[PATCH] D106744: [SVE] Use reg+reg addressing mode for immediate offsets.

[Paul Walker via Phabricator via llvm-commits]

paulwalker-arm created this revision.
Herald added subscribers: psnobl, hiraditya, tschuett.
Herald added a reviewer: efriedma.
paulwalker-arm requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

For reg+imm SVE addressing mode imm is implictly scaled by VL,
making them impractical for truely immediate offsets.  However, if
the offset can be unscaled based on the storage element type we
can use the reg+reg SVE addressing mode and thus either reduce the
number of generate add instructions or replace them with a mov
instruction that can be hoisted from the hot code path.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106744

Files:
  llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
  llvm/test/CodeGen/AArch64/named-vector-shuffles-sve.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-bit-counting.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-float-compares.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-fp-arith.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-fp-extend-trunc.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-fp-minmax.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-fp-reduce.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-fp-rounding.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-fp-to-int.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-int-compares.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-int-extends.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-int-minmax.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-int-reduce.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-int-shifts.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-int-to-fp.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-loads.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-log-reduce.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-masked-gather.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-masked-scatter.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-rev.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-splat-vector.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-stores.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-trunc-stores.ll
  llvm/test/CodeGen/AArch64/sve-fixed-length-vector-shuffle.ll
  llvm/test/CodeGen/AArch64/sve-intrinsics-ld1ro-addressing-mode-reg-imm.ll
  llvm/test/CodeGen/AArch64/sve-vscale-attr.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D106744.361449.patch
Type: text/x-patch
Size: 212033 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20210724/dcffd5e2/attachment-0001.bin>