optimization/3712: abort in gen_umulsi3_highpart

[Andreas Schwab]

Richard Henderson <rth@redhat.com> writes:

|> The m68k backend appears to be very confused on this issue.
|> All constants are sign-extended.  Thus it makes no sense to
|> ask whether an SImode operand is uint32.
|> 
|> It would matter when asking about a DImode operand, but that
|> is not the case with umulsi3_highpart.

Thanks, it works for me.

Andreas.

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