[clang] [llvm] [Clang] Add `__builtin_stack_address` (PR #148281)

[Matt Arsenault via cfe-commits]

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@@ -121,6 +121,11 @@ enum NodeType {
   /// function calling this intrinsic.
   SPONENTRY,
 
+  /// STACKADDR - Represents the llvm.stackaddr intrinsic. Takes no argument
+  /// and returns the starting address of the stack region that may be used
+  /// by called functions.
+  STACKADDR,
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arsenm wrote:

Names don't match the actual intrinsic 

https://github.com/llvm/llvm-project/pull/148281