Hi,
When TARGET_AVOID_XFORM is set, we turn off VSX. But at least from
ISA3.0 (Power9), we support DQ form vector load/store. This patch
is to make it not clear VSX when P9 VECTOR supported, it also checks
some flags which P9 VECTOR relies on, otherwise those flags could
disable P9 VECTOR later.
Bootstrapped and regtested on powerpc64le-linux-gnu P9 and
powerpc64-linux-gnu P8.
Is it ok for trunk?
BR,
Kewen
-----
gcc/ChangeLog:
* config/rs6000/rs6000.c (rs6000_option_override_internal): Consider
P9 VECTOR when determining to disable VSX for TARGET_AVOID_XFORM.
---
gcc/config/rs6000/rs6000.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 66b01e589b0..c020947abc8 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -3865,7 +3865,10 @@ rs6000_option_override_internal (bool global_init_p)
rs6000_isa_flags_explicit |= OPTION_MASK_VSX;
}
}
- else if (TARGET_AVOID_XFORM > 0)
+ else if (TARGET_AVOID_XFORM > 0
+ /* Exclude P9 VECTOR which supports DQ form, but need to check
+ some flags which are able to disable it as well. */
+ && !(TARGET_ALTIVEC && TARGET_P8_VECTOR && TARGET_P9_VECTOR))
msg = N_("%<-mvsx%> needs indexed addressing");
else if (!TARGET_ALTIVEC && (rs6000_isa_flags_explicit
& OPTION_MASK_ALTIVEC))
--
2.27.0
