[LLVMdev] bytecode stripping from clang -emit-llvm

[David Blaikie]

It's probably not VM related, but non-asserts builds of LLVM don't
produce named values. It's only the +Asserts builds of LLVM that
produce value (& block, I guess) names.

This is an optimization to avoid the extra work when we're just doing
the actual work of compiling anyway.

It'd be best to build your tool to not rely on these names.

On Thu, Apr 16, 2015 at 1:43 PM, Geof Sawaya
<fredericflintstone at gmail.com> wrote:
> Hi Devs,
>
> I'm developing a tool that relies on semantic information in bytecode labels
> (i.e. block names).
>
> I've discovered that clang is stripping these named labels (along with some
> virtual register names) when I run on a virtual machine.  Well, I'm using
> VirtualBox, and have tried two different versions of Ubuntu and some
> different clang builds.
>
> Can someone point me in the right direction to understand why the IR would
> be emitted differently because clang is running on a VM?
>
> Many thanks -- Geof
>
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