#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 scanf(char *, long *);
int main(void) {
  long num;
  long sum = 0L;
  int status;
  printf("Please enter an integer to be summed (q to quit):");
  while (scanf("%ld", &num) == 1) {
    sum = sum + num;
    printf("Please enter next integer (q to quit):");
  }
  printf("Those integers sum to %ld.\n", sum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movq   $0x0,-0x18(%rbp)
lea    0xec2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xee6(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
cmp    $0x1,%eax
jne    117d <main+0x5d>
mov    -0x18(%rbp),%rax
add    -0x10(%rbp),%rax
mov    %rax,-0x18(%rbp)
lea    0xec5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1145 <main+0x25>
mov    -0x18(%rbp),%rsi
lea    0xed5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xed1(%rip),%rdi
xor    %ebx,%ebx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xef3(%rip),%rdi
mov    %rsp,%rsi
call   1040 <scanf@plt>
cmp    $0x1,%eax
jne    117e <main+0x5e>
lea    0xee3(%rip),%r14
lea    0xed8(%rip),%r15
mov    %rsp,%r12
xor    %ebx,%ebx
nop
add    (%rsp),%rbx
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %r12,%rsi
call   1040 <scanf@plt>
cmp    $0x1,%eax
je     1160 <main+0x40>
lea    0xed8(%rip),%rdi
mov    %rbx,%rsi
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 = [50 x i8] c"Please enter an integer to be summed (q to quit):\00"
@.str.1 = [4 x i8] c"%ld\00"
@.str.2 = [39 x i8] c"Please enter next integer (q to quit):\00"
@.str.3 = [28 x i8] c"Those integers sum to %ld.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i64
%3 = alloca i64
%4 = alloca i32
store i32 0, i32* %1
store i64 0, i64* %3
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([50 x i8], [50 x i8]* @.str, i64 0, i64 0))
br label %6
6: ; preds = %9, %0
%7 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i64* %2)
%8 = icmp eq i32 %7, 1
br i1 %8, label %9, label %14
9: ; preds = %6
%10 = load i64, i64* %3
%11 = load i64, i64* %2
%12 = add nsw i64 %10, %11
store i64 %12, i64* %3
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.2, i64 0, i64 0))
br label %6
14: ; preds = %6
%15 = load i64, i64* %3
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.3, i64 0, i64 0), i64 %15)
ret i32 0
}

LLVM IR (-O2):
@.str = [50 x i8] c"Please enter an integer to be summed (q to quit):\00"
@.str.1 = [4 x i8] c"%ld\00"
@.str.2 = [39 x i8] c"Please enter next integer (q to quit):\00"
@.str.3 = [28 x i8] c"Those integers sum to %ld.\0A\00"
define i32 @main() {
%1 = alloca i64
%2 = bitcast i64* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([50 x i8], [50 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i64* %1)
%5 = icmp eq i32 %4, 1
br i1 %5, label %6, label %13
6: ; preds = %0, %6
%7 = phi i64 [ %9, %6 ], [ 0, %0 ]
%8 = load i64, i64* %1
%9 = add nsw i64 %8, %7
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([39 x i8], [39 x i8]* @.str.2, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i64* %1)
%12 = icmp eq i32 %11, 1
br i1 %12, label %6, label %13
13: ; preds = %6, %0
%14 = phi i64 [ 0, %0 ], [ %9, %6 ]
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @.str.3, i64 0, i64 0), i64 %14)
ret i32 0
}