#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*/ getchar();
int /*<<< orphan*/ puts(char *);
int /*<<< orphan*/ strc(char *, char *);
int main() {
  char a[100] = "this is a ", b[] = "book.";
  strc(a, b);
  puts(a);
  getchar();
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x80,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0x70(%rbp),%rdi
lea    0xea3(%rip),%rsi
mov    $0x64,%edx
call   1050 <memcpy@plt>
mov    0xef7(%rip),%eax
mov    %eax,-0x76(%rbp)
mov    0xef1(%rip),%ax
mov    %ax,-0x72(%rbp)
lea    -0x70(%rbp),%rdi
lea    -0x76(%rbp),%rsi
call   1060 <strc@plt>
lea    -0x70(%rbp),%rdi
call   1030 <puts@plt>
mov    $0x0,%al
call   1040 <getchar@plt>
xor    %eax,%eax
add    $0x80,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x80,%rsp
movaps 0xf11(%rip),%xmm0
movaps %xmm0,0x60(%rsp)
movaps 0xef5(%rip),%xmm0
movaps %xmm0,0x50(%rsp)
movaps 0xed9(%rip),%xmm0
movaps %xmm0,0x40(%rsp)
movaps 0xebd(%rip),%xmm0
movaps %xmm0,0x30(%rsp)
movaps 0xea1(%rip),%xmm0
movaps %xmm0,0x20(%rsp)
movaps 0xe85(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movl   $0x0,0x70(%rsp)
movw   $0x2e,0xc(%rsp)
movl   $0x6b6f6f62,0x8(%rsp)
6b
lea    0x10(%rsp),%rbx
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <strc@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
xor    %eax,%eax
add    $0x80,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@__const.main.a = [100 x i8] c"this is a \00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00"
@__const.main.b = [6 x i8] c"book.\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [100 x i8]
%3 = alloca [6 x i8]
store i32 0, i32* %1
%4 = bitcast [100 x i8]* %2 to i8*
%5 = bitcast [6 x i8]* %3 to i8*
%6 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%7 = getelementptr inbounds [6 x i8], [6 x i8]* %3, i64 0, i64 0
%8 = call i32 @strc(i8* %6, i8* %7)
%9 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%10 = call i32 @puts(i8* %9)
%11 = call i32 (...) @getchar()
ret i32 0
}

LLVM IR (-O2):
@__const.main.a = [100 x i8] c"this is a \00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00"
@__const.main.b = [6 x i8] c"book.\00"
define i32 @main() {
%1 = alloca [100 x i8]
%2 = alloca [6 x i8]
%3 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%4 = getelementptr inbounds [6 x i8], [6 x i8]* %2, i64 0, i64 0
%5 = call i32 @strc(i8* %3, i8* %4)
%6 = call i32 @puts(i8* %3)
%7 = call i32 (...) @getchar()
ret i32 0
}