#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 atoi(char *);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ testCase1();
int /*<<< orphan*/ testCase2();
int main(int argc, char *argv[]) {
  if (argc < 2) {
    printf("Missing args\n");
    return 1;
  }
  int testcase = atoi(argv[1]);
  switch (testcase) {
  case 1:
    testCase1();
    break;
  case 2:
    testCase2();
    break;
  default:
    printf("Unknown test case %d\n", testcase);
    return 1;
  }
  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)
jge    117a <main+0x3a>
lea    0xe99(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11eb <main+0xab>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0x18(%rbp)
sub    $0x1,%eax
je     11af <main+0x6f>
jmp    119e <main+0x5e>
mov    -0x18(%rbp),%eax
sub    $0x2,%eax
je     11bb <main+0x7b>
jmp    11c7 <main+0x87>
mov    $0x0,%al
call   1030 <testCase1@plt>
jmp    11e4 <main+0xa4>
mov    $0x0,%al
call   1050 <testCase2@plt>
jmp    11e4 <main+0xa4>
mov    -0x14(%rbp),%esi
lea    0xe3d(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11eb <main+0xab>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x1,%edi
jg     1164 <main+0x14>
lea    0xeb9(%rip),%rdi
call   1040 <puts@plt>
jmp    119d <main+0x4d>
mov    0x8(%rsi),%rdi
call   1070 <atoi@plt>
cmp    $0x2,%eax
je     1182 <main+0x32>
cmp    $0x1,%eax
jne    118d <main+0x3d>
xor    %ebx,%ebx
xor    %eax,%eax
call   1030 <testCase1@plt>
jmp    11a2 <main+0x52>
xor    %ebx,%ebx
xor    %eax,%eax
call   1060 <testCase2@plt>
jmp    11a2 <main+0x52>
lea    0xe6c(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0x1,%ebx
mov    %ebx,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [14 x i8] c"Missing args\0A\00"
@.str.1 = [22 x i8] c"Unknown test case %d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 2
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0))
store i32 1, i32* %3
br label %25
11: ; preds = %2
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 1
%14 = load i8*, i8** %13
%15 = call i32 @atoi(i8* %14)
store i32 %15, i32* %6
%16 = load i32, i32* %6
switch i32 %16, label %21 [
i32 1, label %17
i32 2, label %19
]
17: ; preds = %11
%18 = call i32 (...) @testCase1()
br label %24
19: ; preds = %11
%20 = call i32 (...) @testCase2()
br label %24
21: ; preds = %11
%22 = load i32, i32* %6
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.1, i64 0, i64 0), i32 %22)
store i32 1, i32* %3
br label %25
24: ; preds = %19, %17
store i32 0, i32* %3
br label %25
25: ; preds = %24, %21, %9
%26 = load i32, i32* %3
ret i32 %26
}

LLVM IR (-O2):
@.str.1 = [22 x i8] c"Unknown test case %d\0A\00"
@str = [13 x i8] c"Missing args\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @str, i64 0, i64 0))
br label %16
6: ; preds = %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = tail call i32 @atoi(i8* %8)
switch i32 %9, label %14 [
i32 1, label %10
i32 2, label %12
]
10: ; preds = %6
%11 = tail call i32 (...) @testCase1()
br label %16
12: ; preds = %6
%13 = tail call i32 (...) @testCase2()
br label %16
14: ; preds = %6
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @.str.1, i64 0, i64 0), i32 %9)
br label %16
16: ; preds = %14, %12, %10, %4
%17 = phi i32 [ 1, %4 ], [ 1, %14 ], [ 0, %12 ], [ 0, %10 ]
ret i32 %17
}