#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 menu();
int /*<<< orphan*/ printf(char *);
int main(void) {
  switch (menu()) {
  case 1:
    printf("Starting...\n");
    break;
  case 2:
    printf("Menu Program -- ver. 1.00\n");
    break;
  case 3:
    printf("No help available\n");
    break;
  case 4:
    printf("Have a nice day!\n");
    break;
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
xor    %eax,%eax
call   1030 <menu@plt>
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0x3,%eax
ja     119b <main+0x7b>
mov    -0x10(%rbp),%rax
lea    0xead(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xead(%rip),%rdi
call   1040 <printf@plt>
jmp    119b <main+0x7b>
lea    0xea9(%rip),%rdi
call   1040 <printf@plt>
jmp    119b <main+0x7b>
lea    0xeb3(%rip),%rdi
call   1040 <printf@plt>
jmp    119b <main+0x7b>
lea    0xeb5(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
xor    %eax,%eax
call   1040 <menu@plt>
add    $0xffffffff,%eax
cmp    $0x3,%eax
ja     1145 <main+0x25>
cltq
lea    0xf13(%rip),%rcx
movslq (%rcx,%rax,4),%rdi
add    %rcx,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [13 x i8] c"Starting...\0A\00"
@.str.1 = [27 x i8] c"Menu Program -- ver. 1.00\0A\00"
@.str.2 = [19 x i8] c"No help available\0A\00"
@.str.3 = [18 x i8] c"Have a nice day!\0A\00"
define i32 @main() {
%1 = alloca i32
store i32 0, i32* %1
%2 = call i32 (...) @menu()
switch i32 %2, label %11 [
i32 1, label %3
i32 2, label %5
i32 3, label %7
i32 4, label %9
]
3: ; preds = %0
%4 = call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
br label %11
5: ; preds = %0
%6 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0))
br label %11
7: ; preds = %0
%8 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0))
br label %11
9: ; preds = %0
%10 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.3, i64 0, i64 0))
br label %11
11: ; preds = %0, %9, %7, %5, %3
ret i32 0
}

LLVM IR (-O2):
@str = [17 x i8] c"Have a nice day!\00"
@str.4 = [18 x i8] c"No help available\00"
@str.5 = [26 x i8] c"Menu Program -- ver. 1.00\00"
@str.6 = [12 x i8] c"Starting...\00"
@reltable.main = [4 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @str.6 to i64), i64 ptrtoint ([4 x i32]* @reltable.main to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([26 x i8]* @str.5 to i64), i64 ptrtoint ([4 x i32]* @reltable.main to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([18 x i8]* @str.4 to i64), i64 ptrtoint ([4 x i32]* @reltable.main to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @str to i64), i64 ptrtoint ([4 x i32]* @reltable.main to i64)) to i32)]
define i32 @main() {
%1 = tail call i32 (...) @menu()
%2 = add i32 %1, -1
%3 = icmp ult i32 %2, 4
br i1 %3, label %4, label %9
4: ; preds = %0
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([4 x i32]* @reltable.main to i8*), i64 %6)
%8 = tail call i32 @puts(i8* dereferenceable(1) %7)
br label %9
9: ; preds = %0, %4
ret i32 0
}