Get rid of -Wunused-function, Wunused-variable warnings

Change-Id: I3dd9622974f673232a0df287a623223ecc45071a

Author: FilipFudala

IGC/AdaptorCommon/AddCopyIntrinsic.cpp

@@ -85,7 +85,9 @@ class AddCopyIntrinsic : public FunctionPass
         Value* V,
         SmallVector<std::pair<Value*, int>, 16>& EltSrcs);
     Value* removeUndefWrite(Value* StoreVal);
+#ifdef HANDLE_ALLOCA
     void handleAlloca(AllocaInst* AI);
+#endif
     void handleShuffleVector(ShuffleVectorInst* SVI);
 
     void convertCopyBuiltin(CallInst* CI);
@@ -127,10 +129,6 @@ bool AddCopyIntrinsic::runOnFunction(Function& F)
     }
 
     m_changed = false;
-    BasicBlock *EntryBB = &(F.getEntryBlock());
-    BasicBlock::iterator II = EntryBB->begin();
-    BasicBlock::iterator IE = EntryBB->end();
-    BasicBlock::iterator nextII = II;
     for (auto BI = F.begin(), BE = F.end(); BI != BE; ++BI)
     {
         BasicBlock* BB = &*BI;
@@ -369,6 +367,7 @@ Value* AddCopyIntrinsic::removeUndefWrite(Value* V)
     return newVec;
 }
 
+#ifdef HANDLE_ALLOCA
 void  AddCopyIntrinsic::handleAlloca(AllocaInst* AI)
 {
     if (!isCandidate(AI))
@@ -402,6 +401,7 @@ void  AddCopyIntrinsic::handleAlloca(AllocaInst* AI)
         m_changed = true;
     }
 }
+#endif
 
 void AddCopyIntrinsic::handleShuffleVector(ShuffleVectorInst* SVI)
 {

IGC/AdaptorCommon/AddImplicitArgs.cpp

@@ -283,7 +283,6 @@ void AddImplicitArgs::updateNewFuncArgs(llvm::Function* pFunc, llvm::Function* p
             std::string str0;
             llvm::raw_string_ostream s(str0);
             currArg->getType()->print(s);
-            StringRef argTypeName = s.str();
 
             BasicBlock &entry = pNewFunc->getEntryBlock();
             newArg = new llvm::BitCastInst(&(*currArg), (*I).getType(), "", &entry.front());
@@ -425,7 +424,6 @@ void AddImplicitArgs::replaceAllUsesWithNewOCLBuiltinFunction(CodeGenContext* ct
                 std::string str0;
                 llvm::raw_string_ostream s(str0);
                 arg->getType()->print(s);
-                StringRef argTypeName = s.str();
 
                 arg = new llvm::BitCastInst(arg, new_arg_iter->getType(), "", cInst);
             }

IGC/AdaptorOCL/SPIRV/SPIRVInternal.h

@@ -93,6 +93,8 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include "common/LLVMWarningsPop.hpp"
 
+#include "../../inc/common/UFO/portable_compiler.h"
+
 #include <utility>
 #include <functional>
 
@@ -102,10 +104,10 @@ namespace spv {
 using namespace llvm;
 
 namespace kOCLTypeQualifierName {
-  const static char *Const      = "const";
-  const static char *Volatile   = "volatile";
-  const static char *Restrict   = "restrict";
-  const static char *Pipe       = "pipe";
+  __unused const static char *Const      = "const";
+  __unused const static char *Volatile   = "volatile";
+  __unused const static char *Restrict   = "restrict";
+  __unused const static char *Pipe       = "pipe";
 }
 
 template<> inline void

IGC/AdaptorOCL/SPIRV/SPIRVReader.cpp

@@ -104,7 +104,7 @@ isOpenCLKernel(SPIRVFunction *BF) {
    return BF->getModule()->isEntryPoint(ExecutionModelKernel, BF->getId());
 }
 
-static void
+__unused static void
 dumpLLVM(Module *M, const std::string &FName) {
   std::error_code EC;
   raw_fd_ostream FS(FName, EC, sys::fs::F_None);
@@ -1956,14 +1956,6 @@ SPIRVToLLVM::postProcessOCL() {
   return true;
 }
 
-static Value* StripAddrspaceCast(Value *pVal)
-{
-    while (Operator::getOpcode(pVal) == Instruction::AddrSpaceCast)
-        pVal = cast<Operator>(pVal)->getOperand(0);
-
-    return pVal;
-}
-
 bool
 SPIRVToLLVM::postProcessFunctionsReturnStruct(Function *F) {
 
@@ -3697,12 +3689,12 @@ SPIRVToLLVM::transKernelMetadata()
         auto &funcInfo = MD.FuncMD[F];
 
         // Generate metadata for initializer
-        if (auto EM = BF->getExecutionMode(ExecutionModeInitializer)) {
+        if (BF->getExecutionMode(ExecutionModeInitializer)) {
             funcInfo.IsInitializer = true;
         }
 
         // Generate metadata for finalizer
-        if (auto EM = BF->getExecutionMode(ExecutionModeFinalizer)) {
+        if (BF->getExecutionMode(ExecutionModeFinalizer)) {
             funcInfo.IsFinalizer = true;
         }
 
@@ -3981,7 +3973,7 @@ SPIRVToLLVM::transCompilerOption() {
   return true;
 }
 
-static void dumpSPIRVBC(const char* fname, const char* data, unsigned int size)
+__unused static void dumpSPIRVBC(const char* fname, const char* data, unsigned int size)
 {
     FILE* fp;
     fp = fopen(fname, "wb");

IGC/Compiler/CISACodeGen/AdvCodeMotion.cpp

@@ -77,7 +77,7 @@ namespace {
         }
 
         bool hoistUniform(BasicBlock* Src, BasicBlock* Dst) const;
-        bool hoistMost(bool InvPred, BasicBlock* IfBB,
+        __unused bool hoistMost(bool InvPred, BasicBlock* IfBB,
             BasicBlock* TBB, BasicBlock* FBB, BasicBlock* JBB) const;
         bool hoistMost2(bool InvPred, BasicBlock* IfBB,
             BasicBlock* TBB, BasicBlock* FBB, BasicBlock* JBB) const;

IGC/Compiler/CISACodeGen/AdvMemOpt.cpp

@@ -289,5 +289,5 @@ bool AdvMemOpt::hoistUniformLoad(ArrayRef<BasicBlock*> Line) const {
                 break;
         }
     }
-    return false;
+    return Changed;
 }

IGC/Compiler/CISACodeGen/CISACodeGen.h

@@ -26,6 +26,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #pragma once
 #include "Compiler/CodeGenPublic.h"
 #include "visaBuilder_interface.h"
+#include "../../inc/common/UFO/portable_compiler.h"
 
 namespace USC
 {
@@ -105,7 +106,7 @@ namespace IGC
 
 #define DECLARE_CISA_OPCODE(opCode, name, visaname) \
     visaname,
-    static ISA_Opcode ConvertOpcode[] =
+    __unused static ISA_Opcode ConvertOpcode[] =
     {
     #include "isaDef.def"
     };

IGC/Compiler/CISACodeGen/CShader.cpp

@@ -1341,7 +1341,7 @@ uint64_t CShader::GetConstantExpr(ConstantExpr* CE) {
     case Instruction::LShr: {
         Constant* C = CE->getOperand(0);
         if (ConstantExpr * CE1 = dyn_cast<ConstantExpr>(C)) {
-            if (IntegerType * ITy = dyn_cast<IntegerType>(CE1->getType())) {
+            if (dyn_cast<IntegerType>(CE1->getType())) {
                 uint64_t ShAmt = GetImmediateVal(CE->getOperand(1));
                 return GetConstantExpr(CE1) >> ShAmt;
             }
@@ -2756,7 +2756,7 @@ bool CShader::CanTreatScalarSourceAsAlias(llvm::InsertElementInst* IEI) {
     if (!isa<llvm::Instruction>(ScalarOp))
         return false;
     // Skip the scalar operand may be treated as alias.
-    if (auto PN = llvm::dyn_cast<llvm::PHINode>(ScalarOp))
+    if (llvm::dyn_cast<llvm::PHINode>(ScalarOp))
         return false;
     if (auto EEI = llvm::dyn_cast<llvm::ExtractElementInst>(ScalarOp)) {
         if (CanTreatAsAlias(EEI))

IGC/Compiler/CISACodeGen/CheckInstrTypes.cpp

@@ -275,7 +275,7 @@ void CheckInstrTypes::visitAllocaInst(AllocaInst& I)
         g_InstrTypes->hasPrimitiveAlloca = true;
     }
 
-    if (auto md = I.getMetadata("igc.read_only_array"))
+    if (I.getMetadata("igc.read_only_array"))
     {
         g_InstrTypes->hasReadOnlyArray = true;
     }

IGC/Compiler/CISACodeGen/CoalescingEngine.cpp

@@ -1187,7 +1187,7 @@ namespace IGC
                 }
                 else
                 {
-                    if (CoalescingEngine::CCTuple * thisCCTuple = GetValueCCTupleMapping(val))
+                    if (GetValueCCTupleMapping(val))
                     {
                         if (!payloadOffsetComputed)
                         {