[CostModel] Fix the invalid cost for scalable vectors intrinsics

[Allen]

Summary

With the commit D97470, the cost of scalable vectors intrinsics may be invalid,
so make it expensive to avoid crash.

[Allen]

commit f85c5079b8d has fix this

llvm/lib/Analysis/CodeMetrics.cpp

if (const CallInst *CI = dyn_cast<CallInst>(&I)) {
         notDuplicatable = true;
       if (CI->isConvergent())
         convergent = true;
     }
 
     if (const InvokeInst *InvI = dyn_cast<InvokeInst>(&I))
       if (InvI->cannotDuplicate())
         notDuplicatable = true;
-
-    NumInsts += TTI.getUserCost(&I, TargetTransformInfo::TCK_CodeSize);
+    InstructionCost NumInstsProxy =
+        TTI.getUserCost(&I, TargetTransformInfo::TCK_CodeSize);
+    // Make it expensive if it is Invalid.
+    NumInsts += NumInstsProxy.isValid() ? *NumInstsProxy.getValue() : 10;
   }
 
   if (isa<ReturnInst>(BB->getTerminator()))
     ++NumRets;
 
   // We never want to inline functions that contain an indirectbr.  This is
   // incorrect because all the blockaddress's (in static global initializers
   // for example) would be referring to the original function, and this indirect

llvm/test/Analysis/CostModel/AArch64/intrinsic-cost-crash.ll

+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -disable-output -S -mtriple=aarch64--linux-gnu -mattr=+sve -O3 < %s 2>&1 | FileCheck %s
+
+define void @nodef_intrinsic()  {
+entry:
+  br label %vector.body
+
+vector.body:
+  %next = call <vscale x 2 x i1> @llvm.nodef.nxv2i1(<vscale x 2 x i1> zeroinitializer)
+  br label %vector.body
+}
+
+declare <vscale x 2 x i1> @llvm.nodef.nxv2i1(<vscale x 2 x i1>)
+