#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
double average(double, double);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, double *, double *, double *);
int main(void) {
  double x, y, z;
  printf("Enter three numbers: ");
  scanf("%lf%lf%lf", &x, &y, &z);
  printf("Average of %g and %g: %g\n", x, y, average(x, y));
  printf("Average of %g and %g: %g\n", y, z, average(y, z));
  printf("Average of %g and %g: %g\n", x, z, average(x, z));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x50,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec2(%rip),%rdi
lea    -0x10(%rbp),%rsi
lea    -0x18(%rbp),%rdx
lea    -0x20(%rbp),%rcx
call   1050 <scanf@plt>
movsd  -0x10(%rbp),%xmm0
movsd  %xmm0,-0x48(%rbp)
movsd  -0x18(%rbp),%xmm0
movsd  %xmm0,-0x50(%rbp)
movsd  -0x10(%rbp),%xmm0
movsd  -0x18(%rbp),%xmm1
call   1040 <average@plt>
movsd  -0x50(%rbp),%xmm1
movaps %xmm0,%xmm2
movsd  -0x48(%rbp),%xmm0
lea    0xe84(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
movsd  -0x18(%rbp),%xmm0
movsd  %xmm0,-0x38(%rbp)
movsd  -0x20(%rbp),%xmm0
movsd  %xmm0,-0x40(%rbp)
movsd  -0x18(%rbp),%xmm0
movsd  -0x20(%rbp),%xmm1
call   1040 <average@plt>
movsd  -0x40(%rbp),%xmm1
movaps %xmm0,%xmm2
movsd  -0x38(%rbp),%xmm0
lea    0xe46(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
movsd  -0x10(%rbp),%xmm0
movsd  %xmm0,-0x28(%rbp)
movsd  -0x20(%rbp),%xmm0
movsd  %xmm0,-0x30(%rbp)
movsd  -0x10(%rbp),%xmm0
movsd  -0x20(%rbp),%xmm1
call   1040 <average@plt>
movsd  -0x30(%rbp),%xmm1
movaps %xmm0,%xmm2
movsd  -0x28(%rbp),%xmm0
lea    0xe08(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x50,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x30,%rsp
lea    0xec4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xecc(%rip),%rdi
lea    0x28(%rsp),%rsi
lea    0x20(%rsp),%rdx
lea    0x18(%rsp),%rcx
call   1050 <scanf@plt>
movsd  0x28(%rsp),%xmm0
movsd  %xmm0,0x10(%rsp)
movsd  0x20(%rsp),%xmm1
movsd  %xmm1,0x8(%rsp)
call   1040 <average@plt>
movaps %xmm0,%xmm2
lea    0xe9b(%rip),%rbx
mov    %rbx,%rdi
movsd  0x10(%rsp),%xmm0
movsd  0x8(%rsp),%xmm1
mov    $0x3,%al
call   1030 <printf@plt>
movsd  0x20(%rsp),%xmm0
movsd  %xmm0,0x10(%rsp)
movsd  0x18(%rsp),%xmm1
movsd  %xmm1,0x8(%rsp)
call   1040 <average@plt>
movaps %xmm0,%xmm2
mov    %rbx,%rdi
movsd  0x10(%rsp),%xmm0
movsd  0x8(%rsp),%xmm1
mov    $0x3,%al
call   1030 <printf@plt>
movsd  0x28(%rsp),%xmm0
movsd  %xmm0,0x10(%rsp)
movsd  0x18(%rsp),%xmm1
movsd  %xmm1,0x8(%rsp)
call   1040 <average@plt>
movaps %xmm0,%xmm2
mov    %rbx,%rdi
movsd  0x10(%rsp),%xmm0
movsd  0x8(%rsp),%xmm1
mov    $0x3,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [22 x i8] c"Enter three numbers: \00"
@.str.1 = [10 x i8] c"%lf%lf%lf\00"
@.str.2 = [26 x i8] c"Average of %g and %g: %g\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca double
%3 = alloca double
%4 = alloca double
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), double* %2, double* %3, double* %4)
%7 = load double, double* %2
%8 = load double, double* %3
%9 = load double, double* %2
%10 = load double, double* %3
%11 = call double @average(double %9, double %10)
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0), double %7, double %8, double %11)
%13 = load double, double* %3
%14 = load double, double* %4
%15 = load double, double* %3
%16 = load double, double* %4
%17 = call double @average(double %15, double %16)
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0), double %13, double %14, double %17)
%19 = load double, double* %2
%20 = load double, double* %4
%21 = load double, double* %2
%22 = load double, double* %4
%23 = call double @average(double %21, double %22)
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0), double %19, double %20, double %23)
ret i32 0
}

LLVM IR (-O2):
@.str = [22 x i8] c"Enter three numbers: \00"
@.str.1 = [10 x i8] c"%lf%lf%lf\00"
@.str.2 = [26 x i8] c"Average of %g and %g: %g\0A\00"
define i32 @main() {
%1 = alloca double
%2 = alloca double
%3 = alloca double
%4 = bitcast double* %1 to i8*
%5 = bitcast double* %2 to i8*
%6 = bitcast double* %3 to i8*
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), double* %1, double* %2, double* %3)
%9 = load double, double* %1
%10 = load double, double* %2
%11 = call double @average(double %9, double %10)
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0), double %9, double %10, double %11)
%13 = load double, double* %2
%14 = load double, double* %3
%15 = call double @average(double %13, double %14)
%16 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0), double %13, double %14, double %15)
%17 = load double, double* %1
%18 = load double, double* %3
%19 = call double @average(double %17, double %18)
%20 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0), double %17, double %18, double %19)
ret i32 0
}