#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 main(void) {
  printf("  n  tri(n)\n");
  printf("---- ------\n");
  for (int i = 5; i <= 50; i += 5) {
    printf(" %-2d   %-4d \n", i, ((i * (i + 1)) / 2));
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeda(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x5,-0x8(%rbp)
cmpl   $0x32,-0x8(%rbp)
jg     1181 <main+0x71>
mov    -0x8(%rbp),%esi
mov    -0x8(%rbp),%eax
mov    -0x8(%rbp),%ecx
add    $0x1,%ecx
imul   %ecx,%eax
mov    $0x2,%ecx
cltd
idiv   %ecx
mov    %eax,%edx
lea    0xeae(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x5,%eax
mov    %eax,-0x8(%rbp)
jmp    1142 <main+0x32>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xee7(%rip),%rdi
call   1030 <puts@plt>
lea    0xee7(%rip),%rdi
call   1030 <puts@plt>
lea    0xec0(%rip),%rbx
mov    %rbx,%rdi
mov    $0x5,%esi
mov    $0xf,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0xa,%esi
mov    $0x37,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0xf,%esi
mov    $0x78,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x14,%esi
mov    $0xd2,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x19,%esi
mov    $0x145,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x1e,%esi
mov    $0x1d1,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x23,%esi
mov    $0x276,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x28,%esi
mov    $0x334,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x2d,%esi
mov    $0x40b,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x32,%esi
mov    $0x4fb,%edx
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [13 x i8] c" n tri(n)\0A\00"
@.str.1 = [13 x i8] c"---- ------\0A\00"
@.str.2 = [15 x i8] c" %-2d %-4d \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0))
store i32 5, i32* %2
br label %5
5: ; preds = %16, %0
%6 = load i32, i32* %2
%7 = icmp sle i32 %6, 50
br i1 %7, label %8, label %19
8: ; preds = %5
%9 = load i32, i32* %2
%10 = load i32, i32* %2
%11 = load i32, i32* %2
%12 = add nsw i32 %11, 1
%13 = mul nsw i32 %10, %12
%14 = sdiv i32 %13, 2
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 %9, i32 %14)
br label %16
16: ; preds = %8
%17 = load i32, i32* %2
%18 = add nsw i32 %17, 5
store i32 %18, i32* %2
br label %5
19: ; preds = %5
ret i32 0
}

LLVM IR (-O2):
@.str.2 = [15 x i8] c" %-2d %-4d \0A\00"
@str = [12 x i8] c" n tri(n)\00"
@str.3 = [12 x i8] c"---- ------\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str.3, i64 0, i64 0))
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 5, i32 15)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 10, i32 55)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 15, i32 120)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 20, i32 210)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 25, i32 325)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 30, i32 465)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 35, i32 630)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 40, i32 820)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 45, i32 1035)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i32 50, i32 1275)
ret i32 0
}