[all-commits] [llvm/llvm-project] 67a3d1: [PowerPC] swdiv builtins for XL compatibility

[Quinn Pham via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 67a3d1e2755152608fcb1737f7d0519121e037b7
      https://github.com/llvm/llvm-project/commit/67a3d1e2755152608fcb1737f7d0519121e037b7
  Author: Quinn Pham <quinn.pham at ibm.com>
  Date:   2021-09-29 (Wed, 29 Sep 2021)

  Changed paths:
    M clang/include/clang/Basic/BuiltinsPPC.def
    M clang/lib/Basic/Targets/PPC.cpp
    M clang/lib/CodeGen/CGBuiltin.cpp
    A clang/test/CodeGen/builtins-ppc-xlcompat-swdiv.c
    M llvm/test/CodeGen/PowerPC/fdiv.ll

  Log Message:
  -----------
  [PowerPC] swdiv builtins for XL compatibility

This patch is in a series of patches to provide builtins for compatibility with
the XL compiler. This patch implements the software divide builtin as
wrappers for a floating point divide. XL provided these builtins because it
didn't produce software estimates by default at `-Ofast`. When compiled
with `-Ofast` these builtins will produce the software estimate for divide.

Reviewed By: #powerpc, nemanjai

Differential Revision: https://reviews.llvm.org/D106959