[Triple] Add isThumb and isARM functions.

Summary:
isThumb returns true for Thumb triples (little and big endian), isARM
returns true for ARM triples (little and big endian).
There are a few more checks using arm/thumb that are not covered by
those functions, e.g. that the architecture is either ARM or Thumb
(little endian) or ARM/Thumb little endian only.

Reviewers: javed.absar, rengolin, kristof.beyls, t.p.northover

Reviewed By: rengolin

Subscribers: llvm-commits, aemerson

Differential Revision: https://reviews.llvm.org/D34682

llvm-svn: 310781

1 files changed, 1 insertions, 5 deletions

diff --git a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
index 582153daebd..94bb9cbbb8a 100644
--- a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -476,11 +476,7 @@ void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
   // Use the triple's architecture and subarchitecture to determine
   // if we're thumb for the purposes of the top level code16 assembler
   // flag.
-  bool isThumb = TT.getArch() == Triple::thumb ||
-                 TT.getArch() == Triple::thumbeb ||
-                 TT.getSubArch() == Triple::ARMSubArch_v7m ||
-                 TT.getSubArch() == Triple::ARMSubArch_v6m;
-  if (!M.getModuleInlineAsm().empty() && isThumb)
+  if (!M.getModuleInlineAsm().empty() && TT.isThumb())
     OutStreamer->EmitAssemblerFlag(MCAF_Code16);
 }