[clang] Remove optimization flags from clang codegen tests (PR #113714)

[Eli Friedman via cfe-commits]

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@@ -1,101 +1,230 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
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efriedma-quic wrote:

I think it makes sense to leave this test as-is... it's serving as an end-to-end test that the given C construct is a no-op in assembly.  If the output changes, that's a bug somewhere.  (We do similar things for other intrinsics we expect to lower to a specific sequence.)

https://github.com/llvm/llvm-project/pull/113714