[gcc(refs/users/meissner/heads/pr96762)] Do not call LXVL/STXVL on 32-bit.

[Michael Meissner <meissner@gcc.gnu.org>]

https://gcc.gnu.org/g:3849ea3a3518430708939187659bbcded8cccab2

commit 3849ea3a3518430708939187659bbcded8cccab2
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Thu May 27 17:27:26 2021 -0400

    Do not call LXVL/STXVL on 32-bit.
    
    In bug PR target/96762, the code wants to do a block move of a 17 byte
    string literal in -m32 mode.  This involves a shift of the DImode length
    by 56 bits, which is not available in 32-bit.
    
    gcc/
    2021-05-27  Michael Meissner  <meissner@linux.ibm.com>
    
            PR target/96762
            * config/rs6000/rs6000-string.c (expand_block_move): Do not try to
            do LXVL and STXVL on 32-bit.

Diff:
---
 gcc/config/rs6000/rs6000-string.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/rs6000-string.c b/gcc/config/rs6000/rs6000-string.c
index cc75ca5848e..f3226e25327 100644
--- a/gcc/config/rs6000/rs6000-string.c
+++ b/gcc/config/rs6000/rs6000-string.c
@@ -2811,7 +2811,7 @@ expand_block_move (rtx operands[], bool might_overlap)
 	  gen_func.mov = gen_vsx_movv2di_64bit;
 	}
       else if (TARGET_BLOCK_OPS_UNALIGNED_VSX
-	       && TARGET_POWER10 && bytes < 16
+	       && TARGET_POWER10 && bytes < 16 && TARGET_POWERPC64
 	       && orig_bytes > 16
 	       && !(bytes == 1 || bytes == 2
 		    || bytes == 4 || bytes == 8)