Fix a bugs with using some Mach-O command line flags like "-arch armv7m".

The Mach-O command line flag like "-arch armv7m" does not match the
arch name part of its llvm Triple which is "thumbv7m-apple-darwin”.

I think the best way to fix this is to have
llvm::object::MachOObjectFile::getArchTriple() optionally return the
name of the Mach-O arch flag that would be used with -arch that
matches the CPUType and CPUSubType.  Then change
llvm::object::MachOUniversalBinary::ObjectForArch::getArchTypeName()
to use that and change it to getArchFlagName() as the type name is
really part of the Triple and the -arch flag name is a Mach-O thing
for a specific Triple with a specific Mcpu value.

rdar://29663637

llvm-svn: 290001

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp b/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
index f3e16dc6f00..84fa0e4d2d9 100644
--- a/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
+++ b/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
@@ -112,7 +112,7 @@ static void DumpInput(StringRef Filename) {
       auto MachOOrErr = ObjForArch.getAsObjectFile();
       error(Filename, errorToErrorCode(MachOOrErr.takeError()));
       DumpObjectFile(**MachOOrErr,
-                     Filename + " (" + ObjForArch.getArchTypeName() + ")");
+                     Filename + " (" + ObjForArch.getArchFlagName() + ")");
     }
 }