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From: "amacleod at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/97359] [11 Regression] ice in
 logical_combine, at gimple-range-gori.cc:754
Date: Wed, 14 Oct 2020 15:03:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97359

--- Comment #7 from Andrew Macleod <amacleod at redhat dot com> ---
There is no need to cache non-logical operands. Processing a relational suc=
h as
<,>,<=3D,>=3D is a linear process, and therefore we never needed to cache t=
hem.

&& and || is exponential as we have to evaluate=20
op1_true, op1_false,  op2_true,  and op2_false=20
and the resulting 4 combinations...  so each logical operand can trigger 4
lookup calculations.. and when they feed into each other the on-demand look=
ups
become exponential quite quickly..=20

the cache makes processing them linear as well.

Before the next stage 1 opens, I plan to rework the GORI computations to be
more efficient on calculating outgoing ranges.=