runtime.ll

@dnl = internal constant [4 x i8] c"%d\0A\00"
@fnl = internal constant [6 x i8] c"%.1f\0A\00"
@d   = internal constant [3 x i8] c"%d\00"
@lf  = internal constant [4 x i8] c"%lf\00"

declare i32 @printf(i8*, ...)
declare i32 @scanf(i8*, ...)
declare i32 @puts(i8*)

define void @printInt(i32 %x) {
entry: %t0 = getelementptr [4 x i8], [4 x i8]* @dnl, i32 0, i32 0
	call i32 (i8*, ...) @printf(i8* %t0, i32 %x)
	ret void
}

define void @printDouble(double %x) {
entry: %t0 = getelementptr [6 x i8], [6 x i8]* @fnl, i32 0, i32 0
	call i32 (i8*, ...) @printf(i8* %t0, double %x)
	ret void
}

define void @printString(i8* %s) {
entry:  call i32 @puts(i8* %s)
	ret void
}

define i32 @readInt() {
entry:	%res = alloca i32
        %t1 = getelementptr [3 x i8], [3 x i8]* @d, i32 0, i32 0
	call i32 (i8*, ...) @scanf(i8* %t1, i32* %res)
	%t2 = load i32, i32* %res
	ret i32 %t2
}

define double @readDouble() {
entry:	%res = alloca double
        %t1 = getelementptr [4 x i8], [4 x i8]* @lf, i32 0, i32 0
	call i32 (i8*, ...) @scanf(i8* %t1, double* %res)
	%t2 = load double, double* %res
	ret double %t2
}