[fullcodegen] Implement control flow across do-expressions.

src/full-codegen/arm/full-codegen-arm.cc

Index: src/full-codegen/arm/full-codegen-arm.cc
diff --git a/src/full-codegen/arm/full-codegen-arm.cc b/src/full-codegen/arm/full-codegen-arm.cc
index 45a60e5377dbc26e61e43ff4912943ec990a5ef3..dde076b74ff59f95321ef93b6455dffecb5812c1 100644
--- a/src/full-codegen/arm/full-codegen-arm.cc
+++ b/src/full-codegen/arm/full-codegen-arm.cc
@@ -994,14 +994,14 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
 
   FeedbackVectorSlot slot = stmt->ForInFeedbackSlot();
 
-  Label loop, exit;
-  ForIn loop_statement(this, stmt);
-  increment_loop_depth();
-
   // Get the object to enumerate over.
   SetExpressionAsStatementPosition(stmt->enumerable());
   VisitForAccumulatorValue(stmt->enumerable());
-  OperandStackDepthIncrement(ForIn::kElementCount);
+  OperandStackDepthIncrement(5);
+
+  Label loop, exit;
+  Iteration loop_statement(this, stmt);
+  increment_loop_depth();
 
   // If the object is null or undefined, skip over the loop, otherwise convert
   // it to a JS receiver.  See ECMA-262 version 5, section 12.6.4.
@@ -1888,7 +1888,7 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
     case Yield::kSuspend:
       // Pop value from top-of-stack slot; box result into result register.
       EmitCreateIteratorResult(false);
-      __ push(result_register());
+      PushOperand(result_register());
       // Fall through.
     case Yield::kInitial: {
       Label suspend, continuation, post_runtime, resume;
@@ -1907,6 +1907,7 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       EmitUnwindAndReturn();
 
       __ bind(&suspend);
+      OperandStackDepthIncrement(1);  // Not popped on this path.
       VisitForAccumulatorValue(expr->generator_object());
       DCHECK(continuation.pos() > 0 && Smi::IsValid(continuation.pos()));
       __ mov(r1, Operand(Smi::FromInt(continuation.pos())));
@@ -1932,7 +1933,6 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
 
     case Yield::kFinal: {
       // Pop value from top-of-stack slot, box result into result register.
-      OperandStackDepthDecrement(1);
       EmitCreateIteratorResult(true);
       EmitUnwindAndReturn();
       break;
@@ -2081,7 +2081,7 @@ void FullCodeGenerator::EmitCreateIteratorResult(bool done) {
 
   __ bind(&done_allocate);
   __ LoadNativeContextSlot(Context::ITERATOR_RESULT_MAP_INDEX, r1);
-  __ pop(r2);
+  PopOperand(r2);
   __ LoadRoot(r3,
               done ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex);
   __ LoadRoot(r4, Heap::kEmptyFixedArrayRootIndex);