#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 *);
size_t strlen(char const *);
int checkFileExtn(const char *extn, const char *crashExtn) {
  size_t extnLength;
  size_t apportLength;
  extnLength = strlen(extn);
  apportLength = strlen(crashExtn);
  if (apportLength > extnLength)
    return 0;
  return (strcmp(&extn[extnLength - apportLength], ".crash")) == 0;
}


x86 assembly (clang, -O0):
<checkFileExtn>:
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    -0x28(%rbp),%rax
cmp    -0x20(%rbp),%rax
jbe    1164 <checkFileExtn+0x44>
movl   $0x0,-0x4(%rbp)
jmp    118e <checkFileExtn+0x6e>
mov    -0x10(%rbp),%rdi
mov    -0x20(%rbp),%rax
sub    -0x28(%rbp),%rax
add    %rax,%rdi
lea    0xe86(%rip),%rsi
call   1040 <strcmp@plt>
cmp    $0x0,%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):
<checkFileExtn>:
push   %r15
push   %r14
push   %rbx
mov    %rsi,%r15
mov    %rdi,%r14
call   1030 <strlen@plt>
mov    %rax,%rbx
mov    %r15,%rdi
call   1030 <strlen@plt>
mov    %rax,%rcx
xor    %eax,%eax
sub    %rcx,%rbx
jb     1162 <checkFileExtn+0x42>
add    %rbx,%r14
lea    0xeb1(%rip),%rsi
mov    %r14,%rdi
call   1040 <strcmp@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
sete   %al
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [7 x i8] c".crash\00"
define i32 @checkFileExtn(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* %7
%13 = load i64, i64* %6
%14 = icmp ugt i64 %12, %13
br i1 %14, label %15, label %16
15: ; preds = %2
store i32 0, i32* %3
br label %25
16: ; preds = %2
%17 = load i8*, i8** %4
%18 = load i64, i64* %6
%19 = load i64, i64* %7
%20 = sub i64 %18, %19
%21 = getelementptr inbounds i8, i8* %17, i64 %20
%22 = call i64 @strcmp(i8* %21, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0))
%23 = icmp eq i64 %22, 0
%24 = zext i1 %23 to i32
store i32 %24, i32* %3
br label %25
25: ; preds = %16, %15
%26 = load i32, i32* %3
ret i32 %26
}

LLVM IR (-O2):
@.str = [7 x i8] c".crash\00"
define i32 @checkFileExtn(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 = sub i64 %3, %4
%8 = getelementptr inbounds i8, i8* %0, i64 %7
%9 = tail call i64 @strcmp(i8* %8, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0))
%10 = icmp eq i64 %9, 0
%11 = zext i1 %10 to i32
br label %12
12: ; preds = %2, %6
%13 = phi i32 [ %11, %6 ], [ 0, %2 ]
ret i32 %13
}