#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*/ assert(int);
int signum(int);
void test_signum() {
  assert(signum(-100) == -1);
  assert(signum(-1) == -1);
  assert(signum(0) == 0);
  assert(signum(1) == 1);
  assert(signum(42) == 1);
}


x86 assembly (clang, -O0):
<test_signum>:
push   %rbp
mov    %rsp,%rbp
mov    $0xffffff9c,%edi
call   1040 <signum@plt>
cmp    $0xffffffff,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
mov    $0xffffffff,%edi
call   1040 <signum@plt>
cmp    $0xffffffff,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
xor    %edi,%edi
call   1040 <signum@plt>
cmp    $0x0,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
mov    $0x1,%edi
call   1040 <signum@plt>
cmp    $0x1,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
mov    $0x2a,%edi
call   1040 <signum@plt>
cmp    $0x1,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
pop    %rbp
ret

x86 assembly (clang, -O2):
<test_signum>:
push   %rax
mov    $0xffffff9c,%edi
call   1040 <signum@plt>
xor    %edi,%edi
cmp    $0xffffffff,%eax
sete   %dil
call   1030 <assert@plt>
mov    $0xffffffff,%edi
call   1040 <signum@plt>
xor    %edi,%edi
cmp    $0xffffffff,%eax
sete   %dil
call   1030 <assert@plt>
xor    %edi,%edi
call   1040 <signum@plt>
xor    %edi,%edi
test   %eax,%eax
sete   %dil
call   1030 <assert@plt>
mov    $0x1,%edi
call   1040 <signum@plt>
xor    %edi,%edi
cmp    $0x1,%eax
sete   %dil
call   1030 <assert@plt>
mov    $0x2a,%edi
call   1040 <signum@plt>
xor    %edi,%edi
cmp    $0x1,%eax
sete   %dil
pop    %rax
jmp    1030 <assert@plt>

LLVM IR (-O0):
define void @test_signum() {
%1 = call i32 @signum(i32 -100)
%2 = icmp eq i32 %1, -1
%3 = zext i1 %2 to i32
%4 = call i32 @assert(i32 %3)
%5 = call i32 @signum(i32 -1)
%6 = icmp eq i32 %5, -1
%7 = zext i1 %6 to i32
%8 = call i32 @assert(i32 %7)
%9 = call i32 @signum(i32 0)
%10 = icmp eq i32 %9, 0
%11 = zext i1 %10 to i32
%12 = call i32 @assert(i32 %11)
%13 = call i32 @signum(i32 1)
%14 = icmp eq i32 %13, 1
%15 = zext i1 %14 to i32
%16 = call i32 @assert(i32 %15)
%17 = call i32 @signum(i32 42)
%18 = icmp eq i32 %17, 1
%19 = zext i1 %18 to i32
%20 = call i32 @assert(i32 %19)
ret void
}

LLVM IR (-O2):
define void @test_signum() {
%1 = tail call i32 @signum(i32 -100)
%2 = icmp eq i32 %1, -1
%3 = zext i1 %2 to i32
%4 = tail call i32 @assert(i32 %3)
%5 = tail call i32 @signum(i32 -1)
%6 = icmp eq i32 %5, -1
%7 = zext i1 %6 to i32
%8 = tail call i32 @assert(i32 %7)
%9 = tail call i32 @signum(i32 0)
%10 = icmp eq i32 %9, 0
%11 = zext i1 %10 to i32
%12 = tail call i32 @assert(i32 %11)
%13 = tail call i32 @signum(i32 1)
%14 = icmp eq i32 %13, 1
%15 = zext i1 %14 to i32
%16 = tail call i32 @assert(i32 %15)
%17 = tail call i32 @signum(i32 42)
%18 = icmp eq i32 %17, 1
%19 = zext i1 %18 to i32
%20 = tail call i32 @assert(i32 %19)
ret void
}