#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 */
struct tm {
  int dummy;
};

/* Variables and functions */
scalar_t__ chdir(char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *);
int /*<<< orphan*/ perror(char *);
int /*<<< orphan*/ stderr;
int cd(char **command, struct tm start) {
  if (command[1] == NULL) {
    fprintf(stderr, "expected argument to \"cd\"\r\n");
  } else {
    if (chdir(command[1]) != 0) {
      perror("error cd:");
      return 1;
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<cd>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %esi,-0x8(%rbp)
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rax
cmpq   $0x0,0x8(%rax)
jne    1168 <cd+0x38>
mov    0x2e8b(%rip),%rax
mov    (%rax),%edi
lea    0xea2(%rip),%rsi
call   1040 <fprintf@plt>
jmp    119c <cd+0x6c>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1030 <chdir@plt>
cmp    $0x0,%rax
je     1197 <cd+0x67>
lea    0xe96(%rip),%rdi
call   1050 <perror@plt>
movl   $0x1,-0x4(%rbp)
jmp    11a3 <cd+0x73>
jmp    119c <cd+0x6c>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<cd>:
push   %rax
mov    0x8(%rdi),%rdi
test   %rdi,%rdi
je     114b <cd+0x1b>
call   1030 <chdir@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
jne    1164 <cd+0x34>
pop    %rcx
ret
mov    0x2e8e(%rip),%rax
mov    (%rax),%edi
lea    0xea5(%rip),%rsi
call   1040 <fprintf@plt>
xor    %eax,%eax
pop    %rcx
ret
lea    0xeb1(%rip),%rdi
call   1050 <perror@plt>
mov    $0x1,%eax
pop    %rcx
ret

LLVM IR (-O0):
%struct.tm = type { i32 }
@stderr = global i32 0
@.str = [28 x i8] c"expected argument to \22cd\22\0D\0A\00"
@.str.1 = [10 x i8] c"error cd:\00"
define i32 @cd(i8** %0, i32 %1) {
%3 = alloca i32
%4 = alloca %struct.tm
%5 = alloca i8**
%6 = getelementptr inbounds %struct.tm, %struct.tm* %4, i32 0, i32 0
store i32 %1, i32* %6
store i8** %0, i8*** %5
%7 = load i8**, i8*** %5
%8 = getelementptr inbounds i8*, i8** %7, i64 1
%9 = load i8*, i8** %8
%10 = icmp eq i8* %9, null
br i1 %10, label %11, label %14
11: ; preds = %2
%12 = load i32, i32* @stderr
%13 = call i32 @fprintf(i32 %12, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0))
br label %23
14: ; preds = %2
%15 = load i8**, i8*** %5
%16 = getelementptr inbounds i8*, i8** %15, i64 1
%17 = load i8*, i8** %16
%18 = call i64 @chdir(i8* %17)
%19 = icmp ne i64 %18, 0
br i1 %19, label %20, label %22
20: ; preds = %14
%21 = call i32 @perror(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0))
store i32 1, i32* %3
br label %24
22: ; preds = %14
br label %23
23: ; preds = %22, %11
store i32 0, i32* %3
br label %24
24: ; preds = %23, %20
%25 = load i32, i32* %3
ret i32 %25
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [28 x i8] c"expected argument to \22cd\22\0D\0A\00"
@.str.1 = [10 x i8] c"error cd:\00"
define i32 @cd(i8** nocapture %0, i32 %1) {
%3 = getelementptr inbounds i8*, i8** %0, i64 1
%4 = load i8*, i8** %3
%5 = icmp eq i8* %4, null
br i1 %5, label %6, label %9
6: ; preds = %2
%7 = load i32, i32* @stderr
%8 = tail call i32 @fprintf(i32 %7, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0))
br label %14
9: ; preds = %2
%10 = tail call i64 @chdir(i8* %4)
%11 = icmp eq i64 %10, 0
br i1 %11, label %14, label %12
12: ; preds = %9
%13 = tail call i32 @perror(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0))
br label %14
14: ; preds = %6, %9, %12
%15 = phi i32 [ 1, %12 ], [ 0, %9 ], [ 0, %6 ]
ret i32 %15
}