[llvm] [NFC] [AMDGPU] Added 2 options to rewrite-agpr-copy-mfma for debugging. (PR #189437)

[Shilei Tian via llvm-commits]

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@@ -59,6 +70,7 @@ class AMDGPURewriteAGPRCopyMFMAImpl {
   LiveIntervals &LIS;
   LiveStacks &LSS;
   const RegisterClassInfo &RegClassInfo;
+  mutable unsigned NumRewritesPerformed = 0;
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shiltian wrote:

> Since it won't work in release builds, I had to introduce a new one.

I don't think this is a good argument. I believe the debug counter works if the release build is with assertion enabled.

https://github.com/llvm/llvm-project/pull/189437