[llvm-bugs] [Bug 36898] New: [X86] Incorrect throughput for FP divide in Sandybridge/Haswell/Broadwell/Skylake scheduler model

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36898

            Bug ID: 36898
           Summary: [X86] Incorrect throughput for FP divide in
                    Sandybridge/Haswell/Broadwell/Skylake scheduler model
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: craig.topper at gmail.com
                CC: llvm-bugs at lists.llvm.org

For example, this seems wrong

; GENERIC-LABEL: test_divps:
; GENERIC:       # %bb.0:
; GENERIC-NEXT:    vdivps %ymm1, %ymm0, %ymm0 # sched: [29:2.00]
; GENERIC-NEXT:    vdivps (%rdi), %ymm0, %ymm0 # sched: [36:2.00]
; GENERIC-NEXT:    retq # sched: [1:1.00]

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