[PATCH] D48526: [Power9] Add six __float128 builtins found in gcc

[Stefan Pintilie via Phabricator via llvm-commits]

stefanp created this revision.
stefanp added reviewers: nemanjai, kbarton, hfinkel, sfertile, syzaara, lei.

The following 6 builtins are found in GCC:

  __float128 __builtin_infq (void)
  __float128 __builtin_huge_valq (void)
  __float128 __builtin_nanq (void)
  __float128 __builtin_nansq (void)
  __float128 __builtin_fabsq (__float128)
  __float128 __builtin_copysignq (__float128, __float128)

This patch adds them to clang as well.
They should do the exact same thing as the f128 version of the same builtin. (So,  __float128 __builtin_nanq (void) should behave the same way as __float128 __builtin_nanf128 (void)).
The reason for adding these builtins is to support code that uses the initial GCC naming for them.


https://reviews.llvm.org/D48526

Files:
  include/clang/Basic/Builtins.def
  lib/AST/ExprConstant.cpp
  lib/CodeGen/CGBuiltin.cpp
  test/CodeGen/builtins-ppc-p9-f128.c
  test/Sema/constant-builtins-2.c

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