#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*/ write_src(char *);
void subret_handler(void) {
  write_src("if(callstack_pointer > 0)\n");
  write_src("{\n");
  write_src("JUMP(callstack[--callstack_pointer]);\n");
  write_src("}\n");
  write_src("else\n");
  write_src("ERROR(\"call stack underflow\");\n");
}


x86 assembly (clang, -O0):
<subret_handler>:
push   %rbp
mov    %rsp,%rbp
lea    0xee5(%rip),%rdi
call   1030 <write_src@plt>
lea    0xef4(%rip),%rdi
call   1030 <write_src@plt>
lea    0xeeb(%rip),%rdi
call   1030 <write_src@plt>
lea    0xf06(%rip),%rdi
call   1030 <write_src@plt>
lea    0xefd(%rip),%rdi
call   1030 <write_src@plt>
lea    0xef7(%rip),%rdi
call   1030 <write_src@plt>
pop    %rbp
ret

x86 assembly (clang, -O2):
<subret_handler>:
push   %rax
lea    0xee8(%rip),%rdi
call   1030 <write_src@plt>
lea    0xef7(%rip),%rdi
call   1030 <write_src@plt>
lea    0xeee(%rip),%rdi
call   1030 <write_src@plt>
lea    0xf09(%rip),%rdi
call   1030 <write_src@plt>
lea    0xf00(%rip),%rdi
call   1030 <write_src@plt>
lea    0xefa(%rip),%rdi
pop    %rax
jmp    1030 <write_src@plt>

LLVM IR (-O0):
@.str = [27 x i8] c"if(callstack_pointer > 0)\0A\00"
@.str.1 = [3 x i8] c"{\0A\00"
@.str.2 = [39 x i8] c"JUMP(callstack[--callstack_pointer]);\0A\00"
@.str.3 = [3 x i8] c"}\0A\00"
@.str.4 = [6 x i8] c"else\0A\00"
@.str.5 = [32 x i8] c"ERROR(\22call stack underflow\22);\0A\00"
define void @subret_handler() {
%1 = call i32 @write_src(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0))
%2 = call i32 @write_src(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%3 = call i32 @write_src(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @write_src(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%5 = call i32 @write_src(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0))
%6 = call i32 @write_src(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.5, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str = [27 x i8] c"if(callstack_pointer > 0)\0A\00"
@.str.1 = [3 x i8] c"{\0A\00"
@.str.2 = [39 x i8] c"JUMP(callstack[--callstack_pointer]);\0A\00"
@.str.3 = [3 x i8] c"}\0A\00"
@.str.4 = [6 x i8] c"else\0A\00"
@.str.5 = [32 x i8] c"ERROR(\22call stack underflow\22);\0A\00"
define void @subret_handler() {
%1 = tail call i32 @write_src(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0))
%2 = tail call i32 @write_src(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%3 = tail call i32 @write_src(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.2, i64 0, i64 0))
%4 = tail call i32 @write_src(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%5 = tail call i32 @write_src(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0))
%6 = tail call i32 @write_src(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.5, i64 0, i64 0))
ret void
}