Example #1
0
File: gen.go Project: barthy1/s3cli
// generate generates offline constraints for the entire program.
func (a *analysis) generate() {
	start("Constraint generation")
	if a.log != nil {
		fmt.Fprintln(a.log, "==== Generating constraints")
	}

	// Create a dummy node since we use the nodeid 0 for
	// non-pointerlike variables.
	a.addNodes(tInvalid, "(zero)")

	// Create the global node for panic values.
	a.panicNode = a.addNodes(tEface, "panic")

	// Create nodes and constraints for all methods of reflect.rtype.
	// (Shared contours are used by dynamic calls to reflect.Type
	// methods---typically just String().)
	if rtype := a.reflectRtypePtr; rtype != nil {
		a.genMethodsOf(rtype)
	}

	root := a.genRootCalls()

	if a.config.BuildCallGraph {
		a.result.CallGraph = callgraph.New(root.fn)
	}

	// Create nodes and constraints for all methods of all types
	// that are dynamically accessible via reflection or interfaces.
	for _, T := range a.prog.RuntimeTypes() {
		a.genMethodsOf(T)
	}

	// Generate constraints for entire program.
	for len(a.genq) > 0 {
		cgn := a.genq[0]
		a.genq = a.genq[1:]
		a.genFunc(cgn)
	}

	// The runtime magically allocates os.Args; so should we.
	if os := a.prog.ImportedPackage("os"); os != nil {
		// In effect:  os.Args = new([1]string)[:]
		T := types.NewSlice(types.Typ[types.String])
		obj := a.addNodes(sliceToArray(T), "<command-line args>")
		a.endObject(obj, nil, "<command-line args>")
		a.addressOf(T, a.objectNode(nil, os.Var("Args")), obj)
	}

	// Discard generation state, to avoid confusion after node renumbering.
	a.panicNode = 0
	a.globalval = nil
	a.localval = nil
	a.localobj = nil

	stop("Constraint generation")
}
Example #2
0
// createParams creates parameters for wrapper method fn based on its
// Signature.Params, which do not include the receiver.
// start is the index of the first regular parameter to use.
//
func createParams(fn *Function, start int) {
	var last *Parameter
	tparams := fn.Signature.Params()
	for i, n := start, tparams.Len(); i < n; i++ {
		last = fn.addParamObj(tparams.At(i))
	}
	if fn.Signature.Variadic() {
		last.typ = types.NewSlice(last.typ)
	}
}
Example #3
0
// ArrayOrSliceType = "[" [ int ] "]" Type .
func (p *parser) parseArrayOrSliceType(pkg *types.Package) types.Type {
	p.expect('[')
	if p.tok == ']' {
		p.next()
		return types.NewSlice(p.parseType(pkg))
	}

	n := p.parseInt()
	p.expect(']')
	return types.NewArray(p.parseType(pkg), n)
}
Example #4
0
// Param = Name ["..."] Type .
func (p *parser) parseParam(pkg *types.Package) (param *types.Var, isVariadic bool) {
	name := p.parseName()
	if p.tok == '.' {
		p.next()
		p.expect('.')
		p.expect('.')
		isVariadic = true
	}
	typ := p.parseType(pkg)
	if isVariadic {
		typ = types.NewSlice(typ)
	}
	param = types.NewParam(token.NoPos, pkg, name, typ)
	return
}
Example #5
0
// Type =
//	BasicType | TypeName | ArrayType | SliceType | StructType |
//      PointerType | FuncType | InterfaceType | MapType | ChanType |
//      "(" Type ")" .
//
// BasicType   = ident .
// TypeName    = ExportedName .
// SliceType   = "[" "]" Type .
// PointerType = "*" Type .
// FuncType    = "func" Signature .
//
func (p *parser) parseType() types.Type {
	switch p.tok {
	case scanner.Ident:
		switch p.lit {
		default:
			return p.parseBasicType()
		case "struct":
			return p.parseStructType()
		case "func":
			// FuncType
			p.next()
			return p.parseSignature(nil)
		case "interface":
			return p.parseInterfaceType()
		case "map":
			return p.parseMapType()
		case "chan":
			return p.parseChanType()
		}
	case '@':
		// TypeName
		pkg, name := p.parseExportedName()
		return declTypeName(pkg, name).Type()
	case '[':
		p.next() // look ahead
		if p.tok == ']' {
			// SliceType
			p.next()
			return types.NewSlice(p.parseType())
		}
		return p.parseArrayType()
	case '*':
		// PointerType
		p.next()
		return types.NewPointer(p.parseType())
	case '<':
		return p.parseChanType()
	case '(':
		// "(" Type ")"
		p.next()
		typ := p.parseType()
		p.expect(')')
		return typ
	}
	p.errorf("expected type, got %s (%q)", scanner.TokenString(p.tok), p.lit)
	return nil
}
Example #6
0
// Parameter = ( identifier | "?" ) [ "..." ] Type [ string_lit ] .
//
func (p *parser) parseParameter() (par *types.Var, isVariadic bool) {
	_, name := p.parseName(false)
	// remove gc-specific parameter numbering
	if i := strings.Index(name, "·"); i >= 0 {
		name = name[:i]
	}
	if p.tok == '.' {
		p.expectSpecial("...")
		isVariadic = true
	}
	typ := p.parseType()
	if isVariadic {
		typ = types.NewSlice(typ)
	}
	// ignore argument tag (e.g. "noescape")
	if p.tok == scanner.String {
		p.next()
	}
	// TODO(gri) should we provide a package?
	par = types.NewVar(token.NoPos, nil, name, typ)
	return
}
Example #7
0
func (c *funcContext) translateConversion(expr ast.Expr, desiredType types.Type) *expression {
	exprType := c.p.TypeOf(expr)
	if types.Identical(exprType, desiredType) {
		return c.translateExpr(expr)
	}

	if c.p.Pkg.Path() == "reflect" {
		if call, isCall := expr.(*ast.CallExpr); isCall && types.Identical(c.p.TypeOf(call.Fun), types.Typ[types.UnsafePointer]) {
			if ptr, isPtr := desiredType.(*types.Pointer); isPtr {
				if named, isNamed := ptr.Elem().(*types.Named); isNamed {
					switch named.Obj().Name() {
					case "arrayType", "chanType", "funcType", "interfaceType", "mapType", "ptrType", "sliceType", "structType":
						return c.formatExpr("%e.kindType", call.Args[0]) // unsafe conversion
					default:
						return c.translateExpr(expr)
					}
				}
			}
		}
	}

	switch t := desiredType.Underlying().(type) {
	case *types.Basic:
		switch {
		case isInteger(t):
			basicExprType := exprType.Underlying().(*types.Basic)
			switch {
			case is64Bit(t):
				if !is64Bit(basicExprType) {
					if basicExprType.Kind() == types.Uintptr { // this might be an Object returned from reflect.Value.Pointer()
						return c.formatExpr("new %1s(0, %2e.constructor === Number ? %2e : 1)", c.typeName(desiredType), expr)
					}
					return c.formatExpr("new %s(0, %e)", c.typeName(desiredType), expr)
				}
				return c.formatExpr("new %1s(%2h, %2l)", c.typeName(desiredType), expr)
			case is64Bit(basicExprType):
				if !isUnsigned(t) && !isUnsigned(basicExprType) {
					return c.fixNumber(c.formatParenExpr("%1l + ((%1h >> 31) * 4294967296)", expr), t)
				}
				return c.fixNumber(c.formatExpr("%s.$low", c.translateExpr(expr)), t)
			case isFloat(basicExprType):
				return c.formatParenExpr("%e >> 0", expr)
			case types.Identical(exprType, types.Typ[types.UnsafePointer]):
				return c.translateExpr(expr)
			default:
				return c.fixNumber(c.translateExpr(expr), t)
			}
		case isFloat(t):
			if t.Kind() == types.Float32 && exprType.Underlying().(*types.Basic).Kind() == types.Float64 {
				return c.formatExpr("$fround(%e)", expr)
			}
			return c.formatExpr("%f", expr)
		case isComplex(t):
			return c.formatExpr("new %1s(%2r, %2i)", c.typeName(desiredType), expr)
		case isString(t):
			value := c.translateExpr(expr)
			switch et := exprType.Underlying().(type) {
			case *types.Basic:
				if is64Bit(et) {
					value = c.formatExpr("%s.$low", value)
				}
				if isNumeric(et) {
					return c.formatExpr("$encodeRune(%s)", value)
				}
				return value
			case *types.Slice:
				if types.Identical(et.Elem().Underlying(), types.Typ[types.Rune]) {
					return c.formatExpr("$runesToString(%s)", value)
				}
				return c.formatExpr("$bytesToString(%s)", value)
			default:
				panic(fmt.Sprintf("Unhandled conversion: %v\n", et))
			}
		case t.Kind() == types.UnsafePointer:
			if unary, isUnary := expr.(*ast.UnaryExpr); isUnary && unary.Op == token.AND {
				if indexExpr, isIndexExpr := unary.X.(*ast.IndexExpr); isIndexExpr {
					return c.formatExpr("$sliceToArray(%s)", c.translateConversionToSlice(indexExpr.X, types.NewSlice(types.Typ[types.Uint8])))
				}
				if ident, isIdent := unary.X.(*ast.Ident); isIdent && ident.Name == "_zero" {
					return c.formatExpr("new Uint8Array(0)")
				}
			}
			if ptr, isPtr := c.p.TypeOf(expr).(*types.Pointer); c.p.Pkg.Path() == "syscall" && isPtr {
				if s, isStruct := ptr.Elem().Underlying().(*types.Struct); isStruct {
					array := c.newVariable("_array")
					target := c.newVariable("_struct")
					c.Printf("%s = new Uint8Array(%d);", array, sizes32.Sizeof(s))
					c.Delayed(func() {
						c.Printf("%s = %s, %s;", target, c.translateExpr(expr), c.loadStruct(array, target, s))
					})
					return c.formatExpr("%s", array)
				}
			}
			if call, ok := expr.(*ast.CallExpr); ok {
				if id, ok := call.Fun.(*ast.Ident); ok && id.Name == "new" {
					return c.formatExpr("new Uint8Array(%d)", int(sizes32.Sizeof(c.p.TypeOf(call.Args[0]))))
				}
			}
		}

	case *types.Slice:
		switch et := exprType.Underlying().(type) {
		case *types.Basic:
			if isString(et) {
				if types.Identical(t.Elem().Underlying(), types.Typ[types.Rune]) {
					return c.formatExpr("new %s($stringToRunes(%e))", c.typeName(desiredType), expr)
				}
				return c.formatExpr("new %s($stringToBytes(%e))", c.typeName(desiredType), expr)
			}
		case *types.Array, *types.Pointer:
			return c.formatExpr("new %s(%e)", c.typeName(desiredType), expr)
		}

	case *types.Pointer:
		if s, isStruct := t.Elem().Underlying().(*types.Struct); isStruct {
			if c.p.Pkg.Path() == "syscall" && types.Identical(exprType, types.Typ[types.UnsafePointer]) {
				array := c.newVariable("_array")
				target := c.newVariable("_struct")
				return c.formatExpr("(%s = %e, %s = %e, %s, %s)", array, expr, target, c.zeroValue(t.Elem()), c.loadStruct(array, target, s), target)
			}
			return c.formatExpr("$pointerOfStructConversion(%e, %s)", expr, c.typeName(t))
		}

		if !types.Identical(exprType, types.Typ[types.UnsafePointer]) {
			exprTypeElem := exprType.Underlying().(*types.Pointer).Elem()
			ptrVar := c.newVariable("_ptr")
			getterConv := c.translateConversion(c.setType(&ast.StarExpr{X: c.newIdent(ptrVar, exprType)}, exprTypeElem), t.Elem())
			setterConv := c.translateConversion(c.newIdent("$v", t.Elem()), exprTypeElem)
			return c.formatExpr("(%1s = %2e, new %3s(function() { return %4s; }, function($v) { %1s.$set(%5s); }, %1s.$target))", ptrVar, expr, c.typeName(desiredType), getterConv, setterConv)
		}

	case *types.Interface:
		if types.Identical(exprType, types.Typ[types.UnsafePointer]) {
			return c.translateExpr(expr)
		}
	}

	return c.translateImplicitConversionWithCloning(expr, desiredType)
}
Example #8
0
func ext۰reflect۰SliceOf(fr *frame, args []value) value {
	// Signature: func (t reflect.rtype) Type
	return makeReflectType(rtype{types.NewSlice(args[0].(iface).v.(rtype).t)})
}
Example #9
0
func (fr *frame) stringToRuneSlice(v *govalue) *govalue {
	result := fr.runtime.stringToIntArray.call(fr, v.value)
	runeslice := types.NewSlice(types.Typ[types.Rune])
	return newValue(result[0], runeslice)
}
Example #10
0
func newRuntimeInterface(module llvm.Module, tm *llvmTypeMap) (*runtimeInterface, error) {
	var ri runtimeInterface

	Bool := types.Typ[types.Bool]
	Complex128 := types.Typ[types.Complex128]
	Float64 := types.Typ[types.Float64]
	Int32 := types.Typ[types.Int32]
	Int64 := types.Typ[types.Int64]
	Int := types.Typ[types.Int]
	Rune := types.Typ[types.Rune]
	String := types.Typ[types.String]
	Uintptr := types.Typ[types.Uintptr]
	UnsafePointer := types.Typ[types.UnsafePointer]

	EmptyInterface := types.NewInterface(nil, nil)
	IntSlice := types.NewSlice(types.Typ[types.Int])

	for _, rt := range [...]struct {
		name      string
		rfi       *runtimeFnInfo
		args, res []types.Type
		attrs     []llvm.Attribute
	}{
		{
			name: "__go_append",
			rfi:  &ri.append,
			args: []types.Type{IntSlice, UnsafePointer, Uintptr, Uintptr},
			res:  []types.Type{IntSlice},
		},
		{
			name: "__go_assert_interface",
			rfi:  &ri.assertInterface,
			args: []types.Type{UnsafePointer, UnsafePointer},
			res:  []types.Type{UnsafePointer},
		},
		{
			name: "__go_can_recover",
			rfi:  &ri.canRecover,
			args: []types.Type{UnsafePointer},
			res:  []types.Type{Bool},
		},
		{
			name: "__go_chan_cap",
			rfi:  &ri.chanCap,
			args: []types.Type{UnsafePointer},
			res:  []types.Type{Int},
		},
		{
			name: "__go_chan_len",
			rfi:  &ri.chanLen,
			args: []types.Type{UnsafePointer},
			res:  []types.Type{Int},
		},
		{
			name: "runtime.chanrecv2",
			rfi:  &ri.chanrecv2,
			args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
			res:  []types.Type{Bool},
		},
		{
			name: "__go_check_defer",
			rfi:  &ri.checkDefer,
			args: []types.Type{UnsafePointer},
		},
		{
			name: "__go_check_interface_type",
			rfi:  &ri.checkInterfaceType,
			args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
		},
		{
			name: "__go_builtin_close",
			rfi:  &ri.builtinClose,
			args: []types.Type{UnsafePointer},
		},
		{
			name: "__go_convert_interface",
			rfi:  &ri.convertInterface,
			args: []types.Type{UnsafePointer, UnsafePointer},
			res:  []types.Type{UnsafePointer},
		},
		{
			name: "__go_copy",
			rfi:  &ri.copy,
			args: []types.Type{UnsafePointer, UnsafePointer, Uintptr},
		},
		{
			name: "__go_defer",
			rfi:  &ri.Defer,
			args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
		},
		{
			name: "__go_deferred_recover",
			rfi:  &ri.deferredRecover,
			res:  []types.Type{EmptyInterface},
		},
		{
			name: "__go_empty_interface_compare",
			rfi:  &ri.emptyInterfaceCompare,
			args: []types.Type{EmptyInterface, EmptyInterface},
			res:  []types.Type{Int},
		},
		{
			name: "__go_get_closure",
			rfi:  &ri.getClosure,
			res:  []types.Type{UnsafePointer},
		},
		{
			name: "__go_go",
			rfi:  &ri.Go,
			args: []types.Type{UnsafePointer, UnsafePointer},
		},
		{
			name: "runtime.ifaceE2I2",
			rfi:  &ri.ifaceE2I2,
			args: []types.Type{UnsafePointer, EmptyInterface},
			res:  []types.Type{EmptyInterface, Bool},
		},
		{
			name: "runtime.ifaceI2I2",
			rfi:  &ri.ifaceI2I2,
			args: []types.Type{UnsafePointer, EmptyInterface},
			res:  []types.Type{EmptyInterface, Bool},
		},
		{
			name: "__go_int_array_to_string",
			rfi:  &ri.intArrayToString,
			args: []types.Type{UnsafePointer, Int},
			res:  []types.Type{String},
		},
		{
			name: "__go_int_to_string",
			rfi:  &ri.intToString,
			args: []types.Type{Int},
			res:  []types.Type{String},
		},
		{
			name: "__go_interface_compare",
			rfi:  &ri.interfaceCompare,
			args: []types.Type{EmptyInterface, EmptyInterface},
			res:  []types.Type{Int},
		},
		{
			name: "__go_make_slice2",
			rfi:  &ri.makeSlice,
			args: []types.Type{UnsafePointer, Uintptr, Uintptr},
			res:  []types.Type{IntSlice},
		},
		{
			name: "runtime.mapdelete",
			rfi:  &ri.mapdelete,
			args: []types.Type{UnsafePointer, UnsafePointer},
		},
		{
			name: "runtime.mapiter2",
			rfi:  &ri.mapiter2,
			args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
		},
		{
			name: "runtime.mapiterinit",
			rfi:  &ri.mapiterinit,
			args: []types.Type{UnsafePointer, UnsafePointer},
		},
		{
			name: "runtime.mapiternext",
			rfi:  &ri.mapiternext,
			args: []types.Type{UnsafePointer},
		},
		{
			name: "__go_map_index",
			rfi:  &ri.mapIndex,
			args: []types.Type{UnsafePointer, UnsafePointer, Bool},
			res:  []types.Type{UnsafePointer},
		},
		{
			name: "__go_map_len",
			rfi:  &ri.mapLen,
			args: []types.Type{UnsafePointer},
			res:  []types.Type{Int},
		},
		{
			name: "__go_new",
			rfi:  &ri.New,
			args: []types.Type{Uintptr},
			res:  []types.Type{UnsafePointer},
		},
		{
			name: "__go_new_channel",
			rfi:  &ri.newChannel,
			args: []types.Type{UnsafePointer, Uintptr},
			res:  []types.Type{UnsafePointer},
		},
		{
			name: "__go_new_map",
			rfi:  &ri.newMap,
			args: []types.Type{UnsafePointer, Uintptr},
			res:  []types.Type{UnsafePointer},
		},
		{
			name: "__go_new_nopointers",
			rfi:  &ri.NewNopointers,
			args: []types.Type{Uintptr},
			res:  []types.Type{UnsafePointer},
		},
		{
			name: "runtime.newselect",
			rfi:  &ri.newSelect,
			args: []types.Type{Int32},
			res:  []types.Type{UnsafePointer},
		},
		{
			name:  "__go_panic",
			rfi:   &ri.panic,
			args:  []types.Type{EmptyInterface},
			attrs: []llvm.Attribute{llvm.NoReturnAttribute},
		},
		{
			name: "__go_print_bool",
			rfi:  &ri.printBool,
			args: []types.Type{Bool},
		},
		{
			name: "__go_print_complex",
			rfi:  &ri.printComplex,
			args: []types.Type{Complex128},
		},
		{
			name: "__go_print_double",
			rfi:  &ri.printDouble,
			args: []types.Type{Float64},
		},
		{
			name: "__go_print_empty_interface",
			rfi:  &ri.printEmptyInterface,
			args: []types.Type{EmptyInterface},
		},
		{
			name: "__go_print_interface",
			rfi:  &ri.printInterface,
			args: []types.Type{EmptyInterface},
		},
		{
			name: "__go_print_int64",
			rfi:  &ri.printInt64,
			args: []types.Type{Int64},
		},
		{
			name: "__go_print_nl",
			rfi:  &ri.printNl,
		},
		{
			name: "__go_print_pointer",
			rfi:  &ri.printPointer,
			args: []types.Type{UnsafePointer},
		},
		{
			name: "__go_print_slice",
			rfi:  &ri.printSlice,
			args: []types.Type{IntSlice},
		},
		{
			name: "__go_print_space",
			rfi:  &ri.printSpace,
		},
		{
			name: "__go_print_string",
			rfi:  &ri.printString,
			args: []types.Type{String},
		},
		{
			name: "__go_print_uint64",
			rfi:  &ri.printUint64,
			args: []types.Type{Int64},
		},
		{
			name: "__go_receive",
			rfi:  &ri.receive,
			args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
		},
		{
			name: "__go_recover",
			rfi:  &ri.recover,
			res:  []types.Type{EmptyInterface},
		},
		{
			name: "__go_register_gc_roots",
			rfi:  &ri.registerGcRoots,
			args: []types.Type{UnsafePointer},
		},
		{
			name:  "__go_runtime_error",
			rfi:   &ri.runtimeError,
			args:  []types.Type{Int32},
			attrs: []llvm.Attribute{llvm.NoReturnAttribute},
		},
		{
			name: "runtime.selectdefault",
			rfi:  &ri.selectdefault,
			args: []types.Type{UnsafePointer, Int32},
		},
		{
			name: "runtime.selectgo",
			rfi:  &ri.selectgo,
			args: []types.Type{UnsafePointer},
			res:  []types.Type{Int},
		},
		{
			name: "runtime.selectrecv2",
			rfi:  &ri.selectrecv2,
			args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer, Int32},
		},
		{
			name: "runtime.selectsend",
			rfi:  &ri.selectsend,
			args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer, Int32},
		},
		{
			name: "__go_send_big",
			rfi:  &ri.sendBig,
			args: []types.Type{UnsafePointer, UnsafePointer, UnsafePointer},
		},
		{
			name: "__go_set_closure",
			rfi:  &ri.setClosure,
			args: []types.Type{UnsafePointer},
		},
		{
			name: "__go_set_defer_retaddr",
			rfi:  &ri.setDeferRetaddr,
			args: []types.Type{UnsafePointer},
			res:  []types.Type{Bool},
		},
		{
			name: "__go_strcmp",
			rfi:  &ri.strcmp,
			args: []types.Type{String, String},
			res:  []types.Type{Int},
		},
		{
			name: "__go_string_plus",
			rfi:  &ri.stringPlus,
			args: []types.Type{String, String},
			res:  []types.Type{String},
		},
		{
			name: "__go_string_slice",
			rfi:  &ri.stringSlice,
			args: []types.Type{String, Int, Int},
			res:  []types.Type{String},
		},
		{
			name: "__go_string_to_int_array",
			rfi:  &ri.stringToIntArray,
			args: []types.Type{String},
			res:  []types.Type{IntSlice},
		},
		{
			name: "runtime.stringiter2",
			rfi:  &ri.stringiter2,
			args: []types.Type{String, Int},
			res:  []types.Type{Int, Rune},
		},
		{
			name: "__go_type_descriptors_equal",
			rfi:  &ri.typeDescriptorsEqual,
			args: []types.Type{UnsafePointer, UnsafePointer},
			res:  []types.Type{Bool},
		},
		{
			name: "__go_undefer",
			rfi:  &ri.undefer,
			args: []types.Type{UnsafePointer},
		},
	} {
		rt.rfi.init(tm, module, rt.name, rt.args, rt.res)
		for _, attr := range rt.attrs {
			rt.rfi.fn.AddFunctionAttr(attr)
		}
	}

	memsetName := "llvm.memset.p0i8.i" + strconv.Itoa(tm.target.IntPtrType().IntTypeWidth())
	memsetType := llvm.FunctionType(
		llvm.VoidType(),
		[]llvm.Type{
			llvm.PointerType(llvm.Int8Type(), 0),
			llvm.Int8Type(),
			tm.target.IntPtrType(),
			llvm.Int32Type(),
			llvm.Int1Type(),
		},
		false,
	)
	ri.memset = llvm.AddFunction(module, memsetName, memsetType)

	memcpyName := "llvm.memcpy.p0i8.p0i8.i" + strconv.Itoa(tm.target.IntPtrType().IntTypeWidth())
	memcpyType := llvm.FunctionType(
		llvm.VoidType(),
		[]llvm.Type{
			llvm.PointerType(llvm.Int8Type(), 0),
			llvm.PointerType(llvm.Int8Type(), 0),
			tm.target.IntPtrType(),
			llvm.Int32Type(),
			llvm.Int1Type(),
		},
		false,
	)
	ri.memcpy = llvm.AddFunction(module, memcpyName, memcpyType)

	returnaddressType := llvm.FunctionType(
		llvm.PointerType(llvm.Int8Type(), 0),
		[]llvm.Type{llvm.Int32Type()},
		false,
	)
	ri.returnaddress = llvm.AddFunction(module, "llvm.returnaddress", returnaddressType)

	gccgoPersonalityType := llvm.FunctionType(
		llvm.Int32Type(),
		[]llvm.Type{
			llvm.Int32Type(),
			llvm.Int64Type(),
			llvm.PointerType(llvm.Int8Type(), 0),
			llvm.PointerType(llvm.Int8Type(), 0),
		},
		false,
	)
	ri.gccgoPersonality = llvm.AddFunction(module, "__gccgo_personality_v0", gccgoPersonalityType)

	ri.gccgoExceptionType = llvm.StructType(
		[]llvm.Type{
			llvm.PointerType(llvm.Int8Type(), 0),
			llvm.Int32Type(),
		},
		false,
	)

	return &ri, nil
}