Recognize arm triplets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68229 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/lto/LTOCodeGenerator.cpp b/tools/lto/LTOCodeGenerator.cpp
index b83b079..0d30715 100644
--- a/tools/lto/LTOCodeGenerator.cpp
+++ b/tools/lto/LTOCodeGenerator.cpp
@@ -240,6 +240,27 @@
             args.push_back("-arch");
             args.push_back("ppc64");
         }
+        else if (strncmp(targetTriple.c_str(), "arm-apple-", 10) == 0) {
+            args.push_back("-arch");
+            args.push_back("arm");
+        }
+        else if ((strncmp(targetTriple.c_str(), "armv4t-apple-", 13) == 0) ||
+                 (strncmp(targetTriple.c_str(), "thumbv4t-apple-", 15) == 0)) {
+            args.push_back("-arch");
+            args.push_back("armv4t");
+        }
+        else if ((strncmp(targetTriple.c_str(), "armv5-apple-", 12) == 0) ||
+                 (strncmp(targetTriple.c_str(), "armv5e-apple-", 13) == 0) ||
+                 (strncmp(targetTriple.c_str(), "thumbv5-apple-", 14) == 0) ||
+                 (strncmp(targetTriple.c_str(), "thumbv5e-apple-", 15) == 0)) {
+            args.push_back("-arch");
+            args.push_back("armv5");
+        }
+        else if ((strncmp(targetTriple.c_str(), "armv6-apple-", 12) == 0) ||
+                 (strncmp(targetTriple.c_str(), "thumbv6-apple-", 14) == 0)) {
+            args.push_back("-arch");
+            args.push_back("armv6");
+        }
     }
     args.push_back("-c");
     args.push_back("-x");