# HG changeset patch
# User Gilles Duboscq <duboscq@ssw.jku.at>
# Date 1396531581 -7200
# Node ID be6fc21b25f8d77c4391bac28478be2c89ae3291
# Parent  eabad1ea62ce31e77b5676b508578c323fbfb981
Add possibility to have HotSpot linkages which are LEAF but still require a last_java_sp

diff -r eabad1ea62ce -r be6fc21b25f8 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 Apr 03 14:54:08 2014 +0200
+++ b/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotLIRGenerator.java	Thu Apr 03 15:26:21 2014 +0200
@@ -189,7 +189,8 @@
 
     @Override
     public Variable emitForeignCall(ForeignCallLinkage linkage, DeoptimizingNode info, Value... args) {
-        boolean destroysRegisters = linkage.destroysRegisters();
+        HotSpotForeignCallLinkage hotspotLinkage = (HotSpotForeignCallLinkage) linkage;
+        boolean destroysRegisters = hotspotLinkage.destroysRegisters();
 
         AMD64SaveRegistersOp save = null;
         StackSlot[] savedRegisterLocations = null;
@@ -210,15 +211,20 @@
         }
 
         Variable result;
+        DeoptimizingNode deoptInfo = null;
+        if (hotspotLinkage.canDeoptimize()) {
+            deoptInfo = info;
+            assert deoptInfo != null || getStub() != null;
+            assert hotspotLinkage.needsJavaFrameAnchor();
+        }
 
-        if (linkage.canDeoptimize()) {
-            assert info != null || ((AMD64HotSpotLIRGenerationResult) getResult()).getStub() != null;
+        if (hotspotLinkage.needsJavaFrameAnchor()) {
             Register thread = getProviders().getRegisters().getThreadRegister();
             append(new AMD64HotSpotCRuntimeCallPrologueOp(config.threadLastJavaSpOffset(), thread));
-            result = super.emitForeignCall(linkage, info, args);
+            result = super.emitForeignCall(hotspotLinkage, deoptInfo, args);
             append(new AMD64HotSpotCRuntimeCallEpilogueOp(config.threadLastJavaSpOffset(), config.threadLastJavaFpOffset(), thread));
         } else {
-            result = super.emitForeignCall(linkage, info, args);
+            result = super.emitForeignCall(hotspotLinkage, deoptInfo, args);
         }
 
         if (destroysRegisters) {
diff -r eabad1ea62ce -r be6fc21b25f8 graal/com.oracle.graal.hotspot.sparc/src/com/oracle/graal/hotspot/sparc/SPARCHotSpotLIRGenerator.java
--- a/graal/com.oracle.graal.hotspot.sparc/src/com/oracle/graal/hotspot/sparc/SPARCHotSpotLIRGenerator.java	Thu Apr 03 14:54:08 2014 +0200
+++ b/graal/com.oracle.graal.hotspot.sparc/src/com/oracle/graal/hotspot/sparc/SPARCHotSpotLIRGenerator.java	Thu Apr 03 15:26:21 2014 +0200
@@ -80,18 +80,23 @@
 
     @Override
     public Variable emitForeignCall(ForeignCallLinkage linkage, DeoptimizingNode info, Value... args) {
+        HotSpotForeignCallLinkage hotspotLinkage = (HotSpotForeignCallLinkage) linkage;
         Variable result;
+        DeoptimizingNode deoptInfo = null;
+        if (hotspotLinkage.canDeoptimize()) {
+            deoptInfo = info;
+            assert deoptInfo != null || getStub() != null;
+        }
 
-        if (linkage.canDeoptimize()) {
-            assert info != null || getStub() != null;
+        if (hotspotLinkage.needsJavaFrameAnchor()) {
             HotSpotRegistersProvider registers = getProviders().getRegisters();
             Register thread = registers.getThreadRegister();
             Register stackPointer = registers.getStackPointerRegister();
             append(new SPARCHotSpotCRuntimeCallPrologueOp(config.threadLastJavaSpOffset(), thread, stackPointer));
-            result = super.emitForeignCall(linkage, info, args);
+            result = super.emitForeignCall(hotspotLinkage, deoptInfo, args);
             append(new SPARCHotSpotCRuntimeCallEpilogueOp(config.threadLastJavaSpOffset(), config.threadLastJavaPcOffset(), config.threadJavaFrameAnchorFlagsOffset(), thread));
         } else {
-            result = super.emitForeignCall(linkage, null, args);
+            result = super.emitForeignCall(hotspotLinkage, deoptInfo, args);
         }
 
         return result;
diff -r eabad1ea62ce -r be6fc21b25f8 graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotForeignCallLinkage.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotForeignCallLinkage.java	Thu Apr 03 14:54:08 2014 +0200
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotForeignCallLinkage.java	Thu Apr 03 15:26:21 2014 +0200
@@ -58,6 +58,7 @@
     public enum Transition {
         LEAF_NOFP,
         LEAF,
+        LEAF_SP,
         NOT_LEAF;
     }
 
@@ -110,7 +111,7 @@
 
     /**
      * Creates a {@link HotSpotForeignCallLinkage}.
-     * 
+     *
      * @param descriptor the descriptor of the call
      * @param address the address of the code to call
      * @param effect specifies if the call destroys or preserves all registers (apart from
@@ -264,4 +265,8 @@
     public boolean mayContainFP() {
         return transition != Transition.LEAF_NOFP;
     }
+
+    public boolean needsJavaFrameAnchor() {
+        return canDeoptimize() || transition == Transition.LEAF_SP;
+    }
 }