#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 */

/* Variables and functions */
int /*<<< orphan*/ printf(char *, char *);
int /*<<< orphan*/ usleep(int);
void *threadFunc(void *arg) {
  char *str;
  int i = 0;
  str = (char *)arg;
  while (i < 15) {
    usleep(1);
    printf("threadFunc says: %s\n", str);
    ++i;
  }
  return NULL;
}


x86 assembly (clang, -O0):
<threadFunc>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x8(%rbp),%rax
mov    %rax,-0x10(%rbp)
cmpl   $0xf,-0x14(%rbp)
jge    116d <threadFunc+0x4d>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    -0x10(%rbp),%rsi
lea    0xea6(%rip),%rdi
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    113b <threadFunc+0x1b>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<threadFunc>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%rbx
mov    $0x1,%edi
call   1040 <usleep@plt>
lea    0xec8(%rip),%r14
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1040 <usleep@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [21 x i8] c"threadFunc says: %s\0A\00"
define i8* @threadFunc(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32
store i8* %0, i8** %2
store i32 0, i32* %4
%5 = load i8*, i8** %2
store i8* %5, i8** %3
br label %6
6: ; preds = %9, %1
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 15
br i1 %8, label %9, label %15
9: ; preds = %6
%10 = call i32 @usleep(i32 1)
%11 = load i8*, i8** %3
%12 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %11)
%13 = load i32, i32* %4
%14 = add nsw i32 %13, 1
store i32 %14, i32* %4
br label %6
15: ; preds = %6
ret i8* null
}

LLVM IR (-O2):
@.str = [21 x i8] c"threadFunc says: %s\0A\00"
define noalias i8* @threadFunc(i8* %0) {
%2 = tail call i32 @usleep(i32 1)
%3 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%4 = tail call i32 @usleep(i32 1)
%5 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%6 = tail call i32 @usleep(i32 1)
%7 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%8 = tail call i32 @usleep(i32 1)
%9 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%10 = tail call i32 @usleep(i32 1)
%11 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%12 = tail call i32 @usleep(i32 1)
%13 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%14 = tail call i32 @usleep(i32 1)
%15 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%16 = tail call i32 @usleep(i32 1)
%17 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%18 = tail call i32 @usleep(i32 1)
%19 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%20 = tail call i32 @usleep(i32 1)
%21 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%22 = tail call i32 @usleep(i32 1)
%23 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%24 = tail call i32 @usleep(i32 1)
%25 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%26 = tail call i32 @usleep(i32 1)
%27 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%28 = tail call i32 @usleep(i32 1)
%29 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
%30 = tail call i32 @usleep(i32 1)
%31 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i8* %0)
ret i8* null
}