X87: [turbofan] Remove the FloatXXSubPreserveNan operators.

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 ec91b5a25a6609e681406343e90a4ee5beaad62f..5318c899c8884cda1e8c9934bcb078593c759679 100644
--- a/src/compiler/x87/instruction-selector-x87.cc
+++ b/src/compiler/x87/instruction-selector-x87.cc
@@ -917,13 +917,6 @@ void InstructionSelector::VisitFloat32Sub(Node* node) {
   Emit(kX87Float32Sub, g.DefineAsFixed(node, stX_0), 0, nullptr);
 }
 
-void InstructionSelector::VisitFloat32SubPreserveNan(Node* node) {
-  X87OperandGenerator g(this);
-  Emit(kX87PushFloat32, g.NoOutput(), g.Use(node->InputAt(0)));
-  Emit(kX87PushFloat32, g.NoOutput(), g.Use(node->InputAt(1)));
-  Emit(kX87Float32Sub, g.DefineAsFixed(node, stX_0), 0, nullptr);
-}
-
 void InstructionSelector::VisitFloat64Sub(Node* node) {
   X87OperandGenerator g(this);
   Emit(kX87PushFloat64, g.NoOutput(), g.Use(node->InputAt(0)));
@@ -931,14 +924,6 @@ void InstructionSelector::VisitFloat64Sub(Node* node) {
   Emit(kX87Float64Sub, g.DefineAsFixed(node, stX_0), 0, nullptr);
 }
 
-void InstructionSelector::VisitFloat64SubPreserveNan(Node* node) {
-  X87OperandGenerator g(this);
-  Emit(kX87PushFloat64, g.NoOutput(), g.Use(node->InputAt(0)));
-  Emit(kX87PushFloat64, g.NoOutput(), g.Use(node->InputAt(1)));
-  Emit(kX87Float64Sub, g.DefineAsFixed(node, stX_0), 0, nullptr);
-}
-
-
 void InstructionSelector::VisitFloat32Mul(Node* node) {
   X87OperandGenerator g(this);
   Emit(kX87PushFloat32, g.NoOutput(), g.Use(node->InputAt(0)));