[all-commits] [llvm/llvm-project] 0934fa: [AArch64][SVE] SVE functions should use the SVE ca...

[Bradley Smith via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0934fa4f5d5b07856a73b5dddd395f70c8a3fa84
      https://github.com/llvm/llvm-project/commit/0934fa4f5d5b07856a73b5dddd395f70c8a3fa84
  Author: Bradley Smith <bradley.smith at arm.com>
  Date:   2021-04-01 (Thu, 01 Apr 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/sve-calling-convention.ll
    M llvm/test/CodeGen/AArch64/sve-tailcall.ll

  Log Message:
  -----------
  [AArch64][SVE] SVE functions should use the SVE calling convention for fast calls

When an SVE function calls another SVE function using the C calling
convention we use the more efficient SVE VectorCall PCS.  However,
for the Fast calling convention we're incorrectly falling back to
the generic AArch64 PCS.

This patch adds the same "can use SVE vector calling convention"
detection used by CallingConv::C to CallingConv::Fast.

Co-authored-by: Paul Walker <paul.walker at arm.com>

Differential Revision: https://reviews.llvm.org/D99657