It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-dis/llvm-dis.cpp b/tools/llvm-dis/llvm-dis.cpp
new file mode 100644
index 0000000..0c87f8c
--- /dev/null
+++ b/tools/llvm-dis/llvm-dis.cpp
@@ -0,0 +1,138 @@
+//===-- 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 bitcode from stdin, write asm to stdout
+// llvm-dis [options] x.bc - Read LLVM bitcode from the x.bc file, write asm
+// to the x.ll file.
+// Options:
+// --help - Output information about command line switches
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Module.h"
+#include "llvm/PassManager.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Assembly/PrintModulePass.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/System/Signals.h"
+#include <iostream>
+#include <fstream>
+#include <memory>
+using namespace llvm;
+
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input bitcode>"), 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>
+DontPrint("disable-output", cl::desc("Don't output the .ll file"), cl::Hidden);
+
+int main(int argc, char **argv) {
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
+ try {
+ cl::ParseCommandLineOptions(argc, argv, " llvm .bc -> .ll disassembler\n");
+ sys::PrintStackTraceOnErrorSignal();
+
+ std::ostream *Out = &std::cout; // Default to printing to stdout.
+ std::string ErrorMessage;
+
+ std::auto_ptr<Module> M;
+
+ if (MemoryBuffer *Buffer
+ = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+ M.reset(ParseBitcodeFile(Buffer, &ErrorMessage));
+ delete Buffer;
+ }
+
+ if (M.get() == 0) {
+ cerr << argv[0] << ": ";
+ if (ErrorMessage.size())
+ cerr << ErrorMessage << "\n";
+ else
+ cerr << "bitcode didn't read correctly.\n";
+ return 1;
+ }
+
+ if (DontPrint) {
+ // Just use stdout. We won't actually print anything on it.
+ } else 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!
+ 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)+".ll";
+ } else {
+ OutputFilename = IFN+".ll";
+ }
+
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ 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
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+ }
+ }
+ }
+
+ if (!Out->good()) {
+ cerr << argv[0] << ": error opening " << OutputFilename
+ << ": sending to stdout instead!\n";
+ Out = &std::cout;
+ }
+
+ // All that llvm-dis does is write the assembly to a file.
+ if (!DontPrint) {
+ PassManager Passes;
+ OStream L(*Out);
+ Passes.add(new PrintModulePass(&L));
+ Passes.run(*M.get());
+ }
+
+ if (Out != &std::cout) {
+ ((std::ofstream*)Out)->close();
+ delete Out;
+ }
+ return 0;
+ } catch (const std::string& msg) {
+ cerr << argv[0] << ": " << msg << "\n";
+ } catch (...) {
+ cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+ }
+
+ return 1;
+}
+