# HG changeset patch
# User Doug Simon <doug.simon@oracle.com>
# Date 1387828654 -3600
# Node ID e6309fde98c8171f5e9829a20f9396686b53b0d1
# Parent  4a3628c79ff973636989daf7c4ea99f6f1941c1a
exposed ForceUnreachable to Graal and used it when emitting safepoint polling code

diff -r 4a3628c79ff9 -r e6309fde98c8 graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotSafepointOp.java
--- a/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotSafepointOp.java	Mon Dec 23 12:55:14 2013 +0100
+++ b/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotSafepointOp.java	Mon Dec 23 20:57:34 2013 +0100
@@ -23,11 +23,11 @@
 package com.oracle.graal.hotspot.amd64;
 
 import static com.oracle.graal.amd64.AMD64.*;
+import static com.oracle.graal.asm.NumUtil.*;
 import static com.oracle.graal.hotspot.bridge.Marks.*;
 
 import com.oracle.graal.api.code.*;
 import com.oracle.graal.api.meta.*;
-import com.oracle.graal.asm.*;
 import com.oracle.graal.asm.amd64.*;
 import com.oracle.graal.hotspot.*;
 import com.oracle.graal.lir.*;
@@ -68,8 +68,7 @@
      */
     private static boolean isPollingPageFar(HotSpotVMConfig config) {
         final long pollingPageAddress = config.safepointPollingAddress;
-        // TODO return ForceUnreachable ||
-        return !NumUtil.isInt(pollingPageAddress - config.codeCacheLowBoundary()) || !NumUtil.isInt(pollingPageAddress - config.codeCacheHighBoundary());
+        return config.forceUnreachable || !isInt(pollingPageAddress - config.codeCacheLowBoundary()) || !isInt(pollingPageAddress - config.codeCacheHighBoundary());
     }
 
     public static void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler asm, HotSpotVMConfig config, boolean atReturn, LIRFrameState state, Register scratch) {
diff -r 4a3628c79ff9 -r e6309fde98c8 graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotVMConfig.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotVMConfig.java	Mon Dec 23 12:55:14 2013 +0100
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotVMConfig.java	Mon Dec 23 20:57:34 2013 +0100
@@ -667,6 +667,7 @@
     @HotSpotVMFlag(name = "PrintCompilation") @Stable public boolean printCompilation;
     @HotSpotVMFlag(name = "PrintInlining") @Stable public boolean printInlining;
     @HotSpotVMFlag(name = "GraalUseFastLocking") @Stable public boolean useFastLocking;
+    @HotSpotVMFlag(name = "ForceUnreachable") @Stable public boolean forceUnreachable;
 
     @HotSpotVMFlag(name = "UseTLAB") @Stable public boolean useTLAB;
     @HotSpotVMFlag(name = "UseBiasedLocking") @Stable public boolean useBiasedLocking;