[coverage] Block coverage with support for IfStatements

src/compiler/bytecode-graph-builder.cc

Index: src/compiler/bytecode-graph-builder.cc
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index 14c97c832f18c2e9aa329f44c3e7838c6f31bfd3..862762e5b208c70042b5d90a48350fd28728f8e9 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -2224,6 +2224,18 @@ void BytecodeGraphBuilder::VisitDebugger() {
 DEBUG_BREAK_BYTECODE_LIST(DEBUG_BREAK);
 #undef DEBUG_BREAK
 
+void BytecodeGraphBuilder::VisitIncBlockCounter() {
+  DCHECK(FLAG_block_coverage);
+
+  Node* slot = jsgraph()->Constant(bytecode_iterator().GetImmediateOperand(0));
+  Node* vector = jsgraph()->Constant(feedback_vector());
+
+  const Operator* op = javascript()->CallRuntime(Runtime::kIncBlockCounter);
+
+  Node* node = NewNode(op, vector, slot);
+  environment()->RecordAfterState(node, Environment::kAttachFrameState);

[jgruber, 2017/06/01 11:56:27]

Ross: Is RecordAfterState needed here?

+}
+
 void BytecodeGraphBuilder::VisitForInPrepare() {
   PrepareEagerCheckpoint();
   Node* receiver =