[IPO] Avoid repeated hash lookups (NFC) (#130462)

kazutakahirata · web-flow · commit 7cd304725263 · 2025-03-09T00:47:57.000-08:00
diff --git a/llvm/lib/Transforms/IPO/FunctionAttrs.cpp b/llvm/lib/Transforms/IPO/FunctionAttrs.cpp
@@ -406,15 +406,16 @@ static FunctionSummary *calculatePrevailingSummary(
     }
   }
 
+  auto &CPS = CachedPrevailingSummary[VI];
   if (Local) {
     assert(!Prevailing);
-    CachedPrevailingSummary[VI] = Local;
+    CPS = Local;
   } else if (Prevailing) {
     assert(!Local);
-    CachedPrevailingSummary[VI] = Prevailing;
+    CPS = Prevailing;
   }
 
-  return CachedPrevailingSummary[VI];
+  return CPS;
 }
 
 bool llvm::thinLTOPropagateFunctionAttrs(

Original file line number	Diff line number	Diff line change
`@@ -406,15 +406,16 @@ static FunctionSummary *calculatePrevailingSummary(`
`406`	`406`	`}`
`407`	`407`	`}`
`408`	`408`
	`409`	`+ auto &CPS = CachedPrevailingSummary[VI];`
`409`	`410`	`if (Local) {`
`410`	`411`	`assert(!Prevailing);`
`411`		`- CachedPrevailingSummary[VI] = Local;`
	`412`	`+ CPS = Local;`
`412`	`413`	`} else if (Prevailing) {`
`413`	`414`	`assert(!Local);`
`414`		`- CachedPrevailingSummary[VI] = Prevailing;`
	`415`	`+ CPS = Prevailing;`
`415`	`416`	`}`
`416`	`417`
`417`		`- return CachedPrevailingSummary[VI];`
	`418`	`+ return CPS;`
`418`	`419`	`}`
`419`	`420`
`420`	`421`	`bool llvm::thinLTOPropagateFunctionAttrs(`