[compiler-rt] [llvm] [ASan] Correctly handle vectorized pointer sub/cmp for `invalid-pointer-pair` (PR #213546)

[via llvm-commits]

================
@@ -1698,16 +1698,38 @@ bool AddressSanitizer::GlobalIsLinkerInitialized(GlobalVariable *G) {
   return true;
 }
 
-void AddressSanitizer::instrumentPointerComparisonOrSubtraction(
+bool AddressSanitizer::instrumentPointerComparisonOrSubtraction(
     Instruction *I, RuntimeCallInserter &RTCI) {
   IRBuilder<> IRB(I);
   FunctionCallee F = isa<ICmpInst>(I) ? AsanPtrCmpFunction : AsanPtrSubFunction;
   Value *Param[2] = {I->getOperand(0), I->getOperand(1)};
-  for (Value *&i : Param) {
-    if (i->getType()->isPointerTy())
-      i = IRB.CreatePointerCast(i, IntptrTy);
+
+  if (const auto *Ty = Param[0]->getType(); Ty->isVectorTy()) {
+    const auto *VTy = dyn_cast<FixedVectorType>(Ty);
+    // Skip scalable vectors
----------------
flovent wrote:

Done, i changed it to `// TODO: Add support for scalable vectors if possible.`

https://github.com/llvm/llvm-project/pull/213546