#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 *alloca(int);
int test_fun(int i, int j) {
  int *i_ref = alloca(sizeof(int));
  int *j_ref = alloca(sizeof(int));
  int *c = alloca(sizeof(int));
  *i_ref = i;
  *j_ref = j;
  *c = 0;
  while (*i_ref >= 0) {
    *j_ref = 0;
    while (*j_ref <= *i_ref - 1) {
      *j_ref = *j_ref + 1;
      *c = *c + 1;
    }
    *i_ref = *i_ref - 1;
  }
  return *c;
}


x86 assembly (clang, -O0):
<test_fun>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %esi,-0x8(%rbp)
mov    $0x4,%edi
call   1030 <alloca@plt>
mov    %rax,-0x10(%rbp)
mov    $0x4,%edi
call   1030 <alloca@plt>
mov    %rax,-0x18(%rbp)
mov    $0x4,%edi
call   1030 <alloca@plt>
mov    %rax,-0x20(%rbp)
mov    -0x4(%rbp),%ecx
mov    -0x10(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x8(%rbp),%ecx
mov    -0x18(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x20(%rbp),%rax
movl   $0x0,(%rax)
mov    -0x10(%rbp),%rax
cmpl   $0x0,(%rax)
jl     11c9 <test_fun+0xb9>
mov    -0x18(%rbp),%rax
movl   $0x0,(%rax)
mov    -0x18(%rbp),%rax
mov    (%rax),%eax
mov    -0x10(%rbp),%rcx
mov    (%rcx),%ecx
sub    $0x1,%ecx
cmp    %ecx,%eax
jg     11b5 <test_fun+0xa5>
mov    -0x18(%rbp),%rax
mov    (%rax),%ecx
add    $0x1,%ecx
mov    -0x18(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x20(%rbp),%rax
mov    (%rax),%ecx
add    $0x1,%ecx
mov    -0x20(%rbp),%rax
mov    %ecx,(%rax)
jmp    117b <test_fun+0x6b>
mov    -0x10(%rbp),%rax
mov    (%rax),%ecx
sub    $0x1,%ecx
mov    -0x10(%rbp),%rax
mov    %ecx,(%rax)
jmp    1164 <test_fun+0x54>
mov    -0x20(%rbp),%rax
mov    (%rax),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<test_fun>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %esi,%r15d
mov    %edi,%ebp
mov    $0x4,%edi
call   1030 <alloca@plt>
mov    %rax,%r14
mov    $0x4,%edi
call   1030 <alloca@plt>
mov    %rax,%rbx
mov    $0x4,%edi
call   1030 <alloca@plt>
mov    %ebp,(%r14)
mov    %r15d,(%rbx)
movl   $0x0,(%rax)
cmpl   $0x0,(%r14)
js     118d <test_fun+0x7d>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
movl   $0x0,(%rbx)
mov    (%r14),%ecx
test   %ecx,%ecx
jle    1191 <test_fun+0x81>
xor    %ecx,%ecx
nop
add    $0x1,%ecx
mov    %ecx,(%rbx)
addl   $0x1,(%rax)
mov    (%rbx),%ecx
mov    (%r14),%edx
cmp    %edx,%ecx
jl     1170 <test_fun+0x60>
lea    -0x1(%rdx),%ecx
mov    %ecx,(%r14)
test   %edx,%edx
jg     1160 <test_fun+0x50>
jmp    1197 <test_fun+0x87>
xor    %eax,%eax
jmp    1199 <test_fun+0x89>
add    $0xffffffff,%ecx
mov    %ecx,(%r14)
mov    (%rax),%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
define i32 @test_fun(i32 %0, i32 %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32*
%6 = alloca i32*
%7 = alloca i32*
store i32 %0, i32* %3
store i32 %1, i32* %4
%8 = call i32* @alloca(i32 4)
store i32* %8, i32** %5
%9 = call i32* @alloca(i32 4)
store i32* %9, i32** %6
%10 = call i32* @alloca(i32 4)
store i32* %10, i32** %7
%11 = load i32, i32* %3
%12 = load i32*, i32** %5
store i32 %11, i32* %12
%13 = load i32, i32* %4
%14 = load i32*, i32** %6
store i32 %13, i32* %14
%15 = load i32*, i32** %7
store i32 0, i32* %15
br label %16
16: ; preds = %38, %2
%17 = load i32*, i32** %5
%18 = load i32, i32* %17
%19 = icmp sge i32 %18, 0
br i1 %19, label %20, label %43
20: ; preds = %16
%21 = load i32*, i32** %6
store i32 0, i32* %21
br label %22
22: ; preds = %29, %20
%23 = load i32*, i32** %6
%24 = load i32, i32* %23
%25 = load i32*, i32** %5
%26 = load i32, i32* %25
%27 = sub nsw i32 %26, 1
%28 = icmp sle i32 %24, %27
br i1 %28, label %29, label %38
29: ; preds = %22
%30 = load i32*, i32** %6
%31 = load i32, i32* %30
%32 = add nsw i32 %31, 1
%33 = load i32*, i32** %6
store i32 %32, i32* %33
%34 = load i32*, i32** %7
%35 = load i32, i32* %34
%36 = add nsw i32 %35, 1
%37 = load i32*, i32** %7
store i32 %36, i32* %37
br label %22
38: ; preds = %22
%39 = load i32*, i32** %5
%40 = load i32, i32* %39
%41 = sub nsw i32 %40, 1
%42 = load i32*, i32** %5
store i32 %41, i32* %42
br label %16
43: ; preds = %16
%44 = load i32*, i32** %7
%45 = load i32, i32* %44
ret i32 %45
}

LLVM IR (-O2):
define i32 @test_fun(i32 %0, i32 %1) {
%3 = tail call i32* @alloca(i32 4)
%4 = tail call i32* @alloca(i32 4)
%5 = tail call i32* @alloca(i32 4)
store i32 %0, i32* %3
store i32 %1, i32* %4
store i32 0, i32* %5
%6 = load i32, i32* %3
%7 = icmp sgt i32 %6, -1
br i1 %7, label %8, label %26
8: ; preds = %2, %21
store i32 0, i32* %4
%9 = load i32, i32* %3
%10 = icmp sgt i32 %9, 0
br i1 %10, label %13, label %11
11: ; preds = %8
%12 = add nsw i32 %9, -1
store i32 %12, i32* %3
br label %24
13: ; preds = %8, %13
%14 = phi i32 [ %18, %13 ], [ 0, %8 ]
%15 = add nsw i32 %14, 1
store i32 %15, i32* %4
%16 = load i32, i32* %5
%17 = add nsw i32 %16, 1
store i32 %17, i32* %5
%18 = load i32, i32* %4
%19 = load i32, i32* %3
%20 = icmp slt i32 %18, %19
br i1 %20, label %13, label %21
21: ; preds = %13
%22 = add nsw i32 %19, -1
store i32 %22, i32* %3
%23 = icmp sgt i32 %19, 0
br i1 %23, label %8, label %24
24: ; preds = %21, %11
%25 = load i32, i32* %5
br label %26
26: ; preds = %24, %2
%27 = phi i32 [ %25, %24 ], [ 0, %2 ]
ret i32 %27
}