[pseudo] Handle no-reductions-available on the fastpath. NFC

sam-mccall · sam-mccall · commit 768216cac024 · 2022-06-23T20:34:11.000+02:00
This is a ~2% speedup.
diff --git a/clang-tools-extra/pseudo/lib/GLR.cpp b/clang-tools-extra/pseudo/lib/GLR.cpp
@@ -380,7 +380,7 @@ class GLRReduce {
       RID = A.getReduceRule();
     }
     if (!RID.hasValue())
-      return false;
+      return true; // no reductions available, but we've processed the head!
     const auto &Rule = Params.G.lookupRule(*RID);
     const GSS::Node *Base = Head;
     TempSequence.resize_for_overwrite(Rule.Size);

Original file line number	Diff line number	Diff line change
`@@ -380,7 +380,7 @@ class GLRReduce {`
`380`	`380`	`RID = A.getReduceRule();`
`381`	`381`	`}`
`382`	`382`	`if (!RID.hasValue())`
`383`		`- return false;`
	`383`	`+ return true; // no reductions available, but we've processed the head!`
`384`	`384`	`const auto &Rule = Params.G.lookupRule(*RID);`
`385`	`385`	`const GSS::Node *Base = Head;`
`386`	`386`	`TempSequence.resize_for_overwrite(Rule.Size);`