src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.amd64/src/org/graalvm/compiler/hotspot/amd64/AMD64HotSpotEpilogueOp.java
changeset 47216 71c04702a3d5
parent 43972 1ade39b8381b
child 50858 2d3e99a72541
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.amd64/src/org/graalvm/compiler/hotspot/amd64/AMD64HotSpotEpilogueOp.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package org.graalvm.compiler.hotspot.amd64;
+
+import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
+import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK;
+import static jdk.vm.ci.amd64.AMD64.rbp;
+import static jdk.vm.ci.code.ValueUtil.asRegister;
+import static jdk.vm.ci.code.ValueUtil.isStackSlot;
+
+import org.graalvm.compiler.asm.amd64.AMD64Address;
+import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
+import org.graalvm.compiler.lir.LIRInstructionClass;
+import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;
+import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
+
+import jdk.vm.ci.code.Register;
+import jdk.vm.ci.meta.AllocatableValue;
+
+/**
+ * Superclass for operations that use the value of RBP saved in a method's prologue.
+ */
+abstract class AMD64HotSpotEpilogueOp extends AMD64LIRInstruction implements AMD64HotSpotRestoreRbpOp {
+
+    protected AMD64HotSpotEpilogueOp(LIRInstructionClass<? extends AMD64HotSpotEpilogueOp> c) {
+        super(c);
+    }
+
+    @Use({REG, STACK}) private AllocatableValue savedRbp = PLACEHOLDER;
+
+    protected void leaveFrameAndRestoreRbp(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
+        leaveFrameAndRestoreRbp(savedRbp, crb, masm);
+    }
+
+    static void leaveFrameAndRestoreRbp(AllocatableValue savedRbp, CompilationResultBuilder crb, AMD64MacroAssembler masm) {
+        if (isStackSlot(savedRbp)) {
+            // Restoring RBP from the stack must be done before the frame is removed
+            masm.movq(rbp, (AMD64Address) crb.asAddress(savedRbp));
+        } else {
+            Register framePointer = asRegister(savedRbp);
+            if (!framePointer.equals(rbp)) {
+                masm.movq(rbp, framePointer);
+            }
+        }
+        crb.frameContext.leave(crb);
+    }
+
+    @Override
+    public void setSavedRbp(AllocatableValue value) {
+        savedRbp = value;
+    }
+}