[fullcodegen] Remove deprecated generator implementation.

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index a6eedbd8b853a89549781f59181b93008966690d..f014951ca5c36fc04b690d39fb6c17ed56485b60 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -1732,57 +1732,8 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
 
 
 void FullCodeGenerator::VisitYield(Yield* expr) {
-  Comment cmnt(masm_, "[ Yield");
-  SetExpressionPosition(expr);
-
-  // Evaluate yielded value first; the initial iterator definition depends on
-  // this.  It stays on the stack while we update the iterator.
-  VisitForStackValue(expr->expression());
-
-  Label suspend, continuation, post_runtime, resume, exception;
-
-  __ b(&suspend);
-  __ bind(&continuation);
-  // When we arrive here, r3 holds the generator object.
-  __ RecordGeneratorContinuation();
-  __ LoadP(r4, FieldMemOperand(r3, JSGeneratorObject::kResumeModeOffset));
-  __ LoadP(r3, FieldMemOperand(r3, JSGeneratorObject::kInputOrDebugPosOffset));
-  STATIC_ASSERT(JSGeneratorObject::kNext < JSGeneratorObject::kReturn);
-  STATIC_ASSERT(JSGeneratorObject::kThrow > JSGeneratorObject::kReturn);
-  __ CmpSmiLiteral(r4, Smi::FromInt(JSGeneratorObject::kReturn), r0);
-  __ blt(&resume);
-  __ Push(result_register());
-  __ bgt(&exception);
-  EmitCreateIteratorResult(true);
-  EmitUnwindAndReturn();
-
-  __ bind(&exception);
-  __ CallRuntime(expr->rethrow_on_exception() ? Runtime::kReThrow
-                                              : Runtime::kThrow);
-
-  __ bind(&suspend);
-  OperandStackDepthIncrement(1);  // Not popped on this path.
-  VisitForAccumulatorValue(expr->generator_object());
-  DCHECK(continuation.pos() > 0 && Smi::IsValid(continuation.pos()));
-  __ LoadSmiLiteral(r4, Smi::FromInt(continuation.pos()));
-  __ StoreP(r4, FieldMemOperand(r3, JSGeneratorObject::kContinuationOffset),
-            r0);
-  __ StoreP(cp, FieldMemOperand(r3, JSGeneratorObject::kContextOffset), r0);
-  __ mr(r4, cp);
-  __ RecordWriteField(r3, JSGeneratorObject::kContextOffset, r4, r5,
-                      kLRHasBeenSaved, kDontSaveFPRegs);
-  __ addi(r4, fp, Operand(StandardFrameConstants::kExpressionsOffset));
-  __ cmp(sp, r4);
-  __ beq(&post_runtime);
-  __ push(r3);  // generator object
-  __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1);
-  RestoreContext();
-  __ bind(&post_runtime);
-  PopOperand(result_register());
-  EmitReturnSequence();
-
-  __ bind(&resume);
-  context()->Plug(result_register());
+  // Resumable functions are not supported.
+  UNREACHABLE();
 }
 
 void FullCodeGenerator::PushOperands(Register reg1, Register reg2) {