https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113720
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Matthias Klose from comment #4)
> Uros proposed patch lets the build succeed.
FTR, the problem was in umuldi3_highpart expander, which did:
if (REG_P (operands[2]))
operands[2] = gen_rtx_ZERO_EXTEND (TImode, operands[2]);
on register_operand predicate, which also allows SUBREG RTX. So, subregs were
emitted without ZERO_EXTEND RTX.
But nowadays we have UMUL_HIGHPART that allows us to fix this issue while also
simplifying the instruction RTX.
Matthias, can you please run the regression check - The fix is kind of obvious,
but just to be sure.
