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8087128: C2: Disallow definition split on MachCopySpill nodes

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Reviewed-by: kvn
This commit is contained in:
Nils Eliasson 2019-02-14 14:31:32 +01:00
parent 29fc9b0f0e
commit 0a5047a326
1 changed files with 1 additions and 2 deletions

3
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