--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/stubs/Stub.java	Thu Nov 14 11:16:14 2019 -0800
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/stubs/Stub.java	Thu Nov 14 12:21:00 2019 -0800
@@ -27,6 +27,7 @@
 import static java.util.Collections.singletonList;
 import static org.graalvm.compiler.core.GraalCompiler.emitFrontEnd;
 import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC;
+import static org.graalvm.compiler.core.common.GraalOptions.RegisterPressure;
 import static org.graalvm.compiler.debug.DebugContext.DEFAULT_LOG_STREAM;
 import static org.graalvm.compiler.debug.DebugOptions.DebugStubsAndSnippets;
 import static org.graalvm.compiler.hotspot.HotSpotHostBackend.UNCOMMON_TRAP_HANDLER;
@@ -76,7 +77,7 @@
 
 /**
  * Base class for implementing some low level code providing the out-of-line slow path for a snippet
- * and/or a callee saved call to a HotSpot C/C++ runtime function or even a another compiled Java
+ * and/or a callee saved call to a HotSpot C/C++ runtime function or even another compiled Java
  * method.
  */
 public abstract class Stub {
@@ -135,7 +136,9 @@
      */
     public Stub(OptionValues options, HotSpotProviders providers, HotSpotForeignCallLinkage linkage) {
         this.linkage = linkage;
-        this.options = new OptionValues(options, GraalOptions.TraceInlining, GraalOptions.TraceInliningForStubsAndSnippets.getValue(options));
+        // The RegisterPressure flag can be ignored by a compilation that runs out of registers, so
+        // the stub compilation must ignore the flag so that all allocatable registers are saved.
+        this.options = new OptionValues(options, GraalOptions.TraceInlining, GraalOptions.TraceInliningForStubsAndSnippets.getValue(options), RegisterPressure, null);
         this.providers = providers;
     }