[turbofan] Allow truncating minus zero in add, sub, mul if we have word32 truncation.

src/type-cache.h

Index: src/type-cache.h
diff --git a/src/type-cache.h b/src/type-cache.h
index 2a95df9f8ca672d1338d3ff39ad57ff0fc4e8c7a..92d51f1e32266525cc30853772547389e77cebb0 100644
--- a/src/type-cache.h
+++ b/src/type-cache.h
@@ -57,6 +57,10 @@ class TypeCache final {
   Type* const kAdditiveSafeInteger =
       CreateRange(-4503599627370496.0, 4503599627370496.0);
   Type* const kSafeInteger = CreateRange(-kMaxSafeInteger, kMaxSafeInteger);
+  Type* const kAdditiveSafeIntegerOrMinusZero =
+      Type::Union(kAdditiveSafeInteger, Type::MinusZero(), zone());
+  Type* const kSafeIntegerOrMinusZero =
+      Type::Union(kSafeInteger, Type::MinusZero(), zone());
   Type* const kPositiveSafeInteger = CreateRange(0.0, kMaxSafeInteger);
 
   Type* const kUntaggedUndefined =