# HG changeset patch
# User Josef Eisl <josef.eisl@jku.at>
# Date 1431425035 -7200
# Node ID b8dcf353b822bd63c31f53515cdfae5df714df38
# Parent  8cef2c3f389b2c11cc995e363c0b0a6a7dc6c8aa
LinearScan: encapsulate intervals.

diff -r 8cef2c3f389b -r b8dcf353b822 graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LifetimeAnalysis.java
--- a/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LifetimeAnalysis.java	Tue May 12 11:55:11 2015 +0200
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LifetimeAnalysis.java	Tue May 12 12:03:55 2015 +0200
@@ -81,8 +81,7 @@
      */
     void numberInstructions() {
 
-        allocator.intervalsSize = allocator.operandSize();
-        allocator.intervals = new Interval[allocator.intervalsSize + (allocator.intervalsSize >> LinearScan.SPLIT_INTERVALS_CAPACITY_RIGHT_SHIFT)];
+        allocator.initIntervals();
 
         ValueConsumer setVariableConsumer = (value, mode, flags) -> {
             if (isVariable(value)) {
@@ -712,7 +711,7 @@
              * Add the range [0, 1] to all fixed intervals. the register allocator need not handle
              * unhandled fixed intervals.
              */
-            for (Interval interval : allocator.intervals) {
+            for (Interval interval : allocator.intervals()) {
                 if (interval != null && isRegister(interval.operand)) {
                     interval.addRange(0, 1);
                 }
diff -r 8cef2c3f389b -r b8dcf353b822 graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LinearScan.java
--- a/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LinearScan.java	Tue May 12 11:55:11 2015 +0200
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LinearScan.java	Tue May 12 12:03:55 2015 +0200
@@ -117,26 +117,24 @@
      */
     final List<? extends AbstractBlockBase<?>> sortedBlocks;
 
-    /**
-     * Map from {@linkplain #operandNumber(Value) operand numbers} to intervals.
-     */
-    Interval[] intervals;
+    /** @see #intervals() */
+    private Interval[] intervals;
 
     /**
      * The number of valid entries in {@link #intervals}.
      */
-    int intervalsSize;
+    private int intervalsSize;
 
     /**
      * The index of the first entry in {@link #intervals} for a
      * {@linkplain #createDerivedInterval(Interval) derived interval}.
      */
-    int firstDerivedIntervalIndex = -1;
+    private int firstDerivedIntervalIndex = -1;
 
     /**
      * Intervals sorted by {@link Interval#from()}.
      */
-    Interval[] sortedIntervals;
+    private Interval[] sortedIntervals;
 
     /**
      * Map from an instruction {@linkplain LIRInstruction#id id} to the instruction. Entries should
@@ -290,6 +288,18 @@
     }
 
     /**
+     * Map from {@linkplain #operandNumber(Value) operand numbers} to intervals.
+     */
+    Interval[] intervals() {
+        return intervals;
+    }
+
+    void initIntervals() {
+        intervalsSize = operandSize();
+        intervals = new Interval[intervalsSize + (intervalsSize >> SPLIT_INTERVALS_CAPACITY_RIGHT_SHIFT)];
+    }
+
+    /**
      * Creates a new interval.
      *
      * @param operand the operand for the interval
diff -r 8cef2c3f389b -r b8dcf353b822 graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/OptimizeSpillPosition.java
--- a/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/OptimizeSpillPosition.java	Tue May 12 11:55:11 2015 +0200
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/OptimizeSpillPosition.java	Tue May 12 12:03:55 2015 +0200
@@ -57,7 +57,7 @@
 
     private void optimizeSpillPosition() {
         LIRInsertionBuffer[] insertionBuffers = new LIRInsertionBuffer[allocator.ir.linearScanOrder().size()];
-        for (Interval interval : allocator.intervals) {
+        for (Interval interval : allocator.intervals()) {
             if (interval != null && interval.isSplitParent() && interval.spillState() == SpillState.SpillInDominator) {
                 AbstractBlockBase<?> defBlock = allocator.blockForId(interval.spillDefinitionPos());
                 AbstractBlockBase<?> spillBlock = null;