#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 strlen(char *);
void file_name(char *filename) {
  int i;
  int len = strlen(filename);
  for (i = 0; i < len; i++) {
    if (filename[i] == '.') {
      filename[i] = '\0';
      break;
    }
  }
}


x86 assembly (clang, -O0):
<file_name>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x10(%rbp)
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    1174 <file_name+0x64>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x2e,%eax
jne    1161 <file_name+0x51>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
jmp    1174 <file_name+0x64>
jmp    1166 <file_name+0x56>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    112f <file_name+0x1f>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<file_name>:
push   %rbx
mov    %rdi,%rbx
call   1030 <strlen@plt>
test   %eax,%eax
jle    113f <file_name+0x2f>
mov    %eax,%eax
xor    %ecx,%ecx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
cmpb   $0x2e,(%rbx,%rcx,1)
je     1141 <file_name+0x31>
add    $0x1,%rcx
cmp    %rcx,%rax
jne    1130 <file_name+0x20>
pop    %rbx
ret
movb   $0x0,(%rbx,%rcx,1)
pop    %rbx
ret

LLVM IR (-O0):
define void @file_name(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
%4 = alloca i32
store i8* %0, i8** %2
%5 = load i8*, i8** %2
%6 = call i32 @strlen(i8* %5)
store i32 %6, i32* %4
store i32 0, i32* %3
br label %7
7: ; preds = %25, %1
%8 = load i32, i32* %3
%9 = load i32, i32* %4
%10 = icmp slt i32 %8, %9
br i1 %10, label %11, label %28
11: ; preds = %7
%12 = load i8*, i8** %2
%13 = load i32, i32* %3
%14 = sext i32 %13 to i64
%15 = getelementptr inbounds i8, i8* %12, i64 %14
%16 = load i8, i8* %15
%17 = sext i8 %16 to i32
%18 = icmp eq i32 %17, 46
br i1 %18, label %19, label %24
19: ; preds = %11
%20 = load i8*, i8** %2
%21 = load i32, i32* %3
%22 = sext i32 %21 to i64
%23 = getelementptr inbounds i8, i8* %20, i64 %22
store i8 0, i8* %23
br label %28
24: ; preds = %11
br label %25
25: ; preds = %24
%26 = load i32, i32* %3
%27 = add nsw i32 %26, 1
store i32 %27, i32* %3
br label %7
28: ; preds = %19, %7
ret void
}

LLVM IR (-O2):
define void @file_name(i8* %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp sgt i32 %2, 0
br i1 %3, label %4, label %17
4: ; preds = %1
%5 = zext i32 %2 to i64
br label %6
6: ; preds = %4, %14
%7 = phi i64 [ 0, %4 ], [ %15, %14 ]
%8 = getelementptr inbounds i8, i8* %0, i64 %7
%9 = load i8, i8* %8
%10 = icmp eq i8 %9, 46
br i1 %10, label %11, label %14
11: ; preds = %6
%12 = and i64 %7, 4294967295
%13 = getelementptr inbounds i8, i8* %0, i64 %12
store i8 0, i8* %13
br label %17
14: ; preds = %6
%15 = add nuw nsw i64 %7, 1
%16 = icmp eq i64 %15, %5
br i1 %16, label %17, label %6
17: ; preds = %14, %1, %11
ret void
}