[turbofan]: Elide extra move when accessing stack or frame register

src/compiler/x87/instruction-selector-x87.cc

Index: src/compiler/x87/instruction-selector-x87.cc
diff --git a/src/compiler/x87/instruction-selector-x87.cc b/src/compiler/x87/instruction-selector-x87.cc
index 8355963669c56c797a5cfa9404c0eeeccf60079d..c1551df6290e250aee0a1d34dd2e10d46249efe4 100644
--- a/src/compiler/x87/instruction-selector-x87.cc
+++ b/src/compiler/x87/instruction-selector-x87.cc
@@ -1066,26 +1066,6 @@ void VisitWordCompare(InstructionSelector* selector, Node* node,
 
 void VisitWordCompare(InstructionSelector* selector, Node* node,
                       FlagsContinuation* cont) {
-  X87OperandGenerator g(selector);
-  Int32BinopMatcher m(node);
-  if (m.left().IsLoad() && m.right().IsLoadStackPointer()) {
-    LoadMatcher<ExternalReferenceMatcher> mleft(m.left().node());
-    ExternalReference js_stack_limit =
-        ExternalReference::address_of_stack_limit(selector->isolate());
-    if (mleft.object().Is(js_stack_limit) && mleft.index().Is(0)) {
-      // Compare(Load(js_stack_limit), LoadStackPointer)
-      if (!node->op()->HasProperty(Operator::kCommutative)) cont->Commute();
-      InstructionCode opcode = cont->Encode(kX87StackCheck);
-      if (cont->IsBranch()) {
-        selector->Emit(opcode, g.NoOutput(), g.Label(cont->true_block()),
-                       g.Label(cont->false_block()));
-      } else {
-        DCHECK(cont->IsSet());
-        selector->Emit(opcode, g.DefineAsRegister(cont->result()));
-      }
-      return;
-    }
-  }
   VisitWordCompare(selector, node, kX87Cmp, cont);
 }