[llvm-bugs] [Bug 28426] umulll_overflow with constant powers of two are not well optimized

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=28426

Simon Pilgrim <llvm-dev at redking.me.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
                 CC|                            |listmail at philipreames.com,
                   |                            |llvm-dev at redking.me.uk
          Component|Backend: X86                |Scalar Optimizations
 Fixed By Commit(s)|                            |2cd23eb2438238b1297ff7b4368
                   |                            |d673c449ff24f

--- Comment #3 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
https://godbolt.org/z/GoMjxzW9f

This was fixed in D104665/rG2cd23eb24382

define i1 @k(i64 %0) {
  %2 = icmp ugt i64 %0, 4611686018427387903
  ret i1 %2
}

k(unsigned long long):                                  # @k(unsigned long
long)
        shr     rdi, 62
        setne   al
        ret

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