[clang] [llvm] [SystemZ] Global Stackprotector and associated location section (PR #169317)

[Ulrich Weigand via cfe-commits]

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@@ -1801,6 +1806,17 @@ void SystemZDAGToDAGISel::Select(SDNode *Node) {
     SelectCode(St);
     return;
   }
+  case SystemZISD::COMPARE_SG_DAG:
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uweigand wrote:

Why do we need this here?  Can't this be a regular matching pattern for `z_csg` in the .td file?

https://github.com/llvm/llvm-project/pull/169317