#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 *, ...);
scalar_t__ strcmp(char *, char *);
char *strrchr(char *, char);
int main(int argc, char *argv[]) {
  if (argc != 2) {
    printf("ERROR: Argument expected\n");
    return 0;
  }
  char *ext = strrchr(argv[1], '.');
  if (strcmp(ext, ".sg") == 0) {
  } else {
    printf("ERROR: Expected file of |*.sg| but got |*%s| instead\n", ext);
    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     116a <main+0x3a>
lea    0xea9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
jmp    11b8 <main+0x88>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    $0x2e,%esi
call   1040 <strrchr@plt>
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
lea    0xe8f(%rip),%rsi
call   1050 <strcmp@plt>
cmp    $0x0,%rax
jne    119f <main+0x6f>
jmp    11b8 <main+0x88>
mov    -0x18(%rbp),%rsi
lea    0xe74(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    117e <main+0x3e>
mov    0x8(%rsi),%rdi
mov    $0x2e,%esi
call   1050 <strrchr@plt>
mov    %rax,%rbx
lea    0xea2(%rip),%rsi
mov    %rax,%rdi
call   1060 <strcmp@plt>
test   %rax,%rax
je     118a <main+0x4a>
lea    0xe92(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1040 <printf@plt>
jmp    118a <main+0x4a>
lea    0xeb5(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [26 x i8] c"ERROR: Argument expected\0A\00"
@.str.1 = [4 x i8] c".sg\00"
@.str.2 = [54 x i8] c"ERROR: Expected file of |*.sg| but got |*%s| instead\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i8*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %3
br label %23
11: ; preds = %2
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 1
%14 = load i8*, i8** %13
%15 = call i8* @strrchr(i8* %14, i8 signext 46)
store i8* %15, i8** %6
%16 = load i8*, i8** %6
%17 = call i64 @strcmp(i8* %16, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
%18 = icmp eq i64 %17, 0
br i1 %18, label %19, label %20
19: ; preds = %11
br label %23
20: ; preds = %11
%21 = load i8*, i8** %6
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([54 x i8], [54 x i8]* @.str.2, i64 0, i64 0), i8* %21)
store i32 0, i32* %3
br label %23
23: ; preds = %9, %20, %19
%24 = load i32, i32* %3
ret i32 %24
}

LLVM IR (-O2):
@.str.1 = [4 x i8] c".sg\00"
@.str.2 = [54 x i8] c"ERROR: Expected file of |*.sg| but got |*%s| instead\0A\00"
@str = [25 x i8] c"ERROR: Argument expected\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %6, label %4
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @str, i64 0, i64 0))
br label %14
6: ; preds = %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = tail call i8* @strrchr(i8* dereferenceable(1) %8, i8 signext 46)
%10 = tail call i64 @strcmp(i8* %9, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
%11 = icmp eq i64 %10, 0
br i1 %11, label %14, label %12
12: ; preds = %6
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([54 x i8], [54 x i8]* @.str.2, i64 0, i64 0), i8* %9)
br label %14
14: ; preds = %12, %6, %4
ret i32 0
}