[clang][Interp][NFC] Print global variable initialization state

Author: tbaederr

clang/lib/AST/Interp/Disasm.cpp

@@ -101,6 +101,14 @@ LLVM_DUMP_METHOD void Program::dump(llvm::raw_ostream &OS) const {
   for (const Global *G : Globals) {
     const Descriptor *Desc = G->block()->getDescriptor();
     OS << GI << ": " << (void *)G->block() << " ";
+    {
+      Pointer GP = getPtrGlobal(GI);
+      ColorScope SC(OS, true,
+                    GP.isInitialized()
+                        ? TerminalColor{llvm::raw_ostream::GREEN, false}
+                        : TerminalColor{llvm::raw_ostream::RED, false});
+      OS << (GP.isInitialized() ? "initialized " : "uninitialized ");
+    }
     Desc->dump(OS);
     OS << "\n";
     ++GI;

clang/lib/AST/Interp/Program.cpp

@@ -102,7 +102,7 @@ unsigned Program::createGlobalString(const StringLiteral *S) {
   return I;
 }
 
-Pointer Program::getPtrGlobal(unsigned Idx) {
+Pointer Program::getPtrGlobal(unsigned Idx) const {
   assert(Idx < Globals.size());
   return Pointer(Globals[Idx]->block());
 }

clang/lib/AST/Interp/Program.h

@@ -67,7 +67,7 @@ class Program final {
   unsigned createGlobalString(const StringLiteral *S);
 
   /// Returns a pointer to a global.
-  Pointer getPtrGlobal(unsigned Idx);
+  Pointer getPtrGlobal(unsigned Idx) const;
 
   /// Returns the value of a global.
   Block *getGlobal(unsigned Idx) {