[llvm] [LoopIdiomRecognizer] Implement CRC recognition (PR #79295)

[Craig Topper via llvm-commits]

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@@ -135,6 +137,9 @@ static cl::opt<bool> UseLIRCodeSizeHeurs(
              "with -Os/-Oz"),
     cl::init(true), cl::Hidden);
 
+static cl::opt<bool> CRCRecognize("recognize-crc", cl::desc("CRC RECOGNIZE"),
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topperc wrote:

Description should not be in all caps

https://github.com/llvm/llvm-project/pull/79295