[llvm-bugs] [Bug 49968] New: Large increase in RISC-V tblgen build times

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49968

            Bug ID: 49968
           Summary: Large increase in RISC-V tblgen build times
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: RISC-V
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: asb at lowrisc.org, craig.topper at gmail.com,
                    llvm-bugs at lists.llvm.org
            Blocks: 28222

The RISC-V tblgen builds have been getting slower and slower, and now appears
to be the slowest of the big three (AMDGPU, X86 and RISC-V), especially if I
end up having to use debug builds.....

I realise slower builds is almost inevitable as RISC-V develops and adds
features, but it'd be great if there was some low hanging cleanup that could be
done to get this under control - whether its improvements to tblgen itself or
the RISC-V td files get more efficient.


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=28222
[Bug 28222] llvm-tblgen is still too slow in the default debug build
configuration
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