On Thu, Oct 10, 2019 at 1:46 AM Richard Sandiford
wrote:
> subst tries to avoid creating invalid (zero_extend:DI (const_int N)):
>
> else if (CONST_SCALAR_INT_P (new_rtx)
>&& (GET_CODE (x) == ZERO_EXTEND
>|| GET_CODE (x) == FLOAT
>
Jim Wilson writes:
> This addresses PR 91860 which has four testcases triggering internal errors.
> The problem here is that in combine when handling debug insns, we are trying
> to substitute
> (sign_extend:DI (const_int 8160 [0x1fe0]))
> as the value for
> (reg:DI 78 [ _9 ])
> in the debug insn
