#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_dev;
};
typedef int /*<<< orphan*/ dev_t;

/* Variables and functions */
int /*<<< orphan*/ EXIT_FAILURE;
int /*<<< orphan*/ errno;
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
scalar_t__ stat(char const *, struct stat *);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
dev_t get_dev_id(const char *path) {
  struct stat buf;
  if (stat(path, &buf) < 0) {
    fprintf(stderr, "stat() failed (%s)\n", strerror(errno));
    exit(EXIT_FAILURE);
  }
  return buf.st_dev;
}


x86 assembly (clang, -O0):
<get_dev_id>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <stat@plt>
cmp    $0x0,%rax
jge    119d <get_dev_id+0x5d>
mov    0x2e76(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x14(%rbp)
mov    0x2e62(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
mov    -0x14(%rbp),%edi
mov    %rax,%rdx
lea    0xe76(%rip),%rsi
call   1030 <fprintf@plt>
mov    0x2e3a(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>
mov    -0x10(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_dev_id>:
push   %rbx
sub    $0x10,%rsp
lea    0x8(%rsp),%rsi
call   1040 <stat@plt>
test   %rax,%rax
js     115e <get_dev_id+0x1e>
mov    0x8(%rsp),%eax
add    $0x10,%rsp
pop    %rbx
ret
mov    0x2e7b(%rip),%rax
mov    (%rax),%ebx
mov    0x2e6a(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
lea    0xe84(%rip),%rsi
mov    %ebx,%edi
mov    %rax,%rdx
call   1030 <fprintf@plt>
mov    0x2e43(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>

LLVM IR (-O0):
%struct.stat = type { i32 }
@stderr = global i32 0
@.str = [20 x i8] c"stat() failed (%s)\0A\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
define i32 @get_dev_id(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 %14
7: ; preds = %1
%8 = load i32, i32* @stderr
%9 = load i32, i32* @errno
%10 = call i8* @strerror(i32 %9)
%11 = call i32 @fprintf(i32 %8, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i8* %10)
%12 = load i32, i32* @EXIT_FAILURE
%13 = call i32 @exit(i32 %12)
unreachable
14: ; preds = %1
%15 = getelementptr inbounds %struct.stat, %struct.stat* %3, i32 0, i32 0
%16 = load i32, i32* %15
ret i32 %16
}

LLVM IR (-O2):
%struct.stat = type { i32 }
@stderr = global i32 0
@.str = [20 x i8] c"stat() failed (%s)\0A\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
define i32 @get_dev_id(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 @fprintf(i32 %7, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 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
ret i32 %15
}