[PATCH] D63605: AMDGPU: Always use s33 for global scratch wave offset

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: rampitec.
Herald added subscribers: arphaman, t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, jvesely, kzhuravl, qcolombet.

Every called function could possibly need this to calculate the
absolute address of stack objectst, and this avoids inserting a copy
around every call site in the kernel. It's also somewhat cleaner to
keep this in a callee saved SGPR.


https://reviews.llvm.org/D63605

Files:
  lib/Target/AMDGPU/SIISelLowering.cpp
  lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
  test/CodeGen/AMDGPU/bswap.ll
  test/CodeGen/AMDGPU/build-vector-packed-partial-undef.ll
  test/CodeGen/AMDGPU/call-argument-types.ll
  test/CodeGen/AMDGPU/call-graph-register-usage.ll
  test/CodeGen/AMDGPU/call-preserved-registers.ll
  test/CodeGen/AMDGPU/call-waitcnt.ll
  test/CodeGen/AMDGPU/callee-frame-setup.ll
  test/CodeGen/AMDGPU/callee-special-input-sgprs.ll
  test/CodeGen/AMDGPU/callee-special-input-vgprs.ll
  test/CodeGen/AMDGPU/chain-hi-to-lo.ll
  test/CodeGen/AMDGPU/cross-block-use-is-not-abi-copy.ll
  test/CodeGen/AMDGPU/frame-index-elimination.ll
  test/CodeGen/AMDGPU/function-returns.ll
  test/CodeGen/AMDGPU/known-never-snan.ll
  test/CodeGen/AMDGPU/llvm.amdgcn.implicitarg.ptr.ll
  test/CodeGen/AMDGPU/load-hi16.ll
  test/CodeGen/AMDGPU/load-lo16.ll
  test/CodeGen/AMDGPU/mubuf-legalize-operands.ll
  test/CodeGen/AMDGPU/mul_uint24-amdgcn.ll
  test/CodeGen/AMDGPU/nested-calls.ll
  test/CodeGen/AMDGPU/pei-reg-scavenger-position.mir
  test/CodeGen/AMDGPU/shl_add_ptr.ll
  test/CodeGen/AMDGPU/sibling-call.ll
  test/CodeGen/AMDGPU/spill-offset-calculation.ll
  test/CodeGen/AMDGPU/stack-realign.ll
  test/CodeGen/AMDGPU/store-hi16.ll

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