[PATCH] D91516: [AMDGPU][WIP] Lower Function Local LDS Variables.

[Mahesha S via Phabricator via llvm-commits]

hsmhsm updated this revision to Diff 318723.
hsmhsm added a comment.

Build all the required data structures which will be later used to lower function local LDS. Below are the data structures being built.

[1] `Kernel Set` - Holds all the kernels in the module
[2] `Function Local LDS Set` - Holds all the function local LDS from all functions
[3] `Function Address Taken Set` - Holds all the functions whose address is taken within the module

[4] `LDS to Function Map` - Maps each function local LDS to a function within which the LDS is defined
[5] `Function to LDS Map` - Reverse of above map, which maps each functon F to a SET of LDS which are defined within F

[6] `Kernel to Callee Map` - Maps each kernel K to a SET of functions which define LDS and there exists call graph path from K to these functions.
[7] `Kernel to LDS` - Maps each kernel K to a set of function local LDS which are supposed to lowered w.r.t K.

Data structures [1], [2], [3] are built by iterating over the globals and functions defined within the module.
Data structures [4] and [5] are built using BOTTOM-UP based on the use list of function local LDS.
Data structures [6] and [7] are built using TOP-DOWN via call graph traversal.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D91516/new/

https://reviews.llvm.org/D91516

Files:
  llvm/lib/Target/AMDGPU/AMDGPU.h
  llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp
  llvm/lib/Target/AMDGPU/AMDGPULowerFunctionLocalLDS.cpp
  llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
  llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.h
  llvm/lib/Target/AMDGPU/CMakeLists.txt

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