Convert to string

[dequeb]

Hi,

I'm new to llir/llvm. I need a fonction to do type conversion. My first iteration would be to convert from int and float to string. I guess I'll have to call sprintf from the C library. I don't want to allocate global variables to do so. I saw that entry.malloc to allocate temporary variables. That's pretty much where I am. May I ask if someone could give me some cues on how to proceed?
I tried this, but I return an *ir.InstGetElementPtr:

func convertToString(ctx *Context, v value.Value) *ir.InstGetElementPtr {
	// convenient constants
	i32 := types.I32
	i8 := types.I8
	i8x50 := types.NewArray(50, i8)
	zero := constant.NewInt(i32, 0)

	//  buffer
	tmp1 := ctx.Block.NewAlloca(i32)
	ctx.Block.NewStore(zero, tmp1)
	tmp3 := compileStringConstant(ctx, "%d\x00", "")
	// convert float to string
	tmp4 := ctx.Block.NewGetElementPtr(i8x50, zero, zero)
	sprintf := ctx.lookupFunction("sprintf")
	ctx.Block.NewCall(sprintf, tmp4, tmp3, v)
	return tmp4
}

I still don't know how to use this value to send it to another function like print.

Here is my calling function:

// compilePrintStmt compiles a print statement.
func compilePrintStmt(ctx *Context, node *ast.SpecialStmt) {
	zero := constant.NewInt(types.I64, 0)
	printf := ctx.lookupFunction("printf")
	puts := ctx.lookupFunction("puts")
	var value *ir.Global
	var str *ir.InstGetElementPtr
	for _, arg := range node.Args {
		switch arg := arg.(type) {
		case *ast.BasicLit:
			switch arg.Kind {
			case token.StringLit:
				value = compileConstant(ctx, arg, "")
			case token.LongLit:
				str = convertToString(ctx, value)
			default:
				panic("unknown basic literal")
			}
		case *ast.Identifier:
			// TODO: generalize for any type of identifier, not only global constant
			value = ctx.lookupConstant(arg.Name)
		}
		typ := value.Typ.ElemType
		gep := constant.NewGetElementPtr(typ, value, zero, zero)
		// TODO: type conversion to string
		ctx.Block.NewCall(printf, gep)
	}
	if node.Semicolon == nil {
		value = ctx.lookupConstant("vbEmpty")
		typ := value.Typ.ElemType
		gep := constant.NewGetElementPtr(typ, value, zero, zero)
		ctx.Block.NewCall(puts, gep)
	}

[dequeb]

I will proceed differently.