#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 */
scalar_t__ malloc(size_t);
int /*<<< orphan*/ strcat(char *, char *);
int /*<<< orphan*/ strcpy(char *, char *);
size_t strlen(char *);
char *getOutputFilename(char *fName) {
  char *outputName = "output_";
  char *newName = (char *)malloc(strlen(outputName) + strlen(fName));
  strcpy(newName, outputName);
  strcat(newName, fName);
  newName[strlen(newName)] = '\0';
  return newName;
}


x86 assembly (clang, -O0):
<getOutputFilename>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
lea    0xead(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
call   1040 <strlen@plt>
mov    %rax,-0x28(%rbp)
mov    -0x8(%rbp),%rdi
call   1040 <strlen@plt>
mov    -0x28(%rbp),%rdi
add    %rax,%rdi
call   1050 <malloc@plt>
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1030 <strcpy@plt>
mov    -0x18(%rbp),%rdi
mov    -0x8(%rbp),%rsi
call   1060 <strcat@plt>
mov    -0x18(%rbp),%rax
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rdi
call   1040 <strlen@plt>
mov    %rax,%rcx
mov    -0x20(%rbp),%rax
movb   $0x0,(%rax,%rcx,1)
mov    -0x18(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<getOutputFilename>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
call   1040 <strlen@plt>
lea    0x7(%rax),%rdi
call   1050 <malloc@plt>
mov    %rax,%rbx
lea    0xea1(%rip),%rsi
mov    %rax,%rdi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
mov    %r14,%rsi
call   1060 <strcat@plt>
mov    %rbx,%rdi
call   1040 <strlen@plt>
movb   $0x0,(%rbx,%rax,1)
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [8 x i8] c"output_\00"
define i8* @getOutputFilename(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i8*
store i8* %0, i8** %2
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8** %3
%5 = load i8*, i8** %3
%6 = call i64 @strlen(i8* %5)
%7 = load i8*, i8** %2
%8 = call i64 @strlen(i8* %7)
%9 = add i64 %6, %8
%10 = call i64 @malloc(i64 %9)
%11 = inttoptr i64 %10 to i8*
store i8* %11, i8** %4
%12 = load i8*, i8** %4
%13 = load i8*, i8** %3
%14 = call i32 @strcpy(i8* %12, i8* %13)
%15 = load i8*, i8** %4
%16 = load i8*, i8** %2
%17 = call i32 @strcat(i8* %15, i8* %16)
%18 = load i8*, i8** %4
%19 = load i8*, i8** %4
%20 = call i64 @strlen(i8* %19)
%21 = getelementptr inbounds i8, i8* %18, i64 %20
store i8 0, i8* %21
%22 = load i8*, i8** %4
ret i8* %22
}

LLVM IR (-O2):
@.str = [8 x i8] c"output_\00"
define i8* @getOutputFilename(i8* %0) {
%2 = tail call i64 @strlen(i8* dereferenceable(1) %0)
%3 = add i64 %2, 7
%4 = tail call i64 @malloc(i64 %3)
%5 = inttoptr i64 %4 to i8*
%6 = tail call i32 @strcpy(i8* %5, i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
%7 = tail call i32 @strcat(i8* %5, i8* %0)
%8 = tail call i64 @strlen(i8* dereferenceable(1) %5)
%9 = getelementptr inbounds i8, i8* %5, i64 %8
store i8 0, i8* %9
ret i8* %5
}