[llvm] [AMDGPU] Provide default value in get intrinsic param type (PR #122448)

[Matt Arsenault via llvm-commits]

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@@ -968,11 +983,11 @@ static Type* getIntrinsicParamType(
   case AMDGPULibFunc::DUMMY:
     return nullptr;
   }
-  if (P.VectorSize > 1)
+  if (T && P.VectorSize > 1)
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arsenm wrote:

null T can't reach here 

https://github.com/llvm/llvm-project/pull/122448