#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 *);
void errmsg(int n) {
  switch (n) {
  case 1:
    printf("\terr: expression contains space\n");
    break;
  case 2:
    printf("\terr: missing operator after digit\n");
    break;
  case 3:
    printf("\terr: missing operator after parenthasis\n");
    break;
  case 4:
    printf("\terr: unbalanced parenthases\n");
    break;
  case 5:
    printf("\terr: invalid expression\n");
    break;
  }
}


x86 assembly (clang, -O0):
<errmsg>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0x4,%eax
ja     1194 <errmsg+0x84>
mov    -0x10(%rbp),%rax
lea    0xec5(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xec9(%rip),%rdi
call   1030 <printf@plt>
jmp    1194 <errmsg+0x84>
lea    0xed9(%rip),%rdi
call   1030 <printf@plt>
jmp    1194 <errmsg+0x84>
lea    0xeec(%rip),%rdi
call   1030 <printf@plt>
jmp    1194 <errmsg+0x84>
lea    0xf05(%rip),%rdi
call   1030 <printf@plt>
jmp    1194 <errmsg+0x84>
lea    0xf12(%rip),%rdi
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<errmsg>:
add    $0xffffffff,%edi
cmp    $0x4,%edi
ja     112e <errmsg+0x1e>
movslq %edi,%rax
lea    0xf82(%rip),%rcx
movslq (%rcx,%rax,4),%rdi
add    %rcx,%rdi
jmp    1030 <puts@plt>
ret

LLVM IR (-O0):
@.str = [33 x i8] c"\09err: expression contains space\0A\00"
@.str.1 = [36 x i8] c"\09err: missing operator after digit\0A\00"
@.str.2 = [42 x i8] c"\09err: missing operator after parenthasis\0A\00"
@.str.3 = [30 x i8] c"\09err: unbalanced parenthases\0A\00"
@.str.4 = [26 x i8] c"\09err: invalid expression\0A\00"
define void @errmsg(i32 %0) {
%2 = alloca i32
store i32 %0, i32* %2
%3 = load i32, i32* %2
switch i32 %3, label %14 [
i32 1, label %4
i32 2, label %6
i32 3, label %8
i32 4, label %10
i32 5, label %12
]
4: ; preds = %1
%5 = call i32 @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0))
br label %14
6: ; preds = %1
%7 = call i32 @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.1, i64 0, i64 0))
br label %14
8: ; preds = %1
%9 = call i32 @printf(i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str.2, i64 0, i64 0))
br label %14
10: ; preds = %1
%11 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0))
br label %14
12: ; preds = %1
%13 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0))
br label %14
14: ; preds = %1, %12, %10, %8, %6, %4
ret void
}

LLVM IR (-O2):
@str = [25 x i8] c"\09err: invalid expression\00"
@str.5 = [29 x i8] c"\09err: unbalanced parenthases\00"
@str.6 = [41 x i8] c"\09err: missing operator after parenthasis\00"
@str.7 = [35 x i8] c"\09err: missing operator after digit\00"
@str.8 = [32 x i8] c"\09err: expression contains space\00"
@reltable.errmsg = [5 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([32 x i8]* @str.8 to i64), i64 ptrtoint ([5 x i32]* @reltable.errmsg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([35 x i8]* @str.7 to i64), i64 ptrtoint ([5 x i32]* @reltable.errmsg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([41 x i8]* @str.6 to i64), i64 ptrtoint ([5 x i32]* @reltable.errmsg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([29 x i8]* @str.5 to i64), i64 ptrtoint ([5 x i32]* @reltable.errmsg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([25 x i8]* @str to i64), i64 ptrtoint ([5 x i32]* @reltable.errmsg to i64)) to i32)]
define void @errmsg(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 5
br i1 %3, label %4, label %9
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([5 x i32]* @reltable.errmsg to i8*), i64 %6)
%8 = tail call i32 @puts(i8* dereferenceable(1) %7)
br label %9
9: ; preds = %1, %4
ret void
}