[all-commits] [llvm/llvm-project] 799935: [Clang] Add min/max reduction builtins.

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7999355106fb2fcc8de243d2e34b4b73ae4f3d2f
      https://github.com/llvm/llvm-project/commit/7999355106fb2fcc8de243d2e34b4b73ae4f3d2f
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2021-11-02 (Tue, 02 Nov 2021)

  Changed paths:
    M clang/include/clang/Basic/Builtins.def
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/include/clang/Sema/Sema.h
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/Sema/SemaChecking.cpp
    A clang/test/CodeGen/builtins-reduction-math.c
    A clang/test/Sema/builtins-reduction-math.c

  Log Message:
  -----------
  [Clang] Add min/max reduction builtins.

This patch implements __builtin_reduce_max and __builtin_reduce_min as
specified in D111529.

The order of operations does not matter for min or max reductions and
they can be directly lowered to the corresponding
llvm.vector.reduce.{fmin,fmax,umin,umax,smin,smax} intrinsic calls.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D112001