[Backport] 8277777: [Vector API] assert(r->is_XMMRegister()) failed: …

…must be in x86_32.ad

Summary: 8277777: [Vector API] assert(r->is_XMMRegister()) failed: must be in x86_32.ad

Test Plan: ci jtreg

Reviewed-by: JoshuaZhuwj

Issue: dragonwell-project#569

src/hotspot/cpu/x86/x86_32.ad

@@ -763,6 +763,7 @@ static enum RC rc_class( OptoReg::Name reg ) {
     assert(UseSSE < 2, "shouldn't be used in SSE2+ mode");
     return rc_float;
   }
+  if (r->is_KRegister()) return rc_kreg;
   assert(r->is_XMMRegister(), "must be");
   return rc_xmm;
 }
@@ -1285,26 +1286,6 @@ uint MachSpillCopyNode::implementation( CodeBuffer *cbuf, PhaseRegAlloc *ra_, bo
     return size;
   }
 
-  assert( size > 0, "missed a case" );
-
-  // --------------------------------------------------------------------
-  // Check for second bits still needing moving.
-  if( src_second == dst_second )
-    return size;               // Self copy; no move
-  assert( src_second_rc != rc_bad && dst_second_rc != rc_bad, "src_second & dst_second cannot be Bad" );
-
-  // Check for second word int-int move
-  if( src_second_rc == rc_int && dst_second_rc == rc_int )
-    return impl_mov_helper(cbuf,do_size,src_second,dst_second,size, st);
-
-  // Check for second word integer store
-  if( src_second_rc == rc_int && dst_second_rc == rc_stack )
-    return impl_helper(cbuf,do_size,false,ra_->reg2offset(dst_second),src_second,0x89,"MOV ",size, st);
-
-  // Check for second word integer load
-  if( dst_second_rc == rc_int && src_second_rc == rc_stack )
-    return impl_helper(cbuf,do_size,true ,ra_->reg2offset(src_second),dst_second,0x8B,"MOV ",size, st);
-
   // AVX-512 opmask specific spilling.
   if (src_first_rc == rc_stack && dst_first_rc == rc_kreg) {
     assert((src_first & 1) == 0 && src_first + 1 == src_second, "invalid register pair");
@@ -1342,6 +1323,26 @@ uint MachSpillCopyNode::implementation( CodeBuffer *cbuf, PhaseRegAlloc *ra_, bo
     return 0;
   }
 
+  assert( size > 0, "missed a case" );
+
+  // --------------------------------------------------------------------
+  // Check for second bits still needing moving.
+  if( src_second == dst_second )
+    return size;               // Self copy; no move
+  assert( src_second_rc != rc_bad && dst_second_rc != rc_bad, "src_second & dst_second cannot be Bad" );
+
+  // Check for second word int-int move
+  if( src_second_rc == rc_int && dst_second_rc == rc_int )
+    return impl_mov_helper(cbuf,do_size,src_second,dst_second,size, st);
+
+  // Check for second word integer store
+  if( src_second_rc == rc_int && dst_second_rc == rc_stack )
+    return impl_helper(cbuf,do_size,false,ra_->reg2offset(dst_second),src_second,0x89,"MOV ",size, st);
+
+  // Check for second word integer load
+  if( dst_second_rc == rc_int && src_second_rc == rc_stack )
+    return impl_helper(cbuf,do_size,true ,ra_->reg2offset(src_second),dst_second,0x8B,"MOV ",size, st);
+
   Unimplemented();
   return 0; // Mute compiler
 }