[llvm] [SystemZ] Add a SystemZ specific pre-RA scheduling strategy. (PR #135076)

[Pengcheng Wang via llvm-commits]

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@@ -35,6 +35,11 @@ static cl::opt<bool> EnableMachineCombinerPass(
     cl::desc("Enable the machine combiner pass"),
     cl::init(true), cl::Hidden);
 
+static cl::opt<bool> GenericSched(
+    "generic-sched", cl::Hidden, cl::init(false),
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wangpc-pp wrote:

Would it be too aggressive to make new scheduler default?

https://github.com/llvm/llvm-project/pull/135076