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From: "admin at levyhsu dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/97417] RISC-V Unnecessary andi instruction when loading
 volatile bool
Date: Mon, 09 Nov 2020 09:22:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97417

Levy <admin at levyhsu dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #49470|0                           |1
        is obsolete|                            |
  Attachment #49500|0                           |1
        is obsolete|                            |

--- Comment #23 from Levy <admin at levyhsu dot com> ---
Created attachment 49524
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D49524&action=3Dedit
Third test patch

While I'm waiting for a solution, I've reused my second patch and made a new
patch.
Third test patch adds one extra function gen_extend_insn_auto() in optabs.c=
/h
then just called by riscv_legitimize_move()
Now it can emit sign/unsigned-extend insn automatically.=20

Still haven't solved the shorten-memrefs issue. So it will still raise 2 er=
ror
when make report-gcc
So the -Os option (size optimization) may not behave as expected.=