xcore emitEpilogue() losing "%R0<imp-use>"

Robert Lytton robert at xmos.com
Tue Jul 16 10:58:15 PDT 2013

Hi Richard

Here is a test & fix fora bug in the xcore emitEpilogue() that meant the return register was being lost viz:
    RETSP_u6 2, %SP<imp-def>, %SP<imp-use>
instead of:
    RETSP_u6 2, %SP<imp-def>, %SP<imp-use>, %R0<imp-use>


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