teach llvm-dis to read bitcode files

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36334 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 9 insertions, 4 deletions

diff --git a/tools/llvm-dis/Makefile b/tools/llvm-dis/Makefile
index 6be8b096db..4b1088aec9 100644
--- a/tools/llvm-dis/Makefile
+++ b/tools/llvm-dis/Makefile
@@ -9,7 +9,7 @@
 LEVEL = ../..
 
 TOOLNAME = llvm-dis
-LINK_COMPONENTS := bcreader
+LINK_COMPONENTS := bcreader bitreader
 REQUIRES_EH := 1
 
 include $(LEVEL)/Makefile.common
diff --git a/tools/llvm-dis/llvm-dis.cpp b/tools/llvm-dis/llvm-dis.cpp
index 38b863c20c..7a8bf5afc8 100644
--- a/tools/llvm-dis/llvm-dis.cpp
+++ b/tools/llvm-dis/llvm-dis.cpp
@@ -18,6 +18,7 @@
 
 #include "llvm/Module.h"
 #include "llvm/PassManager.h"
+#include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Bytecode/Reader.h"
 #include "llvm/Assembly/PrintModulePass.h"
 #include "llvm/Support/Compressor.h"
@@ -52,9 +53,13 @@ int main(int argc, char **argv) {
     std::ostream *Out = &std::cout;  // Default to printing to stdout.
     std::string ErrorMessage;
 
-    std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, 
-                                              Compressor::decompressToNewBuffer,
-                                              &ErrorMessage));
+    std::auto_ptr<Module> M;
+    
+    M.reset(ParseBitcodeFile(InputFilename, &ErrorMessage));
+    
+    if (M.get() == 0)
+      M.reset(ParseBytecodeFile(InputFilename,Compressor::decompressToNewBuffer,
+                                &ErrorMessage));
     if (M.get() == 0) {
       cerr << argv[0] << ": ";
       if (ErrorMessage.size())