#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*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fgets(char *, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ puts(char *);
void cat(char archivo[15]) {
  FILE *fr;
  char linea[80];
  fr = fopen(archivo, "rt");
  while (fgets(linea, 80, fr) != NULL) {
    printf(linea);
  }
  fclose(fr);
  puts("\n");
}


x86 assembly (clang, -O0):
<cat>:
push   %rbp
mov    %rsp,%rbp
sub    $0x60,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe99(%rip),%rsi
call   1070 <fopen@plt>
mov    %rax,-0x10(%rbp)
lea    -0x60(%rbp),%rdi
mov    -0x10(%rbp),%rdx
mov    $0x50,%esi
call   1060 <fgets@plt>
cmp    $0x0,%rax
je     119a <cat+0x4a>
lea    -0x60(%rbp),%rdi
call   1050 <printf@plt>
jmp    1170 <cat+0x20>
mov    -0x10(%rbp),%rdi
call   1040 <fclose@plt>
lea    0xe59(%rip),%rdi
call   1030 <puts@plt>
add    $0x60,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<cat>:
push   %r14
push   %rbx
sub    $0x58,%rsp
lea    0xea2(%rip),%rsi
call   1070 <fopen@plt>
mov    %rax,%r14
mov    %rsp,%rdi
mov    $0x50,%esi
mov    %rax,%rdx
call   1060 <fgets@plt>
test   %rax,%rax
je     119d <cat+0x4d>
mov    %rsp,%rbx
xchg   %ax,%ax
mov    %rbx,%rdi
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x50,%esi
mov    %r14,%rdx
call   1060 <fgets@plt>
test   %rax,%rax
jne    1180 <cat+0x30>
mov    %r14,%rdi
call   1040 <fclose@plt>
lea    0xe57(%rip),%rdi
call   1030 <puts@plt>
add    $0x58,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [3 x i8] c"rt\00"
@.str.1 = [2 x i8] c"\0A\00"
define void @cat(i8* %0) {
%2 = alloca i8*
%3 = alloca i32*
%4 = alloca [80 x i8]
store i8* %0, i8** %2
%5 = load i8*, i8** %2
%6 = call i32* @fopen(i8* %5, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %6, i32** %3
br label %7
7: ; preds = %12, %1
%8 = getelementptr inbounds [80 x i8], [80 x i8]* %4, i64 0, i64 0
%9 = load i32*, i32** %3
%10 = call i32* @fgets(i8* %8, i32 80, i32* %9)
%11 = icmp ne i32* %10, null
br i1 %11, label %12, label %15
12: ; preds = %7
%13 = getelementptr inbounds [80 x i8], [80 x i8]* %4, i64 0, i64 0
%14 = call i32 @printf(i8* %13)
br label %7
15: ; preds = %7
%16 = load i32*, i32** %3
%17 = call i32 @fclose(i32* %16)
%18 = call i32 @puts(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str = [3 x i8] c"rt\00"
@.str.1 = [2 x i8] c"\0A\00"
define void @cat(i8* nocapture %0) {
%2 = alloca [80 x i8]
%3 = getelementptr inbounds [80 x i8], [80 x i8]* %2, i64 0, i64 0
%4 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%5 = call i32* @fgets(i8* %3, i32 80, i32* %4)
%6 = icmp eq i32* %5, null
br i1 %6, label %11, label %7
7: ; preds = %1, %7
%8 = call i32 @printf(i8* %3)
%9 = call i32* @fgets(i8* %3, i32 80, i32* %4)
%10 = icmp eq i32* %9, null
br i1 %10, label %11, label %7
11: ; preds = %7, %1
%12 = call i32 @fclose(i32* %4)
%13 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
ret void
}