#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*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ SEEK_END;
int /*<<< orphan*/ SEEK_SET;
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, long, int /*<<< orphan*/);
int ftell(int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *, char *);
FILE *openImage(char *filename, int *numbytes) {
  FILE *infile = fopen(filename, "rb");
  if (infile == NULL) {
    printf("File not found %s\n", filename);
    exit(1);
  }
  fseek(infile, 0L, SEEK_END);
  *numbytes = ftell(infile);
  fseek(infile, 0L, SEEK_SET);
  return infile;
}


x86 assembly (clang, -O0):
<openImage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe95(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    1199 <openImage+0x49>
mov    -0x8(%rbp),%rsi
lea    0xe79(%rip),%rdi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x18(%rbp),%rdi
mov    0x2e44(%rip),%rax
mov    (%rax),%edx
xor    %eax,%eax
mov    %eax,%esi
call   1050 <fseek@plt>
mov    -0x18(%rbp),%rdi
call   1040 <ftell@plt>
mov    %eax,%ecx
mov    -0x10(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x18(%rbp),%rdi
mov    0x2e0d(%rip),%rax
mov    (%rax),%edx
xor    %eax,%eax
mov    %eax,%esi
call   1050 <fseek@plt>
mov    -0x18(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<openImage>:
push   %r15
push   %r14
push   %rbx
mov    %rsi,%r14
mov    %rdi,%r15
lea    0xe9e(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
je     11a9 <openImage+0x59>
mov    %rax,%rbx
mov    0x2e72(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1050 <fseek@plt>
mov    %rbx,%rdi
call   1040 <ftell@plt>
mov    %eax,(%r14)
mov    0x2e44(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1050 <fseek@plt>
mov    %rbx,%rax
pop    %rbx
pop    %r14
pop    %r15
ret
lea    0xe53(%rip),%rdi
mov    %r15,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@.str.1 = [19 x i8] c"File not found %s\0A\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define i32* @openImage(i8* %0, i32* %1) {
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i32*
store i8* %0, i8** %3
store i32* %1, i32** %4
%6 = load i8*, i8** %3
%7 = call i32* @fopen(i8* %6, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %7, i32** %5
%8 = load i32*, i32** %5
%9 = icmp eq i32* %8, null
br i1 %9, label %10, label %14
10: ; preds = %2
%11 = load i8*, i8** %3
%12 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0), i8* %11)
%13 = call i32 @exit(i32 1)
unreachable
14: ; preds = %2
%15 = load i32*, i32** %5
%16 = load i32, i32* @SEEK_END
%17 = call i32 @fseek(i32* %15, i64 0, i32 %16)
%18 = load i32*, i32** %5
%19 = call i32 @ftell(i32* %18)
%20 = load i32*, i32** %4
store i32 %19, i32* %20
%21 = load i32*, i32** %5
%22 = load i32, i32* @SEEK_SET
%23 = call i32 @fseek(i32* %21, i64 0, i32 %22)
%24 = load i32*, i32** %5
ret i32* %24
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@.str.1 = [19 x i8] c"File not found %s\0A\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define noalias i32* @openImage(i8* %0, i32* nocapture writeonly %1) {
%3 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%4 = icmp eq i32* %3, null
br i1 %4, label %5, label %8
5: ; preds = %2
%6 = tail call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0), i8* %0)
%7 = tail call i32 @exit(i32 1)
unreachable
8: ; preds = %2
%9 = load i32, i32* @SEEK_END
%10 = tail call i32 @fseek(i32* %3, i64 0, i32 %9)
%11 = tail call i32 @ftell(i32* %3)
store i32 %11, i32* %1
%12 = load i32, i32* @SEEK_SET
%13 = tail call i32 @fseek(i32* %3, i64 0, i32 %12)
ret i32* %3
}