Throw a TypeError when calling "next" method of a newly created generator with a value

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index b787f69c50cb3a79bda22b3cd27de0dcb8c5ff03..3dc11a5c72851bd20270668bb3cc589c800fbee4 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -2000,6 +2000,10 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       ASSERT(continuation.pos() > 0 && Smi::IsValid(continuation.pos()));
       __ mov(r1, Operand(Smi::FromInt(continuation.pos())));
       __ str(r1, FieldMemOperand(r0, JSGeneratorObject::kContinuationOffset));
+      if (expr->yield_kind() == Yield::INITIAL) {
+        __ str(r1,
+               FieldMemOperand(r0, JSGeneratorObject::kSuspendedStartOffset));
+      }
       __ str(cp, FieldMemOperand(r0, JSGeneratorObject::kContextOffset));
       __ mov(r1, cp);
       __ RecordWriteField(r0, JSGeneratorObject::kContextOffset, r1, r2,
@@ -2126,13 +2130,18 @@ void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
   __ pop(r1);
 
   // Check generator state.
-  Label wrong_state, closed_state, done;
+  Label wrong_state, closed_state, suspended_start_state, resume_state, done;
   __ ldr(r3, FieldMemOperand(r1, JSGeneratorObject::kContinuationOffset));
   STATIC_ASSERT(JSGeneratorObject::kGeneratorExecuting < 0);
   STATIC_ASSERT(JSGeneratorObject::kGeneratorClosed == 0);
   __ cmp(r3, Operand(Smi::FromInt(0)));
   __ b(eq, &closed_state);
   __ b(lt, &wrong_state);
+  __ ldr(r2, FieldMemOperand(r1, JSGeneratorObject::kSuspendedStartOffset));
+  __ cmp(r3, r2);
+  __ b(eq, &suspended_start_state);
+
+  __ bind(&resume_state);
 
   // Load suspended function and context.
   __ ldr(cp, FieldMemOperand(r1, JSGeneratorObject::kContextOffset));
@@ -2207,6 +2216,30 @@ void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
   // Not reached: the runtime call returns elsewhere.
   __ stop("not-reached");
 
+  // Throw the provided value.
+  Label throw_provided_value;
+  __ bind(&throw_provided_value);
+  if (resume_mode != JSGeneratorObject::NEXT) {
+    __ push(r0);
+    __ CallRuntime(Runtime::kThrow, 1);
+    __ jmp(&done);
+  }
+
+  // Reach here when calling initial resume to a generator.
+  __ bind(&suspended_start_state);
+  if (resume_mode == JSGeneratorObject::NEXT) {
+    // When value is provided and it is not undefined, throw error.
+    __ CompareRoot(r0, Heap::kUndefinedValueRootIndex);
+    __ b(eq, &resume_state);
+    __ CallRuntime(Runtime::kThrowGeneratorStartError, 1);
+    __ jmp(&done);
+  } else {
+    // Make generator's state to "closed".
+    __ mov(r2, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorClosed)));
+    __ str(r2, FieldMemOperand(r1, JSGeneratorObject::kContinuationOffset));
+    __ jmp(&throw_provided_value);
+  }
+
   // Reach here when generator is closed.
   __ bind(&closed_state);
   if (resume_mode == JSGeneratorObject::NEXT) {
@@ -2215,12 +2248,10 @@ void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
     __ push(r2);
     // Pop value from top-of-stack slot; box result into result register.
     EmitCreateIteratorResult(true);
+    __ jmp(&done);
   } else {
-    // Throw the provided value.
-    __ push(r0);
-    __ CallRuntime(Runtime::kThrow, 1);
+    __ jmp(&throw_provided_value);
   }
-  __ jmp(&done);
 
   // Throw error if we attempt to operate on a running generator.
   __ bind(&wrong_state);