# HG changeset patch
# User Josef Eisl <josef.eisl@jku.at>
# Date 1414067254 -7200
# Node ID 5afaa02c53dd3e5aca0bef73b82baffd45cbe84a
# Parent  c656c5772cfaaf1dd42b4218f58068be6013890a
Introduce AMD64FrameMapBuilder to support special stack slot allocation for RBP.

diff -r c656c5772cfa -r 5afaa02c53dd graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotBackend.java
--- a/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotBackend.java	Thu Oct 23 13:13:16 2014 +0200
+++ b/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotBackend.java	Thu Oct 23 14:27:34 2014 +0200
@@ -67,7 +67,7 @@
 
     @Override
     public FrameMapBuilder newFrameMapBuilder(RegisterConfig registerConfig) {
-        return new ForwardingFrameMapBuilder(this::newFrameMap, getCodeCache(), registerConfig);
+        return new AMD64FrameMapBuilder(this::newFrameMap, getCodeCache(), registerConfig);
     }
 
     @Override
diff -r c656c5772cfa -r 5afaa02c53dd graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotLIRGenerator.java
--- a/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotLIRGenerator.java	Thu Oct 23 13:13:16 2014 +0200
+++ b/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotLIRGenerator.java	Thu Oct 23 14:27:34 2014 +0200
@@ -92,8 +92,8 @@
 
         public SaveRbp(NoOp placeholder) {
             this.placeholder = placeholder;
-            this.reservedSlot = getResult().getFrameMapBuilder().allocateSpillSlot(LIRKind.value(Kind.Long));
-            assert reservedSlot.getRawOffset() == -16 : reservedSlot.getRawOffset();
+            AMD64FrameMapBuilder frameMapBuilder = (AMD64FrameMapBuilder) getResult().getFrameMapBuilder();
+            this.reservedSlot = frameMapBuilder.allocateRBPSpillSlot();
         }
 
         /**
diff -r c656c5772cfa -r 5afaa02c53dd graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64FrameMapBuilder.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64FrameMapBuilder.java	Thu Oct 23 14:27:34 2014 +0200
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2014, 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 com.oracle.graal.lir.amd64;
+
+import com.oracle.graal.api.code.*;
+import com.oracle.graal.api.meta.*;
+import com.oracle.graal.lir.*;
+
+public class AMD64FrameMapBuilder extends ForwardingFrameMapBuilder {
+
+    public AMD64FrameMapBuilder(FrameMapFactory factory, CodeCacheProvider codeCache, RegisterConfig registerConfig) {
+        super(factory, codeCache, registerConfig);
+    }
+
+    /**
+     * For non-leaf methods, RBP is preserved in the special stack slot required by the HotSpot
+     * runtime for walking/inspecting frames of such methods.
+     */
+    public StackSlot allocateRBPSpillSlot() {
+        StackSlot reservedSlot = allocateSpillSlot(LIRKind.value(Kind.Long));
+        assert reservedSlot.getRawOffset() == -16 : reservedSlot.getRawOffset();
+        return reservedSlot;
+    }
+
+}