#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 stat {
  int /*<<< orphan*/ st_mode;
};

/* Variables and functions */
int /*<<< orphan*/ EXIT_FAILURE;
int /*<<< orphan*/ S_ISDIR(int /*<<< orphan*/);
int /*<<< orphan*/ errno;
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char const *, ...);
scalar_t__ stat(char const *, struct stat *);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
void verify_directory(const char *directory) {
  struct stat buf;
  if (stat(directory, &buf) < 0) {
    fprintf(stderr, "ERROR: stat of %s failed: %s\n", directory,
            strerror(errno));
    exit(EXIT_FAILURE);
  }
  if (!S_ISDIR(buf.st_mode)) {
    fprintf(stderr, "ERROR: %s exists but is not a directory\n", directory);
    exit(EXIT_FAILURE);
  }
}


x86 assembly (clang, -O0):
<verify_directory>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    -0x10(%rbp),%rsi
call   1050 <stat@plt>
cmp    $0x0,%rax
jge    11bb <verify_directory+0x6b>
mov    0x2e66(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x8(%rbp),%rax
mov    %rax,-0x18(%rbp)
mov    0x2e4a(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
mov    -0x1c(%rbp),%edi
mov    -0x18(%rbp),%rdx
mov    %rax,%rcx
lea    0xe5a(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
mov    0x2e1c(%rip),%rax
mov    (%rax),%edi
call   1060 <exit@plt>
mov    -0x10(%rbp),%edi
call   1030 <S_ISDIR@plt>
cmp    $0x0,%eax
jne    11f5 <verify_directory+0xa5>
mov    0x2e0d(%rip),%rax
mov    (%rax),%edi
mov    -0x8(%rbp),%rdx
lea    0xe3e(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
mov    0x2de2(%rip),%rax
mov    (%rax),%edi
call   1060 <exit@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<verify_directory>:
push   %rbp
push   %rbx
push   %rax
mov    %rdi,%rbx
mov    %rsp,%rsi
call   1050 <stat@plt>
test   %rax,%rax
js     1176 <verify_directory+0x26>
mov    (%rsp),%edi
call   1030 <S_ISDIR@plt>
test   %eax,%eax
je     11a5 <verify_directory+0x55>
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret
mov    0x2e63(%rip),%rax
mov    (%rax),%ebp
mov    0x2e52(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
lea    0xe6c(%rip),%rsi
mov    %ebp,%edi
mov    %rbx,%rdx
mov    %rax,%rcx
xor    %eax,%eax
call   1040 <fprintf@plt>
jmp    11bf <verify_directory+0x6f>
mov    0x2e34(%rip),%rax
mov    (%rax),%edi
lea    0xe69(%rip),%rsi
mov    %rbx,%rdx
xor    %eax,%eax
call   1040 <fprintf@plt>
mov    0x2e0a(%rip),%rax
mov    (%rax),%edi
call   1060 <exit@plt>

LLVM IR (-O0):
%struct.stat = type { i32 }
@stderr = global i32 0
@.str = [30 x i8] c"ERROR: stat of %s failed: %s\0A\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
@.str.1 = [41 x i8] c"ERROR: %s exists but is not a directory\0A\00"
define void @verify_directory(i8* %0) {
%2 = alloca i8*
%3 = alloca %struct.stat
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = call i64 @stat(i8* %4, %struct.stat* %3)
%6 = icmp slt i64 %5, 0
br i1 %6, label %7, label %15
7: ; preds = %1
%8 = load i32, i32* @stderr
%9 = load i8*, i8** %2
%10 = load i32, i32* @errno
%11 = call i8* @strerror(i32 %10)
%12 = call i32 (i32, i8*, i8*, ...) @fprintf(i32 %8, i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i8* %9, i8* %11)
%13 = load i32, i32* @EXIT_FAILURE
%14 = call i32 @exit(i32 %13)
unreachable
15: ; preds = %1
%16 = getelementptr inbounds %struct.stat, %struct.stat* %3, i32 0, i32 0
%17 = load i32, i32* %16
%18 = call i32 @S_ISDIR(i32 %17)
%19 = icmp ne i32 %18, 0
br i1 %19, label %26, label %20
20: ; preds = %15
%21 = load i32, i32* @stderr
%22 = load i8*, i8** %2
%23 = call i32 (i32, i8*, i8*, ...) @fprintf(i32 %21, i8* getelementptr inbounds ([41 x i8], [41 x i8]* @.str.1, i64 0, i64 0), i8* %22)
%24 = load i32, i32* @EXIT_FAILURE
%25 = call i32 @exit(i32 %24)
unreachable
26: ; preds = %15
ret void
}

LLVM IR (-O2):
%struct.stat = type { i32 }
@stderr = global i32 0
@.str = [30 x i8] c"ERROR: stat of %s failed: %s\0A\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
@.str.1 = [41 x i8] c"ERROR: %s exists but is not a directory\0A\00"
define void @verify_directory(i8* %0) {
%2 = alloca %struct.stat
%3 = bitcast %struct.stat* %2 to i8*
%4 = call i64 @stat(i8* %0, %struct.stat* %2)
%5 = icmp slt i64 %4, 0
br i1 %5, label %6, label %13
6: ; preds = %1
%7 = load i32, i32* @stderr
%8 = load i32, i32* @errno
%9 = call i8* @strerror(i32 %8)
%10 = call i32 (i32, i8*, i8*, ...) @fprintf(i32 %7, i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i8* %0, i8* %9)
%11 = load i32, i32* @EXIT_FAILURE
%12 = call i32 @exit(i32 %11)
unreachable
13: ; preds = %1
%14 = getelementptr inbounds %struct.stat, %struct.stat* %2, i64 0, i32 0
%15 = load i32, i32* %14
%16 = call i32 @S_ISDIR(i32 %15)
%17 = icmp eq i32 %16, 0
br i1 %17, label %18, label %23
18: ; preds = %13
%19 = load i32, i32* @stderr
%20 = call i32 (i32, i8*, i8*, ...) @fprintf(i32 %19, i8* getelementptr inbounds ([41 x i8], [41 x i8]* @.str.1, i64 0, i64 0), i8* %0)
%21 = load i32, i32* @EXIT_FAILURE
%22 = call i32 @exit(i32 %21)
unreachable
23: ; preds = %13
ret void
}