[llvm] [WebAssembly] Fix operand order in performBitcastCombine (PR #190361)

[Zile Xiong via llvm-commits]

xiongzile wrote:

Hi, @ParkHanbum @badumbatish 
I'm currently working on adding a new test case for this fix.
After adding the test, I noticed that some existing tests are failing in CI.
Should I also update/fix those existing test cases as part of this patch?
Thanks!

https://github.com/llvm/llvm-project/pull/190361