#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 main(int argc, char *argv[]) {
  if (argc != 2) {
    printf("ERROR: You need one argument.\n");
    return 1;
  }
  int i;
  char letter;
  for (i = 0; letter = argv[1][i], letter != '\0'; i++) {
    switch (letter) {
    case 'a':
    case 'A':
      printf("%d: 'A'\n", i);
      break;
    case 'e':
    case 'E':
      printf("%d: 'E'\n", i);
      break;
    case 'i':
    case 'I':
      printf("%d: 'I'\n", i);
      break;
    case 'o':
    case 'O':
      printf("%d: 'O'\n", i);
      break;
    case 'u':
    case 'U':
      printf("%d: 'U'\n", i);
      break;
    case 'y':
    case 'Y':
      if (i % 2 == 0) {
        printf("%d: 'Y'\n", i);
      } else {
        printf("%d: %c is not a vowel\n", i, letter);
      }
      break;
    default:
      printf("%d: %c is not a vowel\n", i, letter);
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
je     114a <main+0x3a>
lea    0xfad(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    127b <main+0x16b>
movl   $0x0,-0x14(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,1),%al
mov    %al,-0x15(%rbp)
movsbl -0x15(%rbp),%eax
cmp    $0x0,%eax
je     1274 <main+0x164>
movsbl -0x15(%rbp),%eax
add    $0xffffffbf,%eax
mov    %eax,%ecx
mov    %rcx,-0x20(%rbp)
sub    $0x38,%eax
ja     124c <main+0x13c>
mov    -0x20(%rbp),%rax
lea    0xe6f(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
mov    -0x14(%rbp),%esi
lea    0xf5f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1261 <main+0x151>
mov    -0x14(%rbp),%esi
lea    0xf52(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1261 <main+0x151>
mov    -0x14(%rbp),%esi
lea    0xf45(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1261 <main+0x151>
mov    -0x14(%rbp),%esi
lea    0xf38(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1261 <main+0x151>
mov    -0x14(%rbp),%esi
lea    0xf2b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1261 <main+0x151>
mov    -0x14(%rbp),%eax
mov    $0x2,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    1232 <main+0x122>
mov    -0x14(%rbp),%esi
lea    0xf0a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1247 <main+0x137>
mov    -0x14(%rbp),%esi
movsbl -0x15(%rbp),%edx
lea    0xef9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1261 <main+0x151>
mov    -0x14(%rbp),%esi
movsbl -0x15(%rbp),%edx
lea    0xedf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1266 <main+0x156>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1151 <main+0x41>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
cmp    $0x2,%edi
jne    11dc <main+0xbc>
mov    %rsi,%rbx
mov    0x8(%rsi),%rax
mov    (%rax),%al
test   %al,%al
je     11ef <main+0xcf>
lea    0xeb4(%rip),%r12
lea    0xf33(%rip),%r13
lea    0xf35(%rip),%rbp
lea    0xf37(%rip),%r14
xor    %r15d,%r15d
jmp    118c <main+0x6c>
lea    0xf07(%rip),%rdi
nopl   (%rax)
mov    %r15d,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%rbx),%rax
movzbl 0x1(%rax,%r15,1),%eax
add    $0x1,%r15
test   %al,%al
je     11ef <main+0xcf>
movsbl %al,%edx
lea    -0x41(%rdx),%eax
ror    %eax
cmp    $0x1c,%eax
ja     11c9 <main+0xa9>
movslq (%r12,%rax,4),%rax
add    %r12,%rax
jmp    *%rax
lea    0xed4(%rip),%rdi
jmp    1170 <main+0x50>
mov    %r13,%rdi
jmp    1170 <main+0x50>
mov    %rbp,%rdi
jmp    1170 <main+0x50>
mov    %r14,%rdi
jmp    1170 <main+0x50>
test   $0x1,%r15b
jne    11c9 <main+0xa9>
lea    0xeda(%rip),%rdi
jmp    1170 <main+0x50>
lea    0xeda(%rip),%rdi
mov    %r15d,%esi
xor    %eax,%eax
call   1040 <printf@plt>
jmp    117a <main+0x5a>
lea    0xede(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%eax
jmp    11f1 <main+0xd1>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [31 x i8] c"ERROR: You need one argument.\0A\00"
@.str.1 = [9 x i8] c"%d: 'A'\0A\00"
@.str.2 = [9 x i8] c"%d: 'E'\0A\00"
@.str.3 = [9 x i8] c"%d: 'I'\0A\00"
@.str.4 = [9 x i8] c"%d: 'O'\0A\00"
@.str.5 = [9 x i8] c"%d: 'U'\0A\00"
@.str.6 = [9 x i8] c"%d: 'Y'\0A\00"
@.str.7 = [23 x i8] c"%d: %c is not a vowel\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i8
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp ne i32 %8, 2
br i1 %9, label %10, label %12
10: ; preds = %2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str, i64 0, i64 0))
store i32 1, i32* %3
br label %65
12: ; preds = %2
store i32 0, i32* %6
br label %13
13: ; preds = %61, %12
%14 = load i8**, i8*** %5
%15 = getelementptr inbounds i8*, i8** %14, i64 1
%16 = load i8*, i8** %15
%17 = load i32, i32* %6
%18 = sext i32 %17 to i64
%19 = getelementptr inbounds i8, i8* %16, i64 %18
%20 = load i8, i8* %19
store i8 %20, i8* %7
%21 = load i8, i8* %7
%22 = sext i8 %21 to i32
%23 = icmp ne i32 %22, 0
br i1 %23, label %24, label %64
24: ; preds = %13
%25 = load i8, i8* %7
%26 = sext i8 %25 to i32
switch i32 %26, label %55 [
i32 97, label %27
i32 65, label %27
i32 101, label %30
i32 69, label %30
i32 105, label %33
i32 73, label %33
i32 111, label %36
i32 79, label %36
i32 117, label %39
i32 85, label %39
i32 121, label %42
i32 89, label %42
]
27: ; preds = %24, %24
%28 = load i32, i32* %6
%29 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %28)
br label %60
30: ; preds = %24, %24
%31 = load i32, i32* %6
%32 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %31)
br label %60
33: ; preds = %24, %24
%34 = load i32, i32* %6
%35 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i32 %34)
br label %60
36: ; preds = %24, %24
%37 = load i32, i32* %6
%38 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.4, i64 0, i64 0), i32 %37)
br label %60
39: ; preds = %24, %24
%40 = load i32, i32* %6
%41 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.5, i64 0, i64 0), i32 %40)
br label %60
42: ; preds = %24, %24
%43 = load i32, i32* %6
%44 = srem i32 %43, 2
%45 = icmp eq i32 %44, 0
br i1 %45, label %46, label %49
46: ; preds = %42
%47 = load i32, i32* %6
%48 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i32 %47)
br label %54
49: ; preds = %42
%50 = load i32, i32* %6
%51 = load i8, i8* %7
%52 = sext i8 %51 to i32
%53 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.7, i64 0, i64 0), i32 %50, i32 %52)
br label %54
54: ; preds = %49, %46
br label %60
55: ; preds = %24
%56 = load i32, i32* %6
%57 = load i8, i8* %7
%58 = sext i8 %57 to i32
%59 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.7, i64 0, i64 0), i32 %56, i32 %58)
br label %60
60: ; preds = %55, %54, %39, %36, %33, %30, %27
br label %61
61: ; preds = %60
%62 = load i32, i32* %6
%63 = add nsw i32 %62, 1
store i32 %63, i32* %6
br label %13
64: ; preds = %13
store i32 0, i32* %3
br label %65
65: ; preds = %64, %10
%66 = load i32, i32* %3
ret i32 %66
}

LLVM IR (-O2):
@.str.1 = [9 x i8] c"%d: 'A'\0A\00"
@.str.2 = [9 x i8] c"%d: 'E'\0A\00"
@.str.3 = [9 x i8] c"%d: 'I'\0A\00"
@.str.4 = [9 x i8] c"%d: 'O'\0A\00"
@.str.5 = [9 x i8] c"%d: 'U'\0A\00"
@.str.6 = [9 x i8] c"%d: 'Y'\0A\00"
@.str.7 = [23 x i8] c"%d: %c is not a vowel\0A\00"
@str = [30 x i8] c"ERROR: You need one argument.\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %4, label %9
4: ; preds = %2
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = load i8, i8* %6
%8 = icmp eq i8 %7, 0
br i1 %8, label %49, label %11
9: ; preds = %2
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str, i64 0, i64 0))
br label %49
11: ; preds = %4, %43
%12 = phi i64 [ %44, %43 ], [ 0, %4 ]
%13 = phi i8 [ %47, %43 ], [ %7, %4 ]
%14 = sext i8 %13 to i32
%15 = add nsw i32 %14, -65
%16 = tail call i32 @llvm.fshl.i32(i32 %15, i32 %15, i32 31)
switch i32 %16, label %40 [
i32 16, label %17
i32 0, label %17
i32 18, label %20
i32 2, label %20
i32 20, label %23
i32 4, label %23
i32 23, label %26
i32 7, label %26
i32 26, label %29
i32 10, label %29
i32 28, label %32
i32 12, label %32
]
17: ; preds = %11, %11
%18 = trunc i64 %12 to i32
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %18)
br label %43
20: ; preds = %11, %11
%21 = trunc i64 %12 to i32
%22 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %21)
br label %43
23: ; preds = %11, %11
%24 = trunc i64 %12 to i32
%25 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i32 %24)
br label %43
26: ; preds = %11, %11
%27 = trunc i64 %12 to i32
%28 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.4, i64 0, i64 0), i32 %27)
br label %43
29: ; preds = %11, %11
%30 = trunc i64 %12 to i32
%31 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.5, i64 0, i64 0), i32 %30)
br label %43
32: ; preds = %11, %11
%33 = trunc i64 %12 to i32
%34 = and i32 %33, 1
%35 = icmp eq i32 %34, 0
br i1 %35, label %36, label %38
36: ; preds = %32
%37 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i32 %33)
br label %43
38: ; preds = %32
%39 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str.7, i64 0, i64 0), i32 %33, i32 %14)
br label %43
40: ; preds = %11
%41 = trunc i64 %12 to i32
%42 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str.7, i64 0, i64 0), i32 %41, i32 %14)
br label %43
43: ; preds = %17, %20, %23, %26, %29, %40, %38, %36
%44 = add nuw i64 %12, 1
%45 = load i8*, i8** %5
%46 = getelementptr inbounds i8, i8* %45, i64 %44
%47 = load i8, i8* %46
%48 = icmp eq i8 %47, 0
br i1 %48, label %49, label %11
49: ; preds = %43, %4, %9
%50 = phi i32 [ 1, %9 ], [ 0, %4 ], [ 0, %43 ]
ret i32 %50
}