Minor fixes and refactors

This commit aims to address some potentially problematic places in the
codebase.

Author: smilczek

visa/CFGStructurizer.cpp

@@ -73,7 +73,7 @@ typedef std::map<ANode *, ANode *> ANodeMap;
 // ANode base, abstract class
 class ANode {
 public:
-  uint32_t anodeId;
+  uint32_t anodeId = 0;
   ANodeType type;
   ANList preds;
   ANList succs;
@@ -140,8 +140,8 @@ class ANode {
 
 private:
   // copy-ctor and assignment operator are not allowed
-  ANode(const ANode &);
-  ANode &operator=(const ANode &);
+  ANode(const ANode &) = delete;
+  ANode &operator=(const ANode &) = delete;
 };
 
 // ANodeBB : ANode for a single BB
@@ -160,10 +160,10 @@ class ANodeBB : public ANode {
   //                                      endif (join)
   //                                    label0:
   //
-  bool isJmpiTarget;
+  bool isJmpiTarget = false;
 
   explicit ANodeBB()
-      : ANode(AN_BB), bb(nullptr), type(ANODEBB_NORMAL), isJmpiTarget(false) {}
+      : ANode(AN_BB), bb(nullptr), type(ANODEBB_NORMAL) {}
   explicit ANodeBB(G4_BB *b) : ANode(AN_BB), bb(b), type(ANODEBB_NORMAL) {}
   virtual ~ANodeBB() {}
 

visa/Common_BinaryEncoding.h

@@ -128,7 +128,7 @@ class BinInst {
   uint32_t instNumber;      // Global instruction number
   bool compacted = false;
 
-  uint64_t genOffset;
+  uint64_t genOffset = 0;
 
   BinInst() {
     DWords[0] = 0;

visa/DebugInfo.h

@@ -366,7 +366,7 @@ class KernelDebugInfo {
 };
 
 class SaveRestoreInfo {
-    G4_INST* i = nullptr;
+  G4_INST *i = nullptr;
 
 public:
   // Map src GRF->GRF/Memory

visa/G4_Kernel.hpp

@@ -580,6 +580,9 @@ class G4_Kernel {
             uint32_t funcId, unsigned char major, unsigned char minor);
   ~G4_Kernel();
 
+  G4_Kernel(const G4_Kernel &) = delete;
+  G4_Kernel& operator=(const G4_Kernel &) = delete;
+
   TARGET_PLATFORM getPlatform() const { return platformInfo.platform; }
   PlatformGen getPlatformGeneration() const { return platformInfo.family; }
   const char *getGenxPlatformString() const {

visa/GraphColor.h

@@ -161,7 +161,7 @@ class LiveRange final {
   unsigned numRegNeeded;
   unsigned degree = 0;
   unsigned refCount = 0;
-  unsigned parentLRID;
+  unsigned parentLRID = 0;
   AssignedReg reg;
   float spillCost = 0.0f;
   BankConflict bc = BANK_CONFLICT_NONE;

visa/Passes/StaticProfiling.hpp

@@ -45,7 +45,7 @@ class StaticCycleProfiling {
   G4_Kernel &kernel;
   std::vector<InstCycle> tokenInsts;
   std::vector<DistPipeInsts> distInsts;
-  LatencyTable *LT;
+  LatencyTable *LT = nullptr;
 
   unsigned BBStaticCycleProfiling(G4_BB *bb);
 

visa/iga/IGALibrary/Backend/Messages/MessageDecoder.hpp

@@ -252,7 +252,7 @@ struct MessageDecoder {
   }
 
   void
-  setScatterGatherOp(const std::string& msgSym, const std::string& msgDesc, SendOp op,
+  setScatterGatherOp(const std::string &msgSym, const std::string &msgDesc, SendOp op,
                      AddrType addrType, SendDesc surfaceId, int addrSize,
                      int bitsPerElem, int elemsPerAddr, int simd,
                      MessageInfo::Attr extraAttrs = MessageInfo::Attr::NONE) {

visa/iga/IGALibrary/Backend/Messages/MessageDecoderHDC.cpp

@@ -324,7 +324,7 @@ struct MessageDecoderHDC : MessageDecoderLegacy {
   //
 
   // allows different data sizes in mem and reg
-  void setHdcMessageX(const std::string& msgSym, const std::string& msgDesc, SendOp op,
+  void setHdcMessageX(const std::string &msgSym, const std::string &msgDesc, SendOp op,
                       int addrSizeBits, int bitsPerElemReg, int bitsPerElemMem,
                       int elemsPerAddr, int execSize,
                       MessageInfo::Attr extraAttrs) {
@@ -429,7 +429,7 @@ struct MessageDecoderHDC : MessageDecoderLegacy {
                    elemsPerAddr, execSize, extraAttrs);
   }
 
-  void setHdcOwBlock(const std::string& msgSym, const std::string& msgDesc, SendOp op,
+  void setHdcOwBlock(const std::string &msgSym, const std::string &msgDesc, SendOp op,
                      int addrSize, MessageInfo::Attr extraAttrs) {
     enum MDC_A64_DB_OW {
       OW1L = 0x0,

visa/iga/IGALibrary/IR/BitSet.hpp

@@ -71,6 +71,23 @@ template <typename I = uint32_t> class BitSet {
     return *this;
   }
 
+  BitSet<I> &operator=(BitSet<I> &&rhs) {
+    if (this == &rhs) {
+      return *this;
+    }
+    if (words) {
+      delete[] words;
+    }
+
+    N = rhs.N;
+    wordsSize = rhs.wordsSize;
+    words = rhs.words;
+
+    rhs.words = nullptr;
+
+    return *this;
+  }
+
   ~BitSet() {
     if (words) {
       delete[] words;

visa/iga/IGALibrary/IR/RegDeps.hpp

@@ -271,6 +271,9 @@ class DepSetBuilder {
       delete ds;
   }
 
+  DepSetBuilder(const DepSetBuilder &) = delete;
+  DepSetBuilder &operator=(const DepSetBuilder &) = delete;
+
 public:
   // DepSet creater
   /// createSrcDepSet - create DepSet for src operands of instruction i