[x86] add debug option for and-immediate shrinking
  
The commit that added this functionality:
rL322957

may be causing/exposing a miscompile in PR38648:
https://bugs.llvm.org/show_bug.cgi?id=38648

so allow enabling/disabling to make debugging easier.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340540 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed