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Date: Tue, 12 Apr 2022 13:04:07 -0500
From: Segher Boessenkool <segher@kernel.crashing.org>
To: Alexandre Oliva <oliva@adacore.com>
Cc: gcc-patches@gcc.gnu.org, David Edelsohn <dje.gcc@gmail.com>
Subject: Re: [PATCH] ppc: testsuite: test for arch_pwr7 with -mvsx in
 fold-vec-insert-double
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On Mon, Apr 11, 2022 at 08:59:41PM -0300, Alexandre Oliva wrote:
> 
> gcc.target/powerpc/fold-vec-insert-double.c is compiled with -mvsx,
> while the expected asm output depends on target has_arch_pwr7, which
> is tested for without -mvsx.
> 
> In some of our configurations, that have altivec and vsx disabled by
> default, the former defines up to _ARCH_PWR7, while the latter defines
> only up to _ARCH_PWR4, i.e., we compile for power7, and test for
> non-power7.

You cannot use -mvsx if you do not have -mcpu=power7 (or higher).  If
-mvsx is allowed (i.e. when powerpc_vsx_ok is satisfied) you always are
compiling for power7 or higher.

What goes wrong?


Segher