[all-commits] [llvm/llvm-project] ef1ca4: [AArch64] Fix incorrect use of MVT::getVectorNumEl...

[david-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ef1ca4d3e965e76d190cdf3c6d6d4f8db67e7a2b
      https://github.com/llvm/llvm-project/commit/ef1ca4d3e965e76d190cdf3c6d6d4f8db67e7a2b
  Author: David Sherwood <david.sherwood at arm.com>
  Date:   2022-01-13 (Thu, 13 Jan 2022)

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

  Log Message:
  -----------
  [AArch64] Fix incorrect use of MVT::getVectorNumElements in AArch64TTIImpl::getVectorInstrCost

If we are inserting into or extracting from a scalable vector we do
not know the number of elements at runtime, so we can only let the
index wrap for fixed-length vectors.

Tests added here:

  Analysis/CostModel/AArch64/sve-insert-extract.ll

Differential Revision: https://reviews.llvm.org/D117099