Add VL_CACHE_LINE_BYTES and use 64 as defult.

src/V3EmitC.cpp

@@ -2778,7 +2778,7 @@ void EmitCImp::emitInt(AstNodeModule* modp) {
     }
 
     puts("}");
-    if (!VN_IS(modp, Class)) puts(" VL_ATTR_ALIGNED(128)");
+    if (!VN_IS(modp, Class)) puts(" VL_ATTR_ALIGNED(VL_CACHE_LINE_BYTES)");
     puts(";\n");
 
     emitIntFuncDecls(modp, false);

src/V3EmitCSyms.cpp

@@ -475,7 +475,7 @@ void EmitCSyms::emitSymHdr() {
         puts("void "+protect("__Vdeserialize")+"(VerilatedDeserialize& os);\n");
     }
     puts("\n");
-    puts("} VL_ATTR_ALIGNED(64);\n");
+    puts("} VL_ATTR_ALIGNED(VL_CACHE_LINE_BYTES);\n");
 
     ofp()->putsEndGuard();
 }

src/Verilator.cpp

@@ -466,6 +466,7 @@ static void process() {
         && !v3Global.opt.xmlOnly()
         && !v3Global.opt.dpiHdrOnly()) {
         // Create AstCUse to determine what class forward declarations/#includes needed in C
+        // Must be before V3EmitC
         V3CUse::cUseAll(v3Global.rootp());
 
         // emitcInlines is first, as it may set needHInlines which other emitters read