[AIX] Add mabi=vec-extabi options to enable the AIX extended and default vector ABIs.

Added support for the options mabi=vec-extabi and mabi=vec-default which are analogous to qvecnvol and qnovecnvol when using XL on AIX.
The extended Altivec ABI on AIX is enabled using mabi=vec-extabi in clang and vec-extabi in llc.

Reviewed By: Xiangling_L, DiggerLin

Differential Revision: https://reviews.llvm.org/D89684

1 files changed, 17 insertions, 0 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index f4b7f68..144bbe8 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1434,6 +1434,22 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
                       !Args.hasArg(OPT_fvisibility)))
     Opts.IgnoreXCOFFVisibility = 1;
 
+  if (Arg *A =
+          Args.getLastArg(OPT_mabi_EQ_vec_default, OPT_mabi_EQ_vec_extabi)) {
+    if (!T.isOSAIX())
+      Diags.Report(diag::err_drv_unsupported_opt_for_target)
+          << A->getSpelling() << T.str();
+
+    const Option &O = A->getOption();
+    if (O.matches(OPT_mabi_EQ_vec_default))
+      Diags.Report(diag::err_aix_default_altivec_abi)
+          << A->getSpelling() << T.str();
+    else {
+      assert(O.matches(OPT_mabi_EQ_vec_extabi));
+      Opts.EnableAIXExtendedAltivecABI = 1;
+    }
+  }
+
   Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
   Opts.LinkerOptions = Args.getAllArgValues(OPT_linker_option);
   bool NeedLocTracking = false;
@@ -3068,6 +3084,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
                             ? 128
                             : Args.hasArg(OPT_mlong_double_64) ? 64 : 0;
   Opts.PPCIEEELongDouble = Args.hasArg(OPT_mabi_EQ_ieeelongdouble);
+  Opts.EnableAIXExtendedAltivecABI = Args.hasArg(OPT_mabi_EQ_vec_extabi);
   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
   Opts.ROPI = Args.hasArg(OPT_fropi);
   Opts.RWPI = Args.hasArg(OPT_frwpi);