PNaCl bitcode: Fix reader to handle pointer type in is.lock.free intrinsic

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3671
TEST=test/NaCl/Bitcode/*.ll
   + NaCl's toolchain_tests with bitcode v2 enabled

Review URL: https://codereview.chromium.org/23523041

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/Bitcode/NaCl/Reader/NaClBitcodeReader.cpp b/lib/Bitcode/NaCl/Reader/NaClBitcodeReader.cpp
index f5fd1ba0e7..c826ab3353 100644
--- a/lib/Bitcode/NaCl/Reader/NaClBitcodeReader.cpp
+++ b/lib/Bitcode/NaCl/Reader/NaClBitcodeReader.cpp
@@ -809,6 +809,9 @@ FunctionType *NaClBitcodeReader::AddPointerTypesToIntrinsicType(
   } else if (Name.startswith("llvm.nacl.atomic.rmw.")) {
     assert(ArgTypes.size() >= 3);
     ArgTypes[1] = ArgTypes[2]->getPointerTo();
+  } else if (Name == "llvm.nacl.atomic.is.lock.free") {
+    assert(ArgTypes.size() >= 2);
+    ArgTypes[1] = Type::getInt8PtrTy(Context);
   }
   return FunctionType::get(ReturnTy, ArgTypes, false);
 }