[NDS32] Emit stack push instructions for varargs at prologue stage and
emit stack adjustment instructions for varargs at epilogue stage.
-- Note that we do not need to handle it in v3push/v3pop prologue/epilogue
expanding because we do not apply v3push/v3pop for variadic function.
* config/nds32/nds32.c (nds32_expand_prologue): Emit stack push
instructions for varargs implementation.
(nds32_expand_epilogue): Emit stack adjustment instructions for
varargs implementation.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@214867 138bc75d-0d04-0410-961f-82ee72b054a4