[gcc r13-3475] rs6000/test: Support vect_long_long effective target

[Kewen Lin <linkw@gcc.gnu.org>]

https://gcc.gnu.org/g:321f89e58510dd5df1b3dbe323344b987a7b11c6

commit r13-3475-g321f89e58510dd5df1b3dbe323344b987a7b11c6
Author: Kewen Lin <linkw@linux.ibm.com>
Date:   Tue Oct 25 00:18:45 2022 -0500

    rs6000/test: Support vect_long_long effective target
    
    Currently effective target vect_long_long doesn't have
    power specific check, I think it's an oversight.  This
    is to add the support which checks for has_arch_pwr8,
    since we set rs6000_vector_unit[V2DImode] as:
      (TARGET_P8_VECTOR) ? VECTOR_P8_VECTOR : VECTOR_NONE;
    it means its full support starts from ISA 2.07.
    Although ISA 2.06 has some instructions like lxvd2x
    and stxvd2x etc., it's used for testing, checking for
    ISA 2.07 is more sensitive.
    
    gcc/testsuite/ChangeLog:
    
            * lib/target-supports.exp (check_effective_target_vect_long_long): Add
            support for powerpc*-*-*.

Diff:
---
 gcc/testsuite/lib/target-supports.exp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 7824a441bca..ccbbee847f7 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -7075,7 +7075,10 @@ proc check_effective_target_vect_long_long { } {
 	     || ([istarget mips*-*-*]
 		 && [et-is-effective-target mips_msa])
 	     || ([istarget s390*-*-*]
-		 && [check_effective_target_s390_vx]) }}]
+		 && [check_effective_target_s390_vx])
+	     || ([istarget powerpc*-*-*]
+		 && ![istarget powerpc-*-linux*paired*]
+		 && [check_effective_target_has_arch_pwr8]) }}]
 }