[turbofan] Allow 0.0 as immediate for floating-point comparison on arm/arm64.

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

Index: src/compiler/arm/instruction-selector-arm.cc
diff --git a/src/compiler/arm/instruction-selector-arm.cc b/src/compiler/arm/instruction-selector-arm.cc
index 943ad0fd198d0e38e006be770f8679743c83da4e..fb25c3b4eb41a55da76860feeb700570dd1d116b 100644
--- a/src/compiler/arm/instruction-selector-arm.cc
+++ b/src/compiler/arm/instruction-selector-arm.cc
@@ -1073,16 +1073,18 @@ void VisitFloat64Compare(InstructionSelector* selector, Node* node,
                          FlagsContinuation* cont) {
   ArmOperandGenerator g(selector);
   Float64BinopMatcher m(node);
+  InstructionOperand* rhs = m.right().Is(0.0) ? g.UseImmediate(m.right().node())
+                                              : g.UseRegister(m.right().node());
   if (cont->IsBranch()) {
     selector->Emit(cont->Encode(kArmVcmpF64), nullptr,
-                   g.UseRegister(m.left().node()),
-                   g.UseRegister(m.right().node()), g.Label(cont->true_block()),
+                   g.UseRegister(m.left().node()), rhs,
+                   g.Label(cont->true_block()),
                    g.Label(cont->false_block()))->MarkAsControl();
   } else {
     DCHECK(cont->IsSet());
-    selector->Emit(
-        cont->Encode(kArmVcmpF64), g.DefineAsRegister(cont->result()),
-        g.UseRegister(m.left().node()), g.UseRegister(m.right().node()));
+    selector->Emit(cont->Encode(kArmVcmpF64),
+                   g.DefineAsRegister(cont->result()),
+                   g.UseRegister(m.left().node()), rhs);
   }
 }