[clang] Disable FTZ/DAZ when compiling shared libraries by default. (PR #80475)

[Andy Kaylor via cfe-commits]

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@@ -117,6 +117,11 @@ C23 Feature Support
 Non-comprehensive list of changes in this release
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+* Code compiled with ``-shared`` and ``-ffast-math`` will no longer enable
+  flush-to-zero floating-point mode by default. This decision can be overridden
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andykaylor wrote:

You may want to revise this to clarify that this only refers to the use of -shared and -ffast-math on the command-line used to link the program.

https://github.com/llvm/llvm-project/pull/80475