#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__ atoi(char const *);
scalar_t__ strcasecmp(char const *, char *);
int string_istrue(const char *str) {
  if (str == NULL)
    str = "";
  return (strcasecmp(str, "true") == 0) || (strcasecmp(str, "yes") == 0) ||
         (atoi(str) > 0);
}


x86 assembly (clang, -O0):
<string_istrue>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
cmpq   $0x0,-0x8(%rbp)
jne    1142 <string_istrue+0x22>
lea    0xec6(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xeb3(%rip),%rsi
call   1030 <strcasecmp@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0x9(%rbp)
je     1199 <string_istrue+0x79>
mov    -0x8(%rbp),%rdi
lea    0xe96(%rip),%rsi
call   1030 <strcasecmp@plt>
mov    %rax,%rcx
mov    $0x1,%al
cmp    $0x0,%rcx
mov    %al,-0x9(%rbp)
je     1199 <string_istrue+0x79>
mov    -0x8(%rbp),%rdi
call   1040 <atoi@plt>
cmp    $0x0,%rax
setg   %al
mov    %al,-0x9(%rbp)
mov    -0x9(%rbp),%al
and    $0x1,%al
movzbl %al,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<string_istrue>:
push   %rbp
push   %rbx
push   %rax
test   %rdi,%rdi
lea    0xed7(%rip),%rbx
cmovne %rdi,%rbx
lea    0xec8(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
mov    $0x1,%ebp
test   %rax,%rax
je     116f <string_istrue+0x4f>
lea    0xeb4(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
test   %rax,%rax
je     116f <string_istrue+0x4f>
mov    %rbx,%rdi
call   1040 <atoi@plt>
xor    %ebp,%ebp
test   %rax,%rax
setg   %bpl
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [1 x i8] zeroinitializer
@.str.1 = [5 x i8] c"true\00"
@.str.2 = [4 x i8] c"yes\00"
define i32 @string_istrue(i8* %0) {
%2 = alloca i8*
store i8* %0, i8** %2
%3 = load i8*, i8** %2
%4 = icmp eq i8* %3, null
br i1 %4, label %5, label %6
5: ; preds = %1
store i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i8** %2
br label %6
6: ; preds = %5, %1
%7 = load i8*, i8** %2
%8 = call i64 @strcasecmp(i8* %7, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
%9 = icmp eq i64 %8, 0
br i1 %9, label %18, label %10
10: ; preds = %6
%11 = load i8*, i8** %2
%12 = call i64 @strcasecmp(i8* %11, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%13 = icmp eq i64 %12, 0
br i1 %13, label %18, label %14
14: ; preds = %10
%15 = load i8*, i8** %2
%16 = call i64 @atoi(i8* %15)
%17 = icmp sgt i64 %16, 0
br label %18
18: ; preds = %14, %10, %6
%19 = phi i1 [ true, %10 ], [ true, %6 ], [ %17, %14 ]
%20 = zext i1 %19 to i32
ret i32 %20
}

LLVM IR (-O2):
@.str = [1 x i8] zeroinitializer
@.str.1 = [5 x i8] c"true\00"
@.str.2 = [4 x i8] c"yes\00"
define i32 @string_istrue(i8* %0) {
%2 = icmp eq i8* %0, null
%3 = select i1 %2, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i8* %0
%4 = tail call i64 @strcasecmp(i8* %3, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
%5 = icmp eq i64 %4, 0
br i1 %5, label %13, label %6
6: ; preds = %1
%7 = tail call i64 @strcasecmp(i8* %3, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%8 = icmp eq i64 %7, 0
br i1 %8, label %13, label %9
9: ; preds = %6
%10 = tail call i64 @atoi(i8* %3)
%11 = icmp sgt i64 %10, 0
%12 = zext i1 %11 to i32
br label %13
13: ; preds = %9, %6, %1
%14 = phi i32 [ 1, %6 ], [ 1, %1 ], [ %12, %9 ]
ret i32 %14
}