[llvm] [X86] getScalarMaskingNode - FIXUPIMM scalar ops take upper elements from second operand (PR #179101)

[Michael R. Crusoe via llvm-commits]

mr-c wrote:

Thank you @RKSimon ! I can confirm that 6fa617d572d51866732da94a23f7e26242b975b7 fixes all issues I reported and that all tests in https://github.com/simd-everywhere/simde/commit/51d5f4c456dad12359d1895917db3cd331d902a1 now pass.

If 21.x is still open to fixes, a backport there would also be appreciated.

https://github.com/llvm/llvm-project/pull/179101