#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*/ abort();
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
scalar_t__ malloc(scalar_t__);
int /*<<< orphan*/ stderr;
int /*<<< orphan*/ strcpy(char *, char *);
scalar_t__ strlen(char *);
char *copystring(char *value) {
  char *copy = (char *)malloc(strlen(value) + 1);
  if (!copy) {
    fprintf(stderr, "Unable to allocate string value %s\n", value);
    abort();
  }
  strcpy(copy, value);
  return copy;
}


x86 assembly (clang, -O0):
<copystring>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
call   1050 <strlen@plt>
mov    %rax,%rdi
add    $0x1,%rdi
call   1070 <malloc@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
jne    11a0 <copystring+0x50>
mov    0x2e59(%rip),%rax
mov    (%rax),%edi
mov    -0x8(%rbp),%rdx
lea    0xe6c(%rip),%rsi
call   1060 <fprintf@plt>
mov    $0x0,%al
call   1030 <abort@plt>
mov    -0x10(%rbp),%rdi
mov    -0x8(%rbp),%rsi
call   1040 <strcpy@plt>
mov    -0x10(%rbp),%rax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<copystring>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
call   1050 <strlen@plt>
lea    0x1(%rax),%rdi
call   1070 <malloc@plt>
test   %rax,%rax
je     1183 <copystring+0x33>
mov    %rax,%rbx
mov    %rax,%rdi
mov    %r14,%rsi
call   1040 <strcpy@plt>
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret
mov    0x2e56(%rip),%rax
mov    (%rax),%edi
lea    0xe6d(%rip),%rsi
mov    %r14,%rdx
call   1060 <fprintf@plt>
xor    %eax,%eax
call   1030 <abort@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [36 x i8] c"Unable to allocate string value %s\0A\00"
define i8* @copystring(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = call i64 @strlen(i8* %4)
%6 = add nsw i64 %5, 1
%7 = call i64 @malloc(i64 %6)
%8 = inttoptr i64 %7 to i8*
store i8* %8, i8** %3
%9 = load i8*, i8** %3
%10 = icmp ne i8* %9, null
br i1 %10, label %16, label %11
11: ; preds = %1
%12 = load i32, i32* @stderr
%13 = load i8*, i8** %2
%14 = call i32 @fprintf(i32 %12, i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0), i8* %13)
%15 = call i32 (...) @abort()
unreachable
16: ; preds = %1
%17 = load i8*, i8** %3
%18 = load i8*, i8** %2
%19 = call i32 @strcpy(i8* %17, i8* %18)
%20 = load i8*, i8** %3
ret i8* %20
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [36 x i8] c"Unable to allocate string value %s\0A\00"
define i8* @copystring(i8* %0) {
%2 = tail call i64 @strlen(i8* dereferenceable(1) %0)
%3 = add nsw i64 %2, 1
%4 = tail call i64 @malloc(i64 %3)
%5 = inttoptr i64 %4 to i8*
%6 = icmp eq i64 %4, 0
br i1 %6, label %7, label %11
7: ; preds = %1
%8 = load i32, i32* @stderr
%9 = tail call i32 @fprintf(i32 %8, i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0), i8* %0)
%10 = tail call i32 (...) @abort()
unreachable
11: ; preds = %1
%12 = tail call i32 @strcpy(i8* %5, i8* %0)
ret i8* %5
}