[all-commits] [llvm/llvm-project] 69f7d8: [AMDGPU] Set number vgprs used in PS shaders based...

[David Stuttard via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 69f7d81d0a47781e5d4820873c20f725f3d0236e
      https://github.com/llvm/llvm-project/commit/69f7d81d0a47781e5d4820873c20f725f3d0236e
  Author: David Stuttard <david.stuttard at amd.com>
  Date:   2021-10-08 (Fri, 08 Oct 2021)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUResourceUsageAnalysis.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUResourceUsageAnalysis.h
    A llvm/test/CodeGen/AMDGPU/ps-shader-arg-count.ll

  Log Message:
  -----------
  [AMDGPU] Set number vgprs used in PS shaders based on input registers actually used

For PS shaders we can use the input SPI_PS_INPUT_ENA and SPI_PS_INPUT_ADDR
registers

Calculate the number of VGPR registers used as input VGPRs based on these
registers rather than the arguments passed in (this conservatively always
allocates the maximum).

Differential Revision: https://reviews.llvm.org/D101633

Change-Id: Idf7c060cbbd5f7e3300102c55ecee3c07f209de6