#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 */
scalar_t__ strcmp(char *, char *);
int is_oper(char *string) {
  int result = (strcmp("+", string) == 0 || strcmp("++", string) == 0 ||
                strcmp("-", string) == 0 || strcmp("/", string) == 0 ||
                strcmp("*", string) == 0 || strcmp("!", string) == 0 ||
                strcmp("%", string) == 0);
  return result;
}


x86 assembly (clang, -O0):
<is_oper>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rsi
lea    0xeda(%rip),%rdi
call   1030 <strcmp@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0xd(%rbp)
je     1202 <is_oper+0xf2>
mov    -0x8(%rbp),%rsi
lea    0xeb7(%rip),%rdi
call   1030 <strcmp@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0xd(%rbp)
je     1202 <is_oper+0xf2>
mov    -0x8(%rbp),%rsi
lea    0xe98(%rip),%rdi
call   1030 <strcmp@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0xd(%rbp)
je     1202 <is_oper+0xf2>
mov    -0x8(%rbp),%rsi
lea    0xe78(%rip),%rdi
call   1030 <strcmp@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0xd(%rbp)
je     1202 <is_oper+0xf2>
mov    -0x8(%rbp),%rsi
lea    0xe58(%rip),%rdi
call   1030 <strcmp@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0xd(%rbp)
je     1202 <is_oper+0xf2>
mov    -0x8(%rbp),%rsi
lea    0xe38(%rip),%rdi
call   1030 <strcmp@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0xd(%rbp)
je     1202 <is_oper+0xf2>
mov    -0x8(%rbp),%rsi
lea    0xe18(%rip),%rdi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
sete   %al
mov    %al,-0xd(%rbp)
mov    -0xd(%rbp),%al
and    $0x1,%al
movzbl %al,%eax
mov    %eax,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<is_oper>:
push   %rbp
push   %rbx
push   %rax
mov    %rdi,%rbx
lea    0xee4(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
mov    $0x1,%ebp
test   %rax,%rax
je     11ab <is_oper+0x9b>
lea    0xeca(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11ab <is_oper+0x9b>
lea    0xeb9(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11ab <is_oper+0x9b>
lea    0xea7(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11ab <is_oper+0x9b>
lea    0xe95(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11ab <is_oper+0x9b>
lea    0xe83(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11ab <is_oper+0x9b>
lea    0xe71(%rip),%rdi
mov    %rbx,%rsi
call   1030 <strcmp@plt>
xor    %ebp,%ebp
test   %rax,%rax
sete   %bpl
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [2 x i8] c"+\00"
@.str.1 = [3 x i8] c"++\00"
@.str.2 = [2 x i8] c"-\00"
@.str.3 = [2 x i8] c"/\00"
@.str.4 = [2 x i8] c"*\00"
@.str.5 = [2 x i8] c"!\00"
@.str.6 = [2 x i8] c"%\00"
define i32 @is_oper(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0), i8* %4)
%6 = icmp eq i64 %5, 0
br i1 %6, label %31, label %7
7: ; preds = %1
%8 = load i8*, i8** %2
%9 = call i64 @strcmp(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %8)
%10 = icmp eq i64 %9, 0
br i1 %10, label %31, label %11
11: ; preds = %7
%12 = load i8*, i8** %2
%13 = call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0), i8* %12)
%14 = icmp eq i64 %13, 0
br i1 %14, label %31, label %15
15: ; preds = %11
%16 = load i8*, i8** %2
%17 = call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0), i8* %16)
%18 = icmp eq i64 %17, 0
br i1 %18, label %31, label %19
19: ; preds = %15
%20 = load i8*, i8** %2
%21 = call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0), i8* %20)
%22 = icmp eq i64 %21, 0
br i1 %22, label %31, label %23
23: ; preds = %19
%24 = load i8*, i8** %2
%25 = call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0), i8* %24)
%26 = icmp eq i64 %25, 0
br i1 %26, label %31, label %27
27: ; preds = %23
%28 = load i8*, i8** %2
%29 = call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.6, i64 0, i64 0), i8* %28)
%30 = icmp eq i64 %29, 0
br label %31
31: ; preds = %27, %23, %19, %15, %11, %7, %1
%32 = phi i1 [ true, %23 ], [ true, %19 ], [ true, %15 ], [ true, %11 ], [ true, %7 ], [ true, %1 ], [ %30, %27 ]
%33 = zext i1 %32 to i32
store i32 %33, i32* %3
%34 = load i32, i32* %3
ret i32 %34
}

LLVM IR (-O2):
@.str = [2 x i8] c"+\00"
@.str.1 = [3 x i8] c"++\00"
@.str.2 = [2 x i8] c"-\00"
@.str.3 = [2 x i8] c"/\00"
@.str.4 = [2 x i8] c"*\00"
@.str.5 = [2 x i8] c"!\00"
@.str.6 = [2 x i8] c"%\00"
define i32 @is_oper(i8* %0) {
%2 = tail call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0), i8* %0)
%3 = icmp eq i64 %2, 0
br i1 %3, label %23, label %4
4: ; preds = %1
%5 = tail call i64 @strcmp(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %0)
%6 = icmp eq i64 %5, 0
br i1 %6, label %23, label %7
7: ; preds = %4
%8 = tail call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0), i8* %0)
%9 = icmp eq i64 %8, 0
br i1 %9, label %23, label %10
10: ; preds = %7
%11 = tail call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0), i8* %0)
%12 = icmp eq i64 %11, 0
br i1 %12, label %23, label %13
13: ; preds = %10
%14 = tail call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0), i8* %0)
%15 = icmp eq i64 %14, 0
br i1 %15, label %23, label %16
16: ; preds = %13
%17 = tail call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0), i8* %0)
%18 = icmp eq i64 %17, 0
br i1 %18, label %23, label %19
19: ; preds = %16
%20 = tail call i64 @strcmp(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.6, i64 0, i64 0), i8* %0)
%21 = icmp eq i64 %20, 0
%22 = zext i1 %21 to i32
br label %23
23: ; preds = %19, %16, %13, %10, %7, %4, %1
%24 = phi i32 [ 1, %16 ], [ 1, %13 ], [ 1, %10 ], [ 1, %7 ], [ 1, %4 ], [ 1, %1 ], [ %22, %19 ]
ret i32 %24
}