[llvm] [TLI] Fix replace-with-veclib crash with invalid arguments (PR #77112)

[Alexandros Lamprineas via llvm-commits]

================
@@ -168,12 +170,36 @@ static bool replaceWithCallToVeclib(const TargetLibraryInfo &TLI,
   if (!OptInfo)
     return false;
 
+  // There is no guarantee that the vectorized instructions followed the VFABI
+  // specification when being created, this is why we need to add extra check to
+  // make sure that the operands of the vector function obtained via VFABI match
+  // the operands of the original vector instruction.
+  if (CI) {
+    for (auto VFParam : OptInfo->Shape.Parameters) {
+      if (VFParam.ParamKind == VFParamKind::GlobalPredicate)
+        continue;
+
+      // tryDemangleForVFABI must return valid ParamPos, otherwise it could be
+      // a bug in the VFABI parser.
+      assert(VFParam.ParamPos < OrigArgTypes.size() &&
+             "ParamPos has invalid range.");
+      Type *OrigTy = OrigArgTypes[VFParam.ParamPos];
----------------
labrinea wrote:

Do we need the SmallVector containing the argument types? Can we not simply do
```CI->getArgOperand(VFParam.ParamPos)->getType()``` here?

https://github.com/llvm/llvm-project/pull/77112