[llvm] [SimplifyCFG] Check whether the previous condition is true before making assume (PR #105986)

[Yingwei Zheng via llvm-commits]

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@@ -7852,6 +7852,15 @@ static bool removeUndefIntroducingPredecessor(BasicBlock *BB,
         Instruction *T = Predecessor->getTerminator();
         IRBuilder<> Builder(T);
         if (BranchInst *BI = dyn_cast<BranchInst>(T)) {
+          // Prevent multiple conditions cases
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dtcxzyw wrote:

Tests?

https://github.com/llvm/llvm-project/pull/105986