#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*/ strcasecmp(char const *, char *);
char is_true(const char *value) {
  if (!strcasecmp(value, "true") || !strcasecmp(value, "on") ||
      !strcasecmp(value, "1"))
    return 1;
  return 0;
}


x86 assembly (clang, -O0):
<is_true>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xed9(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%eax
je     1167 <is_true+0x57>
mov    -0x10(%rbp),%rdi
lea    0xec5(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%eax
je     1167 <is_true+0x57>
mov    -0x10(%rbp),%rdi
lea    0xeaf(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%eax
jne    1170 <is_true+0x60>
movb   $0x1,-0x1(%rbp)
jmp    1174 <is_true+0x64>
movb   $0x0,-0x1(%rbp)
movsbl -0x1(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<is_true>:
push   %rbp
push   %rbx
push   %rax
mov    %rdi,%rbx
lea    0xee3(%rip),%rsi
call   1030 <strcasecmp@plt>
mov    $0x1,%bpl
test   %eax,%eax
je     1151 <is_true+0x41>
lea    0xed5(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
test   %eax,%eax
je     1151 <is_true+0x41>
lea    0xec5(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
test   %eax,%eax
sete   %bpl
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [5 x i8] c"true\00"
@.str.1 = [3 x i8] c"on\00"
@.str.2 = [2 x i8] c"1\00"
define signext i8 @is_true(i8* %0) {
%2 = alloca i8
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i32 @strcasecmp(i8* %4, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
%6 = icmp ne i32 %5, 0
br i1 %6, label %7, label %15
7: ; preds = %1
%8 = load i8*, i8** %3
%9 = call i32 @strcasecmp(i8* %8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%10 = icmp ne i32 %9, 0
br i1 %10, label %11, label %15
11: ; preds = %7
%12 = load i8*, i8** %3
%13 = call i32 @strcasecmp(i8* %12, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%14 = icmp ne i32 %13, 0
br i1 %14, label %16, label %15
15: ; preds = %11, %7, %1
store i8 1, i8* %2
br label %17
16: ; preds = %11
store i8 0, i8* %2
br label %17
17: ; preds = %16, %15
%18 = load i8, i8* %2
ret i8 %18
}

LLVM IR (-O2):
@.str = [5 x i8] c"true\00"
@.str.1 = [3 x i8] c"on\00"
@.str.2 = [2 x i8] c"1\00"
define signext i8 @is_true(i8* nocapture %0) {
%2 = tail call i32 @strcasecmp(i8* %0, i8* getelementptr inbounds ([5 x i8], [5 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 @strcasecmp(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 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 @strcasecmp(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%9 = icmp eq i32 %8, 0
%10 = zext i1 %9 to i8
br label %11
11: ; preds = %7, %1, %4
%12 = phi i8 [ 1, %4 ], [ 1, %1 ], [ %10, %7 ]
ret i8 %12
}