[clang] [Clang] Enable -fextend-lifetimes at -Og (PR #118026)

[Stephen Tozer via cfe-commits]

================
@@ -1834,6 +1834,14 @@ bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
     Opts.setInlining(CodeGenOptions::NormalInlining);
   }
 
+  // If we have specified -Og and have not set any explicit -fextend-lifetimes
+  // value, then default to -fextend-lifetimes=all.
----------------
SLTozer wrote:

Ah, I implemented the `=` option on a local-only branch, and accidentally left this comment in. My mistake, though I may yet decide to merge the feature into the earlier PRs.

https://github.com/llvm/llvm-project/pull/118026