[llvm] [DAG] Refactor X86 combineVSelectWithAllOnesOrZeros fold into a generic DAG Combine (PR #145298)

[Simon Pilgrim via llvm-commits]

================
@@ -1,6 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
-; RUN: llc -mtriple=mips-elf -mattr=+msa,+fp64,+mips32r2 < %s | FileCheck %s --check-prefixes=CHECK,MIPS
-; RUN: llc -mtriple=mipsel-elf -mattr=+msa,+fp64,+mips32r2 < %s | FileCheck %s --check-prefixes=CHECK,MIPSEL
+; RUN: llc -mtriple=mips-elf -mattr=+msa,+fp64,+mips32r2 < %s | FileCheck %s
----------------
RKSimon wrote:

Please add back:
```
; RUN: llc -mtriple=mipsel-elf -mattr=+msa,+fp64,+mips32r2 < %s | FileCheck %s
```

https://github.com/llvm/llvm-project/pull/145298