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-link/llvm-link.cpp b/tools/llvm-link/llvm-link.cpp
new file mode 100644
index 0000000..5db13aa
--- /dev/null
+++ b/tools/llvm-link/llvm-link.cpp
@@ -0,0 +1,150 @@
+//===- llvm-link.cpp - Low-level LLVM linker ------------------------------===//
+//
+// 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-link a.bc b.bc c.bc -o x.bc
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Linker.h"
+#include "llvm/Module.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/System/Signals.h"
+#include "llvm/System/Path.h"
+#include <fstream>
+#include <iostream>
+#include <memory>
+using namespace llvm;
+
+static cl::list<std::string>
+InputFilenames(cl::Positional, cl::OneOrMore,
+ cl::desc("<input bitcode files>"));
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"), cl::init("-"),
+ cl::value_desc("filename"));
+
+static cl::opt<bool> Force("f", cl::desc("Overwrite output files"));
+
+static cl::opt<bool>
+Verbose("v", cl::desc("Print information about actions taken"));
+
+static cl::opt<bool>
+DumpAsm("d", cl::desc("Print assembly as linked"), cl::Hidden);
+
+// LoadFile - Read the specified bitcode file in and return it. This routine
+// searches the link path for the specified file to try to find it...
+//
+static inline std::auto_ptr<Module> LoadFile(const std::string &FN) {
+ sys::Path Filename;
+ if (!Filename.set(FN)) {
+ cerr << "Invalid file name: '" << FN << "'\n";
+ return std::auto_ptr<Module>();
+ }
+
+ std::string ErrorMessage;
+ if (Filename.exists()) {
+ if (Verbose) cerr << "Loading '" << Filename.c_str() << "'\n";
+ Module* Result = 0;
+
+ const std::string &FNStr = Filename.toString();
+ if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(FNStr,
+ &ErrorMessage)) {
+ Result = ParseBitcodeFile(Buffer, &ErrorMessage);
+ delete Buffer;
+ }
+ if (Result) return std::auto_ptr<Module>(Result); // Load successful!
+
+ if (Verbose) {
+ cerr << "Error opening bitcode file: '" << Filename.c_str() << "'";
+ if (ErrorMessage.size()) cerr << ": " << ErrorMessage;
+ cerr << "\n";
+ }
+ } else {
+ cerr << "Bitcode file: '" << Filename.c_str() << "' does not exist.\n";
+ }
+
+ return std::auto_ptr<Module>();
+}
+
+int main(int argc, char **argv) {
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, " llvm linker\n");
+ sys::PrintStackTraceOnErrorSignal();
+ assert(InputFilenames.size() > 0 && "OneOrMore is not working");
+
+ unsigned BaseArg = 0;
+ std::string ErrorMessage;
+
+ std::auto_ptr<Module> Composite(LoadFile(InputFilenames[BaseArg]));
+ if (Composite.get() == 0) {
+ cerr << argv[0] << ": error loading file '"
+ << InputFilenames[BaseArg] << "'\n";
+ return 1;
+ }
+
+ for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
+ std::auto_ptr<Module> M(LoadFile(InputFilenames[i]));
+ if (M.get() == 0) {
+ cerr << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
+ return 1;
+ }
+
+ if (Verbose) cerr << "Linking in '" << InputFilenames[i] << "'\n";
+
+ if (Linker::LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
+ cerr << argv[0] << ": link error in '" << InputFilenames[i]
+ << "': " << ErrorMessage << "\n";
+ return 1;
+ }
+ }
+
+ // TODO: Iterate over the -l list and link in any modules containing
+ // global symbols that have not been resolved so far.
+
+ if (DumpAsm) cerr << "Here's the assembly:\n" << *Composite.get();
+
+ // FIXME: cout is not binary!
+ std::ostream *Out = &std::cout; // Default to printing to stdout...
+ if (OutputFilename != "-") {
+ 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!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+ std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
+ std::ios::binary;
+ Out = new std::ofstream(OutputFilename.c_str(), io_mode);
+ if (!Out->good()) {
+ cerr << argv[0] << ": error opening '" << OutputFilename << "'!\n";
+ return 1;
+ }
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+ }
+
+ if (verifyModule(*Composite.get())) {
+ cerr << argv[0] << ": linked module is broken!\n";
+ return 1;
+ }
+
+ if (Verbose) cerr << "Writing bitcode...\n";
+ WriteBitcodeToFile(Composite.get(), *Out);
+
+ if (Out != &std::cout) delete Out;
+ return 0;
+}