[clang] [llvm] [NVPTX] Change the alloca address space in NVPTXLowerAlloca (PR #154814)

[Artem Belevich via llvm-commits]

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@@ -2253,22 +2253,31 @@ def trapexitinst : NVPTXInst<(outs), (ins), "trap; exit;", [(trap)]>, Requires<[
 // brkpt instruction
 def debugtrapinst : BasicNVPTXInst<(outs), (ins), "brkpt", [(debugtrap)]>;
 
-def SDTDynAllocaOp :
-  SDTypeProfile<1, 2, [SDTCisSameAs<0, 1>, SDTCisInt<1>, SDTCisVT<2, i32>]>;
+def SDTDynAllocaOp
+    : SDTypeProfile<1, 2, [SDTCisSameAs<0, 1>, SDTCisInt<1>, SDTCisVT<2, i32>]>;
 
-def dyn_alloca :
-  SDNode<"NVPTXISD::DYNAMIC_STACKALLOC", SDTDynAllocaOp,
-         [SDNPHasChain, SDNPSideEffect]>;
+def getAllocaAlign : SDNodeXForm<imm, [{
+  if (N->getZExtValue() != 0)
----------------
Artem-B wrote:

Nit: 
```
if (auto NV = N->getZExtValue())
  return CurDAG->getTargetConstant(NV, SDLoc(N), N->getValueType(0));
```

https://github.com/llvm/llvm-project/pull/154814