On Tue, Jul 05, 2016 at 09:26:50PM -0500, Peter Bergner wrote:
> The following patch fixes a bug where we do not disable POWER9 vector dform
> addressing when we compile for POWER9 but without VSX support. This
> manifested
> itself with us trying to use dform addressing with altivec loads/stores
> which is illegal, leading to an ICE.
>
> This has bootstrapped and regtested with no regessions. Ok for trunk?
>
> This also affects the FSF 6 branch, ok there too, assuming bootstrap and
> regtesting complete cleanly?
>
> Peter
>
> gcc/
> * config/rs6000/rs6000.c (rs6000_option_override_internal): Disable
> -mpower9-dform-vector when disabling -mpower9-vector.
>
> gcc/testsuite/
> * gcc.target/powerpc/pr71733.c: New test.
>
>
> Index: gcc/config/rs6000/rs6000.c
> ===================================================================
> --- gcc/config/rs6000/rs6000.c (revision 237945)
> +++ gcc/config/rs6000/rs6000.c (working copy)
> @@ -4303,7 +4303,8 @@ rs6000_option_override_internal (bool gl
> {
> if (rs6000_isa_flags_explicit & OPTION_MASK_P8_VECTOR)
> error ("-mpower9-vector requires -mpower8-vector");
> - rs6000_isa_flags &= ~OPTION_MASK_P9_VECTOR;
> + rs6000_isa_flags &= ~(OPTION_MASK_P9_VECTOR
> + | OPTION_MASK_P9_DFORM_VECTOR);
> }
Note, this should be
+ rs6000_isa_flags &= ~(OPTION_MASK_P9_VECTOR_SCALAR
+ | OPTION_MASK_P9_DFORM_VECTOR);
However, we probably need to add all of the other options that depend on VSX.
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.vnet.ibm.com, phone: +1 (978) 899-4797
