[llvm-bugs] [Bug 52198] New: [llvm-mca] Improve barriers for strict region marking

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=52198

            Bug ID: 52198
           Summary: [llvm-mca] Improve barriers for strict region marking
           Product: tools
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: llvm-mca
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: andrea.dibiagio at gmail.com, lebedev.ri at gmail.com,
                    llvm-bugs at lists.llvm.org, matthew.davis at sony.com

https://godbolt.org/z/er1Wsb3da

Efficiently calculating the interleaved load/store costs has been greatly
hindered as the llvm-mca region markers aren't great barriers.

https://reviews.llvm.org/D111945

Even if it affects codegen, it'd be very useful if we can get llvm-mca to give
us at least an estimate of costs so we can automate this a little.

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