Changeset 183162 in webkit for trunk/Source/JavaScriptCore/dfg/DFGCPSRethreadingPhase.cpp

Timestamp:

Apr 22, 2015, 7:36:08 PM (10 years ago)

Author:

[email protected]

Message:

Nodes should have an optional epoch field
​https://bugs.webkit.org/show_bug.cgi?id=144084

Reviewed by Ryosuke Niwa and Mark Lam.

This makes it easier to do epoch-based analyses on nodes. I plan to do just that in
​https://bugs.webkit.org/show_bug.cgi?id=143735. Currently the epoch field is not yet
used.

• dfg/DFGCPSRethreadingPhase.cpp:

(JSC::DFG::CPSRethreadingPhase::canonicalizeGetLocalFor):

• dfg/DFGCSEPhase.cpp:
• dfg/DFGEpoch.h:

(JSC::DFG::Epoch::fromUnsigned):
(JSC::DFG::Epoch::toUnsigned):

• dfg/DFGGraph.cpp:

(JSC::DFG::Graph::clearReplacements):
(JSC::DFG::Graph::clearEpochs):

• dfg/DFGGraph.h:

(JSC::DFG::Graph::performSubstitutionForEdge):

• dfg/DFGNode.h:

(JSC::DFG::Node::Node):
(JSC::DFG::Node::replaceWith):
(JSC::DFG::Node::replacement):
(JSC::DFG::Node::setReplacement):
(JSC::DFG::Node::epoch):
(JSC::DFG::Node::setEpoch):

• dfg/DFGSSAConversionPhase.cpp:

(JSC::DFG::SSAConversionPhase::run):

File:

• trunk/Source/JavaScriptCore/dfg/DFGCPSRethreadingPhase.cpp (modified) (1 diff)

trunk/Source/JavaScriptCore/dfg/DFGCPSRethreadingPhase.cpp

@@ -195 +195 @@
             if (otherNode->op() == GetLocal) {
                 // Replace all references to this GetLocal with otherNode.
-                node->replacement = otherNode;
+                node->setReplacement(otherNode);
                 return;
             }
             
             ASSERT(otherNode->op() == SetLocal);
-            node->replacement = otherNode->child1().node();
+            node->setReplacement(otherNode->child1().node());
             return;
         }