[PATCH] D20310: Teach LLVM about Power 9 D-Form VSX Instructions

[Thomas Jablin via llvm-commits]

tjablin updated this revision to Diff 60689.
tjablin added a comment.
Herald added a subscriber: qcolombet.

Another update from CY.

Changes:

  Remove VSHRC, use existing VRRC instead, so we simplify register class hierarchy
  Now, VSRC = (VSLRC, VRRC)
  Because VSX can use vs0-vs63 or v0-v31, so we add a custom flag "UseVSXReg" to distinguish it, asm printer and PPCMCCodeEmitter will use that flag to print correct name and get correct encoding
  Because VSRC = (VSLRC, VRRC), so backend is possible to spill/reload a vector register with incompatible vector store/load instruction, i.e. stxvd2x/lxv or stxv/lxvd2x, so we track stack slot to make sure we use correct store/load instruction.
  Fix broken test cases because of this change.
  select-i1-vs-i1.ll
  Now we generate bettter code for all v4f32 test cases
  
  vsx-p8.ll
  vsx.ll
  Now we generate better code when we use '-fast-isel -O0', because we don't need unnecessary register copy.

Testing:

  Passed 3-stage bootstrap testing
  Passed 3-stage llvm/clang check-all
  Passed Spec2006 (binaries built by stage-3 clang/llvm) with:
  (a) -m64 -mcpu=power8 -O3
  (b) -m64 -mcpu=power8 -O1


http://reviews.llvm.org/D20310

Files:
  lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
  lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
  lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
  lib/Target/PowerPC/MCTargetDesc/PPCMCCodeEmitter.cpp
  lib/Target/PowerPC/PPCAsmPrinter.cpp
  lib/Target/PowerPC/PPCCallingConv.td
  lib/Target/PowerPC/PPCISelLowering.cpp
  lib/Target/PowerPC/PPCInstrFormats.td
  lib/Target/PowerPC/PPCInstrInfo.cpp
  lib/Target/PowerPC/PPCInstrInfo.h
  lib/Target/PowerPC/PPCInstrVSX.td
  lib/Target/PowerPC/PPCMachineFunctionInfo.cpp
  lib/Target/PowerPC/PPCMachineFunctionInfo.h
  lib/Target/PowerPC/PPCRegisterInfo.cpp
  lib/Target/PowerPC/PPCRegisterInfo.td
  lib/Target/PowerPC/PPCVSXCopy.cpp
  test/CodeGen/PowerPC/dform-test.ll
  test/CodeGen/PowerPC/p8-scalar_vector_conversions.ll
  test/CodeGen/PowerPC/select-i1-vs-i1.ll
  test/CodeGen/PowerPC/vsx-args.ll
  test/CodeGen/PowerPC/vsx-infl-copy1.ll
  test/CodeGen/PowerPC/vsx-p8.ll
  test/CodeGen/PowerPC/vsx-spill-norwstore.ll
  test/CodeGen/PowerPC/vsx.ll

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