[llvm-bugs] [Bug 36950] New: Missing canonicalization of select of bitchecks into icmp

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36950

            Bug ID: 36950
           Summary: Missing canonicalization of select of bitchecks into
                    icmp
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: lebedev.ri at gmail.com
                CC: llvm-bugs at lists.llvm.org

Copied from https://bugs.llvm.org/show_bug.cgi?id=17564

There is a missing instcombine to get rid of select
https://rise4fun.com/Alive/gEy

After which the assembly is much better:
https://godbolt.org/g/iAYRup

The only difference after that is in "and edi, 3" vs. "test dil, 3"

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