Revert of [x86] Use better left operand heuristic for Float64Add and Float64Mul.

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index f10ad06cb07708dfdb2f33b672e340fff80c569b..c1328b3ee30683f9c1324e5eec8abe3d59c3d646 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -832,15 +832,12 @@
 
 void InstructionSelector::VisitFloat64Add(Node* node) {
   X64OperandGenerator g(this);
-  Node* left = node->InputAt(0);
-  Node* right = node->InputAt(1);
-  if (g.CanBeBetterLeftOperand(right)) std::swap(left, right);
   if (IsSupported(AVX)) {
-    Emit(kAVXFloat64Add, g.DefineAsRegister(node), g.UseRegister(left),
-         g.Use(right));
+    Emit(kAVXFloat64Add, g.DefineAsRegister(node),
+         g.UseRegister(node->InputAt(0)), g.Use(node->InputAt(1)));
   } else {
-    Emit(kSSEFloat64Add, g.DefineSameAsFirst(node), g.UseRegister(left),
-         g.Use(right));
+    Emit(kSSEFloat64Add, g.DefineSameAsFirst(node),
+         g.UseRegister(node->InputAt(0)), g.Use(node->InputAt(1)));
   }
 }
 
@@ -859,15 +856,12 @@
 
 void InstructionSelector::VisitFloat64Mul(Node* node) {
   X64OperandGenerator g(this);
-  Node* left = node->InputAt(0);
-  Node* right = node->InputAt(1);
-  if (g.CanBeBetterLeftOperand(right)) std::swap(left, right);
   if (IsSupported(AVX)) {
-    Emit(kAVXFloat64Mul, g.DefineAsRegister(node), g.UseRegister(left),
-         g.Use(right));
+    Emit(kAVXFloat64Mul, g.DefineAsRegister(node),
+         g.UseRegister(node->InputAt(0)), g.Use(node->InputAt(1)));
   } else {
-    Emit(kSSEFloat64Mul, g.DefineSameAsFirst(node), g.UseRegister(left),
-         g.Use(right));
+    Emit(kSSEFloat64Mul, g.DefineSameAsFirst(node),
+         g.UseRegister(node->InputAt(0)), g.Use(node->InputAt(1)));
   }
 }