#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 *);
int string_ends_with(const char *str, const char *suffix) {
  int str_len = strlen(str);
  int suffix_len = strlen(suffix);
  return (str_len >= suffix_len) &&
         (0 == strcmp(str + (str_len - suffix_len), suffix));
}


x86 assembly (clang, -O0):
<string_ends_with>:
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    -0x14(%rbp),%ecx
xor    %eax,%eax
cmp    -0x18(%rbp),%ecx
mov    %al,-0x19(%rbp)
jl     117f <string_ends_with+0x5f>
mov    -0x8(%rbp),%rdi
mov    -0x14(%rbp),%eax
sub    -0x18(%rbp),%eax
cltq
add    %rax,%rdi
mov    -0x10(%rbp),%rsi
call   1040 <strcmp@plt>
mov    %rax,%rcx
xor    %eax,%eax
cmp    %rcx,%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):
<string_ends_with>:
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
sub    %ecx,%ebp
jl     115d <string_ends_with+0x3d>
movslq %ebp,%rax
add    %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 @string_ends_with(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* %5
%12 = load i32, i32* %6
%13 = icmp sge i32 %11, %12
br i1 %13, label %14, label %24
14: ; preds = %2
%15 = load i8*, i8** %3
%16 = load i32, i32* %5
%17 = load i32, i32* %6
%18 = sub nsw i32 %16, %17
%19 = sext i32 %18 to i64
%20 = getelementptr inbounds i8, i8* %15, i64 %19
%21 = load i8*, i8** %4
%22 = call i64 @strcmp(i8* %20, i8* %21)
%23 = icmp eq i64 0, %22
br label %24
24: ; preds = %14, %2
%25 = phi i1 [ false, %2 ], [ %23, %14 ]
%26 = zext i1 %25 to i32
ret i32 %26
}

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