Rename const pool cache rebuild (#7845)

src/V3AstNodeOther.h

@@ -1000,8 +1000,8 @@ public:
     // this matters, the caller must handle the dtype difference as appropriate. If 'mergeDType' is
     // false, the returned VarScope will have _->dtypep()->sameTree(initp->dtypep()) return true.
     AstVarScope* findConst(AstConst* initp, bool mergeDType);
-    // Rebuild hashes after potential removals
-    void reCache();
+    // Rebuild hashes and missing variable scopes after potential removals
+    void rebuildVarScopesAndCache();
 };
 class AstConstraint final : public AstNode {
     // Constraint

src/V3AstNodes.cpp

@@ -1780,7 +1780,7 @@ AstVarScope* AstConstPool::findConst(AstConst* initp, bool mergeDType) {
     return varScopep;
 }
 
-void AstConstPool::reCache() {
+void AstConstPool::rebuildVarScopesAndCache() {
     m_tables.clear();
     m_consts.clear();
     std::unordered_map<const AstVar*, AstVarScope*> varScopeps;

src/V3Dead.cpp

@@ -597,7 +597,7 @@ public:
         // We may have removed some datatypes, cleanup
         nodep->typeTablep()->repairCache();
         VIsCached::clearCacheTree();  // Removing assignments may affect isPure
-        nodep->constPoolp()->reCache();
+        nodep->constPoolp()->rebuildVarScopesAndCache();
     }
     ~DeadVisitor() override {
         V3Stats::addStatSum("Optimizations, deadified FTasks", m_statFTasksDeadified);

test_regress/t/t_opt_constpool_recache.v

@@ -18,7 +18,7 @@ module t;
   assign idx = cyc[3:0];
 
   // V3Case lowers this to a 512-bit constant-pool lookup table before V3Dead
-  // calls AstConstPool::reCache().
+  // calls AstConstPool::rebuildVarScopesAndCache().
   logic [31:0] case_word;
   always_comb
     case (idx)