diff options
Diffstat (limited to 'chapter17b/src/main')
| -rw-r--r-- | chapter17b/src/main/java/com/seaofnodes/simple/node/LoadNode.java | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/chapter17b/src/main/java/com/seaofnodes/simple/node/LoadNode.java b/chapter17b/src/main/java/com/seaofnodes/simple/node/LoadNode.java index eaab680c..98d076b8 100644 --- a/chapter17b/src/main/java/com/seaofnodes/simple/node/LoadNode.java +++ b/chapter17b/src/main/java/com/seaofnodes/simple/node/LoadNode.java @@ -128,6 +128,9 @@ public class LoadNode extends MemOpNode { // else ptr.x = e1; : e1; // val = ptr.x; ptr.x = val; if( mem() instanceof MemPhiNode memphi && memphi.region()._type == Type.CONTROL && memphi.nIns()== 3 && + // Retain control on both copies only if it dominates both paths. + // The Region itself, or a later range check, cannot move to its inputs. + (in(0)==null || cfg0().domLCA(memphi.region().idom(this),this)==cfg0()) && // Offset can be hoisted off() instanceof ConstantNode && // Pointer can be hoisted |