[llvm-bugs] [Bug 40123] New: [X86] Missing cost model for saturating add/sub intrinsics

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Dec 20 13:38:05 PST 2018


            Bug ID: 40123
           Summary: [X86] Missing cost model for saturating add/sub
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: nikita.ppv at gmail.com
                CC: craig.topper at gmail.com, llvm-bugs at lists.llvm.org,
                    llvm-dev at redking.me.uk, spatel+llvm at rotateright.com

We currently don't have cost modelling for uadd_sat, sadd_sat, usub_sat and
ssub_sat intrinsics (and they need to be marked as trivially vectorizable). I
think this is the last blocker before we can start canonicalizing in

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