#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*/ stack_print(long, int);
int huge_stack_test() {
  printf("===================================================");
  printf("\n");
  printf("huge_stack test: start");
  printf("\n");
  register long int rsp asm("sp");
  stack_print(rsp, 10);
  printf("huge_stack test: end");
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<huge_stack_test>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
call   1030 <printf@plt>
lea    0xef9(%rip),%rdi
call   1030 <printf@plt>
lea    0xeef(%rip),%rdi
call   1030 <printf@plt>
lea    0xee1(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%rdi
mov    $0xa,%esi
call   1040 <stack_print@plt>
lea    0xee0(%rip),%rdi
call   1030 <printf@plt>
lea    0xebb(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<huge_stack_test>:
push   %rax
lea    0xec8(%rip),%rdi
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xee6(%rip),%rdi
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0xa,%esi
call   1050 <stack_print@plt>
lea    0xedd(%rip),%rdi
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [52 x i8] c"===================================================\00"
@.str.1 = [2 x i8] c"\0A\00"
@.str.2 = [23 x i8] c"huge_stack test: start\00"
@.str.3 = [21 x i8] c"huge_stack test: end\00"
define i32 @huge_stack_test() {
%1 = alloca i64
%2 = call i32 @printf(i8* getelementptr inbounds ([52 x i8], [52 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%6 = load i64, i64* %1
%7 = call i32 @stack_print(i64 %6, i32 10)
%8 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.3, i64 0, i64 0))
%9 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [52 x i8] c"===================================================\00"
@.str.2 = [23 x i8] c"huge_stack test: start\00"
@.str.3 = [21 x i8] c"huge_stack test: end\00"
define i32 @huge_stack_test() {
%1 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([52 x i8], [52 x i8]* @.str, i64 0, i64 0))
%2 = tail call i32 @putchar(i32 10)
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0))
%4 = tail call i32 @putchar(i32 10)
%5 = tail call i32 @stack_print(i64 undef, i32 10)
%6 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.3, i64 0, i64 0))
%7 = tail call i32 @putchar(i32 10)
ret i32 0
}