#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 e(char *);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int stbi_info_from_file(int /*<<< orphan*/ *, int *, int *, int *);
int stbi_info(char const *filename, int *x, int *y, int *comp) {
  FILE *f = fopen(filename, "rb");
  int result;
  if (!f)
    return e("Unable to open file");
  result = stbi_info_from_file(f, x, y, comp);
  fclose(f);
  return result;
}


x86 assembly (clang, -O0):
<stbi_info>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    %rdx,-0x20(%rbp)
mov    %rcx,-0x28(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe9d(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x30(%rbp)
cmpq   $0x0,-0x30(%rbp)
jne    118b <stbi_info+0x4b>
lea    0xe85(%rip),%rdi
call   1050 <e@plt>
mov    %eax,-0x4(%rbp)
jmp    11b2 <stbi_info+0x72>
mov    -0x30(%rbp),%rdi
mov    -0x18(%rbp),%rsi
mov    -0x20(%rbp),%rdx
mov    -0x28(%rbp),%rcx
call   1030 <stbi_info_from_file@plt>
mov    %eax,-0x34(%rbp)
mov    -0x30(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x34(%rbp),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<stbi_info>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
mov    %rcx,%r14
mov    %rdx,%r15
mov    %rsi,%r12
lea    0xea8(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
je     118b <stbi_info+0x4b>
mov    %rax,%rbx
mov    %rax,%rdi
mov    %r12,%rsi
mov    %r15,%rdx
mov    %r14,%rcx
call   1030 <stbi_info_from_file@plt>
mov    %eax,%ebp
mov    %rbx,%rdi
call   1040 <fclose@plt>
mov    %ebp,%eax
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret
lea    0xe71(%rip),%rdi
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
jmp    1050 <e@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@.str.1 = [20 x i8] c"Unable to open file\00"
define i32 @stbi_info(i8* %0, i32* %1, i32* %2, i32* %3) {
%5 = alloca i32
%6 = alloca i8*
%7 = alloca i32*
%8 = alloca i32*
%9 = alloca i32*
%10 = alloca i32*
%11 = alloca i32
store i8* %0, i8** %6
store i32* %1, i32** %7
store i32* %2, i32** %8
store i32* %3, i32** %9
%12 = load i8*, i8** %6
%13 = call i32* @fopen(i8* %12, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %13, i32** %10
%14 = load i32*, i32** %10
%15 = icmp ne i32* %14, null
br i1 %15, label %18, label %16
16: ; preds = %4
%17 = call i32 @e(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
store i32 %17, i32* %5
br label %27
18: ; preds = %4
%19 = load i32*, i32** %10
%20 = load i32*, i32** %7
%21 = load i32*, i32** %8
%22 = load i32*, i32** %9
%23 = call i32 @stbi_info_from_file(i32* %19, i32* %20, i32* %21, i32* %22)
store i32 %23, i32* %11
%24 = load i32*, i32** %10
%25 = call i32 @fclose(i32* %24)
%26 = load i32, i32* %11
store i32 %26, i32* %5
br label %27
27: ; preds = %18, %16
%28 = load i32, i32* %5
ret i32 %28
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@.str.1 = [20 x i8] c"Unable to open file\00"
define i32 @stbi_info(i8* nocapture %0, i32* %1, i32* %2, i32* %3) {
%5 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%6 = icmp eq i32* %5, null
br i1 %6, label %7, label %9
7: ; preds = %4
%8 = tail call i32 @e(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
br label %12
9: ; preds = %4
%10 = tail call i32 @stbi_info_from_file(i32* %5, i32* %1, i32* %2, i32* %3)
%11 = tail call i32 @fclose(i32* %5)
br label %12
12: ; preds = %9, %7
%13 = phi i32 [ %10, %9 ], [ %8, %7 ]
ret i32 %13
}