#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 */
size_t strlen(char const *);
char const *strstr(char const *, char const *);
bool ends_with(const char *str1, const char *str2) {
  size_t len1 = strlen(str1);
  size_t len2 = strlen(str2);
  if (len1 < len2)
    return false;
  return strstr(str1, str2) + len2 == str1 + len1;
}


x86 assembly (clang, -O0):
<ends_with>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rdi
call   1030 <strlen@plt>
mov    %rax,-0x28(%rbp)
mov    -0x20(%rbp),%rax
cmp    -0x28(%rbp),%rax
jae    1164 <ends_with+0x44>
movl   $0x0,-0x4(%rbp)
jmp    118b <ends_with+0x6b>
mov    -0x10(%rbp),%rdi
mov    -0x18(%rbp),%rsi
call   1040 <strstr@plt>
add    -0x28(%rbp),%rax
mov    -0x10(%rbp),%rcx
add    -0x20(%rbp),%rcx
cmp    %rcx,%rax
sete   %al
and    $0x1,%al
movzbl %al,%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<ends_with>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rsi,%r15
mov    %rdi,%r14
call   1030 <strlen@plt>
mov    %rax,%rbx
mov    %r15,%rdi
call   1030 <strlen@plt>
mov    %rax,%r12
xor    %eax,%eax
cmp    %r12,%rbx
jb     1164 <ends_with+0x44>
mov    %r14,%rdi
mov    %r15,%rsi
call   1040 <strstr@plt>
mov    %rax,%rcx
add    %r12,%rcx
add    %r14,%rbx
xor    %eax,%eax
cmp    %rbx,%rcx
sete   %al
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define i32 @ends_with(i8* %0, i8* %1) {
%3 = alloca i32
%4 = alloca i8*
%5 = alloca i8*
%6 = alloca i64
%7 = alloca i64
store i8* %0, i8** %4
store i8* %1, i8** %5
%8 = load i8*, i8** %4
%9 = call i64 @strlen(i8* %8)
store i64 %9, i64* %6
%10 = load i8*, i8** %5
%11 = call i64 @strlen(i8* %10)
store i64 %11, i64* %7
%12 = load i64, i64* %6
%13 = load i64, i64* %7
%14 = icmp ult i64 %12, %13
br i1 %14, label %15, label %16
15: ; preds = %2
store i32 0, i32* %3
br label %27
16: ; preds = %2
%17 = load i8*, i8** %4
%18 = load i8*, i8** %5
%19 = call i8* @strstr(i8* %17, i8* %18)
%20 = load i64, i64* %7
%21 = getelementptr inbounds i8, i8* %19, i64 %20
%22 = load i8*, i8** %4
%23 = load i64, i64* %6
%24 = getelementptr inbounds i8, i8* %22, i64 %23
%25 = icmp eq i8* %21, %24
%26 = zext i1 %25 to i32
store i32 %26, i32* %3
br label %27
27: ; preds = %16, %15
%28 = load i32, i32* %3
ret i32 %28
}

LLVM IR (-O2):
define i32 @ends_with(i8* %0, i8* nocapture %1) {
%3 = tail call i64 @strlen(i8* dereferenceable(1) %0)
%4 = tail call i64 @strlen(i8* dereferenceable(1) %1)
%5 = icmp ult i64 %3, %4
br i1 %5, label %12, label %6
6: ; preds = %2
%7 = tail call i8* @strstr(i8* dereferenceable(1) %0, i8* dereferenceable(1) %1)
%8 = getelementptr inbounds i8, i8* %7, i64 %4
%9 = getelementptr inbounds i8, i8* %0, i64 %3
%10 = icmp eq i8* %8, %9
%11 = zext i1 %10 to i32
br label %12
12: ; preds = %2, %6
%13 = phi i32 [ %11, %6 ], [ 0, %2 ]
ret i32 %13
}