8005818: Shark: fix OSR for non-empty incoming stack

Reviewed-by: twisti
Contributed-by: NRoman Kennke <rkennke@redhat.com>

src/share/vm/shark/sharkCompiler.cpp

@@ -185,6 +185,9 @@ void SharkCompiler::compile_method(ciEnv*    env,
 
   // Build the LLVM IR for the method
   Function *function = SharkFunction::build(env, &builder, flow, name);
+  if (env->failing()) {
+    return;
+  }
 
   // Generate native code.  It's unpleasant that we have to drop into
   // the VM to do this -- it blocks safepoints -- but I can't see any

src/share/vm/shark/sharkFunction.cpp

@@ -77,6 +77,10 @@ void SharkFunction::initialize(const char *name) {
   // Walk the tree from the start block to determine which
   // blocks are entered and which blocks require phis
   SharkTopLevelBlock *start_block = block(flow()->start_block_num());
+  if (is_osr() && start_block->stack_depth_at_entry() != 0) {
+    env()->record_method_not_compilable("can't compile OSR block with incoming stack-depth > 0");
+    return;
+  }
   assert(start_block->start() == flow()->start_bci(), "blocks out of order");
   start_block->enter();
 

src/share/vm/shark/sharkInvariants.hpp

@@ -68,7 +68,7 @@ class SharkCompileInvariants : public ResourceObj {
   //
   // Accessing this directly is kind of ugly, so it's private.  Add
   // new accessors below if you need something from it.
- private:
+ protected:
   ciEnv* env() const {
     assert(_env != NULL, "env not available");
     return _env;