[llvm] [DAG] Combine `store + vselect` to `masked_store` (PR #145176)

[Pranav Kant via llvm-commits]

pranavk wrote:

[simple.txt](https://github.com/user-attachments/files/22429441/simple.txt)

Here's the minimal code to repro this.
Compile flags:
`-std=c++20 -c -Wno-constant-logical-operand  --target=aarch64-none-linux-gnu -fno-crash-diagnostics   -march=armv8.2-a+sve -O1`

Crashes with same stack trace as mentioned above.

https://github.com/llvm/llvm-project/pull/145176