Update Subzero to start parsing PNaCl bitcode files.

src/llvm2ice.cpp

Index: src/llvm2ice.cpp
diff --git a/src/llvm2ice.cpp b/src/llvm2ice.cpp
index 6d26cff53050f81a786b04a7a70d6d06991546da..a4552e4624ace37bb78c6ec93d807c028f8f9c39 100644
--- a/src/llvm2ice.cpp
+++ b/src/llvm2ice.cpp
@@ -18,6 +18,7 @@
 #include "IceDefs.h"
 #include "IceTargetLowering.h"
 #include "IceTypes.h"
+#include "PNaClTranslator.h"
 
 #include "llvm/IR/Constant.h"
 #include "llvm/IR/Constants.h"
@@ -128,9 +129,14 @@ int main(int argc, char **argv) {
 
   Ice::GlobalContext Ctx(Ls, Os, VMask, TargetArch, OptLevel, TestPrefix);
 
+  Ice::ClFlags Flags;
+  Flags.DisableInternal = DisableInternal;
+  Flags.SubzeroTimingEnabled = SubzeroTimingEnabled;
+  Flags.DisableTranslation = DisableTranslation;
+
   if (BuildOnRead) {
-    std::cerr << "Direct build from bitcode not implemented yet!\n";
-    return 1;
+    Ice::PNaClTranslator translator(&Ctx, Flags);
+    return translator.translate(IRFilename);
   } else {
     // Parse the input LLVM IR file into a module.
     SMDiagnostic Err;
@@ -189,8 +195,7 @@ int main(int argc, char **argv) {
     }
     GlobalLowering.reset();
 
-    Ice::Converter Converter(&Ctx, DisableInternal, SubzeroTimingEnabled,
-                             DisableTranslation);
+    Ice::Converter Converter(&Ctx, Flags);
     return Converter.convertToIce(Mod);
   }
 }