[Support] Work around GCC's enum support

MaskRay · MaskRay · commit 10842b44759f · 2022-09-08T00:13:25.000-07:00
diff --git a/llvm/include/llvm/Support/Compression.h b/llvm/include/llvm/Support/Compression.h
@@ -89,6 +89,7 @@ inline Format formatFor(DebugCompressionType Type) {
   case DebugCompressionType::Zstd:
     return Format::Zstd;
   }
+  llvm_unreachable("invalid type");
 }
 
 struct Params {

Original file line number	Diff line number	Diff line change
`@@ -89,6 +89,7 @@ inline Format formatFor(DebugCompressionType Type) {`
`89`	`89`	`case DebugCompressionType::Zstd:`
`90`	`90`	`return Format::Zstd;`
`91`	`91`	`}`
	`92`	`+ llvm_unreachable("invalid type");`
`92`	`93`	`}`
`93`	`94`
`94`	`95`	`struct Params {`