[turbofan] Combine Word32And with Int32Add and negative power of two.

src/compiler/node-matchers.h

Index: src/compiler/node-matchers.h
diff --git a/src/compiler/node-matchers.h b/src/compiler/node-matchers.h
index c748c61e6a9cc0624c074bde0a579378b067abff..33ddf9a10df26d868b1f7915642a0aacc73a1f23 100644
--- a/src/compiler/node-matchers.h
+++ b/src/compiler/node-matchers.h
@@ -80,6 +80,10 @@ struct IntMatcher FINAL : public ValueMatcher<T, kOpcode> {
     return this->HasValue() && this->Value() > 0 &&
            (this->Value() & (this->Value() - 1)) == 0;
   }
+  bool IsNegativePowerOf2() const {
+    return this->HasValue() && this->Value() < 0 &&
+           (-this->Value() & (-this->Value() - 1)) == 0;
+  }
 };
 
 typedef IntMatcher<int32_t, IrOpcode::kInt32Constant> Int32Matcher;