RE: [PATCH] vect-pragma-target-2.C: Compile with -march=x86-64

> -----Original Message-----
> From: Liu, Hongtao
> Sent: Tuesday, August 18, 2026 9:43 AM
> To: H.J. Lu <[email protected]>; GCC Patches <[email protected]>;
> Uros Bizjak <[email protected]>
> Subject: RE: [PATCH] vect-pragma-target-2.C: Compile with -march=x86-64
> 
> > -----Original Message-----
> > From: H.J. Lu <[email protected]>
> > Sent: Tuesday, August 18, 2026 9:12 AM
> > To: GCC Patches <[email protected]>; Uros Bizjak
> > <[email protected]>; Liu, Hongtao <[email protected]>
> > Subject: [PATCH] vect-pragma-target-2.C: Compile with -march=x86-64
> >
> > Compile vect-pragma-target-2.C with -march=x86-64 so that x86-64-v2
> > and above features aren't enabled on x86-64-v4 machines when GCC is
> > configured with
> >
> > --with-arch=native --with-cpu=native
> 
> There are quite a few test cases that fail under --with-arch=native. As I
> understand it, the primary intent of using --with-arch=native is to serve as an
> indicator for detecting genuine regressions, rather than to actively investigate
> and fix those individual failures.

Just to clarify, I am not opposed to the patch itself,  but rather discussing the strategy around regression testing with --with-arch=native.

> 
> >
> > PR testsuite/126923
> > * g++.target/i386/vect-pragma-target-2.C (dg-options): Add -march=x86-
> 64.
> >
> > --
> > H.J.