From: Aaron Sawdey <acsawdey@linux.ibm.com>
Date: Tue, 17 Nov 2020 17:55:01 +0000 (-0500)
Subject: Re-enable vector pair memcpy/memmove expansion
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c84add5c13d292b339e90b154587439e4721a8c5;p=gcc.git

Re-enable vector pair memcpy/memmove expansion

After the MMA opaque mode patch goes in, we can re-enable
use of vector pair in the inline expansion of memcpy/memmove.

gcc/
	* config/rs6000/rs6000.c (rs6000_option_override_internal):
	Enable vector pair memcpy/memmove expansion.
---

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index bd8205c87f7..d8ac2f0cd2f 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -4117,11 +4117,10 @@ rs6000_option_override_internal (bool global_init_p)
 
   if (!(rs6000_isa_flags_explicit & OPTION_MASK_BLOCK_OPS_VECTOR_PAIR))
     {
-      /* When the POImode issues of PR96791 are resolved, then we can
-	 once again enable use of vector pair for memcpy/memmove on
-	 P10 if we have TARGET_MMA.  For now we make it disabled by
-	 default for all targets.  */
-      rs6000_isa_flags &= ~OPTION_MASK_BLOCK_OPS_VECTOR_PAIR;
+      if (TARGET_MMA && TARGET_EFFICIENT_UNALIGNED_VSX)
+	rs6000_isa_flags |= OPTION_MASK_BLOCK_OPS_VECTOR_PAIR;
+      else
+	rs6000_isa_flags &= ~OPTION_MASK_BLOCK_OPS_VECTOR_PAIR;
     }
 
   /* Use long double size to select the appropriate long double.  We use