XCore target: Add target specific EmitVAArg

[Rafael Espíndola]

+    llvm_unreachable("Unsupported ABI kind for va_arg");

Unsupported or it is impossible to get here? If it is something a user
can hit, this should probably be report_fatal_error as
llvm_unreachable will not cause clang to stop in a -Asserts build.

+// RUN: %clang -target xcore -O3

Why run the tests at -O3? We normally prefer to test clang at -O0.

LGTM with those comments addressed.


On 15 August 2013 06:52, Robert Lytton <robert at xmos.com> wrote:
> Hi,
>
> Add target specific EmitVAArg to XCore target.
> This was so aggregates could be passed as var args too.
>
> Robert
>
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