#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 uint16_t;

/* Variables and functions */
int atoi(char *);
int /*<<< orphan*/ printf(char *, int);
int main(int argc, char **argv) {
  for (int i = 1; i < argc; i++) {
    uint16_t x = atoi(argv[i]);
    printf("x is %hu (mod 65536)\n", x);
    uint16_t x_squared = x * x;
    printf("x*x is %hu (mod 65536)\n\n", x_squared);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movl   $0x1,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1193 <main+0x73>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdi
call   1040 <atoi@plt>
mov    %eax,-0x18(%rbp)
mov    -0x18(%rbp),%esi
lea    0xe99(%rip),%rdi
call   1030 <printf@plt>
mov    -0x18(%rbp),%eax
imul   -0x18(%rbp),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x1c(%rbp),%esi
lea    0xe96(%rip),%rdi
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    113d <main+0x1d>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
cmp    $0x2,%edi
jl     117b <main+0x5b>
mov    %rsi,%r12
mov    %edi,%r13d
mov    $0x1,%ebx
lea    0xebe(%rip),%r14
lea    0xecd(%rip),%r15
nopl   0x0(%rax)
mov    (%r12,%rbx,8),%rdi
call   1040 <atoi@plt>
mov    %eax,%ebp
mov    %r14,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
imul   %ebp,%ebp
mov    %r15,%rdi
mov    %ebp,%esi
call   1030 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%r13
jne    1150 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [22 x i8] c"x is %hu (mod 65536)\0A\00"
@.str.1 = [25 x i8] c"x*x is %hu (mod 65536)\0A\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 1, i32* %6
br label %9
9: ; preds = %27, %2
%10 = load i32, i32* %6
%11 = load i32, i32* %4
%12 = icmp slt i32 %10, %11
br i1 %12, label %13, label %30
13: ; preds = %9
%14 = load i8**, i8*** %5
%15 = load i32, i32* %6
%16 = sext i32 %15 to i64
%17 = getelementptr inbounds i8*, i8** %14, i64 %16
%18 = load i8*, i8** %17
%19 = call i32 @atoi(i8* %18)
store i32 %19, i32* %7
%20 = load i32, i32* %7
%21 = call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i32 %20)
%22 = load i32, i32* %7
%23 = load i32, i32* %7
%24 = mul nsw i32 %22, %23
store i32 %24, i32* %8
%25 = load i32, i32* %8
%26 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0), i32 %25)
br label %27
27: ; preds = %13
%28 = load i32, i32* %6
%29 = add nsw i32 %28, 1
store i32 %29, i32* %6
br label %9
30: ; preds = %9
ret i32 0
}

LLVM IR (-O2):
@.str = [22 x i8] c"x is %hu (mod 65536)\0A\00"
@.str.1 = [25 x i8] c"x*x is %hu (mod 65536)\0A\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp sgt i32 %0, 1
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = zext i32 %0 to i64
br label %7
6: ; preds = %7, %2
ret i32 0
7: ; preds = %4, %7
%8 = phi i64 [ 1, %4 ], [ %15, %7 ]
%9 = getelementptr inbounds i8*, i8** %1, i64 %8
%10 = load i8*, i8** %9
%11 = tail call i32 @atoi(i8* %10)
%12 = tail call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i32 %11)
%13 = mul nsw i32 %11, %11
%14 = tail call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0), i32 %13)
%15 = add nuw nsw i64 %8, 1
%16 = icmp eq i64 %15, %5
br i1 %16, label %6, label %7
}