[llvm-bugs] [Bug 51562] New: Disable LDS pass on 13

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=51562

            Bug ID: 51562
           Summary: Disable LDS pass on 13
           Product: OpenMP
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Clang Compiler Support
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jonathanchesterfield at gmail.com
                CC: llvm-bugs at lists.llvm.org

Spun out from 51528.

https://reviews.llvm.org/D104962
50ad3478bdd3f0643ee94f6663293af5b3c27afe

This patch disables an amdgpu LDS memory pass that broke codegen for openmp. It
missed the llvm-13 branch narrowly. Revert in place had a lot of conflicts so
the patch toggles the command line flag and fixes up tests.

The conflict for applying directly to llvm-13 is llc-pipeline.ll where the
change should be to drop this pass from the list.

I can fix up the commit such that it applies cleanly to 13 (probably by making
a new, equivalent one). If I do so, where should I put it so that it can be
cherry-picked? I think the github repo will block me from creating a branch
with it on.

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