[LLVMdev] Removing types from metadata

[Reid Kleckner]

Backwards compatibility with the LLVM IR textual format is not guaranteed,
while bitcode compatibility is. You can probably load up that old IR by
assembling it with an old llvm-as and loading the bitcode in new clang.
http://llvm.org/docs/DeveloperPolicy.html#ir-backwards-compatibility

That said, if it's just a matter of skipping over the 'metadata' token, it
would be nice to let old IR assemble.

On Fri, Dec 19, 2014 at 10:59 AM, Tom Stellard <tom at stellard.net> wrote:
>
> Hi,
>
> Types were recently removed from metadata in the IR, which means older
> LLVM IR code with metadata won't compile.  Was this intentional?
> Is there a practical way to maintain compatibility with older LLVM IR?
>
> Thanks,
> Tom
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