[turbofan] Fix typing rule for Math.sign.

src/compiler/type-cache.h

Index: src/compiler/type-cache.h
diff --git a/src/compiler/type-cache.h b/src/compiler/type-cache.h
index 78b2692cf9146023f2403d523ff3129a2fe82ee0..58347cfb3d66044a3618bd6d48fc36a0d14056d8 100644
--- a/src/compiler/type-cache.h
+++ b/src/compiler/type-cache.h
@@ -46,7 +46,9 @@ class TypeCache final {
   Type* const kTenOrUndefined =
       Type::Union(kSingletonTen, Type::Undefined(), zone());
   Type* const kMinusOneOrZero = CreateRange(-1.0, 0.0);
-  Type* const kMinusOneToOne = CreateRange(-1.0, 1.0);
+  Type* const kMinusOneToOneOrMinusZeroOrNaN = Type::Union(
+      Type::Union(CreateRange(-1.0, 1.0), Type::MinusZero(), zone()),
+      Type::NaN(), zone());
   Type* const kZeroOrOne = CreateRange(0.0, 1.0);
   Type* const kZeroOrOneOrNaN = Type::Union(kZeroOrOne, Type::NaN(), zone());
   Type* const kZeroToThirtyOne = CreateRange(0.0, 31.0);