[llvm-commits] [llvm] r72700 - in /llvm/trunk/tools/lto: LTOModule.cpp LTOModule.h

[Devang Patel]

On Tue, Jun 2, 2009 at 12:04 PM, Duncan Sands <baldrick at free.fr> wrote:
>>>From the description, I think this is an issue of emulating some funny
>> linker hacks in LTO mode rather than an issue of actual linking.  So
>> whether two files are linked with llvm-link has no effect on the
>> issue.
>
> Isn't LTO supposed to be more or less equivalent to: link using
> llvm-link, optimize using opt, codegen using llc?

No. In LTO mode, the linker collects and shares information from
bitcode files as well as from non-bitcode object files.

llvm-link+opt+llc path does not collect & share any info from non-bit
code file. Actually llvlm-link+opt+llc is essentially same as generate
bitcode+opt+llc in this regard.

> If so, that
> means that any hack needed for LTO should also be needed by one
> of llvm-link, opt or llc...
>
> Ciao,
>
> Duncan.
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-- 
-
Devang