[llvm] [DirectX] Legalize lifetime intrinsics for DXIL (PR #148003)

[Finn Plummer via llvm-commits]

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@@ -239,6 +240,13 @@ class DXILPrepareModule : public ModulePass {
       for (size_t Idx = 0, End = F.arg_size(); Idx < End; ++Idx)
         F.removeParamAttrs(Idx, AttrMask);
 
+      // Match FnAttrs of lifetime intrinsics in LLVM 3.7
+      if (F.isIntrinsic())
+        switch (F.getIntrinsicID())
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inbelic wrote:

Does this not cause a build warning for missing cases? If it does, I suspect it will cause some build failures that set warning to error

https://github.com/llvm/llvm-project/pull/148003