[DAGCombine] Fix for PR35761

I had falsely assumed that constant operands would be operand(1) of
the bin ops that may need their constant operand to be masked.

Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=35761

Differential Revision: https://reviews.llvm.org/D41667


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321991 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed