Merge pull request swiftlang#62737 from valeriyvan/PrunedLiveness-null-derefence

swift-ci · web-flow · commit c547f57b0666 · 2023-01-12T03:53:22.000-08:00
Fix NULL pointer dereference
diff --git a/lib/SIL/Utils/PrunedLiveness.cpp b/lib/SIL/Utils/PrunedLiveness.cpp
@@ -174,6 +174,7 @@ llvm::StringRef PrunedLiveBlocks::getStringRef(IsLive isLive) const {
 void PrunedLiveBlocks::print(llvm::raw_ostream &OS) const {
   if (!discoveredBlocks) {
     OS << "No deterministic live block list\n";
+    return;
   }
   SmallVector<IsLive, 8> isLive;
   for (auto *block : *discoveredBlocks) {

Original file line number	Diff line number	Diff line change
`@@ -174,6 +174,7 @@ llvm::StringRef PrunedLiveBlocks::getStringRef(IsLive isLive) const {`
`174`	`174`	`void PrunedLiveBlocks::print(llvm::raw_ostream &OS) const {`
`175`	`175`	`if (!discoveredBlocks) {`
`176`	`176`	`OS << "No deterministic live block list\n";`
	`177`	`+ return;`
`177`	`178`	`}`
`178`	`179`	`SmallVector<IsLive, 8> isLive;`
`179`	`180`	`for (auto block : discoveredBlocks) {`