[gcc(refs/vendors/riscv/heads/gcc-15-with-riscv-opts)] Fix minor RISC-V testsuite failure

[Jeff Law]

https://gcc.gnu.org/g:16c69514997402f95951578bd552e683d9169d33

commit 16c69514997402f95951578bd552e683d9169d33
Author: Jeff Law <jlaw@ventanamicro.com>
Date:   Mon Oct 20 16:31:20 2025 -0600

    Fix minor RISC-V testsuite failure
    
    This fixes reduc-8 yet again.  This time the required "a2" moved to the other source operand of the add.  So the regexp is further expanded to allow add anyreg,anyreg,a2 or add anyreg,a2,anyreg.
    
    gcc/testsuite
            * gcc.target/riscv/rvv/autovec/reduc/reduc-8.c: Adjust expected output.
    
    (cherry picked from commit f2b5e49c5968ef8fa28f9e24a0866437d6289b53)

Diff:
---
 gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc-8.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc-8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc-8.c
index 1e5dc236a184..15a1d6364538 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc-8.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/reduc/reduc-8.c
@@ -12,4 +12,4 @@ add_loop (int *x, int n, int res)
   return res;
 }
 
-/* { dg-final { scan-assembler-times {add\s+[a-x0-9]+,\s*[a-x0-9]+,a2} 1 } } */
+/* { dg-final { scan-assembler-times {add\s+[a-x0-9]+,\s*(?:a2,\s*[a-x0-9]+|[a-x0-9]+,\s*a2)} 1 } } */