#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*/ er_match(char *, int /*<<< orphan*/ *);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, ...);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  FILE *fp;
  if (argc != 3) {
    fprintf(stderr, "Uso: my_grep <ER> <arquivo>\n");
    exit(1);
  }
  if ((fp = fopen(argv[2], "r")) == NULL) {
    fprintf(stderr, "Erro ao abrir %s\n", argv[2]);
    exit(1);
  }
  er_match(argv[1], fp);
  fclose(fp);
  exit(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   $0x3,-0x8(%rbp)
je     1191 <main+0x41>
mov    0x2e69(%rip),%rax
mov    (%rax),%edi
lea    0xe80(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdi
lea    0xe7d(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmp    $0x0,%rax
jne    11dc <main+0x8c>
mov    0x2e26(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdx
lea    0xe54(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x18(%rbp),%rsi
call   1060 <er_match@plt>
mov    -0x18(%rbp),%rdi
call   1030 <fclose@plt>
xor    %edi,%edi
call   1070 <exit@plt>

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
cmp    $0x3,%edi
jne    1196 <main+0x46>
mov    %rsi,%rbx
mov    0x10(%rsi),%rdi
lea    0xeb6(%rip),%rsi
call   1050 <fopen@plt>
test   %rax,%rax
jne    11b7 <main+0x67>
mov    0x2e68(%rip),%rax
mov    (%rax),%edi
mov    0x10(%rbx),%rdx
lea    0xe9a(%rip),%rsi
xor    %eax,%eax
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    0x2e43(%rip),%rax
mov    (%rax),%edi
lea    0xe5a(%rip),%rsi
xor    %eax,%eax
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    %rax,%r14
mov    0x8(%rbx),%rdi
mov    %rax,%rsi
call   1060 <er_match@plt>
mov    %r14,%rdi
call   1030 <fclose@plt>
xor    %edi,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [29 x i8] c"Uso: my_grep <ER> <arquivo>\0A\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [18 x i8] c"Erro ao abrir %s\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 ne i32 %7, 3
br i1 %8, label %9, label %13
9: ; preds = %2
%10 = load i32, i32* @stderr
%11 = call i32 (i32, i8*, ...) @fprintf(i32 %10, i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0))
%12 = call i32 @exit(i32 1)
unreachable
13: ; preds = %2
%14 = load i8**, i8*** %5
%15 = getelementptr inbounds i8*, i8** %14, i64 2
%16 = load i8*, i8** %15
%17 = call i32* @fopen(i8* %16, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %17, i32** %6
%18 = icmp eq i32* %17, null
br i1 %18, label %19, label %26
19: ; preds = %13
%20 = load i32, i32* @stderr
%21 = load i8**, i8*** %5
%22 = getelementptr inbounds i8*, i8** %21, i64 2
%23 = load i8*, i8** %22
%24 = call i32 (i32, i8*, ...) @fprintf(i32 %20, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0), i8* %23)
%25 = call i32 @exit(i32 1)
unreachable
26: ; preds = %13
%27 = load i8**, i8*** %5
%28 = getelementptr inbounds i8*, i8** %27, i64 1
%29 = load i8*, i8** %28
%30 = load i32*, i32** %6
%31 = call i32 @er_match(i8* %29, i32* %30)
%32 = load i32*, i32** %6
%33 = call i32 @fclose(i32* %32)
%34 = call i32 @exit(i32 0)
unreachable
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [29 x i8] c"Uso: my_grep <ER> <arquivo>\0A\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [18 x i8] c"Erro ao abrir %s\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 3
br i1 %3, label %8, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = tail call i32 (i32, i8*, ...) @fprintf(i32 %5, i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0))
%7 = tail call i32 @exit(i32 1)
unreachable
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 2
%10 = load i8*, i8** %9
%11 = tail call i32* @fopen(i8* %10, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%12 = icmp eq i32* %11, null
br i1 %12, label %13, label %18
13: ; preds = %8
%14 = load i32, i32* @stderr
%15 = load i8*, i8** %9
%16 = tail call i32 (i32, i8*, ...) @fprintf(i32 %14, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0), i8* %15)
%17 = tail call i32 @exit(i32 1)
unreachable
18: ; preds = %8
%19 = getelementptr inbounds i8*, i8** %1, i64 1
%20 = load i8*, i8** %19
%21 = tail call i32 @er_match(i8* %20, i32* %11)
%22 = tail call i32 @fclose(i32* %11)
%23 = tail call i32 @exit(i32 0)
unreachable
}