codegen: replace deprecated llvm::VectorType::getNumElements with new…

… APIs (JuliaLang#41144)

src/llvm-late-gc-lowering.cpp

@@ -396,8 +396,14 @@ CountTrackedPointers::CountTrackedPointers(Type *T) {
  }
  if (isa<ArrayType>(T))
  count *= cast<ArrayType>(T)->getNumElements();
- else if (isa<VectorType>(T))
+ else if (isa<VectorType>(T)) {
+#if JL_LLVM_VERSION >= 120000
+ ElementCount EC = cast<VectorType>(T)->getElementCount();
+ count *= EC.getKnownMinValue();
+#else
  count *= cast<VectorType>(T)->getNumElements();
+#endif
+ }
  }
  if (count == 0)
  all = false;
@@ -408,8 +414,14 @@ unsigned getCompositeNumElements(Type *T) {
  return ST->getNumElements();
  else if (auto *AT = dyn_cast<ArrayType>(T))
  return AT->getNumElements();
- else
+ else {
+#if JL_LLVM_VERSION >= 120000
+ ElementCount EC = cast<VectorType>(T)->getElementCount();
+ return EC.getKnownMinValue();
+#else
  return cast<VectorType>(T)->getNumElements();
+#endif
+ }
 }
 
 // Walk through a Type, and record the element path to every tracked value inside
@@ -625,8 +637,14 @@ void LateLowerGCFrame::LiftSelect(State &S, SelectInst *SI) {
  }
  std::vector<int> Numbers;
  unsigned NumRoots = 1;
- if (auto VTy = dyn_cast<VectorType>(SI->getType()))
+ if (auto VTy = dyn_cast<VectorType>(SI->getType())) {
+#if JL_LLVM_VERSION >= 120000
+ ElementCount EC = VTy->getElementCount();
+ Numbers.resize(EC.getKnownMinValue(), -1);
+#else
  Numbers.resize(VTy->getNumElements(), -1);
+#endif
+ }
  else
  assert(isa<PointerType>(SI->getType()) && "unimplemented");
  assert(!isTrackedValue(SI));
@@ -686,7 +704,12 @@ void LateLowerGCFrame::LiftSelect(State &S, SelectInst *SI) {
  assert(NumRoots == 1);
  int Number = Numbers[0];
  Numbers.resize(0);
+#if JL_LLVM_VERSION >= 120000
+ ElementCount EC = VTy->getElementCount();
+ Numbers.resize(EC.getKnownMinValue(), Number);
+#else
  Numbers.resize(VTy->getNumElements(), Number);
+#endif
  }
  }
  if (!isa<PointerType>(SI->getType()))