[llvm-dev] Tail calls and portability

[Dan Gohman via llvm-dev]

The current version of the WebAssembly ISA doesn't support tail calls. It
is likely that support will be added in future versions.

Dan


On Jan 4, 2017 8:34 PM, "Mehdi Amini" <mehdi.amini at apple.com> wrote:

As a general “good practice", you should answer to your own thread you
started this morning instead of starting a new one with little difference:
http://lists.llvm.org/pipermail/llvm-dev/2017-January/108678.html

+CC WebAssembly folks to make sure they don’t miss this question.

—
Mehdi



> On Jan 4, 2017, at 7:07 PM, Demi Obenour via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
>
> I have been working on adding proper tail (via `become`) to rustc.  I was
able to make them work (some parts of the type checker aren't implemented
yet).  However, I ran into an LLVM-related problem.
>
> LLVM claims to support proper tail calls when fastcc is used — but only
on i386, x86-64 and PowerPC.  Is this accurate? Will proper tail calls be
supported on WebAssembly?  Are they supported on ARM? AArch64? Other
backends?
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> llvm-dev at lists.llvm.org
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