#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__ strcmp(char const *, char const *);
int strlen(char const *);
bool strends(const char *s, const char *e) {
  int sl = strlen(s);
  int el = strlen(e);
  return el <= sl && strcmp(s + sl - el, e) == 0;
}


x86 assembly (clang, -O0):
<strends>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x18(%rbp)
mov    -0x18(%rbp),%ecx
xor    %eax,%eax
cmp    -0x14(%rbp),%ecx
mov    %al,-0x19(%rbp)
jg     1183 <strends+0x63>
mov    -0x8(%rbp),%rdi
movslq -0x14(%rbp),%rax
add    %rax,%rdi
movslq -0x18(%rbp),%rcx
xor    %eax,%eax
sub    %rcx,%rax
add    %rax,%rdi
mov    -0x10(%rbp),%rsi
call   1040 <strcmp@plt>
cmp    $0x0,%rax
sete   %al
mov    %al,-0x19(%rbp)
mov    -0x19(%rbp),%al
and    $0x1,%al
movzbl %al,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<strends>:
push   %rbp
push   %r14
push   %rbx
mov    %rsi,%r14
mov    %rdi,%rbx
call   1030 <strlen@plt>
mov    %eax,%ebp
mov    %r14,%rdi
call   1030 <strlen@plt>
mov    %eax,%ecx
xor    %eax,%eax
cmp    %ebp,%ecx
jg     1163 <strends+0x43>
movslq %ebp,%rax
add    %rax,%rbx
movslq %ecx,%rax
sub    %rax,%rbx
mov    %rbx,%rdi
mov    %r14,%rsi
call   1040 <strcmp@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
sete   %al
pop    %rbx
pop    %r14
pop    %rbp
ret

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

LLVM IR (-O2):
define i32 @strends(i8* %0, i8* %1) {
%3 = tail call i32 @strlen(i8* %0)
%4 = tail call i32 @strlen(i8* %1)
%5 = icmp sgt i32 %4, %3
br i1 %5, label %15, label %6
6: ; preds = %2
%7 = sext i32 %3 to i64
%8 = getelementptr inbounds i8, i8* %0, i64 %7
%9 = sext i32 %4 to i64
%10 = sub nsw i64 0, %9
%11 = getelementptr inbounds i8, i8* %8, i64 %10
%12 = tail call i64 @strcmp(i8* %11, i8* %1)
%13 = icmp eq i64 %12, 0
%14 = zext i1 %13 to i32
br label %15
15: ; preds = %6, %2
%16 = phi i32 [ 0, %2 ], [ %14, %6 ]
ret i32 %16
}