[TableGen][SubtargetEmitter] Early exit from loop in FindWriteResources

michaelmaitland · michaelmaitland · commit d947224f33e3 · 2024-05-14T18:54:50.000-07:00
This gives us a 26% speed improvement in our downstream.
diff --git a/llvm/utils/TableGen/SubtargetEmitter.cpp b/llvm/utils/TableGen/SubtargetEmitter.cpp
@@ -910,6 +910,7 @@ SubtargetEmitter::FindWriteResources(const CodeGenSchedRW &SchedWrite,
                                           ProcModel.ModelName);
       }
       ResDef = WR;
+      break;
     }
   }
   // TODO: If ProcModel has a base model (previous generation processor),

Original file line number	Diff line number	Diff line change
`@@ -910,6 +910,7 @@ SubtargetEmitter::FindWriteResources(const CodeGenSchedRW &SchedWrite,`
`910`	`910`	`ProcModel.ModelName);`
`911`	`911`	`}`
`912`	`912`	`ResDef = WR;`
	`913`	`+ break;`
`913`	`914`	`}`
`914`	`915`	`}`
`915`	`916`	`// TODO: If ProcModel has a base model (previous generation processor),`