[turbofan] Add bounds check to Node::InputAt(index) and fix tests that go out of bounds.

test/cctest/compiler/test-osr.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/codegen.h"
 #include "src/compiler/all-nodes.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/diamond.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/js-graph.h"
@@ skipping 505 matching lines @@
   OsrDeconstructorTester T(1);
 
   // outermost loop.
   While loop0(T, T.p0, false, 1);
   Node* loop0_cntr = MakeCounter(&T.jsgraph, T.p0, loop0.loop);
   loop0.branch->ReplaceInput(0, loop0_cntr);
 
   // middle loop.
   Node* loop1 = T.graph.NewNode(T.common.Loop(2), loop0.if_true, T.self);
   loop1->ReplaceInput(0, loop0.if_true);
-  Node* loop1_phi =
-      T.graph.NewNode(T.common.Phi(kMachAnyTagged, 2), loop0_cntr, loop0_cntr);
+  Node* loop1_phi = T.graph.NewNode(T.common.Phi(kMachAnyTagged, 2), loop0_cntr,
+                                    loop0_cntr, loop1);
 
   // innermost (OSR) loop.
   While loop2(T, T.p0, true, 1);
   loop2.loop->ReplaceInput(0, loop1);
 
   Node* loop2_cntr = MakeCounter(&T.jsgraph, loop1_phi, loop2.loop);
   loop2_cntr->ReplaceInput(1, T.osr_values[0]);
   Node* osr_phi = loop2_cntr;
   Node* loop2_inc = loop2_cntr->InputAt(2);
   loop2.branch->ReplaceInput(0, loop2_cntr);
@@ skipping 48 matching lines @@
 
   Node* new_loop0_phi = new_ret->InputAt(0);
   CHECK_EQ(IrOpcode::kPhi, new_loop0_phi->opcode());
   CHECK_EQ(new_loop0_loop, NodeProperties::GetControlInput(new_loop0_phi));
   CHECK_EQ(new_loop0_phi, FindSuccessor(new_loop0_loop, IrOpcode::kPhi));
 
   // Check that the return returns the phi from the OSR loop and control
   // depends on the copy of the outer loop0.
   CheckInputs(new_ret, new_loop0_phi, T.graph.start(), new_loop0_exit);
 }