#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*/ uid_t;
struct stat {
  int /*<<< orphan*/ st_uid;
};
typedef int /*<<< orphan*/ gid_t;

/* Variables and functions */
int /*<<< orphan*/ EXIT_FAILURE;
scalar_t__ chown(char const *, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *);
scalar_t__ stat(char const *, struct stat *);
int /*<<< orphan*/ stderr;
void do_chgrp(const char *filename, uid_t group) {
  gid_t owner;
  struct stat st;
  if (stat(filename, &st) < 0) {
    fprintf(stderr, "chgrp: cannot stat()\n");
    exit(EXIT_FAILURE);
  }
  owner = st.st_uid;
  if (chown(filename, owner, group) < 0) {
    fprintf(stderr, "chgrp: cannot chown()\n");
    exit(EXIT_FAILURE);
  }
}


x86 assembly (clang, -O0):
<do_chgrp>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    -0x8(%rbp),%rdi
lea    -0x18(%rbp),%rsi
call   1040 <stat@plt>
cmp    $0x0,%rax
jge    1189 <do_chgrp+0x49>
mov    0x2e73(%rip),%rax
mov    (%rax),%edi
lea    0xe8a(%rip),%rsi
call   1030 <fprintf@plt>
mov    0x2e56(%rip),%rax
mov    (%rax),%edi
call   1060 <exit@plt>
mov    -0x18(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%esi
mov    -0xc(%rbp),%edx
call   1050 <chown@plt>
cmp    $0x0,%rax
jge    11cb <do_chgrp+0x8b>
mov    0x2e31(%rip),%rax
mov    (%rax),%edi
lea    0xe5e(%rip),%rsi
call   1030 <fprintf@plt>
mov    0x2e14(%rip),%rax
mov    (%rax),%edi
call   1060 <exit@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<do_chgrp>:
push   %rbp
push   %rbx
push   %rax
mov    %esi,%ebp
mov    %rdi,%rbx
mov    %rsp,%rsi
call   1040 <stat@plt>
test   %rax,%rax
js     116e <do_chgrp+0x2e>
mov    (%rsp),%esi
mov    %rbx,%rdi
mov    %ebp,%edx
call   1050 <chown@plt>
test   %rax,%rax
js     1180 <do_chgrp+0x40>
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret
mov    0x2e6b(%rip),%rax
mov    (%rax),%edi
lea    0xe82(%rip),%rsi
jmp    1190 <do_chgrp+0x50>
mov    0x2e59(%rip),%rax
mov    (%rax),%edi
lea    0xe86(%rip),%rsi
call   1030 <fprintf@plt>
mov    0x2e3c(%rip),%rax
mov    (%rax),%edi
call   1060 <exit@plt>

LLVM IR (-O0):
%struct.stat = type { i32 }
@stderr = global i32 0
@.str = [22 x i8] c"chgrp: cannot stat()\0A\00"
@EXIT_FAILURE = global i32 0
@.str.1 = [23 x i8] c"chgrp: cannot chown()\0A\00"
define void @do_chgrp(i8* %0, i32 %1) {
%3 = alloca i8*
%4 = alloca i32
%5 = alloca i32
%6 = alloca %struct.stat
store i8* %0, i8** %3
store i32 %1, i32* %4
%7 = load i8*, i8** %3
%8 = call i64 @stat(i8* %7, %struct.stat* %6)
%9 = icmp slt i64 %8, 0
br i1 %9, label %10, label %15
10: ; preds = %2
%11 = load i32, i32* @stderr
%12 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
%13 = load i32, i32* @EXIT_FAILURE
%14 = call i32 @exit(i32 %13)
unreachable
15: ; preds = %2
%16 = getelementptr inbounds %struct.stat, %struct.stat* %6, i32 0, i32 0
%17 = load i32, i32* %16
store i32 %17, i32* %5
%18 = load i8*, i8** %3
%19 = load i32, i32* %5
%20 = load i32, i32* %4
%21 = call i64 @chown(i8* %18, i32 %19, i32 %20)
%22 = icmp slt i64 %21, 0
br i1 %22, label %23, label %28
23: ; preds = %15
%24 = load i32, i32* @stderr
%25 = call i32 @fprintf(i32 %24, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0))
%26 = load i32, i32* @EXIT_FAILURE
%27 = call i32 @exit(i32 %26)
unreachable
28: ; preds = %15
ret void
}

LLVM IR (-O2):
%struct.stat = type { i32 }
@stderr = global i32 0
@.str = [22 x i8] c"chgrp: cannot stat()\0A\00"
@EXIT_FAILURE = global i32 0
@.str.1 = [23 x i8] c"chgrp: cannot chown()\0A\00"
define void @do_chgrp(i8* %0, i32 %1) {
%3 = alloca %struct.stat
%4 = bitcast %struct.stat* %3 to i8*
%5 = call i64 @stat(i8* %0, %struct.stat* %3)
%6 = icmp slt i64 %5, 0
br i1 %6, label %7, label %12
7: ; preds = %2
%8 = load i32, i32* @stderr
%9 = call i32 @fprintf(i32 %8, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
%10 = load i32, i32* @EXIT_FAILURE
%11 = call i32 @exit(i32 %10)
unreachable
12: ; preds = %2
%13 = getelementptr inbounds %struct.stat, %struct.stat* %3, i64 0, i32 0
%14 = load i32, i32* %13
%15 = call i64 @chown(i8* %0, i32 %14, i32 %1)
%16 = icmp slt i64 %15, 0
br i1 %16, label %17, label %22
17: ; preds = %12
%18 = load i32, i32* @stderr
%19 = call i32 @fprintf(i32 %18, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0))
%20 = load i32, i32* @EXIT_FAILURE
%21 = call i32 @exit(i32 %20)
unreachable
22: ; preds = %12
ret void
}