#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 *);
int main() {
  float a;
  scanf("%f", &a);
  if (a < 0.0)
    printf("%.4f is negative\n", a);
  if (a == 0.0)
    printf("input is zero");
  if (a > 0.0)
    printf("%.4f is positive\n", a);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm1
xorps  %xmm0,%xmm0
ucomisd %xmm1,%xmm0
jbe    116c <main+0x4c>
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
lea    0xe9e(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
xorps  %xmm1,%xmm1
ucomisd %xmm1,%xmm0
jne    1196 <main+0x76>
jp     1196 <main+0x76>
lea    0xe86(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
xorps  %xmm1,%xmm1
ucomisd %xmm1,%xmm0
jbe    11c3 <main+0xa3>
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
lea    0xe67(%rip),%rdi
mov    $0x1,%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
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
movss  0x4(%rsp),%xmm0
xorps  %xmm1,%xmm1
ucomiss %xmm0,%xmm1
jbe    115b <main+0x3b>
cvtss2sd %xmm0,%xmm0
lea    0xeb8(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
xorps  %xmm1,%xmm1
movss  0x4(%rsp),%xmm0
ucomiss %xmm1,%xmm0
jne    1176 <main+0x56>
jp     1176 <main+0x56>
lea    0xeac(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
movss  0x4(%rsp),%xmm0
xorps  %xmm1,%xmm1
ucomiss %xmm1,%xmm0
jbe    1190 <main+0x70>
cvtss2sd %xmm0,%xmm0
lea    0xe9a(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%f\00"
@.str.1 = [18 x i8] c"%.4f is negative\0A\00"
@.str.2 = [14 x i8] c"input is zero\00"
@.str.3 = [18 x i8] c"%.4f is positive\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
store i32 0, i32* %1
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), float* %2)
%4 = load float, float* %2
%5 = fpext float %4 to double
%6 = fcmp olt double %5, 0.000000e+00
br i1 %6, label %7, label %11
7: ; preds = %0
%8 = load float, float* %2
%9 = fpext float %8 to double
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), double %9)
br label %11
11: ; preds = %7, %0
%12 = load float, float* %2
%13 = fpext float %12 to double
%14 = fcmp oeq double %13, 0.000000e+00
br i1 %14, label %15, label %17
15: ; preds = %11
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0))
br label %17
17: ; preds = %15, %11
%18 = load float, float* %2
%19 = fpext float %18 to double
%20 = fcmp ogt double %19, 0.000000e+00
br i1 %20, label %21, label %25
21: ; preds = %17
%22 = load float, float* %2
%23 = fpext float %22 to double
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.3, i64 0, i64 0), double %23)
br label %25
25: ; preds = %21, %17
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%f\00"
@.str.1 = [18 x i8] c"%.4f is negative\0A\00"
@.str.2 = [14 x i8] c"input is zero\00"
@.str.3 = [18 x i8] c"%.4f is positive\0A\00"
define i32 @main() {
%1 = alloca float
%2 = bitcast float* %1 to i8*
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), float* %1)
%4 = load float, float* %1
%5 = fcmp olt float %4, 0.000000e+00
br i1 %5, label %6, label %10
6: ; preds = %0
%7 = fpext float %4 to double
%8 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), double %7)
%9 = load float, float* %1
br label %10
10: ; preds = %6, %0
%11 = phi float [ %9, %6 ], [ %4, %0 ]
%12 = fcmp oeq float %11, 0.000000e+00
br i1 %12, label %13, label %16
13: ; preds = %10
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0))
%15 = load float, float* %1
br label %16
16: ; preds = %13, %10
%17 = phi float [ %15, %13 ], [ %11, %10 ]
%18 = fcmp ogt float %17, 0.000000e+00
br i1 %18, label %19, label %22
19: ; preds = %16
%20 = fpext float %17 to double
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.3, i64 0, i64 0), double %20)
br label %22
22: ; preds = %19, %16
ret i32 0
}