#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 /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int sum = 0;
  int current;
  do {
    printf("\nEnter an integer > ");
    scanf("%d", &current);
    if (current > 0)
      sum = sum + current;
  } while (current > 0);
  printf("\nThe sum is %d\n", sum);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeca(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,-0xc(%rbp)
jle    1167 <main+0x47>
mov    -0x8(%rbp),%eax
add    -0xc(%rbp),%eax
mov    %eax,-0x8(%rbp)
jmp    116c <main+0x4c>
cmpl   $0x0,-0xc(%rbp)
jg     1136 <main+0x16>
mov    -0x8(%rbp),%esi
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xed1(%rip),%r14
lea    0xedf(%rip),%r15
lea    0x4(%rsp),%r12
xor    %eax,%eax
nopl   (%rax)
mov    %eax,%ebx
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %r12,%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%ecx
lea    (%rcx,%rbx,1),%eax
test   %ecx,%ecx
jg     1140 <main+0x20>
lea    0xeaf(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

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

LLVM IR (-O2):
@.str = [21 x i8] c"\0AEnter an integer > \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [16 x i8] c"\0AThe sum is %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
br label %3
3: ; preds = %3, %0
%4 = phi i32 [ 0, %0 ], [ %9, %3 ]
%5 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%7 = load i32, i32* %1
%8 = icmp sgt i32 %7, 0
%9 = add nsw i32 %7, %4
br i1 %8, label %3, label %10
10: ; preds = %3
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0), i32 %4)
ret i32 0
}