[llvm-bugs] [Bug 44573] New: [NewPM] InstCombine always run with ExpensiveCombines enabled

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Jan 16 12:55:32 PST 2020


            Bug ID: 44573
           Summary: [NewPM] InstCombine always run with ExpensiveCombines
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: nikita.ppv at gmail.com
                CC: llvm-bugs at lists.llvm.org

NewPM always adds InstCombine in default configuration, which means that
ExpensiveCombines is enabled:

Legacy PM only enabled ExpensiveCombines at O3:

I'm assuming that this discrepancy is not intentional. Originally mentioned on

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