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-rw-r--r--tools/llvm-lto/CMakeLists.txt6
-rw-r--r--tools/llvm-lto/LLVMBuild.txt22
-rw-r--r--tools/llvm-lto/Makefile19
-rw-r--r--tools/llvm-lto/llvm-lto.cpp187
4 files changed, 234 insertions, 0 deletions
diff --git a/tools/llvm-lto/CMakeLists.txt b/tools/llvm-lto/CMakeLists.txt
new file mode 100644
index 0000000..348976c
--- /dev/null
+++ b/tools/llvm-lto/CMakeLists.txt
@@ -0,0 +1,6 @@
+set(LLVM_LINK_COMPONENTS ${LLVM_TARGETS_TO_BUILD} lto support)
+
+add_llvm_tool(llvm-lto
+ llvm-lto.cpp
+ )
+
diff --git a/tools/llvm-lto/LLVMBuild.txt b/tools/llvm-lto/LLVMBuild.txt
new file mode 100644
index 0000000..c1613a3
--- /dev/null
+++ b/tools/llvm-lto/LLVMBuild.txt
@@ -0,0 +1,22 @@
+;===- ./tools/llvm-lto/LLVMBuild.txt ----------------------------*- Conf -*--===;
+;
+; The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+; http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Tool
+name = llvm-lto
+parent = Tools
+required_libraries = LTO Support all-targets
diff --git a/tools/llvm-lto/Makefile b/tools/llvm-lto/Makefile
new file mode 100644
index 0000000..f1801b4
--- /dev/null
+++ b/tools/llvm-lto/Makefile
@@ -0,0 +1,19 @@
+##===- tools/llvm-lto/Makefile -----------------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL := ../..
+TOOLNAME := llvm-lto
+LINK_COMPONENTS := lto ipo scalaropts linker bitreader bitwriter mcdisassembler support target vectorize all-targets
+
+# This tool has no plugins, optimize startup time.
+TOOL_NO_EXPORTS := 1
+
+NO_INSTALL := 1
+
+include $(LEVEL)/Makefile.common
diff --git a/tools/llvm-lto/llvm-lto.cpp b/tools/llvm-lto/llvm-lto.cpp
new file mode 100644
index 0000000..0fc68ae
--- /dev/null
+++ b/tools/llvm-lto/llvm-lto.cpp
@@ -0,0 +1,187 @@
+//===-- llvm-lto: a simple command-line program to link modules with LTO --===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This program takes in a list of bitcode files, links them, performs link-time
+// optimization, and outputs an object file.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/StringSet.h"
+#include "llvm/CodeGen/CommandFlags.h"
+#include "llvm/LTO/LTOCodeGenerator.h"
+#include "llvm/LTO/LTOModule.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/TargetSelect.h"
+
+using namespace llvm;
+
+static cl::opt<bool>
+DisableOpt("disable-opt", cl::init(false),
+ cl::desc("Do not run any optimization passes"));
+
+static cl::opt<bool>
+DisableInline("disable-inlining", cl::init(false),
+ cl::desc("Do not run the inliner pass"));
+
+static cl::opt<bool>
+DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
+ cl::desc("Do not run the GVN load PRE pass"));
+
+static cl::list<std::string>
+InputFilenames(cl::Positional, cl::OneOrMore,
+ cl::desc("<input bitcode files>"));
+
+static cl::opt<std::string>
+OutputFilename("o", cl::init(""),
+ cl::desc("Override output filename"),
+ cl::value_desc("filename"));
+
+static cl::list<std::string>
+ExportedSymbols("exported-symbol",
+ cl::desc("Symbol to export from the resulting object file"),
+ cl::ZeroOrMore);
+
+static cl::list<std::string>
+DSOSymbols("dso-symbol",
+ cl::desc("Symbol to put in the symtab in the resulting dso"),
+ cl::ZeroOrMore);
+
+namespace {
+struct ModuleInfo {
+ std::vector<bool> CanBeHidden;
+};
+}
+
+int main(int argc, char **argv) {
+ // Print a stack trace if we signal out.
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, "llvm LTO linker\n");
+
+ // Initialize the configured targets.
+ InitializeAllTargets();
+ InitializeAllTargetMCs();
+ InitializeAllAsmPrinters();
+ InitializeAllAsmParsers();
+
+ // set up the TargetOptions for the machine
+ TargetOptions Options;
+ Options.LessPreciseFPMADOption = EnableFPMAD;
+ Options.NoFramePointerElim = DisableFPElim;
+ Options.AllowFPOpFusion = FuseFPOps;
+ Options.UnsafeFPMath = EnableUnsafeFPMath;
+ Options.NoInfsFPMath = EnableNoInfsFPMath;
+ Options.NoNaNsFPMath = EnableNoNaNsFPMath;
+ Options.HonorSignDependentRoundingFPMathOption =
+ EnableHonorSignDependentRoundingFPMath;
+ Options.UseSoftFloat = GenerateSoftFloatCalls;
+ if (FloatABIForCalls != FloatABI::Default)
+ Options.FloatABIType = FloatABIForCalls;
+ Options.NoZerosInBSS = DontPlaceZerosInBSS;
+ Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
+ Options.DisableTailCalls = DisableTailCalls;
+ Options.StackAlignmentOverride = OverrideStackAlignment;
+ Options.TrapFuncName = TrapFuncName;
+ Options.PositionIndependentExecutable = EnablePIE;
+ Options.EnableSegmentedStacks = SegmentedStacks;
+ Options.UseInitArray = UseInitArray;
+
+ unsigned BaseArg = 0;
+
+ LTOCodeGenerator CodeGen;
+
+ CodeGen.setCodePICModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC);
+ CodeGen.setDebugInfo(LTO_DEBUG_MODEL_DWARF);
+ CodeGen.setTargetOptions(Options);
+
+ llvm::StringSet<llvm::MallocAllocator> DSOSymbolsSet;
+ for (unsigned i = 0; i < DSOSymbols.size(); ++i)
+ DSOSymbolsSet.insert(DSOSymbols[i]);
+
+ std::vector<std::string> KeptDSOSyms;
+
+ for (unsigned i = BaseArg; i < InputFilenames.size(); ++i) {
+ std::string error;
+ OwningPtr<LTOModule> Module(LTOModule::makeLTOModule(InputFilenames[i].c_str(),
+ Options, error));
+ if (!error.empty()) {
+ errs() << argv[0] << ": error loading file '" << InputFilenames[i]
+ << "': " << error << "\n";
+ return 1;
+ }
+
+
+ if (!CodeGen.addModule(Module.get(), error)) {
+ errs() << argv[0] << ": error adding file '" << InputFilenames[i]
+ << "': " << error << "\n";
+ return 1;
+ }
+
+ unsigned NumSyms = Module->getSymbolCount();
+ for (unsigned I = 0; I < NumSyms; ++I) {
+ StringRef Name = Module->getSymbolName(I);
+ if (!DSOSymbolsSet.count(Name))
+ continue;
+ lto_symbol_attributes Attrs = Module->getSymbolAttributes(I);
+ unsigned Scope = Attrs & LTO_SYMBOL_SCOPE_MASK;
+ if (Scope != LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN)
+ KeptDSOSyms.push_back(Name);
+ }
+ }
+
+ // Add all the exported symbols to the table of symbols to preserve.
+ for (unsigned i = 0; i < ExportedSymbols.size(); ++i)
+ CodeGen.addMustPreserveSymbol(ExportedSymbols[i].c_str());
+
+ // Add all the dso symbols to the table of symbols to expose.
+ for (unsigned i = 0; i < KeptDSOSyms.size(); ++i)
+ CodeGen.addMustPreserveSymbol(KeptDSOSyms[i].c_str());
+
+ if (!OutputFilename.empty()) {
+ size_t len = 0;
+ std::string ErrorInfo;
+ const void *Code = CodeGen.compile(&len, DisableOpt, DisableInline,
+ DisableGVNLoadPRE, ErrorInfo);
+ if (Code == NULL) {
+ errs() << argv[0]
+ << ": error compiling the code: " << ErrorInfo << "\n";
+ return 1;
+ }
+
+ raw_fd_ostream FileStream(OutputFilename.c_str(), ErrorInfo,
+ sys::fs::F_Binary);
+ if (!ErrorInfo.empty()) {
+ errs() << argv[0] << ": error opening the file '" << OutputFilename
+ << "': " << ErrorInfo << "\n";
+ return 1;
+ }
+
+ FileStream.write(reinterpret_cast<const char *>(Code), len);
+ } else {
+ std::string ErrorInfo;
+ const char *OutputName = NULL;
+ if (!CodeGen.compile_to_file(&OutputName, DisableOpt, DisableInline,
+ DisableGVNLoadPRE, ErrorInfo)) {
+ errs() << argv[0]
+ << ": error compiling the code: " << ErrorInfo
+ << "\n";
+ return 1;
+ }
+
+ outs() << "Wrote native object file '" << OutputName << "'\n";
+ }
+
+ return 0;
+}
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