Files
llgo/ssa/ssa_test.go
2024-08-05 17:25:13 +08:00

726 lines
19 KiB
Go

/*
* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ssa
import (
"go/constant"
"go/token"
"go/types"
"testing"
"unsafe"
"github.com/goplus/gogen/packages"
"github.com/goplus/llvm"
)
func TestEndDefer(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("foo", "foo")
fn := pkg.NewFunc("main", NoArgsNoRet, InC)
b := fn.MakeBody(1)
fn.defer_ = &aDefer{}
fn.endDefer(b)
}
func TestUnsafeString(t *testing.T) {
prog := NewProgram(nil)
prog.SetRuntime(func() *types.Package {
fset := token.NewFileSet()
imp := packages.NewImporter(fset)
pkg, _ := imp.Import(PkgRuntime)
return pkg
})
pkg := prog.NewPackage("foo", "foo")
b := pkg.NewFunc("main", NoArgsNoRet, InC).MakeBody(1)
b.Println(b.BuiltinCall("String", b.CStr("hello"), prog.Val(5)))
b.Return()
}
func TestPointerSize(t *testing.T) {
expected := unsafe.Sizeof(uintptr(0))
if size := NewProgram(nil).PointerSize(); size != int(expected) {
t.Fatal("bad PointerSize:", size)
}
}
func TestSetBlock(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Log("SetBlock: no error?")
}
}()
fn := &aFunction{}
b := &aBuilder{Func: fn}
b.SetBlock(&aBasicBlock{})
}
func TestSetBlockEx(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Log("SetBlockEx: no error?")
}
}()
fn := &aFunction{}
b := &aBuilder{Func: fn}
b.SetBlockEx(&aBasicBlock{fn: fn}, -1, false)
}
func TestSetPython(t *testing.T) {
prog := NewProgram(nil)
typ := types.NewPackage("foo", "foo")
prog.SetPython(typ)
}
func TestClosureCtx(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Log("closureCtx: no error?")
}
}()
var f aFunction
f.closureCtx(nil)
}
func TestTypes(t *testing.T) {
ctx := llvm.NewContext()
llvmIntType(ctx, 4)
intT := types.NewVar(0, nil, "", types.Typ[types.Int])
ret := types.NewTuple(intT, intT)
sig := types.NewSignatureType(nil, nil, nil, nil, ret, false)
prog := NewProgram(nil)
prog.retType(sig)
}
func TestIndexType(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Log("indexType: no error?")
}
}()
indexType(types.Typ[types.Int])
}
func TestCvtType(t *testing.T) {
gt := newGoTypes()
params := types.NewTuple(types.NewParam(0, nil, "", NoArgsNoRet))
sig := types.NewSignatureType(nil, nil, nil, params, nil, false)
ret1 := gt.cvtFunc(sig, nil)
if ret1 == sig {
t.Fatal("cvtFunc failed")
}
defer func() {
if r := recover(); r == nil {
t.Log("cvtType: no error?")
}
}()
gt.cvtType(nil)
}
func TestUserdefExpr(t *testing.T) {
c := &pyVarTy{}
b := &builtinTy{}
_ = c.String()
_ = b.String()
test := func(a types.Type) {
defer func() {
if r := recover(); r == nil {
t.Log("TestUserdefExpr: no error?")
}
}()
a.Underlying()
}
test(c)
test(b)
}
func TestAny(t *testing.T) {
prog := NewProgram(nil)
prog.SetRuntime(func() *types.Package {
ret := types.NewPackage("runtime", "runtime")
scope := ret.Scope()
name := types.NewTypeName(0, ret, "Eface", nil)
types.NewNamed(name, types.NewStruct(nil, nil), nil)
scope.Insert(name)
return ret
})
prog.Any()
}
func assertPkg(t *testing.T, p Package, expected string) {
t.Helper()
if v := p.String(); v != expected {
t.Fatalf("\n==> got:\n%s\n==> expected:\n%s\n", v, expected)
}
}
func TestPyFunc(t *testing.T) {
prog := NewProgram(nil)
py := types.NewPackage("foo", "foo")
o := types.NewTypeName(0, py, "Object", nil)
types.NewNamed(o, types.Typ[types.Int], nil)
py.Scope().Insert(o)
prog.SetPython(py)
pkg := prog.NewPackage("bar", "foo/bar")
a := pkg.PyNewFunc("a", NoArgsNoRet, false)
if pkg.PyNewFunc("a", NoArgsNoRet, false) != a {
t.Fatal("NewPyFunc(a) failed")
}
foo := pkg.PyNewModVar("foo", false)
if pkg.PyNewModVar("foo", false) != foo {
t.Fatal("NewPyModVar(foo) failed")
}
}
func TestVar(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
typ := types.NewPointer(types.Typ[types.Int])
a := pkg.NewVar("a", typ, InGo)
if pkg.NewVar("a", typ, InGo) != a {
t.Fatal("NewVar(a) failed")
}
pkg.NewVarEx("a", prog.Type(typ, InGo))
a.Init(prog.Val(100))
b := pkg.NewVar("b", typ, InGo)
b.Init(a.Expr)
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
@a = global i64 100, align 8
@b = global i64 @a, align 8
`)
}
func TestConst(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Bool]))
sig := types.NewSignatureType(nil, nil, nil, nil, rets, false)
b := pkg.NewFunc("fn", sig, InGo).MakeBody(1)
b.Return(b.Const(constant.MakeBool(true), prog.Bool()))
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define i1 @fn() {
_llgo_0:
ret i1 true
}
`)
}
func TestStruct(t *testing.T) {
empty := types.NewStruct(nil, nil)
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
pkg.NewVar("a", types.NewPointer(empty), InGo)
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
@a = external global {}, align 1
`)
if prog.NeedRuntime {
t.Fatal("NeedRuntime?")
}
}
func TestNamedStruct(t *testing.T) {
src := types.NewPackage("bar", "foo/bar")
empty := types.NewNamed(types.NewTypeName(0, src, "Empty", nil), types.NewStruct(nil, nil), nil)
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
pkg.NewVar("a", types.NewPointer(empty), InGo)
if pkg.VarOf("a") == nil {
t.Fatal("VarOf failed")
}
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
%bar.Empty = type {}
@a = external global %bar.Empty, align 1
`)
}
func TestDeclFunc(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(types.NewVar(0, nil, "a", types.Typ[types.Int]))
sig := types.NewSignatureType(nil, nil, nil, params, nil, false)
pkg.NewFunc("fn", sig, InGo)
if pkg.FuncOf("fn") == nil {
t.Fatal("FuncOf failed")
}
if prog.retType(sig) != prog.Void() {
t.Fatal("retType failed")
}
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
declare void @fn(i64)
`)
}
func TestBasicFunc(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(
types.NewVar(0, nil, "a", types.Typ[types.Int]),
types.NewVar(0, nil, "b", types.Typ[types.Float64]))
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, false)
pkg.NewFunc("fn", sig, InGo).MakeBody(1).
Return(prog.Val(1))
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define i64 @fn(i64 %0, double %1) {
_llgo_0:
ret i64 1
}
`)
}
func TestFuncParam(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(
types.NewVar(0, nil, "a", types.Typ[types.Int]),
types.NewVar(0, nil, "b", types.Typ[types.Float64]))
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, false)
fn := pkg.NewFunc("fn", sig, InGo)
fn.MakeBody(1).Return(fn.Param(0))
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define i64 @fn(i64 %0, double %1) {
_llgo_0:
ret i64 %0
}
`)
}
func TestFuncCall(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(
types.NewVar(0, nil, "a", types.Typ[types.Int]),
types.NewVar(0, nil, "b", types.Typ[types.Float64]))
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, false)
fn := pkg.NewFunc("fn", sig, InGo)
fn.MakeBody(1).
Return(prog.Val(1))
b := pkg.NewFunc("main", NoArgsNoRet, InGo).MakeBody(1)
b.Call(fn.Expr, prog.Val(1), prog.Val(1.2))
b.Return()
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define i64 @fn(i64 %0, double %1) {
_llgo_0:
ret i64 1
}
define void @main() {
_llgo_0:
%0 = call i64 @fn(i64 1, double 1.200000e+00)
ret void
}
`)
}
func TestFuncMultiRet(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(
types.NewVar(0, nil, "b", types.Typ[types.Float64]))
rets := types.NewTuple(
types.NewVar(0, nil, "c", types.Typ[types.Int]),
types.NewVar(0, nil, "d", types.Typ[types.Float64]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, false)
a := pkg.NewVar("a", types.NewPointer(types.Typ[types.Int]), InGo)
fn := pkg.NewFunc("fn", sig, InGo)
b := fn.MakeBody(1)
b.Return(a.Expr, fn.Param(0))
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
@a = external global i64, align 8
define { i64, double } @fn(double %0) {
_llgo_0:
%1 = alloca { i64, double }, align 8
%2 = getelementptr inbounds { i64, double }, ptr %1, i32 0, i32 0
store ptr @a, ptr %2, align 8
%3 = getelementptr inbounds { i64, double }, ptr %1, i32 0, i32 1
store double %0, ptr %3, align 8
%4 = load { i64, double }, ptr %1, align 8
ret { i64, double } %4
}
`)
}
func TestJump(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
fn := pkg.NewFunc("loop", NoArgsNoRet, InGo)
b := fn.MakeBody(1)
b.Jump(fn.Block(0))
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define void @loop() {
_llgo_0:
br label %_llgo_0
}
`)
}
func TestIf(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(types.NewVar(0, nil, "a", types.Typ[types.Int]))
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, false)
fn := pkg.NewFunc("fn", sig, InGo)
b := fn.MakeBody(3)
iftrue := fn.Block(1)
iffalse := fn.Block(2)
if iftrue.Index() != 1 || iftrue.Parent() != fn {
t.Fatal("iftrue")
}
cond := b.BinOp(token.GTR, fn.Param(0), prog.Val(0))
b.If(cond, iftrue, iffalse)
b.SetBlock(iftrue).Return(prog.Val(1))
b.SetBlock(iffalse).Return(prog.Val(0))
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define i64 @fn(i64 %0) {
_llgo_0:
%1 = icmp sgt i64 %0, 0
br i1 %1, label %_llgo_1, label %_llgo_2
_llgo_1: ; preds = %_llgo_0
ret i64 1
_llgo_2: ; preds = %_llgo_0
ret i64 0
}
`)
}
func TestPrintf(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
pchar := types.NewPointer(types.Typ[types.Int8])
params := types.NewTuple(types.NewVar(0, nil, "format", pchar), VArg())
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int32]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, true)
pkg.NewFunc("printf", sig, InC)
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
declare i32 @printf(ptr, ...)
`)
}
func TestBinOp(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(
types.NewVar(0, nil, "a", types.Typ[types.Int]),
types.NewVar(0, nil, "b", types.Typ[types.Float64]))
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, false)
fn := pkg.NewFunc("fn", sig, InGo)
b := fn.MakeBody(1)
ret := b.BinOp(token.ADD, fn.Param(0), prog.Val(1))
b.Return(ret)
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define i64 @fn(i64 %0, double %1) {
_llgo_0:
%2 = add i64 %0, 1
ret i64 %2
}
`)
}
func TestUnOp(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(
types.NewVar(0, nil, "p", types.NewPointer(types.Typ[types.Int])),
)
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, false)
fn := pkg.NewFunc("fn", sig, InGo)
b := fn.MakeBody(1)
ptr := fn.Param(0)
val := b.UnOp(token.MUL, ptr)
val2 := b.BinOp(token.XOR, val, prog.Val(1))
b.Store(ptr, val2)
b.Return(val2)
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define i64 @fn(ptr %0) {
_llgo_0:
%1 = load i64, ptr %0, align 4
%2 = xor i64 %1, 1
store i64 %2, ptr %0, align 4
ret i64 %2
}
`)
}
func TestBasicType(t *testing.T) {
type typeInfo struct {
typ Type
kind types.BasicKind
}
prog := NewProgram(nil)
infos := []*typeInfo{
{prog.Bool(), types.Bool},
{prog.Byte(), types.Byte},
{prog.Int(), types.Int},
{prog.Uint(), types.Uint},
{prog.Int32(), types.Int32},
{prog.Int64(), types.Int64},
{prog.Uint32(), types.Uint32},
{prog.Uint64(), types.Uint64},
{prog.Uintptr(), types.Uintptr},
{prog.VoidPtr(), types.UnsafePointer},
}
for _, info := range infos {
if info.typ.RawType() != types.Typ[info.kind] {
t.Fatal("bad type", info)
}
}
}
func TestCompareSelect(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
params := types.NewTuple(
types.NewVar(0, nil, "a", types.Typ[types.Int]),
types.NewVar(0, nil, "b", types.Typ[types.Int]),
types.NewVar(0, nil, "c", types.Typ[types.Int]),
)
rets := types.NewTuple(types.NewVar(0, nil, "", types.Typ[types.Int]))
sig := types.NewSignatureType(nil, nil, nil, params, rets, false)
fn := pkg.NewFunc("fn", sig, InGo)
b := fn.MakeBody(1)
result := b.compareSelect(token.GTR, fn.Param(0), fn.Param(1), fn.Param(2))
b.Return(result)
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define i64 @fn(i64 %0, i64 %1, i64 %2) {
_llgo_0:
%3 = icmp sgt i64 %0, %1
%4 = select i1 %3, i64 %0, i64 %1
%5 = icmp sgt i64 %4, %2
%6 = select i1 %5, i64 %4, i64 %2
ret i64 %6
}
`)
}
func TestLLVMTrap(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
b := pkg.NewFunc("fn", NoArgsNoRet, InGo).MakeBody(1)
b.LLVMTrap()
b.Unreachable()
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define void @fn() {
_llgo_0:
call void @llvm.trap()
unreachable
}
; Function Attrs: cold noreturn nounwind memory(inaccessiblemem: write)
declare void @llvm.trap() #0
attributes #0 = { cold noreturn nounwind memory(inaccessiblemem: write) }
`)
}
func TestCoroFuncs(t *testing.T) {
prog := NewProgram(nil)
pkg := prog.NewPackage("bar", "foo/bar")
fn := pkg.NewFunc("fn", NoArgsNoRet, InGo)
entryBlk := fn.MakeBlock("entry")
suspdBlk := fn.MakeBlock("suspend")
cleanBlk := fn.MakeBlock("clean")
b := fn.NewBuilder()
b.async = true
b.SetBlock(entryBlk)
align := b.Const(constant.MakeInt64(0), prog.Int32())
align8 := b.Const(constant.MakeInt64(8), prog.Int32())
null := b.Const(nil, b.Prog.CIntPtr())
b.promise = null
id := b.CoID(align, null, null, null)
bf := b.Const(constant.MakeBool(false), prog.Bool())
b.CoSizeI32()
size := b.CoSizeI64()
b.CoAlignI32()
b.CoAlignI64()
b.CoAlloc(id)
frame := b.Alloca(size)
hdl := b.CoBegin(id, frame)
b.SetBlock(cleanBlk)
b.CoFree(id, frame)
b.Jump(suspdBlk)
b.SetBlock(suspdBlk)
b.CoEnd(hdl, bf, prog.TokenNone())
// b.Return(b.promise)
b.SetBlock(entryBlk)
b.CoResume(hdl)
b.CoDone(hdl)
b.CoDestroy(hdl)
b.CoPromise(null, align8, bf)
b.CoNoop()
b.CoFrame()
setArgs := types.NewTuple(types.NewVar(0, nil, "value", types.Typ[types.Int]))
setSig := types.NewSignatureType(nil, nil, nil, setArgs, nil, false)
setFn := pkg.NewFunc("setValue", setSig, InGo)
one := b.Const(constant.MakeInt64(1), prog.Int())
b.onSuspBlk = func(next BasicBlock) (BasicBlock, BasicBlock, BasicBlock) {
return suspdBlk, next, cleanBlk
}
b.CoYield(setFn, one, bf)
b.CoReturn(setFn, one)
assertPkg(t, pkg, `; ModuleID = 'foo/bar'
source_filename = "foo/bar"
define void @fn() {
entry:
%0 = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%1 = call i32 @llvm.coro.size.i32()
%2 = call i64 @llvm.coro.size.i64()
%3 = call i32 @llvm.coro.align.i32()
%4 = call i64 @llvm.coro.align.i64()
%5 = call i1 @llvm.coro.alloc(token %0)
%6 = alloca i8, i64 %2, align 1
%7 = call ptr @llvm.coro.begin(token %0, ptr %6)
call void @llvm.coro.resume(ptr %7)
%8 = call i1 @llvm.coro.done(ptr %7)
%9 = zext i1 %8 to i64
%10 = trunc i64 %9 to i8
call void @llvm.coro.destroy(ptr %7)
%11 = call ptr @llvm.coro.promise(ptr null, i32 8, i1 false)
%12 = call ptr @llvm.coro.noop()
%13 = call ptr @llvm.coro.frame()
call void @setValue(ptr null, i64 1)
%14 = call i8 @llvm.coro.suspend(<null operand!>, i1 false)
switch i8 %14, label %suspend [
i8 0, label %suspend
i8 1, label %clean
]
suspend: ; preds = %entry, %entry, %clean
%15 = call i1 @llvm.coro.end(ptr %7, i1 false, token none)
call void @setValue(ptr null, i64 1)
br label %clean
clean: ; preds = %suspend, %entry
%16 = call ptr @llvm.coro.free(token %0, ptr %6)
br label %suspend
_llgo_3: ; No predecessors!
}
; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: read)
declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) #0
; Function Attrs: nounwind memory(none)
declare i32 @llvm.coro.size.i32() #1
; Function Attrs: nounwind memory(none)
declare i64 @llvm.coro.size.i64() #1
; Function Attrs: nounwind memory(none)
declare i32 @llvm.coro.align.i32() #1
; Function Attrs: nounwind memory(none)
declare i64 @llvm.coro.align.i64() #1
; Function Attrs: nounwind
declare i1 @llvm.coro.alloc(token) #2
; Function Attrs: nounwind
declare ptr @llvm.coro.begin(token, ptr writeonly) #2
; Function Attrs: nounwind memory(argmem: read)
declare ptr @llvm.coro.free(token, ptr nocapture readonly) #3
; Function Attrs: nounwind
declare i1 @llvm.coro.end(ptr, i1, token) #2
declare void @llvm.coro.resume(ptr)
; Function Attrs: nounwind memory(argmem: readwrite)
declare i1 @llvm.coro.done(ptr nocapture readonly) #4
declare void @llvm.coro.destroy(ptr)
; Function Attrs: nounwind memory(none)
declare ptr @llvm.coro.promise(ptr nocapture, i32, i1) #1
; Function Attrs: nounwind memory(none)
declare ptr @llvm.coro.noop() #1
; Function Attrs: nounwind memory(none)
declare ptr @llvm.coro.frame() #1
declare void @setValue(i64)
; Function Attrs: nounwind
declare i8 @llvm.coro.suspend(token, i1) #2
attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: read) }
attributes #1 = { nounwind memory(none) }
attributes #2 = { nounwind }
attributes #3 = { nounwind memory(argmem: read) }
attributes #4 = { nounwind memory(argmem: readwrite) }
`)
}