#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 pow(double, double);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, double *);
int main(void) {
  double a;
  double x;
  double result;
  printf("a: ");
  scanf("%lf", &a);
  printf("x: ");
  scanf("%lf", &x);
  result = pow(a, x);
  printf("pow(%lf, %lf) = %lf\n", a, x, result);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb0(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xea4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe92(%rip),%rdi
lea    -0x18(%rbp),%rsi
call   1040 <scanf@plt>
movsd  -0x10(%rbp),%xmm0
movsd  -0x18(%rbp),%xmm1
call   1050 <pow@plt>
movsd  %xmm0,-0x20(%rbp)
movsd  -0x10(%rbp),%xmm0
movsd  -0x18(%rbp),%xmm1
movsd  -0x20(%rbp),%xmm2
lea    0xe67(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xec4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeba(%rip),%rbx
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0xeaa(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rsp,%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
movsd  0x8(%rsp),%xmm0
movsd  (%rsp),%xmm1
call   1050 <pow@plt>
movaps %xmm0,%xmm2
movsd  0x8(%rsp),%xmm0
movsd  (%rsp),%xmm1
lea    0xe77(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"a: \00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [4 x i8] c"x: \00"
@.str.3 = [21 x i8] c"pow(%lf, %lf) = %lf\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 ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %2)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %3)
%9 = load double, double* %2
%10 = load double, double* %3
%11 = call double @pow(double %9, double %10)
store double %11, double* %4
%12 = load double, double* %2
%13 = load double, double* %3
%14 = load double, double* %4
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.3, i64 0, i64 0), double %12, double %13, double %14)
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"a: \00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [4 x i8] c"x: \00"
@.str.3 = [21 x i8] c"pow(%lf, %lf) = %lf\0A\00"
define i32 @main() {
%1 = alloca double
%2 = alloca double
%3 = bitcast double* %1 to i8*
%4 = bitcast double* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %1)
%7 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %2)
%9 = load double, double* %1
%10 = load double, double* %2
%11 = call double @pow(double %9, double %10)
%12 = load double, double* %1
%13 = load double, double* %2
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.3, i64 0, i64 0), double %12, double %13, double %11)
ret i32 0
}