[llvm] [llvm][loop-rotate] Allow forcing loop-rotation (PR #82828)

[Paul Kirth via llvm-commits]

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@@ -630,8 +639,9 @@ PassBuilder::buildFunctionSimplificationPipeline(OptimizationLevel Level,
                         /*AllowSpeculation=*/false));
 
   // Disable header duplication in loop rotation at -Oz.
-  LPM1.addPass(
-      LoopRotatePass(Level != OptimizationLevel::Oz, isLTOPreLink(Phase)));
+  LPM1.addPass(LoopRotatePass(EnableLoopHeaderDuplication ||
+                                  (Level != OptimizationLevel::Oz),
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ilovepi wrote:

done.

https://github.com/llvm/llvm-project/pull/82828