#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*/ exit(int);
int /*<<< orphan*/ file_close(int /*<<< orphan*/ *);
int /*<<< orphan*/ *file_open(char *);
int /*<<< orphan*/ file_read(int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *, char *);
int main(int argc, char *argv[]) {
  FILE *file;
  if (argc < 2) {
    printf("Usage: %s file\n", argv[0]);
    exit(1);
  }
  file = file_open(argv[1]);
  file_read(file);
  file_close(file);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    118d <main+0x3d>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xe82(%rip),%rdi
call   1040 <printf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1030 <file_open@plt>
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
call   1060 <file_read@plt>
mov    -0x18(%rbp),%rdi
call   1050 <file_close@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x1,%edi
jle    1176 <main+0x26>
mov    0x8(%rsi),%rdi
call   1030 <file_open@plt>
mov    %rax,%rbx
mov    %rax,%rdi
call   1060 <file_read@plt>
mov    %rbx,%rdi
call   1050 <file_close@plt>
xor    %eax,%eax
pop    %rbx
ret
mov    (%rsi),%rsi
lea    0xe80(%rip),%rdi
call   1040 <printf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [16 x i8] c"Usage: %s file\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 2
br i1 %8, label %9, label %15
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8* %12)
%14 = call i32 @exit(i32 1)
unreachable
15: ; preds = %2
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = call i32* @file_open(i8* %18)
store i32* %19, i32** %6
%20 = load i32*, i32** %6
%21 = call i32 @file_read(i32* %20)
%22 = load i32*, i32** %6
%23 = call i32 @file_close(i32* %22)
ret i32 0
}

LLVM IR (-O2):
@.str = [16 x i8] c"Usage: %s file\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %8
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8* %5)
%7 = tail call i32 @exit(i32 1)
unreachable
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = tail call i32* @file_open(i8* %10)
%12 = tail call i32 @file_read(i32* %11)
%13 = tail call i32 @file_close(i32* %11)
ret i32 0
}