------- Comment #8 from sgk at troutmask dot apl dot washington dot edu 2007-02-19 21:49 ------- Subject: Re: ICE with kind=8 exponentiaton
On Mon, Feb 19, 2007 at 09:11:45PM -0000, tkoenig at gcc dot gnu dot org wrote: > > >Feel free to create a gfc_extract_long_long and document that > > e is constrained to be within [LONG_LONG_MIN, LONG_LONG_MAX]. > > Suppose we don't simplify if gfc_extract_int fails. Would that > cause anything bad (like an ICE further down thr road)? > gfc_arith_power is expected to return one of ARITH_OK, ARITH_OVERFLOW, ARITH_UNDERFLOW, ARITH_NAN, ARITH_DIV0, ARITH_INCOMMENSURATE, or ARITH_ASYMMETRIC. We would need to prevent the call to gfc_arith_power in the special case of e not in [INT_MIN, INT_MAX]. A quick grep shows that gfc_arith_power is called from gfc_power, and laptop:kargl[261] grep gfc_power *c arith.c:gfc_power (gfc_expr *op1, gfc_expr *op2) expr.c: result = gfc_power (op1, op2); matchexp.c: r = gfc_power (e, exp); A glance at expr.c and matchexp.c suggests that a change to potentially call one of libgfortran's pow_* function would be nontrivial. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30834
