LTO API: add lto_module_create_from_memory_with_path.

[Rafael Espíndola]

On 7 February 2014 18:06, Manman Ren <manman.ren at gmail.com> wrote:
>
> Hi all,
>
> This function adds an extra path argument to lto_module_create_from_memory.
> The path argument will be passed to makeBuffer to make sure the MemoryBuffer
> has a name and the created module has a module identifier. Modules created
> by lto_module_create_from_memory will have empty module identifiers.
>
> This is mainly for emitting warning messages from the linker. When we emit
> warning message on one module, we can then use its module identifier.
>
> LTO_API_VERSION is bumped to 9.


+  /// makeBuffer -

While at it, please remove the function name from the comment.

-                                  std::string &errMsg);
+                                  std::string &errMsg, const char *path = "");

The C++ files should probably use a StringRef.

LGTM with that.

Cheers,
Rafael