#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 EXIT_SUCCESS;
int eval(char, int, int);
int /*<<< orphan*/ initialize_op();
int /*<<< orphan*/ printf(char *, int);
int main(void) {
  initialize_op();
  printf("%d\n", eval('+', 10, 20));
  printf("%d\n", eval('-', 10, 20));
  printf("%d\n", eval('*', 10, 20));
  return (EXIT_SUCCESS);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    $0x0,%al
call   1040 <initialize_op@plt>
mov    $0x2b,%edi
mov    $0xa,%esi
mov    $0x14,%edx
call   1050 <eval@plt>
mov    %eax,%esi
lea    0xe9d(%rip),%rdi
call   1030 <printf@plt>
mov    $0x2d,%edi
mov    $0xa,%esi
mov    $0x14,%edx
call   1050 <eval@plt>
mov    %eax,%esi
lea    0xe7b(%rip),%rdi
call   1030 <printf@plt>
mov    $0x2a,%edi
mov    $0xa,%esi
mov    $0x14,%edx
call   1050 <eval@plt>
mov    %eax,%esi
lea    0xe59(%rip),%rdi
call   1030 <printf@plt>
mov    0x2e2d(%rip),%rax
mov    (%rax),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
xor    %eax,%eax
call   1040 <initialize_op@plt>
mov    $0x2b,%edi
mov    $0xa,%esi
mov    $0x14,%edx
call   1050 <eval@plt>
lea    0xead(%rip),%rbx
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x2d,%edi
mov    $0xa,%esi
mov    $0x14,%edx
call   1050 <eval@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    $0x2a,%edi
mov    $0xa,%esi
mov    $0x14,%edx
call   1050 <eval@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    0x2e40(%rip),%rax
mov    (%rax),%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%d\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca i32
store i32 0, i32* %1
%2 = call i32 (...) @initialize_op()
%3 = call i32 @eval(i8 signext 43, i32 10, i32 20)
%4 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %3)
%5 = call i32 @eval(i8 signext 45, i32 10, i32 20)
%6 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %5)
%7 = call i32 @eval(i8 signext 42, i32 10, i32 20)
%8 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = load i32, i32* @EXIT_SUCCESS
ret i32 %9
}

LLVM IR (-O2):
@.str = [4 x i8] c"%d\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = tail call i32 (...) @initialize_op()
%2 = tail call i32 @eval(i8 signext 43, i32 10, i32 20)
%3 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %2)
%4 = tail call i32 @eval(i8 signext 45, i32 10, i32 20)
%5 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %4)
%6 = tail call i32 @eval(i8 signext 42, i32 10, i32 20)
%7 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %6)
%8 = load i32, i32* @EXIT_SUCCESS
ret i32 %8
}