#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 */
typedef int /*<<< orphan*/ uint32_t;
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ errno;
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
char *strerror(int /*<<< orphan*/);
int tbz_compute_stream_crc32(int /*<<< orphan*/ *, int /*<<< orphan*/ *,
                             char **);
int tbz_compute_file_crc32(const char *filename, uint32_t *returned_crc,
                           char **error) {
  FILE *input_f = fopen(filename, "r");
  if (input_f == NULL) {
    *error = strerror(errno);
    return 2;
  }
  int status = tbz_compute_stream_crc32(input_f, returned_crc, error);
  fclose(input_f);
  return status;
}


x86 assembly (clang, -O0):
<tbz_compute_file_crc32>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    %rdx,-0x20(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xea1(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    1197 <tbz_compute_file_crc32+0x57>
mov    0x2e66(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
mov    %rax,%rcx
mov    -0x20(%rbp),%rax
mov    %rcx,(%rax)
movl   $0x2,-0x4(%rbp)
jmp    11ba <tbz_compute_file_crc32+0x7a>
mov    -0x28(%rbp),%rdi
mov    -0x18(%rbp),%rsi
mov    -0x20(%rbp),%rdx
call   1040 <tbz_compute_stream_crc32@plt>
mov    %eax,-0x2c(%rbp)
mov    -0x28(%rbp),%rdi
call   1030 <fclose@plt>
mov    -0x2c(%rbp),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<tbz_compute_file_crc32>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %rdx,%r14
mov    %rsi,%r15
lea    0xeac(%rip),%rsi
call   1050 <fopen@plt>
test   %rax,%rax
je     117d <tbz_compute_file_crc32+0x3d>
mov    %rax,%rbx
mov    %rax,%rdi
mov    %r15,%rsi
mov    %r14,%rdx
call   1040 <tbz_compute_stream_crc32@plt>
mov    %eax,%ebp
mov    %rbx,%rdi
call   1030 <fclose@plt>
mov    %ebp,%eax
jmp    1193 <tbz_compute_file_crc32+0x53>
mov    0x2e5c(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
mov    %rax,(%r14)
mov    $0x2,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@errno = global i32 0
define i32 @tbz_compute_file_crc32(i8* %0, i32* %1, i8** %2) {
%4 = alloca i32
%5 = alloca i8*
%6 = alloca i32*
%7 = alloca i8**
%8 = alloca i32*
%9 = alloca i32
store i8* %0, i8** %5
store i32* %1, i32** %6
store i8** %2, i8*** %7
%10 = load i8*, i8** %5
%11 = call i32* @fopen(i8* %10, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %11, i32** %8
%12 = load i32*, i32** %8
%13 = icmp eq i32* %12, null
br i1 %13, label %14, label %18
14: ; preds = %3
%15 = load i32, i32* @errno
%16 = call i8* @strerror(i32 %15)
%17 = load i8**, i8*** %7
store i8* %16, i8** %17
store i32 2, i32* %4
br label %26
18: ; preds = %3
%19 = load i32*, i32** %8
%20 = load i32*, i32** %6
%21 = load i8**, i8*** %7
%22 = call i32 @tbz_compute_stream_crc32(i32* %19, i32* %20, i8** %21)
store i32 %22, i32* %9
%23 = load i32*, i32** %8
%24 = call i32 @fclose(i32* %23)
%25 = load i32, i32* %9
store i32 %25, i32* %4
br label %26
26: ; preds = %18, %14
%27 = load i32, i32* %4
ret i32 %27
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@errno = global i32 0
define i32 @tbz_compute_file_crc32(i8* nocapture %0, i32* %1, i8** %2) {
%4 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%5 = icmp eq i32* %4, null
br i1 %5, label %6, label %9
6: ; preds = %3
%7 = load i32, i32* @errno
%8 = tail call i8* @strerror(i32 %7)
store i8* %8, i8** %2
br label %12
9: ; preds = %3
%10 = tail call i32 @tbz_compute_stream_crc32(i32* %4, i32* %1, i8** %2)
%11 = tail call i32 @fclose(i32* %4)
br label %12
12: ; preds = %9, %6
%13 = phi i32 [ 2, %6 ], [ %10, %9 ]
ret i32 %13
}