[TableGen] Use std::map::try_emplace to simplify code in GlobalISelEmitter. NFC

topperc · topperc · commit a886870bc8ac · 2023-08-22T10:10:35.000-07:00
diff --git a/llvm/utils/TableGen/GlobalISelEmitter.cpp b/llvm/utils/TableGen/GlobalISelEmitter.cpp
@@ -2520,9 +2520,7 @@ void GlobalISelEmitter::run(raw_ostream &OS) {
 }
 
 void GlobalISelEmitter::declareSubtargetFeature(Record *Predicate) {
-  if (SubtargetFeatures.count(Predicate) == 0)
-    SubtargetFeatures.emplace(
-        Predicate, SubtargetFeatureInfo(Predicate, SubtargetFeatures.size()));
+  SubtargetFeatures.try_emplace(Predicate, Predicate, SubtargetFeatures.size());
 }
 
 } // end anonymous namespace

Original file line number	Diff line number	Diff line change
`@@ -2520,9 +2520,7 @@ void GlobalISelEmitter::run(raw_ostream &OS) {`
`2520`	`2520`	`}`
`2521`	`2521`
`2522`	`2522`	`void GlobalISelEmitter::declareSubtargetFeature(Record *Predicate) {`
`2523`		`- if (SubtargetFeatures.count(Predicate) == 0)`
`2524`		`- SubtargetFeatures.emplace(`
`2525`		`- Predicate, SubtargetFeatureInfo(Predicate, SubtargetFeatures.size()));`
	`2523`	`+ SubtargetFeatures.try_emplace(Predicate, Predicate, SubtargetFeatures.size());`
`2526`	`2524`	`}`
`2527`	`2525`
`2528`	`2526`	`} // end anonymous namespace`