[all-commits] [llvm/llvm-project] d581d9: [SVE] Fix the FP arithmetic instruction costs for SVE

[david-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d581d943858195f14863ee8f2a5050aafed883a2
      https://github.com/llvm/llvm-project/commit/d581d943858195f14863ee8f2a5050aafed883a2
  Author: David Sherwood <david.sherwood at arm.com>
  Date:   2021-09-02 (Thu, 02 Sep 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
    A llvm/test/Analysis/CostModel/AArch64/arith-fp-sve.ll
    M llvm/test/Analysis/CostModel/AArch64/sve-intrinsics.ll
    M llvm/test/Analysis/CostModel/AArch64/sve-math.ll

  Log Message:
  -----------
  [SVE] Fix the FP arithmetic instruction costs for SVE

Several FP instructions (fadd, fsub, etc.) were incorrectly assigned
a higher cost for SVE because they have custom lowering, however we
know they are legal. This patch explicitly assigns a cost of 2 to
these opcodes.

Tests added here:

  Analysis/CostModel/AArch64/arith-fp-sve.ll

Differential Revision: https://reviews.llvm.org/D108993