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changeset 22826:b3fdc3758e07

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LinearScan: add LIROptLSRAEliminateSpillMoves option.
author Josef Eisl <josef.eisl@jku.at>
date Tue, 13 Oct 2015 11:24:41 +0200
parents c7753ef3467e
children eb99bf98f076
files graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LinearScanEliminateSpillMovePhase.java
diffstat 1 files changed, 13 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LinearScanEliminateSpillMovePhase.java	Thu Oct 15 11:58:34 2015 +0200
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LinearScanEliminateSpillMovePhase.java	Tue Oct 13 11:24:41 2015 +0200
@@ -24,6 +24,7 @@
 
 import static com.oracle.graal.compiler.common.GraalOptions.DetailedAsserts;
 import static com.oracle.graal.lir.LIRValueUtil.isVariable;
+import static com.oracle.graal.lir.phases.LIRPhase.Options.LIROptimization;
 import static jdk.vm.ci.code.ValueUtil.isRegister;
 import static jdk.vm.ci.code.ValueUtil.isStackSlotValue;
 
@@ -31,6 +32,10 @@
 
 import jdk.vm.ci.code.TargetDescription;
 import jdk.vm.ci.meta.AllocatableValue;
+import jdk.vm.ci.options.NestedBooleanOptionValue;
+import jdk.vm.ci.options.Option;
+import jdk.vm.ci.options.OptionType;
+import jdk.vm.ci.options.OptionValue;
 
 import com.oracle.graal.compiler.common.alloc.RegisterAllocationConfig;
 import com.oracle.graal.compiler.common.cfg.AbstractBlockBase;
@@ -49,6 +54,13 @@
 
 public class LinearScanEliminateSpillMovePhase extends AllocationPhase {
 
+    public static class Options {
+        // @formatter:off
+        @Option(help = "Enable spill move elimination.", type = OptionType.Debug)
+        public static final OptionValue<Boolean> LIROptLSRAEliminateSpillMoves = new NestedBooleanOptionValue(LIROptimization, true);
+        // @formatter:on
+    }
+
     private static final IntervalPredicate mustStoreAtDefinition = new LinearScan.IntervalPredicate() {
 
         @Override
@@ -111,7 +123,7 @@
                              * be correct. Only moves that have been inserted by LinearScan can be
                              * removed.
                              */
-                            if (canEliminateSpillMove(block, move)) {
+                            if (Options.LIROptLSRAEliminateSpillMoves.getValue() && canEliminateSpillMove(block, move)) {
                                 /*
                                  * Move target is a stack slot that is always correct, so eliminate
                                  * instruction.