[clang] [llvm] [mlir] [NVPTX] Unify and extend barrier{.cta} intrinsic support (PR #140615)

[Alex MacLean via cfe-commits]

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@@ -1349,6 +1349,10 @@ static bool upgradeIntrinsicFunction1(Function *F, Function *&NewFn,
       else if (Name == "clz.ll" || Name == "popc.ll" || Name == "h2f" ||
                Name == "swap.lo.hi.b64")
         Expand = true;
+      else if (Name == "barrier0" || Name == "barrier.n" ||
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AlexMaclean wrote:

I'm moved these cases as well as the others without a consume_front into a StringSwitch in the else branch. I agree we could go further but looks like we used to have what you described and switched to this style in https://github.com/llvm/llvm-project/commit/b045c36ab92f4ff478dab678aaff4680fbccc7ea so maybe there are arguments for both?

https://github.com/llvm/llvm-project/pull/140615