From 892224268d14e39e04dd7209f38b674b6978f05a Mon Sep 17 00:00:00 2001
From: neliasso <none@none>
Date: Thu, 14 Feb 2019 14:31:32 +0100
Subject: [PATCH] 8087128: C2: Disallow definition split on MachCopySpill nodes
 Reviewed-by: kvn

---
 src/share/vm/opto/reg_split.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/share/vm/opto/reg_split.cpp b/src/share/vm/opto/reg_split.cpp
index af798914a..a132f1f9f 100644
--- a/src/share/vm/opto/reg_split.cpp
+++ b/src/share/vm/opto/reg_split.cpp
@@ -1171,9 +1171,8 @@ uint PhaseChaitin::Split(uint maxlrg, ResourceArea* split_arena) {
               (deflrg._direct_conflict || deflrg._must_spill)) ||
              // Check for LRG being up in a register and we are inside a high
              // pressure area.  Spill it down immediately.
-             (defup && is_high_pressure(b,&deflrg,insidx))) ) {
+             (defup && is_high_pressure(b,&deflrg,insidx) && !n->is_SpillCopy())) ) {
           assert( !n->rematerialize(), "" );
-          assert( !n->is_SpillCopy(), "" );
           // Do a split at the def site.
           maxlrg = split_DEF( n, b, insidx, maxlrg, Reachblock, debug_defs, splits, slidx );
           // If it wasn't split bail
-- 
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