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Allow reusing Scope temp variables #18

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merged 3 commits into from
May 16, 2024
Merged

Allow reusing Scope temp variables #18

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1342252
Allow reusing Scope temp variables
pettyjamesm May 16, 2024
c760595
Simplify ParameterizedType#equals
pettyjamesm May 16, 2024
263f2d5
Use ImmutableList.builderWithExpectedSize
pettyjamesm May 16, 2024
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11 changes: 3 additions & 8 deletions src/main/java/io/airlift/bytecode/ParameterizedType.java
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,7 @@ private ParameterizedType(Class<?> type, Class<?>... parameters)
this.className = getPathName(type);
this.simpleName = type.getSimpleName();

ImmutableList.Builder<String> builder = ImmutableList.builder();
ImmutableList.Builder<String> builder = ImmutableList.builderWithExpectedSize(parameters.length);
for (Class<?> parameter : parameters) {
builder.add(toInternalIdentifier(parameter));
}
Expand All @@ -128,7 +128,7 @@ private ParameterizedType(Class<?> type, ParameterizedType... parameters)
this.className = getPathName(type);
this.simpleName = type.getSimpleName();

ImmutableList.Builder<String> builder = ImmutableList.builder();
ImmutableList.Builder<String> builder = ImmutableList.builderWithExpectedSize(parameters.length);
for (ParameterizedType parameter : parameters) {
builder.add(parameter.toString());
}
Expand Down Expand Up @@ -220,12 +220,7 @@ public boolean equals(Object o)
}

ParameterizedType that = (ParameterizedType) o;

if (!type.equals(that.type)) {
return false;
}

return true;
return type.equals(that.type);
}

@Override
Expand Down
20 changes: 20 additions & 0 deletions src/main/java/io/airlift/bytecode/Scope.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,9 @@
import org.objectweb.asm.Type;

import java.util.ArrayList;
import java.util.Deque;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
Expand All @@ -33,6 +36,7 @@ public class Scope
private final Map<String, Variable> variables = new TreeMap<>();
private final Map<String, Variable> tempVariables = new TreeMap<>();
private final List<Variable> allVariables = new ArrayList<>();
private final Map<ParameterizedType, Deque<Variable>> releasedTempVariables = new HashMap<>();

private final Variable thisVariable;

Expand Down Expand Up @@ -73,6 +77,22 @@ public Variable createTempVariable(Class<?> type)
return variable;
}

public Variable getOrCreateTempVariable(Class<?> type)
{
Deque<Variable> typeVariables = releasedTempVariables.get(type(type));
if (typeVariables == null || typeVariables.isEmpty()) {
return createTempVariable(type);
}
return typeVariables.pop();
}

public void releaseTempVariableForReuse(Variable tempVariable)
{
requireNonNull(tempVariable, "tempVariable is null");
checkArgument(tempVariable == tempVariables.get(tempVariable.getName()), "invalid tempVariable release: %s", tempVariable);
releasedTempVariables.computeIfAbsent(tempVariable.getType(), ignored -> new LinkedList<>()).push(tempVariable);
}

public Variable getTempVariable(String name)
{
Variable variable = tempVariables.get(name);
Expand Down
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