8345669: RISC-V: fix client build failure due to AlignVector after JDK-8343827

Reviewed-by: fyang
Backport-of: a24b08f

Author: Hamlin Li

src/hotspot/cpu/riscv/vm_version_riscv.cpp

@@ -154,10 +154,6 @@ void VM_Version::common_initialize() {
       unaligned_access.value() != MISALIGNED_FAST);
   }
 
-  if (FLAG_IS_DEFAULT(AlignVector)) {
-    FLAG_SET_DEFAULT(AlignVector, AvoidUnalignedAccesses);
-  }
-
   // See JDK-8026049
   // This machine has fast unaligned memory accesses
   if (FLAG_IS_DEFAULT(UseUnalignedAccesses)) {
@@ -440,6 +436,10 @@ void VM_Version::c2_initialize() {
     warning("AES/CTR intrinsics are not available on this CPU");
     FLAG_SET_DEFAULT(UseAESCTRIntrinsics, false);
   }
+
+  if (FLAG_IS_DEFAULT(AlignVector)) {
+    FLAG_SET_DEFAULT(AlignVector, AvoidUnalignedAccesses);
+  }
 }
 
 #endif // COMPILER2