#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__ isspace(char);
int configfile_iscomment(char *buf) {
  char *ch;
  ch = &(buf[0]);
  while (isspace(*ch) && (*ch != '\0'))
    ch++;
  return (*ch == '#');
}


x86 assembly (clang, -O0):
<configfile_iscomment>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
movsbl (%rax),%edi
call   1030 <isspace@plt>
mov    %rax,%rcx
xor    %eax,%eax
cmp    $0x0,%rcx
mov    %al,-0x11(%rbp)
je     1152 <configfile_iscomment+0x42>
mov    -0x10(%rbp),%rax
movsbl (%rax),%eax
cmp    $0x0,%eax
setne  %al
mov    %al,-0x11(%rbp)
mov    -0x11(%rbp),%al
test   $0x1,%al
jne    1162 <configfile_iscomment+0x52>
jmp    1173 <configfile_iscomment+0x63>
mov    -0x10(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x10(%rbp)
jmp    1124 <configfile_iscomment+0x14>
mov    -0x10(%rbp),%rax
movsbl (%rax),%eax
cmp    $0x23,%eax
sete   %al
and    $0x1,%al
movzbl %al,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<configfile_iscomment>:
push   %rbx
mov    %rdi,%rbx
movsbl (%rdi),%edi
nopw   0x0(%rax,%rax,1)
call   1030 <isspace@plt>
test   %rax,%rax
je     1139 <configfile_iscomment+0x29>
cmpb   $0x0,(%rbx)
je     1139 <configfile_iscomment+0x29>
movsbl 0x1(%rbx),%edi
add    $0x1,%rbx
jmp    1120 <configfile_iscomment+0x10>
xor    %eax,%eax
cmpb   $0x23,(%rbx)
sete   %al
pop    %rbx
ret

LLVM IR (-O0):
define i32 @configfile_iscomment(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = getelementptr inbounds i8, i8* %4, i64 0
store i8* %5, i8** %3
br label %6
6: ; preds = %18, %1
%7 = load i8*, i8** %3
%8 = load i8, i8* %7
%9 = call i64 @isspace(i8 signext %8)
%10 = icmp ne i64 %9, 0
br i1 %10, label %11, label %16
11: ; preds = %6
%12 = load i8*, i8** %3
%13 = load i8, i8* %12
%14 = sext i8 %13 to i32
%15 = icmp ne i32 %14, 0
br label %16
16: ; preds = %11, %6
%17 = phi i1 [ false, %6 ], [ %15, %11 ]
br i1 %17, label %18, label %21
18: ; preds = %16
%19 = load i8*, i8** %3
%20 = getelementptr inbounds i8, i8* %19, i32 1
store i8* %20, i8** %3
br label %6
21: ; preds = %16
%22 = load i8*, i8** %3
%23 = load i8, i8* %22
%24 = sext i8 %23 to i32
%25 = icmp eq i32 %24, 35
%26 = zext i1 %25 to i32
ret i32 %26
}

LLVM IR (-O2):
define i32 @configfile_iscomment(i8* nocapture %0) {
%2 = load i8, i8* %0
%3 = tail call i64 @isspace(i8 signext %2)
%4 = icmp eq i64 %3, 0
br i1 %4, label %14, label %5
5: ; preds = %1, %9
%6 = phi i8* [ %10, %9 ], [ %0, %1 ]
%7 = load i8, i8* %6
%8 = icmp eq i8 %7, 0
br i1 %8, label %14, label %9
9: ; preds = %5
%10 = getelementptr inbounds i8, i8* %6, i64 1
%11 = load i8, i8* %10
%12 = tail call i64 @isspace(i8 signext %11)
%13 = icmp eq i64 %12, 0
br i1 %13, label %14, label %5
14: ; preds = %5, %9, %1
%15 = phi i8* [ %0, %1 ], [ %10, %9 ], [ %6, %5 ]
%16 = load i8, i8* %15
%17 = icmp eq i8 %16, 35
%18 = zext i1 %17 to i32
ret i32 %18
}