int is_no(cp)
char *cp;
{
  if (strcmp_tospace(cp, "no") == 0 || strcmp_tospace(cp, "off") == 0 ||
      strcmp_tospace(cp, "false") == 0) {
    return 1;
  }
  return 0;
}


x86 assembly (clang, -O0):
<is_no>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xed9(%rip),%rsi
mov    $0x0,%al
call   1030 <strcmp_tospace@plt>
cmp    $0x0,%eax
je     116d <is_no+0x5d>
mov    -0x10(%rbp),%rdi
lea    0xec1(%rip),%rsi
mov    $0x0,%al
call   1030 <strcmp_tospace@plt>
cmp    $0x0,%eax
je     116d <is_no+0x5d>
mov    -0x10(%rbp),%rdi
lea    0xeaa(%rip),%rsi
mov    $0x0,%al
call   1030 <strcmp_tospace@plt>
cmp    $0x0,%eax
jne    1179 <is_no+0x69>
movl   $0x1,-0x4(%rbp)
jmp    1180 <is_no+0x70>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<is_no>:
push   %rbp
push   %rbx
push   %rax
mov    %rdi,%rbx
lea    0xee3(%rip),%rsi
xor    %eax,%eax
call   1030 <strcmp_tospace@plt>
mov    $0x1,%ebp
test   %eax,%eax
je     115b <is_no+0x4b>
lea    0xecf(%rip),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1030 <strcmp_tospace@plt>
test   %eax,%eax
je     115b <is_no+0x4b>
lea    0xebe(%rip),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1030 <strcmp_tospace@plt>
xor    %ebp,%ebp
test   %eax,%eax
sete   %bpl
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"no\00"
@.str.1 = [4 x i8] c"off\00"
@.str.2 = [6 x i8] c"false\00"
define i32 @is_no(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i32 (i8*, i8*, ...) bitcast (i32 (...)* @strcmp_tospace to i32 (i8*, i8*, ...)*)(i8* %4, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%6 = icmp eq i32 %5, 0
br i1 %6, label %15, label %7
7: ; preds = %1
%8 = load i8*, i8** %3
%9 = call i32 (i8*, i8*, ...) bitcast (i32 (...)* @strcmp_tospace to i32 (i8*, i8*, ...)*)(i8* %8, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
%10 = icmp eq i32 %9, 0
br i1 %10, label %15, label %11
11: ; preds = %7
%12 = load i8*, i8** %3
%13 = call i32 (i8*, i8*, ...) bitcast (i32 (...)* @strcmp_tospace to i32 (i8*, i8*, ...)*)(i8* %12, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0))
%14 = icmp eq i32 %13, 0
br i1 %14, label %15, label %16
15: ; preds = %11, %7, %1
store i32 1, i32* %2
br label %17
16: ; preds = %11
store i32 0, i32* %2
br label %17
17: ; preds = %16, %15
%18 = load i32, i32* %2
ret i32 %18
}

LLVM IR (-O2):
@.str = [3 x i8] c"no\00"
@.str.1 = [4 x i8] c"off\00"
@.str.2 = [6 x i8] c"false\00"
define i32 @is_no(i8* %0) {
%2 = tail call i32 (i8*, i8*, ...) bitcast (i32 (...)* @strcmp_tospace to i32 (i8*, i8*, ...)*)(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32 %2, 0
br i1 %3, label %11, label %4
4: ; preds = %1
%5 = tail call i32 (i8*, i8*, ...) bitcast (i32 (...)* @strcmp_tospace to i32 (i8*, i8*, ...)*)(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
%6 = icmp eq i32 %5, 0
br i1 %6, label %11, label %7
7: ; preds = %4
%8 = tail call i32 (i8*, i8*, ...) bitcast (i32 (...)* @strcmp_tospace to i32 (i8*, i8*, ...)*)(i8* %0, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0))
%9 = icmp eq i32 %8, 0
%10 = zext i1 %9 to i32
br label %11
11: ; preds = %7, %1, %4
%12 = phi i32 [ 1, %4 ], [ 1, %1 ], [ %10, %7 ]
ret i32 %12
}