https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68695
--- Comment #15 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Providing that macro does fix the problem:
#define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
if (GET_MODE_CLASS (MODE) == MODE_INT \
&& GET_MODE_SIZE (MODE) < (TARGET_ZARCH ? 8 : 4)) \
(MODE) = TARGET_ZARCH ? DImode : SImode;
But is it a good idea to define it in the first place?
And is it now required to provide a sensible implementation of PROMOTE_MODE?
