[llvm] [CodeGen] Derive the regalloc pipeline from the allocator, remove -optimize-regalloc (PR #215740)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/include/llvm/Passes/CodeGenPassBuilder.h llvm/lib/CodeGen/TargetPassConfig.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/include/llvm/Passes/CodeGenPassBuilder.h b/llvm/include/llvm/Passes/CodeGenPassBuilder.h
index d347a663c..174f1aee7 100644
--- a/llvm/include/llvm/Passes/CodeGenPassBuilder.h
+++ b/llvm/include/llvm/Passes/CodeGenPassBuilder.h
@@ -200,8 +200,8 @@ public:
       bool Optimized = Opt.RegAlloc > RegAllocType::Default
                            ? Opt.RegAlloc != RegAllocType::Fast
                            : getOptLevel() != CodeGenOptLevel::None;
-      Opt.OptimizeRegAlloc =
-          Optimized ? cl::boolOrDefault::BOU_TRUE : cl::boolOrDefault::BOU_FALSE;
+      Opt.OptimizeRegAlloc = Optimized ? cl::boolOrDefault::BOU_TRUE
+                                       : cl::boolOrDefault::BOU_FALSE;
     }
   }
 
diff --git a/llvm/lib/CodeGen/TargetPassConfig.cpp b/llvm/lib/CodeGen/TargetPassConfig.cpp
index ab272382d..74934729d 100644
--- a/llvm/lib/CodeGen/TargetPassConfig.cpp
+++ b/llvm/lib/CodeGen/TargetPassConfig.cpp
@@ -81,7 +81,8 @@ static cl::opt<bool> DisableEarlyIfConversion("disable-early-ifcvt", cl::Hidden,
     cl::desc("Disable Early If-conversion"));
 static cl::opt<bool> DisableMachineLICM("disable-machine-licm", cl::Hidden,
     cl::desc("Disable Machine LICM"));
-static cl::opt<bool> DisableMachineCSE("disable-machine-cse", cl::Hidden,
+static cl::opt<bool> DisableMachineCSE(
+    "disable-machine-cse", cl::Hidden,
     cl::desc("Disable Machine Common Subexpression Elimination"));
 static cl::opt<bool> DisablePostRAMachineLICM("disable-postra-machine-licm",
     cl::Hidden,

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https://github.com/llvm/llvm-project/pull/215740