[llvm-dev] IBM C/C++ and Fortran compilers to adopt LLVM open source infrastructure

[Kit Barton via llvm-dev]

Hi Tom,
To be perfectly honest with you, you're getting into some of the details
that we're in the process of working out. In general, we intend to support
compiling source files in different code pages and allow users to create
ASCII and EBCDIC programs with string/char literals in multiple code pages.

To answer your specific questions, our current clang-based compilers do not
support #pragma filetag or #pragma convlit. We do however have support for
#pragma convert.

Our intention is to commit all of this upstream, subject of course to
discussion and review with the community.

We'll be sending an RFC to the dev lists when we are ready to start
upstreaming our work. That RFC can include some more details about some of
these features.

Thanks,

Kit

On Tue, Feb 25, 2020 at 11:29 AM Tom Honermann via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi Kit.  I'm curious about the support for Clang on z/OS and, in
> particular, support for EBCDIC based source files and run-time interaction
> with the OS.  Would you be able to describe what features IBM has added (or
> will be adding) along those lines?  Will the z/OS enhanced ASCII
> functionality
> <https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.bpxb200/uenha.htm>
> be supported?  How about xlC's enhanced ASCII
> <https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.cbcux01/ascii.htm>
> support?  Or #pragma filetag
> <https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.cbcpx01/fltg.htm>?
> Or #pragma convlit
> <https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.cbcux01/convlit.htm>?
> Does IBM plan to contribute changes for these features back to the
> community?
>
>
>
> This sounds like a positive direction!
>
>
>
> Tom.
>
>
>
> (apologies if this message is received twice, my mail client is acting up).
>
>
>
> *From:* llvm-dev <llvm-dev-bounces at lists.llvm.org> *On Behalf Of *Kit
> Barton via llvm-dev
> *Sent:* Monday, February 24, 2020 1:44 PM
> *To:* llvm-dev at lists.llvm.org
> *Subject:* [llvm-dev] IBM C/C++ and Fortran compilers to adopt LLVM open
> source infrastructure
>
>
>
> Hi all,
>
> I'm very excited to be able to share this with everyone.
>
>
>
> IBM announced this morning our intention to migrate our existing XL C/C++
> and Fortran compilers to adopt the LLVM infrastructure. This will include
> both front-end (Clang) and back-end optimizations and code generation.
>
>
>
> You can read the full announcement here:
>
>
> https://developer.ibm.com/linuxonpower/2020/02/23/ibm-c-c-and-fortran-compilers-to-adopt-llvm-open-source-infrastructure/
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__developer.ibm.com_linuxonpower_2020_02_23_ibm-2Dc-2Dc-2Dand-2Dfortran-2Dcompilers-2Dto-2Dadopt-2Dllvm-2Dopen-2Dsource-2Dinfrastructure_&d=DwMFaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=oOJsFtgkFCCcDlfLWKmfrVDtpXLihXJTBGJfSapXCV0&m=tZKprmffzEkUM3gcP4LTvyihX_fLGH0hYTjj65EDfic&s=sJ3t-OgKvWIK4EtJUgDahDtw8bS0vXa8oxlPXMQ-X-c&e=>
>
>
>
> If anyone has any questions/comments, I'm very happy to discuss further -
> either through email or on discord (my presence on IRC is very
> intermittent).
>
>
>
> Kit Barton, Ph.D.
> STSM, Technical lead for LLVM on Power and XL Compilers
> IBM Toronto Lab, C2/705/8200/MKM
> 8200 Warden Ave, Markham, L6G 1C7
> (905) 413-3452
> kbarton at ca.ibm.com
>
>
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