#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 */
char *getenv(char *);
scalar_t__ malloc(scalar_t__);
int /*<<< orphan*/ strcat(char *, char *);
int /*<<< orphan*/ strcpy(char *, char *);
scalar_t__ strlen(char *);
char *favorites_get_filename() {
  char *home = getenv("HOME");
  char *fileName =
      (char *)malloc(strlen(home) + 1 + strlen(".hh_favorites") + 1);
  strcpy(fileName, home);
  strcat(fileName, "/");
  strcat(fileName, ".hh_favorites");
  return fileName;
}


x86 assembly (clang, -O0):
<favorites_get_filename>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
lea    0xea1(%rip),%rdi
call   1030 <getenv@plt>
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
call   1050 <strlen@plt>
add    $0x1,%rax
mov    %rax,-0x18(%rbp)
lea    0xe85(%rip),%rdi
call   1050 <strlen@plt>
mov    -0x18(%rbp),%rdi
add    %rax,%rdi
add    $0x1,%rdi
call   1060 <malloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
mov    -0x8(%rbp),%rsi
call   1040 <strcpy@plt>
mov    -0x10(%rbp),%rdi
lea    0xe62(%rip),%rsi
call   1070 <strcat@plt>
mov    -0x10(%rbp),%rdi
lea    0xe44(%rip),%rsi
call   1070 <strcat@plt>
mov    -0x10(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<favorites_get_filename>:
push   %r14
push   %rbx
push   %rax
lea    0xea5(%rip),%rdi
call   1030 <getenv@plt>
mov    %rax,%r14
mov    %rax,%rdi
call   1050 <strlen@plt>
lea    0xf(%rax),%rdi
call   1060 <malloc@plt>
mov    %rax,%rbx
mov    %rax,%rdi
mov    %r14,%rsi
call   1040 <strcpy@plt>
lea    0xe8a(%rip),%rsi
mov    %rbx,%rdi
call   1070 <strcat@plt>
lea    0xe6d(%rip),%rsi
mov    %rbx,%rdi
call   1070 <strcat@plt>
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [5 x i8] c"HOME\00"
@.str.1 = [14 x i8] c".hh_favorites\00"
@.str.2 = [2 x i8] c"/\00"
define i8* @favorites_get_filename() {
%1 = alloca i8*
%2 = alloca i8*
%3 = call i8* @getenv(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
store i8* %3, i8** %1
%4 = load i8*, i8** %1
%5 = call i64 @strlen(i8* %4)
%6 = add nsw i64 %5, 1
%7 = call i64 @strlen(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0))
%8 = add nsw i64 %6, %7
%9 = add nsw i64 %8, 1
%10 = call i64 @malloc(i64 %9)
%11 = inttoptr i64 %10 to i8*
store i8* %11, i8** %2
%12 = load i8*, i8** %2
%13 = load i8*, i8** %1
%14 = call i32 @strcpy(i8* %12, i8* %13)
%15 = load i8*, i8** %2
%16 = call i32 @strcat(i8* %15, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%17 = load i8*, i8** %2
%18 = call i32 @strcat(i8* %17, i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0))
%19 = load i8*, i8** %2
ret i8* %19
}

LLVM IR (-O2):
@.str = [5 x i8] c"HOME\00"
@.str.1 = [14 x i8] c".hh_favorites\00"
@.str.2 = [2 x i8] c"/\00"
define i8* @favorites_get_filename() {
%1 = tail call i8* @getenv(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
%2 = tail call i64 @strlen(i8* dereferenceable(1) %1)
%3 = add nsw i64 %2, 15
%4 = tail call i64 @malloc(i64 %3)
%5 = inttoptr i64 %4 to i8*
%6 = tail call i32 @strcpy(i8* %5, i8* %1)
%7 = tail call i32 @strcat(i8* %5, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%8 = tail call i32 @strcat(i8* %5, i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0))
ret i8* %5
}