[flang-commits] [clang] [flang] [llvm] [CodeGen] Add a FunctionSplittingMode target option (PR #226575)

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@@ -50,6 +50,19 @@ enum class BasicBlockSection {
   None    // Do not use Basic Block Sections.
 };
 
+/// Late function splitting mode. Decides which functions are eligible to have
+/// their cold blocks moved into a separate section.
+enum class FunctionSplittingMode {
+  None,           // Hard off. Never create a cold section, even for functions
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MattPD wrote:

If this lands before https://github.com/llvm/llvm-project/pull/227880, could we qualify this code comment and the `none` help text? An entry-only basic-block-sections profile still produces a cold section with `-function-splitting=none`.

https://github.com/llvm/llvm-project/pull/226575