#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__ is_alpha(char const);
scalar_t__ is_digit(char const);
unsigned char is_channel_id(const char c) {
  return (is_alpha(c) || is_digit(c) || c == 43 || c == 45 || c == 95) ? 1 : 0;
}


x86 assembly (clang, -O0):
<is_channel_id>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %dil,%al
mov    %al,-0x1(%rbp)
movsbl -0x1(%rbp),%edi
call   1040 <is_alpha@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0x2(%rbp)
jne    1195 <is_channel_id+0x75>
movsbl -0x1(%rbp),%edi
call   1030 <is_digit@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0x2(%rbp)
jne    1195 <is_channel_id+0x75>
movsbl -0x1(%rbp),%ecx
mov    $0x1,%al
cmp    $0x2b,%ecx
mov    %al,-0x2(%rbp)
je     1195 <is_channel_id+0x75>
movsbl -0x1(%rbp),%ecx
mov    $0x1,%al
cmp    $0x2d,%ecx
mov    %al,-0x2(%rbp)
je     1195 <is_channel_id+0x75>
movsbl -0x1(%rbp),%eax
cmp    $0x5f,%eax
sete   %al
mov    %al,-0x2(%rbp)
mov    -0x2(%rbp),%dl
xor    %eax,%eax
mov    $0x1,%ecx
test   $0x1,%dl
cmovne %ecx,%eax
movzbl %al,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<is_channel_id>:
push   %rbp
push   %rbx
push   %rax
mov    %edi,%ebp
call   1040 <is_alpha@plt>
mov    $0x1,%bl
test   %rax,%rax
jne    113f <is_channel_id+0x1f>
movsbl %bpl,%edi
call   1030 <is_digit@plt>
test   %rax,%rax
je     1148 <is_channel_id+0x28>
mov    %ebx,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret
cmp    $0x2b,%bpl
je     113f <is_channel_id+0x1f>
cmp    $0x2d,%bpl
je     113f <is_channel_id+0x1f>
cmp    $0x5f,%bpl
sete   %bl
jmp    113f <is_channel_id+0x1f>

LLVM IR (-O0):
define zeroext i8 @is_channel_id(i8 signext %0) {
%2 = alloca i8
store i8 %0, i8* %2
%3 = load i8, i8* %2
%4 = call i64 @is_alpha(i8 signext %3)
%5 = icmp ne i64 %4, 0
br i1 %5, label %22, label %6
6: ; preds = %1
%7 = load i8, i8* %2
%8 = call i64 @is_digit(i8 signext %7)
%9 = icmp ne i64 %8, 0
br i1 %9, label %22, label %10
10: ; preds = %6
%11 = load i8, i8* %2
%12 = sext i8 %11 to i32
%13 = icmp eq i32 %12, 43
br i1 %13, label %22, label %14
14: ; preds = %10
%15 = load i8, i8* %2
%16 = sext i8 %15 to i32
%17 = icmp eq i32 %16, 45
br i1 %17, label %22, label %18
18: ; preds = %14
%19 = load i8, i8* %2
%20 = sext i8 %19 to i32
%21 = icmp eq i32 %20, 95
br label %22
22: ; preds = %18, %14, %10, %6, %1
%23 = phi i1 [ true, %14 ], [ true, %10 ], [ true, %6 ], [ true, %1 ], [ %21, %18 ]
%24 = zext i1 %23 to i64
%25 = select i1 %23, i32 1, i32 0
%26 = trunc i32 %25 to i8
ret i8 %26
}

LLVM IR (-O2):
define zeroext i8 @is_channel_id(i8 signext %0) {
%2 = tail call i64 @is_alpha(i8 signext %0)
%3 = icmp eq i64 %2, 0
br i1 %3, label %4, label %12
4: ; preds = %1
%5 = tail call i64 @is_digit(i8 signext %0)
%6 = freeze i64 %5
%7 = icmp eq i64 %6, 0
br i1 %7, label %8, label %12
8: ; preds = %4
switch i8 %0, label %9 [
i8 45, label %12
i8 43, label %12
]
9: ; preds = %8
%10 = icmp eq i8 %0, 95
%11 = zext i1 %10 to i8
br label %12
12: ; preds = %8, %8, %4, %9, %1
%13 = phi i8 [ 1, %8 ], [ 1, %1 ], [ %11, %9 ], [ 1, %4 ], [ 1, %8 ]
ret i8 %13
}