#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);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int a, b, sum;
  sum = 0;
  scanf("%i", &a);
  if (a < 0)
    a = 0;
  while (a > 0) {
    scanf("%i", &b);
    sum = sum + b;
    a = a - 1;
  }
  printf("%d", sum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
lea    0xec3(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,-0x8(%rbp)
jge    1157 <main+0x37>
movl   $0x0,-0x8(%rbp)
jmp    115c <main+0x3c>
cmpl   $0x0,-0x8(%rbp)
jle    118d <main+0x6d>
lea    0xe93(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x10(%rbp),%eax
add    -0xc(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%eax
sub    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    115c <main+0x3c>
mov    -0x10(%rbp),%esi
lea    0xe6c(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xed0(%rip),%rdi
lea    0x8(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x8(%rsp),%eax
test   %eax,%eax
js     1181 <main+0x61>
je     1189 <main+0x69>
xor    %ebx,%ebx
lea    0xeb3(%rip),%r14
lea    0xc(%rsp),%r15
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    %r14,%rdi
mov    %r15,%rsi
call   1040 <scanf@plt>
add    0xc(%rsp),%ebx
mov    0x8(%rsp),%eax
lea    -0x1(%rax),%ecx
mov    %ecx,0x8(%rsp)
cmp    $0x1,%eax
jg     1160 <main+0x40>
jmp    118b <main+0x6b>
movl   $0x0,0x8(%rsp)
xor    %ebx,%ebx
lea    0xe71(%rip),%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

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

LLVM IR (-O2):
@.str = [3 x i8] c"%i\00"
@.str.1 = [3 x i8] c"%d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%6 = load i32, i32* %1
%7 = icmp slt i32 %6, 0
br i1 %7, label %8, label %9
8: ; preds = %0
store i32 0, i32* %1
br label %19
9: ; preds = %0
%10 = icmp eq i32 %6, 0
br i1 %10, label %19, label %11
11: ; preds = %9, %11
%12 = phi i32 [ %15, %11 ], [ 0, %9 ]
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
%14 = load i32, i32* %2
%15 = add nsw i32 %14, %12
%16 = load i32, i32* %1
%17 = add nsw i32 %16, -1
store i32 %17, i32* %1
%18 = icmp sgt i32 %16, 1
br i1 %18, label %11, label %19
19: ; preds = %11, %8, %9
%20 = phi i32 [ 0, %9 ], [ 0, %8 ], [ %15, %11 ]
%21 = call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32 %20)
ret i32 0
}