From bda3c23af845d3abe38b81c37f275fc836cb539c Mon Sep 17 00:00:00 2001
From: "Jin,Zhonghui" <zhonghui.jin@intel.com>
Date: Fri, 3 Nov 2023 00:09:40 +0800
Subject: [PATCH] [Backport] 8265816: Handle new VectorMaskCast node for x86

Summary: 8265816: Handle new VectorMaskCast node for x86

Test Plan: ci jtreg

Reviewed-by: JoshuaZhuwj

Issue: https://github.com/dragonwell-project/dragonwell11/issues/597
---
 src/hotspot/cpu/x86/x86.ad | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/hotspot/cpu/x86/x86.ad b/src/hotspot/cpu/x86/x86.ad
index 3327b8497d5..6909fb9c9d8 100644
--- a/src/hotspot/cpu/x86/x86.ad
+++ b/src/hotspot/cpu/x86/x86.ad
@@ -7589,6 +7589,18 @@ instruct vstoreMask8B_evex(vec dst, vec src, immI_8 size) %{
   ins_pipe( pipe_slow );
 %}
 
+instruct vmaskcast(vec dst) %{
+  predicate((vector_length(n) == vector_length(n->in(1))) &&
+            (vector_length_in_bytes(n) == vector_length_in_bytes(n->in(1))));
+  match(Set dst (VectorMaskCast dst));
+  ins_cost(0);
+  format %{ "vector_mask_cast $dst" %}
+  ins_encode %{
+    // empty
+  %}
+  ins_pipe(empty);
+%}
+
 //-------------------------------- Load Iota Indices ----------------------------------
 
 instruct loadIotaIndices(vec dst, immI_0 src, rRegP scratch) %{