Adding profile and version parsers to ARMTargetParser

This allows us to match armv6m to default to thumb, but will also be used by
Clang's driver and remove the current incomplete copy in it.

llvm-svn: 238036

1 files changed, 10 insertions, 2 deletions

diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
index b862dbd..6ef50a5 100644
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -281,8 +281,16 @@ static Triple::ArchType parseARMArch(StringRef ArchName) {
       (ArchName.startswith("v2") || ArchName.startswith("v3")))
     return Triple::UnknownArch;
 
-  // FIXME: Add isMProfile to ARMTargetParser and
-  // either change armv6m to thumb or UnknownArch.
+  // Thumb only for v6m
+  unsigned Profile = ARMTargetParser::parseArchProfile(ArchName);
+  unsigned Version = ARMTargetParser::parseArchVersion(ArchName);
+  if (Profile == ARM::PK_M && Version == 6) {
+    if (ENDIAN == ARM::EK_BIG)
+      return Triple::thumbeb;
+    else
+      return Triple::thumb;
+  }
+
   return arch;
 }