#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 *);
void print_screen(char screen[50][50]) {
  int i, j;
  for (i = 0; i < 50; i++) {
    for (j = 0; j < 50; j++) {
      if (screen[i][j] == 'x')
        printf("x");
      else
        printf(" ");
    }
    printf("\n");
  }
}


x86 assembly (clang, -O0):
<print_screen>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
cmpl   $0x32,-0xc(%rbp)
jge    11a8 <print_screen+0x98>
movl   $0x0,-0x10(%rbp)
cmpl   $0x32,-0x10(%rbp)
jge    118e <print_screen+0x7e>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
imul   $0x32,%rcx,%rcx
add    %rcx,%rax
movslq -0x10(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x78,%eax
jne    116f <print_screen+0x5f>
lea    0xe9b(%rip),%rdi
call   1030 <printf@plt>
jmp    117b <print_screen+0x6b>
lea    0xe8c(%rip),%rdi
call   1030 <printf@plt>
jmp    1180 <print_screen+0x70>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    1134 <print_screen+0x24>
lea    0xe6f(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1123 <print_screen+0x13>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_screen>:
push   %r15
push   %r14
push   %rbx
mov    %rdi,%r15
xor    %r14d,%r14d
jmp    1138 <print_screen+0x28>
nopl   (%rax)
mov    $0xa,%edi
call   1030 <putchar@plt>
add    $0x1,%r14
add    $0x32,%r15
cmp    $0x32,%r14
je     116e <print_screen+0x5e>
mov    $0xffffffffffffffce,%rbx
jmp    115a <print_screen+0x4a>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
call   1030 <putchar@plt>
inc    %rbx
je     1120 <print_screen+0x10>
cmpb   $0x78,0x32(%r15,%rbx,1)
mov    $0x78,%edi
je     1150 <print_screen+0x40>
mov    $0x20,%edi
jmp    1150 <print_screen+0x40>
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [2 x i8] c"x\00"
@.str.1 = [2 x i8] c" \00"
@.str.2 = [2 x i8] c"\0A\00"
define void @print_screen([50 x i8]* %0) {
%2 = alloca [50 x i8]*
%3 = alloca i32
%4 = alloca i32
store [50 x i8]* %0, [50 x i8]** %2
store i32 0, i32* %3
br label %5
5: ; preds = %33, %1
%6 = load i32, i32* %3
%7 = icmp slt i32 %6, 50
br i1 %7, label %8, label %36
8: ; preds = %5
store i32 0, i32* %4
br label %9
9: ; preds = %28, %8
%10 = load i32, i32* %4
%11 = icmp slt i32 %10, 50
br i1 %11, label %12, label %31
12: ; preds = %9
%13 = load [50 x i8]*, [50 x i8]** %2
%14 = load i32, i32* %3
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds [50 x i8], [50 x i8]* %13, i64 %15
%17 = load i32, i32* %4
%18 = sext i32 %17 to i64
%19 = getelementptr inbounds [50 x i8], [50 x i8]* %16, i64 0, i64 %18
%20 = load i8, i8* %19
%21 = sext i8 %20 to i32
%22 = icmp eq i32 %21, 120
br i1 %22, label %23, label %25
23: ; preds = %12
%24 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
br label %27
25: ; preds = %12
%26 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %27
27: ; preds = %25, %23
br label %28
28: ; preds = %27
%29 = load i32, i32* %4
%30 = add nsw i32 %29, 1
store i32 %30, i32* %4
br label %9
31: ; preds = %9
%32 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %33
33: ; preds = %31
%34 = load i32, i32* %3
%35 = add nsw i32 %34, 1
store i32 %35, i32* %3
br label %5
36: ; preds = %5
ret void
}

LLVM IR (-O2):
define void @print_screen([50 x i8]* nocapture %0) {
br label %2
2: ; preds = %1, %13
%3 = phi i64 [ 0, %1 ], [ %15, %13 ]
br label %4
4: ; preds = %2, %4
%5 = phi i64 [ 0, %2 ], [ %11, %4 ]
%6 = getelementptr inbounds [50 x i8], [50 x i8]* %0, i64 %3, i64 %5
%7 = load i8, i8* %6
%8 = icmp eq i8 %7, 120
%9 = select i1 %8, i32 120, i32 32
%10 = tail call i32 @putchar(i32 %9)
%11 = add nuw nsw i64 %5, 1
%12 = icmp eq i64 %11, 50
br i1 %12, label %13, label %4
13: ; preds = %4
%14 = tail call i32 @putchar(i32 10)
%15 = add nuw nsw i64 %3, 1
%16 = icmp eq i64 %15, 50
br i1 %16, label %17, label %2
17: ; preds = %13
ret void
}