Add workaround to allow testing of ARM integrated assembler.

src/IceClFlags.cpp

Index: src/IceClFlags.cpp
diff --git a/src/IceClFlags.cpp b/src/IceClFlags.cpp
index 1f4f3956a00b57c2061c4e1a4c0fedc7458d76b1..1e194a12b8a902b7c2fe3e221bf4e3dbe9dc2eaa 100644
--- a/src/IceClFlags.cpp
+++ b/src/IceClFlags.cpp
@@ -50,6 +50,12 @@ cl::opt<bool> AllowIacaMarks(
              "inserted. These binaries are not executable."),
     cl::init(false));
 
+cl::opt<bool> AllowUnsafeIas(
+    "unsafe-ias",
+    cl::desc("Convert (potentially broken) instructions to bytes in "
+             "integrated assembler."),
+    cl::init(false));
+
 // This is currently needed by crosstest.py.
 cl::opt<bool> AllowUninitializedGlobals(
     "allow-uninitialized-globals",
@@ -382,6 +388,7 @@ void ClFlags::resetClFlags(ClFlags &OutFlags) {
   OutFlags.AllowErrorRecovery = false;
   OutFlags.AllowExternDefinedSymbols = false;
   OutFlags.AllowIacaMarks = false;
+  OutFlags.AllowUnsafeIas = false;
   OutFlags.AllowUninitializedGlobals = false;
   OutFlags.DataSections = false;
   OutFlags.DecorateAsm = false;
@@ -456,6 +463,7 @@ void ClFlags::getParsedClFlags(ClFlags &OutFlags) {
   OutFlags.setDisableInternal(::DisableInternal);
   OutFlags.setDisableIRGeneration(::DisableIRGeneration);
   OutFlags.setDisableTranslation(::DisableTranslation);
+  OutFlags.setAllowUnsafeIas(::AllowUnsafeIas);
   OutFlags.setDumpStats(::DumpStats);
   OutFlags.setEnableBlockProfile(::EnableBlockProfile);
   OutFlags.setForceMemIntrinOpt(::ForceMemIntrinOpt);