[clang] Fix null pointer exception in CorrelatedValuePropagation.cpp

gmh5225 · gmh5225 · commit 52f5d247cb05 · 2024-02-17T23:43:48.000+08:00
diff --git a/llvm/lib/Transforms/Scalar/CorrelatedValuePropagation.cpp b/llvm/lib/Transforms/Scalar/CorrelatedValuePropagation.cpp
@@ -1189,6 +1189,8 @@ static bool runImpl(Function &F, LazyValueInfo *LVI, DominatorTree *DT,
     }
 
     Instruction *Term = BB->getTerminator();
+    if (!Term) 
+        continue;
     switch (Term->getOpcode()) {
     case Instruction::Switch:
       BBChanged |= processSwitch(cast<SwitchInst>(Term), LVI, DT);

Original file line number	Diff line number	Diff line change
`@@ -1189,6 +1189,8 @@ static bool runImpl(Function &F, LazyValueInfo LVI, DominatorTree DT,`
`1189`	`1189`	`}`
`1190`	`1190`
`1191`	`1191`	`Instruction *Term = BB->getTerminator();`
	`1192`	`+ if (!Term)`
	`1193`	`+ continue;`
`1192`	`1194`	`switch (Term->getOpcode()) {`
`1193`	`1195`	`case Instruction::Switch:`
`1194`	`1196`	`BBChanged \|= processSwitch(cast<SwitchInst>(Term), LVI, DT);`