func main() {
flag.Parse()
if flag.NArg() < 1 {
println("USAGE: brainfuck <program file>")
return
}
codeFile := flag.Arg(0)
source, err := os.Open(codeFile)
if err != nil {
panic(err)
}
defer source.Close()
parser := new(Parser)
parser.Source = bufio.NewReader(source)
println("Parsing...")
if err := parser.Parse(); err != nil {
panic(err)
}
println("Building...")
bundle, err := parser.BuildBundle()
if err != nil {
panic(err)
}
println("Generating code...")
mod := ir.NewModule("mod")
builder := ir.NewBuilder()
mainFnType := ir.NewFunctionType([]ir.Type{}, ir.NewIntType(32), false)
mainFn := mod.AddFunction("main", mainFnType)
entry := mainFn.AddBlockAtStart("entry")
builder.SetInsertAtBlockStart(entry)
bundle.Codegen(builder)
_ = x86.NewTarget(platform.Linux)
}
func makeMod() *ir.Module {
mod := ir.NewModule("mod")
builder := ir.NewBuilder()
/*ity := ir.NewIntType(32)
mainFnType := ir.NewFunctionType([]ir.Type{ity}, ity, false)
mainFn := mod.AddFunction("main", mainFnType)
mainFn.Parameters()[0].SetName("thing")
exFnType := ir.NewFunctionType([]ir.Type{ity}, ity, false)
exFn := mod.AddFunction("ex", exFnType)
exEntryblock := exFn.AddBlockAtEnd("entry")
builder.SetInsertAtBlockEnd(exEntryblock)
add := builder.CreateAdd("test", exFn.Parameters()[0], ir.NewIntLit(ity, 9))
sub := builder.CreateSub("sub", add, ir.NewIntLit(ity, 3))
mul := builder.CreateMul("mul", sub, ir.NewIntLit(ity, 3))
rem := builder.CreateURem("rem", mul, ir.NewIntLit(ity, 4))
exNextBlock := exFn.AddBlockAtEnd("next")
builder.CreateBr(exNextBlock)
builder.SetInsertAtBlockStart(exNextBlock)
builder.CreateRet(rem)
entryBlock := mainFn.AddBlockAtEnd("entry")
builder.SetInsertAtBlockEnd(entryBlock)
call := builder.CreateCall("call", exFn, ir.NewIntLit(ity, 1))
builder.CreateRet(call)*/
retType := ir.NewIntType(32)
mainFnType := ir.NewFunctionType([]ir.Type{ir.NewIntType(32)}, retType, false)
mainFn := mod.AddFunction("main", mainFnType)
entry := mainFn.AddBlockAtStart("entry")
builder.SetInsertAtBlockStart(entry)
//builder.CreateRet(ir.NewIntLit(ir.NewIntType(1), 1))
trueBlock := mainFn.AddBlockAtEnd("true")
falseBlock := mainFn.AddBlockAtEnd("false")
icmp := builder.CreateICmp("icmp", ir.IntSLT, ir.NewIntLit(ir.NewIntType(32), 10), ir.NewIntLit(ir.NewIntType(32), 10))
builder.CreateBrif(icmp, trueBlock, falseBlock)
builder.SetInsertAtBlockStart(trueBlock)
builder.CreateRet(ir.NewIntLit(retType, 20))
builder.SetInsertAtBlockStart(falseBlock)
builder.CreateRet(ir.NewIntLit(retType, 10))
fmt.Print(mod.String())
err := mod.Validate()
if err != nil {
fmt.Println("\n\nError:", err)
os.Exit(1)
}
return mod
}