JDK-8136547 : CountedLoopEndNode::phi() should only return PhiNodes
- Type: Enhancement
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 9,10
- Priority: P4
- Status: Closed
- Resolution: Duplicate
- Submitted: 2015-09-15
- Updated: 2017-08-29
- Resolved: 2017-08-29
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| JDK 11 |
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11Resolved  |
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Description
CountedLoopEndNode::phi() currently does not check if the node is a PhiNode and may therefore return other nodes (see JDK-8134739). We should change the implementation to always either return a PhiNode or NULL (use tmp->in(1)->as_Phi()) and adapt the call sites accordingly. For example, PhiNode::Value() currently expects phi() to return "something" even if the loop does not contain a PhiNode.
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