[all-commits] [llvm/llvm-project] 47a076: [AMDGPU] Add LDS encoding granularity to TargetParser

[Chinmay Deshpande via All-commits]

  Branch: refs/heads/users/chinmaydd/lds-encoding-granule
  Home:   https://github.com/llvm/llvm-project
  Commit: 47a076d2d3a0a93b14229299f4756e8dda633532
      https://github.com/llvm/llvm-project/commit/47a076d2d3a0a93b14229299f4756e8dda633532
  Author: Chinmay Deshpande <chdeshpa at amd.com>
  Date:   2026-09-19 (Sat, 19 Sep 2026)

  Changed paths:
    M llvm/include/llvm/TargetParser/AMDGPUTargetParser.h
    M llvm/lib/Target/AMDGPU/AMDGPU.td
    M llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUFeatures.td
    M llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
    M llvm/lib/Target/AMDGPU/R600Processors.td
    M llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
    M llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h
    M llvm/lib/TargetParser/AMDGPUTargetParser.cpp
    A llvm/test/CodeGen/AMDGPU/lds-size-gfx1030.ll
    A llvm/test/CodeGen/AMDGPU/lds-size-gfx9-4-generic.ll
    M llvm/test/TableGen/AMDGPUTargetDefLDSAllocGranularity.td
    M llvm/unittests/TargetParser/TargetParserTest.cpp

  Log Message:
  -----------
  [AMDGPU] Add LDS encoding granularity to TargetParser

Model LDS encoding granularity with dedicated features and expose the
byte-valued getLDSEncodingGranule query for GPUKind and subarch. Keep
encoding independent of the hardware allocation granularity used for
occupancy; GFX10.3, GFX11 and GFX12.0 encode in 512-byte units while
allocating 1024-byte blocks.

Migrate program resource register and PAL metadata encoding to the new
query and remove getLdsDwGranularity from AMDGPUBaseInfo. gfx9-4-generic
uses gfx950's 1280-byte encoding granule independently of LDS capacity.

Test encoding queries, feature membership, generic-target validation and
encoded LDS sizes, including the GFX10.3 allocation/encoding distinction.

Change-Id: I9d3c2c041605e9a45fa8fbda09fc3460a74953ea



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