[clang] [llvm] Add support for flag output operand "=@cc" for SystemZ. (PR #125970)

[Ulrich Weigand via llvm-commits]

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@@ -1188,6 +1190,14 @@ class TargetInfo : public TransferrableTargetInfo,
       TiedOperand = N;
       // Don't copy Name or constraint string.
     }
+
+    // CC range can be set by target. SystemZ sets it to 4. It is 2 by default.
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uweigand wrote:

Comment is wrong now (2 is no longer default).  Also, it's probably not necessary to specifically call out SystemZ here.

https://github.com/llvm/llvm-project/pull/125970