#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 concatenation(char letter[], int n, int returnAtTheEndOfLine) {
  int i = 0;
  while (i < n) {
    printf("%s", letter);
    i++;
  }
  if (returnAtTheEndOfLine == 1)
    printf("\n");
}


x86 assembly (clang, -O0):
<concatenation>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    %edx,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1155 <concatenation+0x45>
mov    -0x8(%rbp),%rsi
lea    0xec0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1129 <concatenation+0x19>
cmpl   $0x1,-0x10(%rbp)
jne    116d <concatenation+0x5d>
lea    0xe9d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<concatenation>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %edx,%r14d
test   %esi,%esi
jle    1152 <concatenation+0x32>
mov    %esi,%ebp
mov    %rdi,%rbx
lea    0xec6(%rip),%r15
nopw   0x0(%rax,%rax,1)
mov    %r15,%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0xffffffff,%ebp
jne    1140 <concatenation+0x20>
cmp    $0x1,%r14d
jne    116c <concatenation+0x4c>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <putchar@plt>
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%s\00"
@.str.1 = [2 x i8] c"\0A\00"
define void @concatenation(i8* %0, i32 %1, i32 %2) {
%4 = alloca i8*
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
store i8* %0, i8** %4
store i32 %1, i32* %5
store i32 %2, i32* %6
store i32 0, i32* %7
br label %8
8: ; preds = %12, %3
%9 = load i32, i32* %7
%10 = load i32, i32* %5
%11 = icmp slt i32 %9, %10
br i1 %11, label %12, label %17
12: ; preds = %8
%13 = load i8*, i8** %4
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %13)
%15 = load i32, i32* %7
%16 = add nsw i32 %15, 1
store i32 %16, i32* %7
br label %8
17: ; preds = %8
%18 = load i32, i32* %6
%19 = icmp eq i32 %18, 1
br i1 %19, label %20, label %22
20: ; preds = %17
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %22
22: ; preds = %20, %17
ret void
}

LLVM IR (-O2):
@.str = [3 x i8] c"%s\00"
define void @concatenation(i8* %0, i32 %1, i32 %2) {
%4 = icmp sgt i32 %1, 0
br i1 %4, label %5, label %10
5: ; preds = %3, %5
%6 = phi i32 [ %8, %5 ], [ 0, %3 ]
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %0)
%8 = add nuw nsw i32 %6, 1
%9 = icmp eq i32 %8, %1
br i1 %9, label %10, label %5
10: ; preds = %5, %3
%11 = icmp eq i32 %2, 1
br i1 %11, label %12, label %14
12: ; preds = %10
%13 = tail call i32 @putchar(i32 10)
br label %14
14: ; preds = %12, %10
ret void
}