[Bug tree-optimization/31169] Bootstrap comparison error at revision 122821
------- Comment #31 from dave at hiauly1 dot hia dot nrc dot ca 2007-03-28 00:58 -------
Subject: Re: Bootstrap comparison error at revision 122821
> /* If we have a RSHIFT_EXPR with a possibly negative shift
> count or an anti-range shift count drop to VR_VARYING.
> We currently cannot handle the overflow cases correctly. */
> if (code == RSHIFT_EXPR
> && (vr1.type == VR_ANTI_RANGE
> || !vrp_expr_computes_nonnegative (op1, &sop)))
> set_value_range_to_varying (vr);
> we make sure neither vr0 nor vr1 are anti-ranges and vr1 is >= 0.
Don't see the check to make sure vr0 isn't an anti-range. It
was eliminated by the hunk 3 change.
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