[llvm] AMDGPU: share LDS budget logic and add experimental LDS buffering pass (PR #166388)

[Yaxun Liu via llvm-commits]

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+; RUN: opt -mtriple=amdgcn-amd-amdhsa -mcpu=gfx950 -passes=amdgpu-lds-buffering -S %s | FileCheck %s
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yxsamliu wrote:

will do

https://github.com/llvm/llvm-project/pull/166388