Add IIT_V10 to support 10-element vectors in intrinsics (#89383)

Needed for a future patch.

Author: jayfoad

llvm/include/llvm/IR/Intrinsics.td

@@ -320,6 +320,7 @@ def IIT_I2 : IIT_Int<2, 57>;
 def IIT_I4 : IIT_Int<4, 58>;
 def IIT_AARCH64_SVCOUNT : IIT_VT<aarch64svcount, 59>;
 def IIT_V6 : IIT_Vec<6, 60>;
+def IIT_V10 : IIT_Vec<10, 61>;
 }
 
 defvar IIT_all_FixedTypes = !filter(iit, IIT_all,

llvm/lib/IR/Function.cpp

@@ -1172,6 +1172,10 @@ static void DecodeIITType(unsigned &NextElt, ArrayRef<unsigned char> Infos,
     OutputTable.push_back(IITDescriptor::getVector(8, IsScalableVector));
     DecodeIITType(NextElt, Infos, Info, OutputTable);
     return;
+  case IIT_V10:
+    OutputTable.push_back(IITDescriptor::getVector(10, IsScalableVector));
+    DecodeIITType(NextElt, Infos, Info, OutputTable);
+    return;
   case IIT_V16:
     OutputTable.push_back(IITDescriptor::getVector(16, IsScalableVector));
     DecodeIITType(NextElt, Infos, Info, OutputTable);