[dict-proto] make SwissNameDictionary::IsValidCapacity constexpr

This fixes a build problem in gcc, where the constexpr function
SwissNameDictionary::SizeFor uses the non-constxpr function
SwissNameDictionary::IsValidCapacity in a DCHECK.

Bug: v8:11388
Change-Id: Iaeb2b80bb72da3a9c895aa33977c160533019c35
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2684514Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Frank Emrich <emrich@google.com>
Cr-Commit-Position: refs/heads/master@{#72595}

src/objects/swiss-name-dictionary-inl.h

@@ -31,7 +31,7 @@ int SwissNameDictionary::Capacity() {
 }
 
 // static
-bool SwissNameDictionary::IsValidCapacity(int capacity) {
+constexpr bool SwissNameDictionary::IsValidCapacity(int capacity) {
   return capacity == 0 || (capacity >= kInitialCapacity &&
                            // Must be power of 2.
                            ((capacity & (capacity - 1)) == 0));
@@ -51,7 +51,7 @@ constexpr int SwissNameDictionary::CtrlTableSize(int capacity) {
 
 // static
 constexpr int SwissNameDictionary::SizeFor(int capacity) {
-  DCHECK(IsValidCapacity(capacity));
+  CONSTEXPR_DCHECK(IsValidCapacity(capacity));
   return PropertyDetailsTableStartOffset(capacity) + capacity;
 }
 

src/objects/swiss-name-dictionary.h

@@ -70,7 +70,7 @@ class SwissNameDictionary : public HeapObject {
  public:
   inline int Capacity();
 
-  inline static bool IsValidCapacity(int capacity);
+  inline static constexpr bool IsValidCapacity(int capacity);
 
   // Returns total size in bytes required for a table of given capacity.
   inline static constexpr int SizeFor(int capacity);