[clang] [llvm] [Clang] Emit DW_TAG_template_alias for template aliases (PR #87623)

[Orlando Cazalet-Hyams via cfe-commits]

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@@ -465,3 +465,15 @@
 // MANGLED_TEMP_NAMES: error: unknown argument '-gsimple-template-names=mangled'; did you mean '-Xclang -gsimple-template-names=mangled'
 // RUN: %clang -### -target x86_64 -c -g %s 2>&1 | FileCheck --check-prefix=FULL_TEMP_NAMES --implicit-check-not=debug-forward-template-params %s
 // FULL_TEMP_NAMES-NOT: -gsimple-template-names
+
+//// Test -g[no-]template-alias (enabled by default with SCE debugger tuning). Requires DWARFv5.
+// RUN: %clang -### -target x86_64 -c -gdwarf-5 -gsce %s 2>&1 | FileCheck %s --check-prefixes=TEMPLATE-ALIAS
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OCHyams wrote:

This gave `clang: error: unknown argument '--target'; did you mean '-target'?`

https://github.com/llvm/llvm-project/pull/87623