[llvm-bugs] [Bug 52581] New: [X86][SSE] Improve ISD::FP_TO_*INT_SAT vector lowering

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Nov 22 09:10:34 PST 2021


            Bug ID: 52581
           Summary: [X86][SSE] Improve ISD::FP_TO_*INT_SAT vector lowering
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Keywords: beginner
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: craig.topper at gmail.com, llvm-bugs at lists.llvm.org,
                    llvm-dev at redking.me.uk, pengfei.wang at intel.com,
                    spatel+llvm at rotateright.com


We currently scalarize these cases, but we should be able to make use of SSE
behaviour for out-of-range integer results to keep these fully vectorized.

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