#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*/ pthread_t;
typedef int /*<<< orphan*/ pthread_attr_t;

/* Variables and functions */
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ pthread_attr_init(int /*<<< orphan*/ *);
int pthread_create(int /*<<< orphan*/ *, int /*<<< orphan*/ *,
                   void *(*)(void *), void *);
int /*<<< orphan*/ stderr;
char *strerror(int);
void create_worker(void *(*func)(void *), void *arg) {
  int ret;
  pthread_t thread;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  if ((ret = pthread_create(&thread, &attr, func, arg)) != 0) {
    fprintf(stderr, "Can't create thread: %s\n", strerror(ret));
    exit(1);
  }
}


x86 assembly (clang, -O0):
<create_worker>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    -0x1c(%rbp),%rdi
call   1030 <pthread_attr_init@plt>
mov    -0x8(%rbp),%rdx
mov    -0x10(%rbp),%rcx
lea    -0x18(%rbp),%rdi
lea    -0x1c(%rbp),%rsi
call   1050 <pthread_create@plt>
mov    %eax,-0x14(%rbp)
cmp    $0x0,%eax
je     11ba <create_worker+0x6a>
mov    0x2e4f(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x20(%rbp)
mov    -0x14(%rbp),%edi
call   1070 <strerror@plt>
mov    -0x20(%rbp),%edi
mov    %rax,%rdx
lea    0xe55(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<create_worker>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
mov    %rsi,%r14
mov    %rdi,%rbx
lea    0x8(%rsp),%r15
mov    %r15,%rdi
call   1030 <pthread_attr_init@plt>
lea    0xc(%rsp),%rdi
mov    %r15,%rsi
mov    %rbx,%rdx
mov    %r14,%rcx
call   1050 <pthread_create@plt>
test   %eax,%eax
jne    118d <create_worker+0x3d>
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret
mov    0x2e4c(%rip),%rcx
mov    (%rcx),%ebx
mov    %eax,%edi
call   1070 <strerror@plt>
lea    0xe5c(%rip),%rsi
mov    %ebx,%edi
mov    %rax,%rdx
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [25 x i8] c"Can't create thread: %s\0A\00"
define void @create_worker(i8* (i8*)* %0, i8* %1) {
%3 = alloca i8* (i8*)*
%4 = alloca i8*
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
store i8* (i8*)* %0, i8* (i8*)** %3
store i8* %1, i8** %4
%8 = call i32 @pthread_attr_init(i32* %7)
%9 = load i8* (i8*)*, i8* (i8*)** %3
%10 = load i8*, i8** %4
%11 = call i32 @pthread_create(i32* %6, i32* %7, i8* (i8*)* %9, i8* %10)
store i32 %11, i32* %5
%12 = icmp ne i32 %11, 0
br i1 %12, label %13, label %19
13: ; preds = %2
%14 = load i32, i32* @stderr
%15 = load i32, i32* %5
%16 = call i8* @strerror(i32 %15)
%17 = call i32 @fprintf(i32 %14, i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0), i8* %16)
%18 = call i32 @exit(i32 1)
unreachable
19: ; preds = %2
ret void
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [25 x i8] c"Can't create thread: %s\0A\00"
define void @create_worker(i8* (i8*)* %0, i8* %1) {
%3 = alloca i32
%4 = alloca i32
%5 = bitcast i32* %3 to i8*
%6 = bitcast i32* %4 to i8*
%7 = call i32 @pthread_attr_init(i32* %4)
%8 = call i32 @pthread_create(i32* %3, i32* %4, i8* (i8*)* %0, i8* %1)
%9 = icmp eq i32 %8, 0
br i1 %9, label %15, label %10
10: ; preds = %2
%11 = load i32, i32* @stderr
%12 = call i8* @strerror(i32 %8)
%13 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0), i8* %12)
%14 = call i32 @exit(i32 1)
unreachable
15: ; preds = %2
ret void
}