[clang] [llvm] [AArch64] Stack probing for dynamic allocas in SelectionDAG (PR #66525)

[Sam Tebbs via cfe-commits]

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@@ -861,6 +861,12 @@ def AArch64stilp : SDNode<"AArch64ISD::STILP", SDT_AArch64stilp, [SDNPHasChain,
 def AArch64stnp : SDNode<"AArch64ISD::STNP", SDT_AArch64stnp, [SDNPHasChain, SDNPMayStore, SDNPMemOperand]>;
 
 def AArch64tbl : SDNode<"AArch64ISD::TBL", SDT_AArch64TBL>;
+
+def AArch64probedalloca
+    : SDNode<"AArch64ISD::PROBED_ALLOCA",
+             SDTypeProfile<0, 1, [SDTCisPtrTy<0>]>,
+             [SDNPHasChain]>;
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SamTebbs33 wrote:

Does this need a `SDNPMayStore` attribute?

https://github.com/llvm/llvm-project/pull/66525