[llvm-bugs] [Bug 47516] New: Request to cherry-pick "[AMDGPU] Fix for folding v2.16 literals." onto 11.0 release branch

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47516

            Bug ID: 47516
           Summary: Request to cherry-pick "[AMDGPU] Fix for folding v2.16
                    literals." onto 11.0 release branch
           Product: libraries
           Version: 11.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: AMDGPU
          Assignee: unassignedbugs at nondot.org
          Reporter: jay.foad at gmail.com
                CC: llvm-bugs at lists.llvm.org

Please can you cherry-pick this AMDGPU codegen fix onto the 11.0 release
branch?


commit c259d3a061c8fc0f9520208eb265d4352a0ad447
Author: dfukalov <daniil.fukalov at amd.com>
Date:   Fri Sep 4 22:44:01 2020 +0300

    [AMDGPU] Fix for folding v2.16 literals.

    It was found some packed immediate operands (e.g. `<half 1.0, half 2.0>`)
are
    incorrectly processed so one of two packed values were lost.

    Introduced new function to check immediate 32-bit operand can be folded.
    Converted condition about current op_sel flags value to fall-through.

    Fixes: SWDEV-247595

    Reviewed By: rampitec

    Differential Revision: https://reviews.llvm.org/D87158

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