[all-commits] [llvm/llvm-project] 39e467: [PowerPC] Provide doubleword vector predicate form...

[Nemanja Ivanovic via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 39e4676ca798d9aba58823515ac9d48eb64863be
      https://github.com/llvm/llvm-project/commit/39e4676ca798d9aba58823515ac9d48eb64863be
  Author: Nemanja Ivanovic <nemanja.i.ibm at gmail.com>
  Date:   2021-05-13 (Thu, 13 May 2021)

  Changed paths:
    M clang/lib/Headers/altivec.h
    M clang/test/CodeGen/builtins-ppc-p8vector.c
    M clang/test/CodeGen/builtins-ppc-vsx.c
    M llvm/lib/Target/PowerPC/PPCISelLowering.cpp
    M llvm/lib/Target/PowerPC/PPCInstrVSX.td
    A llvm/test/CodeGen/PowerPC/vec_cmpd_p7.ll

  Log Message:
  -----------
  [PowerPC] Provide doubleword vector predicate form comparisons on Power7

There are two reasons this shouldn't be restricted to Power8 and up:
1. For XL compatibility
2. Because clang will expand comparison operators to these intrinsics*

*Without this patch, the following causes a selection error:

int test(vector signed long a, vector signed long b) {
  return a < b;
}

This patch provides the handling for the intrinsics in the back
end and removes the Power8 guards from the predicate functions
(vec_{all|any}_{eq|ne|gt|ge|lt|le}).