Commit For New Tool: llvm-abcd (Analysis of ByteCode Dumper). This tool

will (eventually) provide statistical analysis of bytecode files as well
as the ability to dump them in a low level format (slot numbers not
resolved). The purpose of this is to aid in the Type!=Value change of
bug 122. With this initial release, llvm-abcd merely dumps out the
bytecode. However, the infrastructure for separating bytecode parsing from
handling the parsing events is in place. The style chosen is similar to
SAX XML parsing where a handler object is called to handlign the parsing
events. This probably isn't useful to anyone but me right now as there is
no analysis yet, and the dumper doesn't work on every bytecode file. It
will probably be useful by the end of this week. Note that there is some
duplication of code from the bytecode reader.  This was done to eliminate
errors from being introduced in the reader and to minimize the impact to
other LLVM developers. At some point, the Analyzer and the Reader will be
integrated to use the same infrastructure. Also, sorry for the minor change
to Instruction.h but I just couldn't bring myself to write code that
depends on Instruction internals.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14048 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 130 insertions, 1 deletions

diff --git a/tools/Makefile b/tools/Makefile
index bc252aa..dd03498 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -9,7 +9,8 @@
 
 LEVEL := ..
 PARALLEL_DIRS := llvm-as llvm-dis opt gccas llc llvm-link lli gccld llvm-stub \
-                 analyze extract bugpoint llvm-nm llvm-prof llvm-db llvm-ar
+                 analyze extract bugpoint llvm-nm llvm-prof llvm-db llvm-ar \
+		 llvm-abcd
 
 include $(LEVEL)/Makefile.common
 
diff --git a/tools/llvm-abcd/Makefile b/tools/llvm-abcd/Makefile
new file mode 100644
index 0000000..f85c208
--- /dev/null
+++ b/tools/llvm-abcd/Makefile
@@ -0,0 +1,13 @@
+##===- tools/llvm-abcd/Makefile ----------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file was developed by Reid Spencer and is distributed under the 
+# University of Illinois Open Source License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+LEVEL = ../..
+
+TOOLNAME = llvm-abcd
+USEDLIBS = bcanalyzer vmcore support.a
+include $(LEVEL)/Makefile.common
diff --git a/tools/llvm-abcd/llvm-abcd.cpp b/tools/llvm-abcd/llvm-abcd.cpp
new file mode 100644
index 0000000..22ab0b0
--- /dev/null
+++ b/tools/llvm-abcd/llvm-abcd.cpp
@@ -0,0 +1,115 @@
+//===-- llvm-dis.cpp - The low-level LLVM disassembler --------------------===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This utility may be invoked in the following manner:
+//  llvm-dis [options]      - Read LLVM bytecode from stdin, write asm to stdout
+//  llvm-dis [options] x.bc - Read LLVM bytecode from the x.bc file, write asm
+//                            to the x.ll file.
+//  Options:
+//      --help   - Output information about command line switches
+//       -c      - Print C code instead of LLVM assembly
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Bytecode/Analyzer.h"
+#include "Support/CommandLine.h"
+#include "llvm/System/Signals.h"
+#include <fstream>
+#include <iostream>
+
+using namespace llvm;
+
+static cl::opt<std::string>
+  InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
+
+static cl::opt<std::string> 
+  OutputFilename("o", cl::desc("Override output filename"), 
+    cl::value_desc("filename"));
+
+static cl::opt<bool> Force      ("f", cl::desc("Overwrite output files"));
+static cl::opt<bool> Detailed   ("d", cl::desc("Detailed output"));
+
+int 
+main(int argc, char **argv) 
+{
+  cl::ParseCommandLineOptions(argc, argv, 
+    " llvm-abcd Analysis of ByteCode Dumper\n");
+
+  PrintStackTraceOnErrorSignal();
+
+  std::ostream* Out = &std::cout;  // Default to printing to stdout...
+  std::istream* In  = &std::cin;   // Default to reading stdin
+  std::string ErrorMessage;
+  BytecodeAnalysis bca;
+
+  /// Analyze the bytecode file
+  AnalyzeBytecodeFile(InputFilename, bca, &ErrorMessage);
+
+  // If there was an error, print it and stop.
+  if ( ErrorMessage.size() ) {
+    std::cerr << argv[0] << ": " << ErrorMessage << "\n";
+    return 1;
+  }
+  
+  // Figure out where the output is going
+  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! Sending to standard output.\n";
+      } else {
+        Out = new std::ofstream(OutputFilename.c_str());
+      }
+    }
+  } else {
+    if (InputFilename == "-") {
+      OutputFilename = "-";
+    } else {
+      std::string IFN = InputFilename;
+      int Len = IFN.length();
+      if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
+	// Source ends in .bc
+	OutputFilename = std::string(IFN.begin(), IFN.end()-3)+".abc";
+      } else {
+	OutputFilename = IFN+".abc";
+      }
+
+      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! Sending to standard output.\n";
+      } else {
+        Out = new std::ofstream(OutputFilename.c_str());
+
+        // Make sure that the Out file gets unlinked from the disk if we get a
+        // SIGINT
+        RemoveFileOnSignal(OutputFilename);
+      }
+    }
+  }
+
+  if (!Out->good()) {
+    std::cerr << argv[0] << ": error opening " << OutputFilename
+              << ": sending to stdout instead!\n";
+    Out = &std::cout;
+  }
+
+  // All that abcd does is write the gathered statistics to the output
+  bca.dumpBytecode = true;
+  PrintBytecodeAnalysis(bca,*Out);
+
+  if (Out != &std::cout) {
+    ((std::ofstream*)Out)->close();
+    delete Out;
+  }
+  return 0;
+}
+
+// vim: sw=2