Add a HCurrentMethod node.

This enables register allocation for the current method, so
that users of it don't always load it from the stack.

Currently only used by HLoadClass. Will make follow-up
CLs for the other users.

Change-Id: If73324d85643102faba47fabbbd2755eb258c59c

1 files changed, 15 insertions, 0 deletions

diff --git a/compiler/optimizing/nodes.cc b/compiler/optimizing/nodes.cc
index 483c09e5a9..80d4b4a863 100644
--- a/compiler/optimizing/nodes.cc
+++ b/compiler/optimizing/nodes.cc
@@ -295,6 +295,19 @@ HNullConstant* HGraph::GetNullConstant() {
   return cached_null_constant_;
 }
 
+HCurrentMethod* HGraph::GetCurrentMethod() {
+  if (cached_current_method_ == nullptr) {
+    cached_current_method_ = new (arena_) HCurrentMethod();
+    if (entry_block_->GetFirstInstruction() == nullptr) {
+      entry_block_->AddInstruction(cached_current_method_);
+    } else {
+      entry_block_->InsertInstructionBefore(
+          cached_current_method_, entry_block_->GetFirstInstruction());
+    }
+  }
+  return cached_current_method_;
+}
+
 HConstant* HGraph::GetConstant(Primitive::Type type, int64_t value) {
   switch (type) {
     case Primitive::Type::kPrimBoolean:
@@ -1461,6 +1474,8 @@ void HGraph::InlineInto(HGraph* outer_graph, HInvoke* invoke) {
         DCHECK(parameter_index != last_input_index);
       }
       current->ReplaceWith(invoke->InputAt(parameter_index++));
+    } else if (current->IsCurrentMethod()) {
+      current->ReplaceWith(outer_graph->GetCurrentMethod());
     } else {
       DCHECK(current->IsGoto() || current->IsSuspendCheck());
       entry_block_->RemoveInstruction(current);