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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/95267] [ICE][gcse]: in process_insert_insn at
 gcse.c
Date: Fri, 22 May 2020 04:07:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95267

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The internals documentation documents this even, read:
https://gcc.gnu.org/onlinedocs/gccint/RTL-Template.html#index-match_005fdup

>>From that:
Note that match_dup should not be used to tell the compiler that a particul=
ar
register is being used for two operands (example: add that adds one registe=
r to
another; the second register is both an input operand and the output operan=
d).
Use a matching constraint (see Simple Constraints) for those.=