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changeset 10747:3811d04d933e

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Do not re-compress oops that are already compressed.
author Roland Schatz <roland.schatz@oracle.com>
date Mon, 15 Jul 2013 12:02:15 +0200
parents 257e2455270e
children a5c9bc1f28fb 64740220db85
files graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotLIRGenerator.java
diffstat 1 files changed, 7 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotLIRGenerator.java	Mon Jul 15 10:59:14 2013 +0200
+++ b/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotLIRGenerator.java	Mon Jul 15 12:02:15 2013 +0200
@@ -449,8 +449,13 @@
         Variable input = load(inputVal);
         if (isCompressCandidate(access)) {
             if (runtime().config.useCompressedOops && kind == Kind.Object) {
-                Variable scratch = newVariable(Kind.Long);
-                append(new StoreCompressedPointer(kind, storeAddress, input, scratch, state, runtime().config.narrowOopBase, runtime().config.narrowOopShift, runtime().config.logMinObjAlignment));
+                if (input.getKind() == Kind.Object) {
+                    Variable scratch = newVariable(Kind.Long);
+                    append(new StoreCompressedPointer(kind, storeAddress, input, scratch, state, runtime().config.narrowOopBase, runtime().config.narrowOopShift, runtime().config.logMinObjAlignment));
+                } else {
+                    // the input oop is already compressed
+                    append(new StoreOp(input.getKind(), storeAddress, input, state));
+                }
             } else if (runtime().config.useCompressedKlassPointers && kind == Kind.Long) {
                 Variable scratch = newVariable(Kind.Long);
                 append(new StoreCompressedPointer(kind, storeAddress, input, scratch, state, runtime().config.narrowKlassBase, runtime().config.narrowKlassShift, runtime().config.logKlassAlignment));