#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 *, ...);
int /*<<< orphan*/ scanf(char *, char *, char *, char *);
int main(void) {
  char s1[81], s2[81], s3[81];
  printf("Enter text:\n");
  scanf("%s%s%s", s1, s2, s3);
  printf("\ns1 = %s\ns2 = %s\ns3 = %s", s1, s2, s3);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x120,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xec7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x60(%rbp),%rsi
lea    -0xc0(%rbp),%rdx
lea    -0x120(%rbp),%rcx
lea    0xeb4(%rip),%rdi
call   1040 <scanf@plt>
lea    -0x60(%rbp),%rsi
lea    -0xc0(%rbp),%rdx
lea    -0x120(%rbp),%rcx
lea    0xe9d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x120,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x120,%rsp
lea    0xedd(%rip),%rdi
call   1030 <puts@plt>
lea    0xeb1(%rip),%rdi
lea    0xc0(%rsp),%rbx
lea    0x60(%rsp),%r14
mov    %rsp,%r15
mov    %rbx,%rsi
mov    %r14,%rdx
mov    %r15,%rcx
call   1050 <scanf@plt>
lea    0xe93(%rip),%rdi
mov    %rbx,%rsi
mov    %r14,%rdx
mov    %r15,%rcx
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x120,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [13 x i8] c"Enter text:\0A\00"
@.str.1 = [7 x i8] c"%s%s%s\00"
@.str.2 = [25 x i8] c"\0As1 = %s\0As2 = %s\0As3 = %s\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [81 x i8]
%3 = alloca [81 x i8]
%4 = alloca [81 x i8]
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%6 = getelementptr inbounds [81 x i8], [81 x i8]* %2, i64 0, i64 0
%7 = getelementptr inbounds [81 x i8], [81 x i8]* %3, i64 0, i64 0
%8 = getelementptr inbounds [81 x i8], [81 x i8]* %4, i64 0, i64 0
%9 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i8* %6, i8* %7, i8* %8)
%10 = getelementptr inbounds [81 x i8], [81 x i8]* %2, i64 0, i64 0
%11 = getelementptr inbounds [81 x i8], [81 x i8]* %3, i64 0, i64 0
%12 = getelementptr inbounds [81 x i8], [81 x i8]* %4, i64 0, i64 0
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i8* %10, i8* %11, i8* %12)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [7 x i8] c"%s%s%s\00"
@.str.2 = [25 x i8] c"\0As1 = %s\0As2 = %s\0As3 = %s\00"
@str = [12 x i8] c"Enter text:\00"
define i32 @main() {
%1 = alloca [81 x i8]
%2 = alloca [81 x i8]
%3 = alloca [81 x i8]
%4 = getelementptr inbounds [81 x i8], [81 x i8]* %1, i64 0, i64 0
%5 = getelementptr inbounds [81 x i8], [81 x i8]* %2, i64 0, i64 0
%6 = getelementptr inbounds [81 x i8], [81 x i8]* %3, i64 0, i64 0
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i8* %4, i8* %5, i8* %6)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i8* %4, i8* %5, i8* %6)
ret i32 0
}