[Fixed Point Arithmetic] Rename `-fsame-fbits` flag

- Rename the `-fsame-fbits` flag to `-fpadding-on-unsigned-fixed-point`
- Move the flag from a driver option to a cc1 option
- Rename the `SameFBits` member in TargetInfo to `PaddingOnUnsignedFixedPoint`
- Updated descriptions

Differential Revision: https://reviews.llvm.org/D48727

llvm-svn: 335993

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 26414f1a52c..3335ccb4fce 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -2338,8 +2338,9 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   Opts.FixedPoint =
       Args.hasFlag(OPT_ffixed_point, OPT_fno_fixed_point, /*Default=*/false) &&
       !Opts.CPlusPlus;
-  Opts.SameFBits =
-      Args.hasFlag(OPT_fsame_fbits, OPT_fno_same_fbits,
+  Opts.PaddingOnUnsignedFixedPoint =
+      Args.hasFlag(OPT_fpadding_on_unsigned_fixed_point,
+                   OPT_fno_padding_on_unsigned_fixed_point,
                    /*Default=*/false) &&
       Opts.FixedPoint;