#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 *);
int main() {
  char fname1[100], sname1[100], fullname[100];
  printf("fname1: ");
  scanf("%[^\n]", fname1);
  printf("sname1: ");
  scanf("%s", sname1);
  printf("fullname: ");
  scanf(" %[^\n]", fullname);
  printf("\n** Output **\n");
  printf("%s %s\n", fname1, sname1);
  printf("%s\n", fullname);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x150,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xec7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x70(%rbp),%rsi
lea    0xed6(%rip),%rdi
call   1040 <scanf@plt>
lea    0xeb2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0xe0(%rbp),%rsi
lea    0xea6(%rip),%rdi
call   1040 <scanf@plt>
lea    0xe9d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x150(%rbp),%rsi
lea    0xe93(%rip),%rdi
call   1040 <scanf@plt>
lea    0xe8e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x70(%rbp),%rsi
lea    -0xe0(%rbp),%rdx
lea    0xe84(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x150(%rbp),%rsi
lea    0xe72(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x150,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x150,%rsp
lea    0xebd(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xed0(%rip),%rdi
lea    0xe0(%rsp),%r14
mov    %r14,%rsi
call   1050 <scanf@plt>
lea    0xea1(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe9c(%rip),%rdi
lea    0x70(%rsp),%r15
mov    %r15,%rsi
call   1050 <scanf@plt>
lea    0xe8b(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe88(%rip),%rdi
mov    %rsp,%rbx
mov    %rbx,%rsi
call   1050 <scanf@plt>
lea    0xe84(%rip),%rdi
call   1030 <puts@plt>
lea    0xe71(%rip),%rdi
mov    %r14,%rsi
mov    %r15,%rdx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
add    $0x150,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [9 x i8] c"fname1: \00"
@.str.1 = [6 x i8] c"%[^\0A]\00"
@.str.2 = [9 x i8] c"sname1: \00"
@.str.3 = [3 x i8] c"%s\00"
@.str.4 = [11 x i8] c"fullname: \00"
@.str.5 = [7 x i8] c" %[^\0A]\00"
@.str.6 = [15 x i8] c"\0A** Output **\0A\00"
@.str.7 = [7 x i8] c"%s %s\0A\00"
@.str.8 = [4 x i8] c"%s\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [100 x i8]
%3 = alloca [100 x i8]
%4 = alloca [100 x i8]
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0))
%6 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%7 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i8* %6)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0))
%9 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* %9)
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0))
%12 = getelementptr inbounds [100 x i8], [100 x i8]* %4, i64 0, i64 0
%13 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i8* %12)
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.6, i64 0, i64 0))
%15 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%16 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i64 0, i64 0), i8* %15, i8* %16)
%18 = getelementptr inbounds [100 x i8], [100 x i8]* %4, i64 0, i64 0
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0), i8* %18)
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"fname1: \00"
@.str.1 = [6 x i8] c"%[^\0A]\00"
@.str.2 = [9 x i8] c"sname1: \00"
@.str.3 = [3 x i8] c"%s\00"
@.str.4 = [11 x i8] c"fullname: \00"
@.str.5 = [7 x i8] c" %[^\0A]\00"
@.str.7 = [7 x i8] c"%s %s\0A\00"
@str = [14 x i8] c"\0A** Output **\00"
define i32 @main() {
%1 = alloca [100 x i8]
%2 = alloca [100 x i8]
%3 = alloca [100 x i8]
%4 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%5 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%6 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i8* %4)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* %5)
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0))
%12 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i8* %6)
%13 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i64 0, i64 0), i8* %4, i8* %5)
%15 = call i32 @puts(i8* %6)
ret i32 0
}