#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 */
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, float *, float *);
int main(void) {
  float a, b, c;
  printf("Please enter two numbers, whom differ by more than 7 significant "
         "digits: ");
  scanf("%f%f", &a, &b);
  c = a + b;
  printf("The sum of %f and %f is %f\n", a, b, c);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf06(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1040 <scanf@plt>
movss  -0x8(%rbp),%xmm0
addss  -0xc(%rbp),%xmm0
movss  %xmm0,-0x10(%rbp)
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0xc(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
movss  -0x10(%rbp),%xmm2
cvtss2sd %xmm2,%xmm2
lea    0xecd(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xf14(%rip),%rdi
lea    0x4(%rsp),%rsi
mov    %rsp,%rdx
call   1040 <scanf@plt>
movss  0x4(%rsp),%xmm2
movss  (%rsp),%xmm1
cvtss2sd %xmm2,%xmm0
addss  %xmm1,%xmm2
cvtss2sd %xmm1,%xmm1
cvtss2sd %xmm2,%xmm2
lea    0xeea(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [74 x i8] c"Please enter two numbers, whom differ by more than 7 significant digits: \00"
@.str.1 = [5 x i8] c"%f%f\00"
@.str.2 = [28 x i8] c"The sum of %f and %f is %f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca float
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([74 x i8], [74 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), float* %2, float* %3)
%7 = load float, float* %2
%8 = load float, float* %3
%9 = fadd float %7, %8
store float %9, float* %4
%10 = load float, float* %2
%11 = fpext float %10 to double
%12 = load float, float* %3
%13 = fpext float %12 to double
%14 = load float, float* %4
%15 = fpext float %14 to double
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.2, i64 0, i64 0), double %11, double %13, double %15)
ret i32 0
}

LLVM IR (-O2):
@.str = [74 x i8] c"Please enter two numbers, whom differ by more than 7 significant digits: \00"
@.str.1 = [5 x i8] c"%f%f\00"
@.str.2 = [28 x i8] c"The sum of %f and %f is %f\0A\00"
define i32 @main() {
%1 = alloca float
%2 = alloca float
%3 = bitcast float* %1 to i8*
%4 = bitcast float* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([74 x i8], [74 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), float* %1, float* %2)
%7 = load float, float* %1
%8 = load float, float* %2
%9 = fadd float %7, %8
%10 = fpext float %7 to double
%11 = fpext float %8 to double
%12 = fpext float %9 to double
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @.str.2, i64 0, i64 0), double %10, double %11, double %12)
ret i32 0
}