#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 fabs(float);
int /*<<< orphan*/ printf(char *, float, float, float, float, float);
int /*<<< orphan*/ scanf(char *, float *, float *);
int main() {
  float a, b;
  scanf("%f%f", &a, &b);
  float x = (1.0 / 2.0) * fabs(a) * fabs(b);
  printf("The area of (%.4f,%.4f), (%.4f,0) and (0,%.4f) is %.4f.", a, b, a, b,
         x);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xec2(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1050 <scanf@plt>
movss  -0x8(%rbp),%xmm0
call   1040 <fabs@plt>
movaps %xmm0,%xmm1
movsd  0xe98(%rip),%xmm0
mulsd  %xmm1,%xmm0
movsd  %xmm0,-0x18(%rbp)
movss  -0xc(%rbp),%xmm0
call   1040 <fabs@plt>
movaps %xmm0,%xmm1
movsd  -0x18(%rbp),%xmm0
mulsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0x10(%rbp)
movss  -0x8(%rbp),%xmm0
movss  -0xc(%rbp),%xmm1
movss  -0x8(%rbp),%xmm2
movss  -0xc(%rbp),%xmm3
movss  -0x10(%rbp),%xmm4
lea    0xe5d(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xecd(%rip),%rdi
lea    0xc(%rsp),%rsi
lea    0x8(%rsp),%rdx
call   1050 <scanf@plt>
movss  0xc(%rsp),%xmm0
call   1040 <fabs@plt>
mulsd  0xea3(%rip),%xmm0
movsd  %xmm0,0x10(%rsp)
movss  0x8(%rsp),%xmm0
call   1040 <fabs@plt>
mulsd  0x10(%rsp),%xmm0
cvtsd2ss %xmm0,%xmm4
movss  0xc(%rsp),%xmm0
movss  0x8(%rsp),%xmm1
lea    0xe82(%rip),%rdi
movaps %xmm0,%xmm2
movaps %xmm1,%xmm3
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [5 x i8] c"%f%f\00"
@.str.1 = [56 x i8] c"The area of (%.4f,%.4f), (%.4f,0) and (0,%.4f) is %.4f.\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca float
store i32 0, i32* %1
%5 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), float* %2, float* %3)
%6 = load float, float* %2
%7 = call double @fabs(float %6)
%8 = fmul double 5.000000e-01, %7
%9 = load float, float* %3
%10 = call double @fabs(float %9)
%11 = fmul double %8, %10
%12 = fptrunc double %11 to float
store float %12, float* %4
%13 = load float, float* %2
%14 = load float, float* %3
%15 = load float, float* %2
%16 = load float, float* %3
%17 = load float, float* %4
%18 = call i32 @printf(i8* getelementptr inbounds ([56 x i8], [56 x i8]* @.str.1, i64 0, i64 0), float %13, float %14, float %15, float %16, float %17)
ret i32 0
}

LLVM IR (-O2):
@.str = [5 x i8] c"%f%f\00"
@.str.1 = [56 x i8] c"The area of (%.4f,%.4f), (%.4f,0) and (0,%.4f) is %.4f.\00"
define i32 @main() {
%1 = alloca float
%2 = alloca float
%3 = bitcast float* %1 to i8*
%4 = bitcast float* %2 to i8*
%5 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), float* %1, float* %2)
%6 = load float, float* %1
%7 = call double @fabs(float %6)
%8 = fmul double %7, 5.000000e-01
%9 = load float, float* %2
%10 = call double @fabs(float %9)
%11 = fmul double %8, %10
%12 = fptrunc double %11 to float
%13 = load float, float* %1
%14 = load float, float* %2
%15 = call i32 @printf(i8* getelementptr inbounds ([56 x i8], [56 x i8]* @.str.1, i64 0, i64 0), float %13, float %14, float %13, float %14, float %12)
ret i32 0
}