Fix PR819, llvm2cpp should read .bc files, not .ll files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29030 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 55 insertions, 82 deletions

diff --git a/tools/llvm2cpp/Makefile b/tools/llvm2cpp/Makefile
index 98948033e2..d6b65c8923 100644
--- a/tools/llvm2cpp/Makefile
+++ b/tools/llvm2cpp/Makefile
@@ -1,4 +1,4 @@
-##===- tools/llvm-as/Makefile ------------------------------*- Makefile -*-===##
+##===- tools/llvm2cpp/Makefile -----------------------------*- Makefile -*-===##
 # 
 #                     The LLVM Compiler Infrastructure
 #
@@ -8,8 +8,7 @@
 ##===----------------------------------------------------------------------===##
 LEVEL = ../..
 TOOLNAME = llvm2cpp
-USEDLIBS = LLVMAsmParser.a LLVMBCWriter.a LLVMCore.a \
-           LLVMSupport.a LLVMbzip2.a LLVMSystem.a
+USEDLIBS = LLVMBCReader.a LLVMCore.a LLVMSupport.a LLVMbzip2.a LLVMSystem.a
 
 include $(LEVEL)/Makefile.common
 
diff --git a/tools/llvm2cpp/llvm2cpp.cpp b/tools/llvm2cpp/llvm2cpp.cpp
index 7e322dbef8..8d3653ae22 100644
--- a/tools/llvm2cpp/llvm2cpp.cpp
+++ b/tools/llvm2cpp/llvm2cpp.cpp
@@ -17,8 +17,7 @@
 //===------------------------------------------------------------------------===
 
 #include "llvm/Module.h"
-#include "llvm/Assembly/Parser.h"
-#include "llvm/Bytecode/Writer.h"
+#include "llvm/Bytecode/Reader.h"
 #include "llvm/Analysis/Verifier.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/SystemUtils.h"
@@ -31,7 +30,7 @@
 using namespace llvm;
 
 static cl::opt<std::string>
-InputFilename(cl::Positional, cl::desc("<input LLVM assembly file>"), 
+InputFilename(cl::Positional, cl::desc("<input LLVM bytecode file>"), 
   cl::init("-"));
 
 static cl::opt<std::string>
@@ -41,100 +40,75 @@ OutputFilename("o", cl::desc("Override output filename"),
 static cl::opt<bool>
 Force("f", cl::desc("Overwrite output files"));
 
-static cl::opt<bool>
-DisableVerify("disable-verify", cl::Hidden,
-              cl::desc("Do not run verifier on input LLVM (dangerous!)"));
-
 int main(int argc, char **argv) {
   cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .cpp assembler\n");
   sys::PrintStackTraceOnErrorSignal();
 
   int exitCode = 0;
   std::ostream *Out = 0;
-  try {
-    // Parse the file now...
-    std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename));
-    if (M.get() == 0) {
-      std::cerr << argv[0] << ": assembly didn't read correctly.\n";
-      return 1;
-    }
+  std::string ErrorMessage;
+  std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
+  if (M.get() == 0) {
+    std::cerr << argv[0] << ": ";
+    if (ErrorMessage.size())
+      std::cerr << ErrorMessage << "\n";
+    else
+      std::cerr << "bytecode didn't read correctly.\n";
+    return 1;
+  }
 
-    // FIXME: llvm2cpp should read .bc files and thus not run the verifier
-    // explicitly!
-    if (!DisableVerify) {
-      std::string Err;
-      if (verifyModule(*M.get(), ReturnStatusAction, &Err)) {
-        std::cerr << argv[0]
-                  << ": assembly parsed, but does not verify as correct!\n";
-        std::cerr << Err;
+  if (OutputFilename != "") {   // Specified an output filename?
+    if (OutputFilename != "-") {  // Not stdout?
+      if (!Force && std::ifstream(OutputFilename.c_str())) {
+        // If force is not specified, make sure not to overwrite a file!
+        std::cerr << argv[0] << ": error opening '" << OutputFilename
+                  << "': file exists!\n"
+                  << "Use -f command line argument to force output\n";
         return 1;
-      } 
-    }
-
-    if (OutputFilename != "") {   // Specified an output filename?
-      if (OutputFilename != "-") {  // Not stdout?
-        if (!Force && std::ifstream(OutputFilename.c_str())) {
-          // If force is not specified, make sure not to overwrite a file!
-          std::cerr << argv[0] << ": error opening '" << OutputFilename
-                    << "': file exists!\n"
-                    << "Use -f command line argument to force output\n";
-          return 1;
-        }
-        Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
-                                std::ios::trunc | std::ios::binary);
-      } else {                      // Specified stdout
-        // FIXME: cout is not binary!
-        Out = &std::cout;
       }
+      Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
+                              std::ios::trunc | std::ios::binary);
+    } else {                      // Specified stdout
+      Out = &std::cout;
+    }
+  } else {
+    if (InputFilename == "-") {
+      OutputFilename = "-";
+      Out = &std::cout;
     } else {
-      if (InputFilename == "-") {
-        OutputFilename = "-";
-        Out = &std::cout;
+      std::string IFN = InputFilename;
+      int Len = IFN.length();
+      if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
+        // Source ends in .ll
+        OutputFilename = std::string(IFN.begin(), IFN.end()-3);
       } else {
-        std::string IFN = InputFilename;
-        int Len = IFN.length();
-        if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
-          // Source ends in .ll
-          OutputFilename = std::string(IFN.begin(), IFN.end()-3);
-        } else {
-          OutputFilename = IFN;   // Append a .cpp to it
-        }
-        OutputFilename += ".cpp";
-
-        if (!Force && std::ifstream(OutputFilename.c_str())) {
-          // If force is not specified, make sure not to overwrite a file!
-          std::cerr << argv[0] << ": error opening '" << OutputFilename
-                    << "': file exists!\n"
-                    << "Use -f command line argument to force output\n";
-          return 1;
-        }
+        OutputFilename = IFN;   // Append a .cpp to it
+      }
+      OutputFilename += ".cpp";
 
-        Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
-                                std::ios::trunc | std::ios::binary);
-        // Make sure that the Out file gets unlinked from the disk if we get a
-        // SIGINT
-        sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+      if (!Force && std::ifstream(OutputFilename.c_str())) {
+        // If force is not specified, make sure not to overwrite a file!
+        std::cerr << argv[0] << ": error opening '" << OutputFilename
+                  << "': file exists!\n"
+                  << "Use -f command line argument to force output\n";
+        return 1;
       }
-    }
 
-    if (!Out->good()) {
-      std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
-      return 1;
+      Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
+                              std::ios::trunc | std::ios::binary);
+      // Make sure that the Out file gets unlinked from the disk if we get a
+      // SIGINT
+      sys::RemoveFileOnSignal(sys::Path(OutputFilename));
     }
+  }
 
-    WriteModuleToCppFile(M.get(), *Out);
-
-  } catch (const ParseException &E) {
-    std::cerr << argv[0] << ": " << E.getMessage() << "\n";
-    exitCode = 1;
-  } catch (const std::string& msg) {
-    std::cerr << argv[0] << ": " << msg << "\n";
-    exitCode = 1;
-  } catch (...) {
-    std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
-    exitCode = 1;
+  if (!Out->good()) {
+    std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
+    return 1;
   }
 
+  WriteModuleToCppFile(M.get(), *Out);
+
   if (Out != &std::cout) delete Out;
   return exitCode;
 }