declare i32 @putchar(i32)

define void @putstr(i8* %a) {
    %first = load i8, i8* %a
    %cond = icmp eq i8 %first, 0
    br i1 %cond, label %IfZero, label  %IfNotZero
    IfNotZero:
    %char = zext i8 %first to i32
    call i32 @putchar(i32 %char)
    %next = getelementptr i8, i8* %a, i8 1
    call void @putstr(i8* %next)
    ret void
    IfZero:
    ret void
}

define void @main() {
    %array = alloca [7 x i8]
    store [7 x i8] c"hello\0A\00", [7 x i8]* %array
    %arr = bitcast [7 x i8]* %array to i8*
    call void @putstr(i8* %arr)
    ret void
}