[llvm] [SelectionDAG] Fix null pointer dereference in resolveDanglingDebugInfo (PR #173947)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,42 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
+
+; Regression test for a null pointer dereference in
+; SelectionDAG::resolveDanglingDebugInfo when Val.getNode() returns null
+; for aggregate types with nested empty structs.
+;
+; FIXME: This test appears to reveal deeper bugs in DWARF generation logic
+; under certain host/target combinations. For now, we restrict it to Linux
+; hosts only until those underlying issues are fixed.
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arsenm wrote:

Comment is out of date? 

https://github.com/llvm/llvm-project/pull/173947