Update after Instruction iterator-insertion deprecation (#2724)

Avoid deprecation warnings after LLVM commit 2f50b28
("[DebugInfo] Enable deprecation of iterator-insertion methods
(#102608)", 2024-09-20).

Original commit:
KhronosGroup/SPIRV-LLVM-Translator@374eb9d8a4ee0ec

llvm-spirv/lib/SPIRV/OCLToSPIRV.cpp

@@ -444,20 +444,23 @@ void OCLToSPIRVBase::visitCallNDRange(CallInst *CI, StringRef DemangledName) {
   //   local work size
   // The arguments need to add missing members.
   for (size_t I = 1, E = CI->arg_size(); I != E; ++I)
-    Mutator.mapArg(I, [=](Value *V) { return getScalarOrArray(V, Len, CI); });
+    Mutator.mapArg(I, [=](Value *V) {
+      return getScalarOrArray(V, Len, CI->getIterator());
+    });
   switch (CI->arg_size()) {
   case 2: {
     // Has global work size.
     auto *T = Mutator.getArg(1)->getType();
-    auto *C = getScalarOrArrayConstantInt(CI, T, Len, 0);
+    auto *C = getScalarOrArrayConstantInt(CI->getIterator(), T, Len, 0);
     Mutator.appendArg(C);
     Mutator.appendArg(C);
     break;
   }
   case 3: {
     // Has global and local work size.
     auto *T = Mutator.getArg(1)->getType();
-    Mutator.appendArg(getScalarOrArrayConstantInt(CI, T, Len, 0));
+    Mutator.appendArg(
+        getScalarOrArrayConstantInt(CI->getIterator(), T, Len, 0));
     break;
   }
   case 4: {
@@ -1158,7 +1161,7 @@ void OCLToSPIRVBase::visitCallToAddr(CallInst *CI, StringRef DemangledName) {
         .mapArg(Mutator.arg_size() - 1,
                 [&](Value *V) {
                   return std::make_pair(
-                      castToInt8Ptr(V, CI),
+                      castToInt8Ptr(V, CI->getIterator()),
                       TypedPointerType::get(Type::getInt8Ty(V->getContext()),
                                             SPIRAS_Generic));
                 })

llvm-spirv/lib/SPIRV/SPIRVInternal.h

@@ -800,13 +800,14 @@ Constant *getScalarOrVectorConstantInt(Type *T, uint64_t V,
 //  an integer pointer type.
 /// \param Len is the length of the array.
 /// \param V is the value to fill the array.
-Value *getScalarOrArrayConstantInt(Instruction *P, Type *T, unsigned Len,
-                                   uint64_t V, bool IsSigned = false);
+Value *getScalarOrArrayConstantInt(BasicBlock::iterator P, Type *T,
+                                   unsigned Len, uint64_t V,
+                                   bool IsSigned = false);
 
 /// Get the array from GEP.
 /// \param V is a GEP whose pointer operand is a pointer to an array of size
 /// \param Size.
-Value *getScalarOrArray(Value *V, unsigned Size, Instruction *Pos);
+Value *getScalarOrArray(Value *V, unsigned Size, BasicBlock::iterator Pos);
 
 void dumpUsers(Value *V, StringRef Prompt = "");
 
@@ -919,7 +920,7 @@ std::string getSPIRVFriendlyIRFunctionName(const std::string &UniqName,
 PointerType *getInt8PtrTy(PointerType *T);
 
 /// Cast a value to a i8* by inserting a cast instruction.
-Value *castToInt8Ptr(Value *V, Instruction *Pos);
+Value *castToInt8Ptr(Value *V, BasicBlock::iterator Pos);
 
 template <> inline void SPIRVMap<std::string, Op, SPIRVOpaqueType>::init() {
 #define _SPIRV_OP(x) add(#x, OpType##x);

llvm-spirv/lib/SPIRV/SPIRVUtil.cpp

@@ -1013,8 +1013,12 @@ CallInst *addCallInst(Module *M, StringRef FuncName, Type *RetTy,
 
   auto *F = getOrCreateFunction(M, RetTy, getTypes(Args), FuncName, Mangle,
                                Attrs, TakeFuncName);
+  InsertPosition InsertPos(nullptr);
+  if (Pos)
+    InsertPos = Pos->getIterator();
   // Cannot assign a Name to void typed values
-  auto *CI = CallInst::Create(F, Args, RetTy->isVoidTy() ? "" : InstName, Pos);
+  auto *CI =
+      CallInst::Create(F, Args, RetTy->isVoidTy() ? "" : InstName, InsertPos);
   CI->setCallingConv(F->getCallingConv());
   CI->setAttributes(F->getAttributes());
   return CI;
@@ -1063,7 +1067,7 @@ PointerType *getInt8PtrTy(PointerType *T) {
   return PointerType::get(T->getContext(), T->getAddressSpace());
 }
 
-Value *castToInt8Ptr(Value *V, Instruction *Pos) {
+Value *castToInt8Ptr(Value *V, BasicBlock::iterator Pos) {
   return CastInst::CreatePointerCast(
       V, getInt8PtrTy(cast<PointerType>(V->getType())), "", Pos);
 }
@@ -1455,7 +1459,7 @@ static SPIR::RefParamType transTypeDesc(Type *Ty,
   return SPIR::RefParamType(new SPIR::PrimitiveType(SPIR::PRIMITIVE_INT));
 }
 
-Value *getScalarOrArray(Value *V, unsigned Size, Instruction *Pos) {
+Value *getScalarOrArray(Value *V, unsigned Size, BasicBlock::iterator Pos) {
   if (!V->getType()->isPointerTy())
     return V;
   Type *SourceTy;
@@ -1494,8 +1498,8 @@ Constant *getScalarOrVectorConstantInt(Type *T, uint64_t V, bool IsSigned) {
   return nullptr;
 }
 
-Value *getScalarOrArrayConstantInt(Instruction *Pos, Type *T, unsigned Len,
-                                   uint64_t V, bool IsSigned) {
+Value *getScalarOrArrayConstantInt(BasicBlock::iterator Pos, Type *T,
+                                   unsigned Len, uint64_t V, bool IsSigned) {
   if (auto *IT = dyn_cast<IntegerType>(T)) {
     assert(Len == 1 && "Invalid length");
     return ConstantInt::get(IT, V, IsSigned);