From 0a5047a3269eebad33628a440030404033e568f0 Mon Sep 17 00:00:00 2001
From: Nils Eliasson <neliasso@openjdk.org>
Date: Thu, 14 Feb 2019 14:31:32 +0100
Subject: [PATCH] 8087128: C2: Disallow definition split on MachCopySpill nodes
Reviewed-by: kvn
---
src/hotspot/share/opto/reg_split.cpp | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/src/hotspot/share/opto/reg_split.cpp b/src/hotspot/share/opto/reg_split.cpp
index 78789150c82..b1fd0c8bcc8 100644
--- a/src/hotspot/share/opto/reg_split.cpp
+++ b/src/hotspot/share/opto/reg_split.cpp
@@ -1192,9 +1192,8 @@ 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