Yingwei Zheng f920b746ea [FlattenCFG] Fix the miscompilation where phi nodes exist in the merge point (#81987) ...

When there are phi nodes in the merge point of the if-region, we cannot
do the merge.
Alive2: https://alive2.llvm.org/ce/z/DbgEan
Fixes #70900.

2024-02-25 22:01:13 +08:00

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