[CodeGen] Fix -Wcovered-switch-default in Combiner.cpp (NFC)

DamonFool · DamonFool · commit a4525fcc8f12 · 2024-08-15T21:17:12.000+08:00
/llvm-project/llvm/lib/CodeGen/GlobalISel/Combiner.cpp:220:3:
error: default label in switch which covers all enumeration values [-Werror,-Wcovered-switch-default]
  default:
  ^
1 error generated.
diff --git a/llvm/lib/CodeGen/GlobalISel/Combiner.cpp b/llvm/lib/CodeGen/GlobalISel/Combiner.cpp
@@ -217,9 +217,8 @@ Combiner::WorkListMaintainer::create(Level Lvl, WorkListTy &WorkList,
   case Level::SinglePass:
     return std::make_unique<WorkListMaintainerImpl<Level::SinglePass>>(WorkList,
                                                                        MRI);
-  default:
-    llvm_unreachable("Illegal ObserverLevel");
   }
+  llvm_unreachable("Illegal ObserverLevel");
 }
 
 Combiner::Combiner(MachineFunction &MF, CombinerInfo &CInfo,

Original file line number	Diff line number	Diff line change
`@@ -217,9 +217,8 @@ Combiner::WorkListMaintainer::create(Level Lvl, WorkListTy &WorkList,`
`217`	`217`	`case Level::SinglePass:`
`218`	`218`	`return std::make_unique<WorkListMaintainerImpl<Level::SinglePass>>(WorkList,`
`219`	`219`	`MRI);`
`220`		`- default:`
`221`		`- llvm_unreachable("Illegal ObserverLevel");`
`222`	`220`	`}`
	`221`	`+ llvm_unreachable("Illegal ObserverLevel");`
`223`	`222`	`}`
`224`	`223`
`225`	`224`	`Combiner::Combiner(MachineFunction &MF, CombinerInfo &CInfo,`