[PATCH] D11471: Scalar to vector conversions using direct moves

[Nemanja Ivanovic]

nemanjai created this revision.
nemanjai added reviewers: wschmidt, hfinkel, kbarton, seurer.
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nemanjai set the repository for this revision to rL LLVM.

We currently always build vectors from scalar non-constant values using stack operations which involves the load-hit-store hazard. This patch is the first in a series that will allow operations such as scalar to vector, extract vector element, etc. to be done using direct move instructions rather than memory operations.
Since this is just the first patch, the code in some cases is not yet optimal, but all scalar to vector operations involve fewer memory operations.

Repository:
  rL LLVM

http://reviews.llvm.org/D11471

Files:
  lib/Target/PowerPC/PPCISelLowering.cpp
  lib/Target/PowerPC/PPCISelLowering.h
  lib/Target/PowerPC/PPCInstrVSX.td
  lib/Target/PowerPC/PPCVSXCopy.cpp
  test/CodeGen/PowerPC/fp-int-conversions-direct-moves.ll
  test/CodeGen/PowerPC/vsx.ll
  test/CodeGen/PowerPC/vsx_scalar_ld_st.ll
  test/MC/Disassembler/PowerPC/vsx.txt
  test/MC/PowerPC/vsx.s

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