Mercurial > hg > truffle
diff graal/com.oracle.graal.java/src/com/oracle/graal/java/HIRFrameStateBuilder.java @ 19173:396ca3a22ee8
Perform analysis for locals changed in the loop and avoid creating phis for loop invariant locals.
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Fri, 06 Feb 2015 04:35:28 +0100 |
| parents | c2019f6e821b |
| children | 4cee43cd1315 |
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--- a/graal/com.oracle.graal.java/src/com/oracle/graal/java/HIRFrameStateBuilder.java Fri Feb 06 04:33:04 2015 +0100 +++ b/graal/com.oracle.graal.java/src/com/oracle/graal/java/HIRFrameStateBuilder.java Fri Feb 06 04:35:28 2015 +0100 @@ -31,6 +31,7 @@ import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.debug.*; +import com.oracle.graal.java.BciBlockMapping.LocalLiveness; import com.oracle.graal.java.GraphBuilderPlugins.ParameterPlugin; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; @@ -234,7 +235,7 @@ return currentValue; } else if (currentValue != otherValue) { - assert !(block instanceof LoopBeginNode) : "Phi functions for loop headers are create eagerly for all locals and stack slots"; + assert !(block instanceof LoopBeginNode) : "Phi functions for loop headers are create eagerly for changed locals and all stack slots"; if (otherValue == null || otherValue.isDeleted() || currentValue.getKind() != otherValue.getKind()) { return null; } @@ -271,9 +272,11 @@ } } - public void insertLoopPhis(LoopBeginNode loopBegin) { + public void insertLoopPhis(LocalLiveness liveness, int loopId, LoopBeginNode loopBegin) { for (int i = 0; i < localsSize(); i++) { - storeLocal(i, createLoopPhi(loopBegin, localAt(i))); + if (liveness.localIsChangedInLoop(loopId, i)) { + storeLocal(i, createLoopPhi(loopBegin, localAt(i))); + } } for (int i = 0; i < stackSize(); i++) { storeStack(i, createLoopPhi(loopBegin, stackAt(i)));