[llvm] [mlir] [mlir][core] Add an MLIR "pattern catalog" generator (PR #146228)

[Mehdi Amini via llvm-commits]

================
@@ -0,0 +1,55 @@
+#include "mlir/IR/PatternMatch.h"
+#include "llvm/Support/Debug.h"
+
+#define DEBUG_TYPE "pattern-logging-listener"
+
+using namespace mlir;
+
+static constexpr StringLiteral catalogPrefix = "PatternLoggingListener: ";
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joker-eph wrote:

A pattern we used in other files is something like this:

```
#define DEBUG_TYPE "liveness-analysis"
#define DBGS() (llvm::dbgs() << '[' << DEBUG_TYPE << "] ")
#define LDBG(X) LLVM_DEBUG(DBGS() << X << "\n")
```

And then adjusting the macro usage.

(I think it'd be best if we standardize it in the codebase by moving these macros in a common header though)

https://github.com/llvm/llvm-project/pull/146228