, true, thisType, true)
}
}
}
}
for _, stmt := range c.pkg.Stmts {
switch stmt := stmt.(type) {
case *VarDefStmt:
default:
c.compileStmt(stmt)
}
}
if len(c.funcs["init"].Blocks) == 0 {
c.funcs["init"].NewBlock(entryBlock)
}
for _, block := range c.funcs["init"].Blocks {
if block.Term == nil {
block.NewRet(nil)
}
}
}
func (c *Compiler) initBuiltinTypes() {
// we have already built-in types in llvm, so we don't have to re-define them
// just add them to the dictionary so that make them accessible in the compiler
if c.types == nil {
c.types = make(map[string]types.Type)
c.typesIndexMap = make(map[fieldIndexKey]int)
}
c.types["void"] = types.Void
c.types["i8"] = types.I8
c.types["i16"] = types.I16
c.types["i32"] = types.I32
c.types["i64"] = types.I64
c.types["bool"] = types.I1
c.types["char"] = types.I8
c.types["f16"] = types.Half
c.types["f32"] = types.Float
c.types["f64"] = types.Double
sliceX := types.NewStruct(
types.NewPointer(types.NewPointer(types.I8)),
types.NewInt(64),
types.NewInt(64),
)
sliceDef := c.module.NewTypeDef("slice", sliceX)
c.types["slice"] = sliceDef
stringStruct := types.NewStruct(types.NewPointer(types.I8), types.I64, types.I64)
def := c.module.NewTypeDef("string", stringStruct)
c.types["string"] = def
errorTyp := types.NewStruct(
c.types["string"], c.types["i32"])
errorDef := c.module.NewTypeDef("error", errorTyp)
c.types["error"] = errorDef
c.typesIndexMap[fieldIndexKey{
field: "message",
typ: "error",
}] = 0
c.typesIndexMap[fieldIndexKey{
field: "error_code",
typ: "error",
}] = 1
jmpBufTyp := types.NewPointer(types.I32)
jmpBufDef := c.module.NewTypeDef("jmp_buf", jmpBufTyp)
c.types["jmp_buf"] = jmpBufDef
}
func (c *Compiler) NewPassByValueParameter(name string, typ types.Type) *ir.Param {
param := ir.NewParam(name, types.NewPointer(typ))
param.Attrs = make([]ir.ParamAttribute, 0)
param.Attrs = append(param.Attrs, PassByValue{Typ: typ})
return param
}
func (c *Compiler) NewReturnParameter(name string, typ types.Type) *ir.Param {
param := ir.NewParam(name, types.NewPointer(typ))
param.Attrs = make([]ir.ParamAttribute, 0)
param.Attrs = append(param.Attrs, ir.SRet{Typ: typ})
param.Attrs = append(param.Attrs, enum.ParamAttrNoAlias)
return param
}
func (c *Compiler) initBuiltinFuncs() {
module := c.module
if c.funcs == nil {
c.funcs = make(map[string]*ir.Func)
}
printfInternal := module.NewFunc("printf_internal", types.I32, ir.NewParam("", types.NewPointer(c.types["char"])))
printfInternal.Sig.Variadic = true
printfInternal.Linkage = enum.LinkageExternal
c.funcs["printf_internal"] = printfInternal
makeString := module.NewFunc("make_string", c.types["void"], c.NewReturnParameter("", c.types["string"]), ir.NewParam("buffer", types.NewPointer(types.I8)))
makeString.Linkage = enum.LinkageExternal
c.funcs["make_string"] = makeString
concatStrings := module.NewFunc("concat_strings", c.types["void"], c.NewReturnParameter("", c.types["string"]),
c.NewPassByValueParameter("strA", c.types["string"]),
c.NewPassByValueParameter("strB", c.types["string"]))
concatStrings.Linkage = enum.LinkageExternal
c.funcs["concat_strings"] = concatStrings
concatCharAndString := module.NewFunc("concat_char_and_string", c.types["void"],
c.NewReturnParameter("", c.types["string"]), ir.NewParam("", c.types["char"]),
c.NewPassByValueParameter("", c.types["string"]))
concatCharAndString.Linkage = enum.LinkageExternal
c.funcs["concat_char_and_string"] = concatCharAndString
concatStringAndChar := module.NewFunc("concat_string_and_char", c.types["void"],
c.NewReturnParameter("", c.types["string"]), c.NewPassByValueParameter("", c.types["string"]),
ir.NewParam("", c.types["char"]))
concatStringAndChar.Linkage = enum.LinkageExternal
c.funcs["concat_string_and_char"] = concatStringAndChar
concatCharAndChar := module.NewFunc("concat_char_and_char", c.types["void"],
c.NewReturnParameter("", c.types["string"]),
ir.NewParam("", c.types["char"]),
ir.NewParam("", c.types["char"]))
concatCharAndChar.Linkage = enum.LinkageExternal
c.funcs["concat_char_and_char"] = concatCharAndChar
scanfInternal := module.NewFunc("scanf_internal", types.I32, ir.NewParam("", c.types["string"]))
scanfInternal.Sig.Variadic = true
scanfInternal.Linkage = enum.LinkageExternal
c.funcs["scanf_internal"] = scanfInternal
strlenInternal := module.NewFunc("strlen_internal", types.I64, ir.NewParam("", c.types["string"]))
strlenInternal.Linkage = enum.LinkageExternal
c.funcs["strlen_internal"] = strlenInternal
mallocInternal := module.NewFunc("malloc_internal", types.NewPointer(types.I8), ir.NewParam("size", types.I64))
mallocInternal.Linkage = enum.LinkageExternal
c.funcs["malloc_internal"] = mallocInternal
memcpyInternal := module.NewFunc("memcpy_internal", types.NewPointer(types.I8),
ir.NewParam("dest", types.NewPointer(types.I8)),
ir.NewParam("src", types.NewPointer(types.I8)),
ir.NewParam("sizeof_i64", types.I64),
)
memcpyInternal.Linkage = enum.LinkageExternal
c.funcs["memcpy_internal"] = memcpyInternal
compareString := module.NewFunc("compare_string", types.I1,
c.NewPassByValueParameter("", c.types["string"]),
c.NewPassByValueParameter("", c.types["string"]))
c.funcs["compare_string"] = compareString
makeSlice := module.NewFunc("make_slice", types.Void,
c.NewReturnParameter("returnVal", c.types["slice"]))
makeSlice.Linkage = enum.LinkageExternal
c.funcs["make_slice"] = makeSlice
accessSliceIndex := module.NewFunc("access_slice_data",
types.I64, c.NewPassByValueParameter("slice", c.types["slice"]), ir.NewParam("", types.I64))
accessSliceIndex.Linkage = enum.LinkageExternal
c.funcs["access_slice_data"] = accessSliceIndex
accessSliceIndexP := module.NewFunc("access_slice_datap",
types.I64, c.NewPassByValueParameter("slice", c.types["slice"]), ir.NewParam("", types.I64))
accessSliceIndex.Linkage = enum.LinkageExternal
c.funcs["access_slice_datap"] = accessSliceIndexP
appendSliceData := module.NewFunc("append_slice_data",
types.Void, ir.NewParam("", types.NewPointer(c.types["slice"])), ir.NewParam("", types.NewPointer(types.I8)))
appendSliceData.Linkage = enum.LinkageExternal
c.funcs["append"] = appendSliceData
appendSliceDatap := module.NewFunc("append_slice_datap",
types.Void, ir.NewParam("", types.NewPointer(c.types["slice"])), ir.NewParam("", types.NewPointer(types.I8)))
appendSliceData.Linkage = enum.LinkageExternal
c.funcs["appendp"] = appendSliceDatap
lenSlice := module.NewFunc("len_slice", types.I64, c.NewPassByValueParameter("", c.types["slice"]))
lenSlice.Linkage = enum.LinkageExternal
c.funcs["len"] = lenSlice
printStrFn := module.NewFunc("__print_str__", types.Void, c.NewPassByValueParameter("str", c.types["string"]))
printStrFn.Linkage = enum.LinkageExternal
c.funcs["__print_str__"] = printStrFn
printI8Fn := module.NewFunc("__print_i8__", types.Void, ir.NewParam("", c.types["i8"]))
printI8Fn.Linkage = enum.LinkageExternal
c.funcs["__print_i8__"] = printI8Fn
printI16Fn := module.NewFunc("__print_i16__", types.Void, ir.NewParam("", c.types["i16"]))
printI16Fn.Linkage = enum.LinkageExternal
c.funcs["__print_i16__"] = printI16Fn
printI32Fn := module.NewFunc("__print_i32__", types.Void, ir.NewParam("", c.types["i32"]))
printI32Fn.Linkage = enum.LinkageExternal
c.funcs["__print_i32__"] = printI32Fn
printI64Fn := module.NewFunc("__print_i64__", types.Void, ir.NewParam("", c.types["i64"]))
printI64Fn.Linkage = enum.LinkageExternal
c.funcs["__print_i64__"] = printI64Fn
printF16Fn := module.NewFunc("__print_f16__", types.Void, ir.NewParam("", c.types["f16"]))
printF16Fn.Linkage = enum.LinkageExternal
c.funcs["__print_f16__"] = printF16Fn
printF32Fn := module.NewFunc("__print_f32__", types.Void, ir.NewParam("", c.types["f32"]))
printF32Fn.Linkage = enum.LinkageExternal
c.funcs["__print_f32__"] = printF32Fn
printF64Fn := module.NewFunc("__print_f64__", types.Void, ir.NewParam("", c.types["f64"]))
printF64Fn.Linkage = enum.LinkageExternal
c.funcs["__print_f64__"] = printF64Fn
printCharFn := module.NewFunc("__print_char__", types.Void, ir.NewParam("_", c.types["char"]))
printCharFn.Linkage = enum.LinkageExternal
c.funcs["__print_char__"] = printCharFn
printCharPFn := module.NewFunc("__print_charp__", types.Void, ir.NewParam("_", types.NewPointer(c.types["char"])))
printCharPFn.Linkage = enum.LinkageExternal
c.funcs["__print_charp__"] = printCharPFn
printLnFn := module.NewFunc("__print_ln__", types.Void)
printLnFn.Linkage = enum.LinkageExternal
c.funcs["__print_ln__"] = printLnFn
printBoolFn := module.NewFunc("__print__bool__", types.Void, ir.NewParam("_", c.types["bool"]))
printBoolFn.Linkage = enum.LinkageExternal
c.funcs["__print_bool__"] = printBoolFn
addExceptionFn := module.NewFunc("____add__exception____", types.Void, ir.NewParam("err", types.NewPointer(c.types["error"])))
addExceptionFn.Linkage = enum.LinkageExternal
c.funcs["@____add__exception____@"] = addExceptionFn
pushNewExceptionEnvFn := module.NewFunc("____push_new_exception_env____", types.I64)
pushNewExceptionEnvFn.Linkage = enum.LinkageExternal
c.funcs["@____push_new_exception_env____@"] = pushNewExceptionEnvFn
popExceptionEnvFn := module.NewFunc("____pop_exception_env____", types.I64)
popExceptionEnvFn.Linkage = enum.LinkageExternal
c.funcs["@____pop_exception_env____@"] = popExceptionEnvFn
getLastExceptionEnvFn := module.NewFunc("____get_last_exception_env____", types.I64)
getLastExceptionEnvFn.Linkage = enum.LinkageExternal
c.funcs["@____get_last_exception_env____@"] = getLastExceptionEnvFn
setJmpFn := module.NewFunc("setjmp", types.I32, ir.NewParam("env", c.types["jmp_buf"]))
setJmpFn.Linkage = enum.LinkageExternal
c.funcs["setjmp"] = setJmpFn
longJmpFn := module.NewFunc("longjmp", types.Void, ir.NewParam("env", c.types["jmp_buf"]), ir.NewParam("value", types.I32))
longJmpFn.Linkage = enum.LinkageExternal
c.funcs["longjmp"] = longJmpFn
getLastExceptionInstanceFn := module.NewFunc("____get__last__exception__instance____", types.NewPointer(c.types["error"]))
getLastExceptionInstanceFn.Linkage = enum.LinkageExternal
c.funcs["@____get__last__exception__instance____@"] = getLastExceptionInstanceFn
c.addToStrFuncs("i8", "i16", "i32", "i64", "f16", "f32", "f64", "bool")
initFn := module.NewFunc("__"+c.PackageName()+"__"+"__init__", types.Void)
c.funcs["init"] = initFn
gcCollectStartFn := module.NewFunc("gc_collect_start", types.Void)
gcCollectStartFn.Linkage = enum.LinkageExternal
c.funcs["__gc__collect__start__"] = gcCollectStartFn
}
func (c *Compiler) addToStrFuncs(names ...string) {
for _, name := range names {
n := fmt.Sprintf("__%s_to_string__", name)
fn := c.module.NewFunc(n, types.Void,
c.NewReturnParameter("str", c.types["string"]), ir.NewParam("p", c.types[name]))
fn.Linkage = enum.LinkageExternal
c.funcs[n] = fn
}
}
func (c *Compiler) selectorToStr(expr Expr) string {
switch expr := expr.(type) {
case *IdentExpr:
return expr.Name
case *SelectorExpr:
return c.selectorToStr(expr.Selector) + "." + c.selectorToStr(expr.Ident)
default:
panic("unimplemented selectorToStr case")
}
}
func (c *Compiler) resolveType(expr Expr) types.Type {
switch expr := expr.(type) {
case *IdentExpr:
if typ, ok := c.types[expr.Name]; ok {
return typ
}
panic(fmt.Sprintf("no provided type %s", expr.Name))
case *RefTypeExpr:
typ := c.resolveType(expr.Expr)
return types.NewPointer(typ)
case *ArrayTypeExpr:
typ := c.resolveType(expr.Type)
if expr.Size.(*NumberExpr).Value == -1 {
return c.types["slice"]
}
return types.NewArray(uint64(expr.Size.(*NumberExpr).Value), typ)
case *SelectorExpr:
name := c.selectorToStr(expr)
if typ, ok := c.types[name]; ok {
return typ
}
panic(fmt.Sprintf("no provided type %s", name))
}
panic("unreachable")
}
func (c *Compiler) defineType(expr Expr) types.Type {
Assert(c.types != nil, "un-initialized type map")
panic("TODO")
}
func (c *Compiler) isNull(r value.Value) bool {
_, ok := r.(*constant.Null)
return ok
}
func (c *Compiler) initGlobalVarDef(stmt *VarDefStmt) {
typ := c.resolveType(stmt.Type)
c.currentType = typ
name := c.PackageName() + "." + stmt.Name.Name
global := c.module.NewGlobal(name, typ)
global.Init = c.getDefaultValue(typ)
c.Define(stmt.Name.Name, global)
initFn := c.funcs["init"]
if !stmt.ctx.isInitiated && len(initFn.Blocks) == 0 {
c.currentBlock = initFn.NewBlock(entryBlock)
}
}
func (c *Compiler) compileVarDef(stmt *VarDefStmt) {
Assert(c.currentScope != nil, "un-initialized scope")
var ptr value.Value
typ := c.resolveType(stmt.Type)
c.currentType = typ
if stmt.ctx.isGlobal {
c.initGlobalVarDef(stmt)
ptr = c.getAlloca(stmt.Name.Name)
if stmt.ctx.isInitiated {
return
}
} else {
ptr = c.currentBlock.NewAlloca(typ)
c.Define(stmt.Name.Name, ptr)
}
Assert(c.currentBlock != nil, "currentBlock cannot be nil")
if stmt.Init != nil {
right := c.compileExpr(stmt.Init)
if !c.isStorable(stmt.Context()) {
// do memcpy from returned alloca
switch r := right.(type) {
case *ir.InstLoad:
c.memcpyInternal(ptr, r.Src)
default:
c.memcpyInternal(ptr, right)
}
return
}
switch right.Type().(type) {
case *types.ArrayType:
c.currentBlock.NewStore(right, ptr)
case *types.PointerType:
if c.isNull(right) {
cast := c.currentBlock.NewBitCast(right, typ)
c.currentBlock.NewStore(cast, ptr)
} else if !typ.Equal(right.Type()) {
load := c.currentBlock.NewLoad(types.NewPointer(typ.(*types.PointerType).ElemType), right)
cast := c.currentBlock.NewBitCast(load, typ)
c.currentBlock.NewStore(cast, ptr)
} else {
c.currentBlock.NewStore(right, ptr)
}
case *types.FloatType:
c.currentBlock.NewStore(right, ptr)
default:
c.currentBlock.NewStore(right, ptr)
}
}
}
func (c *Compiler) compileFunc(def *FuncDefStmt, isMethod bool, thisType types.Type, onlyDeclare bool) *ir.Func {
Assert(def.Name != nil, "type checker has to handle this")
Assert(def.Name.Name != "", "name can't be empty")
name := def.Name.Name
if isMethod {
name = fmt.Sprintf("%s.%s", def.ImplOf.Type.(*IdentExpr).Name, name)
}
var llvmName = name
if name == "main" {
name = "__main__"
llvmName = "__main__"
} else {
llvmName = c.PackageName() + "." + name
}
c.currentScope = &CompileScope{
variables: make(map[string]value.Value),
Parent: c.currentScope,
Children: make([]*CompileScope, 0),
}
defer func() { c.currentScope = c.currentScope.Parent }()
typ := c.resolveType(def.Type)
params := make([]*ir.Param, 0)
if isMethod {
param := ir.NewParam("this", types.NewPointer(thisType))
params = append(params, param)
c.Define("this", param)
}
if t, ok := typ.(*types.StructType); ok {
// struct types should be passed as parameter by the llvm standards
returnParam := ir.NewParam("returnVal", types.NewPointer(t))
returnParam.Attrs = make([]ir.ParamAttribute, 0)
returnParam.Attrs = append(returnParam.Attrs, ir.SRet{Typ: t})
returnParam.Attrs = append(returnParam.Attrs, enum.ParamAttrNoAlias)
params = append(params, returnParam)
typ = types.Void
}
for _, def := range def.Params {
Assert(def.Name.Name != "this", "param name cannot be this")
typ2 := c.resolveType(def.Type)
var param *ir.Param
if t2, ok := typ2.(*types.StructType); ok {
param = ir.NewParam(def.Name.Name, types.NewPointer(t2))
param.Attrs = make([]ir.ParamAttribute, 0)
param.Attrs = append(param.Attrs, PassByValue{Typ: t2})
} else {
param = ir.NewParam(def.Name.Name, typ2)
}
params = append(params, param)
c.Define(def.Name.Name, param)
}
var f *ir.Func
if onlyDeclare {
if !def.IsExternal {
f = c.module.NewFunc(llvmName, typ, params...)
} else {
f = c.module.NewFunc(name, typ, params...)
}
c.funcs[llvmName] = f
} else {
f = c.funcs[llvmName]
}
c.currentFunc = f
if !def.IsExternal {
if !onlyDeclare {
block := f.NewBlock(entryBlock)
c.currentBlock = block
c.currentBlock.LocalID = 12
if def.Context().returnsStruct || def.Context().ExpectedType() == "string" {
var returnParam *ir.Param
for _, p := range f.Params {
if p.Name() == "returnVal" {
returnParam = p
}
}
def.Context().returnParam = returnParam
}
for _, innerStmt := range def.Body.Stmts {
c.compileStmt(innerStmt)
}
if _, ok := typ.(*types.VoidType); ok && c.currentBlock.Term == nil {
c.currentBlock.NewRet(nil)
}
}
} else {
Assert(!isMethod, "Methods cannot be external")
f.Linkage = enum.LinkageExternal
}
return f
}
func (c *Compiler) compileStructDef(def *StructDefStmt) {
if c.types[def.Name.Name] != nil {
return
}
str := types.NewStruct()
td := c.module.NewTypeDef(c.PackageName()+"."+def.Name.Name, str)
c.types[def.Name.Name] = td
for i, field := range def.Fields {
typ := c.resolveType(field.Type)
str.Fields = append(str.Fields, typ)
c.typesIndexMap[fieldIndexKey{field.Name.Name, c.PackageName() + "." + def.Name.Name}] = i
}
}
func (c *Compiler) getNumericConstant(number float64, typ string) constant.Constant {
if typ == "f16" {
return constant.NewFloat(types.Half, number)
} else if typ == "f32" {
return constant.NewFloat(types.Float, number)
} else if typ == "f64" {
return constant.NewFloat(types.Double, number)
} else if typ == "i8" {
return constant.NewInt(types.I8, int64(number))
} else if typ == "i16" {
return constant.NewInt(types.I16, int64(number))
} else if typ == "i32" {
return constant.NewInt(types.I32, int64(number))
} else if typ == "i64" {
return constant.NewInt(types.I64, int64(number))
} else if typ == "char" {
return constant.NewInt(types.I8, int64(number))
}
return constant.NewInt(types.I32, int64(number))
}
func (c *Compiler) compileTypeImports(stmt *UseStmt, typeDefs []*TypeDef) {
for _, typeDef := range typeDefs {
if typeDef.IsBuiltin {
continue
}
name := stmt.useCtx.Alias + "." + typeDef.Name
if typeDef.ReferredFrom == nil {
typ := c.findType(stmt.useCtx.Module.Module.TypeDefs, typeDef.Package+"."+typeDef.Name)
typ2 := *(typ.(*types.StructType))
if _, ok := c.types[typeDef.Package+"."+typeDef.Name]; !ok {
t := c.module.NewTypeDef(typeDef.Package+"."+typeDef.Name, &typ2)
c.types[typeDef.Package+"."+typeDef.Name] = t
}
c.types[name] = &typ2
for i, field := range typeDef.Fields {
c.typesIndexMap[fieldIndexKey{
field: field.Name,
typ: typeDef.Package + "." + typeDef.Name,
}] = i
}
} else {
c.types[name] = c.findType(c.module.TypeDefs, typeDef.ReferredFrom.Package+"."+typeDef.ReferredFrom.Name)
}
}
}
func (c *Compiler) compileUseStmt(stmt *UseStmt) {
_, ok2 := c.importAliasMap[stmt.useCtx.Alias]
funcDefs := stmt.useCtx.Module.FuncDef
globals := stmt.useCtx.Module.Globals
typeDefs := stmt.useCtx.Module.TypeDefs
if !ok2 {
c.importAliasMap[stmt.useCtx.Alias] = true
c.compileTypeImports(stmt, typeDefs)
}
if !stmt.useCtx.Module.Compiled {
stmt.useCtx.Module.Compiled = true
c.compileImportFuncs(stmt, funcDefs)
}
for _, global := range globals {
d := c.module.NewGlobal(global.Package+"."+global.Name, c.types[global.Type])
d.ExternallyInitialized = true
d.Linkage = enum.LinkageExternal
c.Define(stmt.useCtx.Alias+"."+global.Name, d)
}
}
func (c *Compiler) compileImportFuncs(stmt *UseStmt, funcDefs []*FuncDef) {
for _, funcDef := range funcDefs {
if funcDef.IsBuiltin {
continue
}
var name string
if funcDef.External {
name = funcDef.Name
} else {
name = funcDef.Package + "."
if funcDef.MethodOf != "" {
name = name + funcDef.MethodOf + "."
}
name = name + funcDef.Name
}
var fn = c.findFunc(stmt.useCtx.Module.Module.Funcs, name)
decl := c.cloneFuncDecl(fn)
decl.Linkage = enum.LinkageExternal
c.funcs[name] = decl
}
}
func (c *Compiler) cloneFuncDecl(fn *ir.Func) *ir.Func {
name := fn.Name()
retTyp := fn.Sig.RetType
params := fn.Params
newFn := c.module.NewFunc(name, retTyp, params...)
newFn.ReturnAttrs = fn.ReturnAttrs
newFn.FuncAttrs = fn.FuncAttrs
return newFn
}
func (c *Compiler) findFunc(funcs []*ir.Func, name string) *ir.Func {
for _, fn_ := range funcs {
if fn_.Name() == name {
return fn_
}
}
return nil
}
func (c *Compiler) findType(types []types.Type, name string) types.Type {
for _, typ := range types {
if typ.Name() == name {
return typ
}
}
return nil
}
func (c *Compiler) compileStmt(stmt Stmt) {
switch innerStmt := stmt.(type) {
case *ReturnStmt:
if innerStmt.Value == nil {
c.currentBlock.NewRet(nil)
} else {
if innerStmt.Context().returnsStruct || innerStmt.Context().ExpectedType() == "string" {
param := innerStmt.Context().returnParam
val := c.compileExpr(innerStmt.Value)
if _, ok := val.(*ir.InstAlloca); ok {
c.memcpyInternal(param, val)
} else {
c.currentBlock.NewStore(val, param)
}
c.currentBlock.NewRet(nil)
} else {
val := c.compileExpr(innerStmt.Value)
// TODO pass type of pointer and return directly instead bit cast
if c.isNull(val) {
name := innerStmt.Context().returnTypeSym.TypeName()
typ := c.resolveType(&RefTypeExpr{Expr: &IdentExpr{Name: name}})
cast := c.currentBlock.NewBitCast(val, typ)
c.currentBlock.NewRet(cast)
return
}
c.currentBlock.NewRet(val)
}
}
case *BreakStmt:
c.currentBlock.NewBr(innerStmt.ctx.breakBlock)
case *ContinueStmt:
c.currentBlock.NewBr(innerStmt.ctx.continueBlock)
case *ExprStmt:
c.compileExpr(innerStmt.Expr)
case *IfStmt:
c.compileIfStmt(innerStmt)
case *FuncDefStmt:
c.compileFunc(innerStmt, false, nil, false)
case *VarDefStmt:
c.compileVarDef(innerStmt)
case *ForStmt:
c.compileForStmt(innerStmt)
case *StructDefStmt:
c.compileStructDef(innerStmt)
case *BlockStmt:
seenBreakingStmt := false
for _, innerStmt := range innerStmt.Stmts {
if seenBreakingStmt {
break
}
c.compileStmt(innerStmt)
switch innerStmt.(type) {
case *BreakStmt, *ContinueStmt, *ReturnStmt:
seenBreakingStmt = true
}
}
case *ImplStmt:
thisType := c.resolveType(innerStmt.Type)
for _, s := range innerStmt.Stmts {
switch implStmt := s.(type) {
case *FuncDefStmt:
implStmt.ImplOf = innerStmt // make sure the correct impl is used
c.compileFunc(implStmt, true, thisType, false)
}
}
case *IncrStmt:
e := c.compileExpr(innerStmt.Expr)
val := generateOperation(c.currentBlock, e, c.getNumericConstant(1.0, innerStmt.Type), Add)
c.currentBlock.NewStore(val, e.(*ir.InstLoad).Src)
case *DecrStmt:
e := c.compileExpr(innerStmt.Expr)
val := generateOperation(c.currentBlock, e, c.getNumericConstant(1.0, innerStmt.Type), Sub)
c.currentBlock.NewStore(val, e.(*ir.InstLoad).Src)
case *UseStmt:
// pass
case *CatchClause:
c.currentBlock.NewCall(c.getFunc("@____pop_exception_env____@"))
if innerStmt != nil {
if len(innerStmt.Params) > 0 {
alloca := c.currentBlock.NewAlloca(types.NewPointer(c.types["error"]))
arg := c.currentBlock.NewCall(c.getFunc("@____get__last__exception__instance____@"))
c.currentBlock.NewStore(arg, alloca)
c.Define(innerStmt.Params[0].Name.Name, alloca)
}
c.compileStmt(innerStmt.Block)
}
case *TryCatchStmt:
data := c.currentBlock.NewCall(c.getFunc("@____push_new_exception_env____@"))
alloca := c.currentBlock.NewAlloca(c.types["jmp_buf"])
c.currentBlock.NewStore(c.currentBlock.NewIntToPtr(data, c.types["jmp_buf"]), alloca)
v2 := c.currentBlock.NewLoad(c.types["jmp_buf"], alloca)
v := c.currentBlock.NewCall(c.getFunc("setjmp"), v2)
name := c.PackageName() + "." + c.currentFunc.Name() + "." + "tryBlock." + c.GetSequence()
alloc2 := c.currentBlock.NewAlloca(types.I32)
c.currentBlock.NewStore(v, alloc2)
c.Define(name, alloc2)
// TODO refactor compileIfStmt structure to handle both of try-catch and if stmts
c.compileIfStmt(&IfStmt{
Cond: &BinaryExpr{
Left: &IdentExpr{Name: name},
Right: &NumberExpr{Value: 0, ctx: &VarAssignCtx{
parent: nil,
expectedType: "i32",
isGlobal: false,
}},
Op: Neq,
Ctx: &BinaryExprCtx{
OpInfo: operationInfo{"i32", Neq, "i32"},
expectedType: "bool",
ResultType: "bool",
},
},
Then: innerStmt.CatchBlock,
Else: innerStmt.TryBlock,
start: Pos{},
})
case *ThrowStmt:
data := c.currentBlock.NewCall(c.getFunc("@____get_last_exception_env____@"))
alloca := c.currentBlock.NewAlloca(c.types["jmp_buf"])
c.currentBlock.NewStore(c.currentBlock.NewIntToPtr(data, c.types["jmp_buf"]), alloca)
v := c.currentBlock.NewLoad(c.types["jmp_buf"], alloca)
arg := c.compileExpr(innerStmt.Arg)
c.currentBlock.NewCall(c.getFunc("@____add__exception____@"), arg)
c.currentBlock.NewCall(c.getFunc("longjmp"), v, constant.NewInt(types.I32, 0))
default:
panic("unreachable compileStmt on compiler")
}
}
func (c *Compiler) compileIfStmt(stmt *IfStmt) {
seq := c.GetSequence()
cond := c.compileExpr(stmt.Cond)
thenBlock := c.currentFunc.NewBlock("if_then_" + seq)
continueBlock := c.currentFunc.NewBlock("if_continue_" + seq)
var elseBlock *ir.Block = continueBlock
if stmt.Else != nil {
elseBlock = c.currentFunc.NewBlock("else_" + seq)
}
c.currentBlock.NewCondBr(cond, thenBlock, elseBlock)
c.currentBlock = thenBlock
c.currentScope = &CompileScope{
variables: make(map[string]value.Value),
Parent: c.currentScope,
Children: make([]*CompileScope, 0),
funcs: make(map[string]*ir.Func),
}
c.compileStmt(stmt.Then)
c.currentScope = c.currentScope.Parent
if thenBlock.Term == nil {
thenBlock.NewBr(continueBlock)
}
if c.currentBlock.Term == nil {
c.currentBlock.NewBr(continueBlock)
}
if stmt.Else != nil {
c.currentBlock = elseBlock
c.currentScope = &CompileScope{
variables: make(map[string]value.Value),
Parent: c.currentScope,
Children: make([]*CompileScope, 0),
funcs: make(map[string]*ir.Func),
}
c.compileStmt(stmt.Else)
c.currentScope = c.currentScope.Parent
}
if c.currentBlock.Term == nil {
c.currentBlock.NewBr(continueBlock)
}
c.currentBlock = continueBlock
}
/*
initBlock -> condBlock -> forBlock -> stepBlock -> condBlock
-> funcBlock
initBlock -> condBlock -> forBlock -> ifBlock -> continueBlock -> stepBlock -> condBlock
-> funcBlock
initBlock -> condBlock -> forBlock -> stepperBlock -> condBlock
-> parentBlockContinue
*/
func (c *Compiler) compileForStmt(stmt *ForStmt) {
c.currentScope = &CompileScope{
variables: make(map[string]value.Value),
Parent: c.currentScope,
Children: make([]*CompileScope, 0),
funcs: make(map[string]*ir.Func),
}
defer func() { c.currentScope = c.currentScope.Parent }()
seq := c.GetSequence()
stmt.ctx.breakBlock = c.currentFunc.NewBlock("for_break_block_" + seq)
initBlock := c.currentFunc.NewBlock("init_" + seq)
forBlock := c.currentFunc.NewBlock("for_body_" + seq)
condBlock := c.currentFunc.NewBlock("for_cond_" + seq)
stepBlock := c.currentFunc.NewBlock("step_" + seq)
stmt.ctx.forBlock = forBlock
stmt.ctx.condBlock = condBlock
stmt.ctx.stepBlock = stepBlock
stmt.ctx.initBlock = initBlock
stmt.ctx.continueBlock = condBlock
c.currentBlock.NewBr(initBlock)
c.currentBlock = initBlock
if stmt.Init != nil {
c.compileStmt(stmt.Init)
}
initBlock.NewBr(condBlock)
c.currentBlock = condBlock
condBlock.NewCondBr(c.compileExpr(stmt.Cond), forBlock, stmt.ctx.breakBlock)
if stmt.Step != nil {
c.currentBlock = stepBlock
stmt.ctx.continueBlock = stepBlock
c.compileStmt(stmt.Step)
stepBlock.NewBr(condBlock)
} else {
stepBlock.NewBr(condBlock)
}
c.currentBlock = forBlock
c.compileStmt(stmt.Body)
if c.currentBlock != forBlock && c.currentBlock.Term == nil {
c.currentBlock.NewBr(stmt.ctx.continueBlock)
}
if forBlock.Term == nil {