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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/97699] New: [11 regression] zero-scratch-regs tests
 fail on arm
Date: Tue, 03 Nov 2020 13:41:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97699

            Bug ID: 97699
           Summary: [11 regression] zero-scratch-regs tests fail on arm
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: clyon at gcc dot gnu.org
  Target Milestone: ---

Some of the recently added zero-scratch-regs-* tests fail on arm.

For instance when configuring GCC
--target arm-none-linux-gnueabihf
--with-mode arm
--with-cpu cortex-a9
--with-fpu neon-fp16

I can see:
FAIL: c-c++-common/zero-scratch-regs-10.c  -Wc++-compat  (test for excess
errors)
FAIL: c-c++-common/zero-scratch-regs-11.c  -Wc++-compat  (test for excess
errors)
FAIL: c-c++-common/zero-scratch-regs-9.c  -Wc++-compat  (test for excess
errors)


The logs say:
/gcc/testsuite/c-c++-common/zero-scratch-regs-10.c:77:1: sorry, unimplement=
ed:
'-fzero-call-used_regs' not supported on this target

The other tests pass.

BTW, there's a typo in the error message, it should say
fzero-call-used-regs rather than fzero-call-used_regs (that is '-' instead =
of
'_' before 'regs')=