//
// This file declares the LTOCodeGenerator class.
//
-// LTO compilation consists of three phases: Pre-IPO, IPO and Post-IPO.
+// LTO compilation consists of three phases: Pre-IPO, IPO and Post-IPO.
//
// The Pre-IPO phase compiles source code into bitcode file. The resulting
// bitcode files, along with object files and libraries, will be fed to the
// The IPO phase perform inter-procedural analyses and optimizations, and
// the Post-IPO consists two sub-phases: intra-procedural scalar optimizations
// (SOPT), and intra-procedural target-dependent code generator (CG).
-//
+//
// As of this writing, we don't separate IPO and the Post-IPO SOPT. They
// are intermingled together, and are driven by a single pass manager (see
// PassManagerBuilder::populateLTOPassManager()).
-//
-// The "LTOCodeGenerator" is the driver for the IPO and Post-IPO stages.
+//
+// The "LTOCodeGenerator" is the driver for the IPO and Post-IPO stages.
// The "CodeGenerator" here is bit confusing. Don't confuse the "CodeGenerator"
// with the machine specific code generator.
//
//===----------------------------------------------------------------------===//
-#ifndef LTO_CODE_GENERATOR_H
-#define LTO_CODE_GENERATOR_H
+#ifndef LLVM_LTO_LTOCODEGENERATOR_H
+#define LLVM_LTO_LTOCODEGENERATOR_H
#include "llvm-c/lto.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/StringMap.h"
-#include "llvm/Linker.h"
+#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <string>
#include <vector>
namespace llvm {
class LLVMContext;
+ class DiagnosticInfo;
class GlobalValue;
+ class Linker;
class Mangler;
class MemoryBuffer;
class TargetLibraryInfo;
class TargetMachine;
class raw_ostream;
-}
+ class raw_pwrite_stream;
//===----------------------------------------------------------------------===//
-/// LTOCodeGenerator - C++ class which implements the opaque lto_code_gen_t
-/// type.
+/// C++ class which implements the opaque lto_code_gen_t type.
///
struct LTOCodeGenerator {
static const char *getVersionString();
- LTOCodeGenerator();
+ LTOCodeGenerator(LLVMContext &Context);
~LTOCodeGenerator();
- // Merge given module, return true on success.
- bool addModule(struct LTOModule*, std::string &errMsg);
+ /// Merge given module. Return true on success.
+ bool addModule(struct LTOModule *);
- void setTargetOptions(llvm::TargetOptions options);
- void setDebugInfo(lto_debug_model);
- void setCodePICModel(lto_codegen_model);
+ /// Set the destination module.
+ void setModule(std::unique_ptr<LTOModule> M);
- void setCpu(const char *mCpu) { MCpu = mCpu; }
-
- void addMustPreserveSymbol(const char *sym) { MustPreserveSymbols[sym] = 1; }
-
- // To pass options to the driver and optimization passes. These options are
- // not necessarily for debugging purpose (The function name is misleading).
- // This function should be called before LTOCodeGenerator::compilexxx(),
- // and LTOCodeGenerator::writeMergedModules().
- //
- void setCodeGenDebugOptions(const char *opts);
+ void setTargetOptions(TargetOptions Options);
+ void setDebugInfo(lto_debug_model);
+ void setCodePICModel(Reloc::Model Model) { RelocModel = Model; }
- // Parse the options set in setCodeGenDebugOptions. Like
- // setCodeGenDebugOptions, this must be called before
- // LTOCodeGenerator::compilexxx() and LTOCodeGenerator::writeMergedModules()
+ /// Set the file type to be emitted (assembly or object code).
+ /// The default is TargetMachine::CGFT_ObjectFile.
+ void setFileType(TargetMachine::CodeGenFileType FT) { FileType = FT; }
+
+ void setCpu(const char *MCpu) { this->MCpu = MCpu; }
+ void setAttr(const char *MAttr) { this->MAttr = MAttr; }
+ void setOptLevel(unsigned OptLevel);
+
+ void setShouldInternalize(bool Value) { ShouldInternalize = Value; }
+ void setShouldEmbedUselists(bool Value) { ShouldEmbedUselists = Value; }
+
+ void addMustPreserveSymbol(StringRef Sym) { MustPreserveSymbols[Sym] = 1; }
+
+ /// Pass options to the driver and optimization passes.
+ ///
+ /// These options are not necessarily for debugging purpose (the function
+ /// name is misleading). This function should be called before
+ /// LTOCodeGenerator::compilexxx(), and
+ /// LTOCodeGenerator::writeMergedModules().
+ void setCodeGenDebugOptions(const char *Opts);
+
+ /// Parse the options set in setCodeGenDebugOptions.
+ ///
+ /// Like \a setCodeGenDebugOptions(), this must be called before
+ /// LTOCodeGenerator::compilexxx() and
+ /// LTOCodeGenerator::writeMergedModules().
void parseCodeGenDebugOptions();
- // Write the merged module to the file specified by the given path.
- // Return true on success.
- bool writeMergedModules(const char *path, std::string &errMsg);
-
- // Compile the merged module into a *single* object file; the path to object
- // file is returned to the caller via argument "name". Return true on
- // success.
- //
- // NOTE that it is up to the linker to remove the intermediate object file.
- // Do not try to remove the object file in LTOCodeGenerator's destructor
- // as we don't who (LTOCodeGenerator or the obj file) will last longer.
- //
- bool compile_to_file(const char **name,
- bool disableOpt,
- bool disableInline,
- bool disableGVNLoadPRE,
- std::string &errMsg);
-
- // As with compile_to_file(), this function compiles the merged module into
- // single object file. Instead of returning the object-file-path to the caller
- // (linker), it brings the object to a buffer, and return the buffer to the
- // caller. This function should delete intermediate object file once its content
- // is brought to memory. Return NULL if the compilation was not successful.
- //
- const void *compile(size_t *length,
- bool disableOpt,
- bool disableInline,
- bool disableGVNLoadPRE,
- std::string &errMsg);
+ /// Write the merged module to the file specified by the given path. Return
+ /// true on success.
+ bool writeMergedModules(const char *Path);
+
+ /// Compile the merged module into a *single* output file; the path to output
+ /// file is returned to the caller via argument "name". Return true on
+ /// success.
+ ///
+ /// \note It is up to the linker to remove the intermediate output file. Do
+ /// not try to remove the object file in LTOCodeGenerator's destructor as we
+ /// don't who (LTOCodeGenerator or the output file) will last longer.
+ bool compile_to_file(const char **Name, bool DisableVerify,
+ bool DisableInline, bool DisableGVNLoadPRE,
+ bool DisableVectorization);
+
+ /// As with compile_to_file(), this function compiles the merged module into
+ /// single output file. Instead of returning the output file path to the
+ /// caller (linker), it brings the output to a buffer, and returns the buffer
+ /// to the caller. This function should delete the intermediate file once
+ /// its content is brought to memory. Return NULL if the compilation was not
+ /// successful.
+ std::unique_ptr<MemoryBuffer> compile(bool DisableVerify, bool DisableInline,
+ bool DisableGVNLoadPRE,
+ bool DisableVectorization);
+
+ /// Optimizes the merged module. Returns true on success.
+ bool optimize(bool DisableVerify, bool DisableInline, bool DisableGVNLoadPRE,
+ bool DisableVectorization);
+
+ /// Compiles the merged optimized module into a single output file. It brings
+ /// the output to a buffer, and returns the buffer to the caller. Return NULL
+ /// if the compilation was not successful.
+ std::unique_ptr<MemoryBuffer> compileOptimized();
+
+ /// Compile the merged optimized module into out.size() output files each
+ /// representing a linkable partition of the module. If out contains more
+ /// than one element, code generation is done in parallel with out.size()
+ /// threads. Output files will be written to members of out. Returns true on
+ /// success.
+ bool compileOptimized(ArrayRef<raw_pwrite_stream *> Out);
+
+ void setDiagnosticHandler(lto_diagnostic_handler_t, void *);
+
+ LLVMContext &getContext() { return Context; }
+
+ void resetMergedModule() { MergedModule.reset(); }
private:
void initializeLTOPasses();
- bool generateObjectFile(llvm::raw_ostream &out,
- bool disableOpt,
- bool disableInline,
- bool disableGVNLoadPRE,
- std::string &errMsg);
+ bool compileOptimizedToFile(const char **Name);
void applyScopeRestrictions();
- void applyRestriction(llvm::GlobalValue &GV,
- const llvm::ArrayRef<llvm::StringRef> &Libcalls,
- std::vector<const char*> &MustPreserveList,
- llvm::SmallPtrSet<llvm::GlobalValue*, 8> &AsmUsed,
- llvm::Mangler &Mangler);
- bool determineTarget(std::string &errMsg);
-
- typedef llvm::StringMap<uint8_t> StringSet;
-
- llvm::LLVMContext &Context;
- llvm::Linker Linker;
- llvm::TargetMachine *TargetMach;
- bool EmitDwarfDebugInfo;
- bool ScopeRestrictionsDone;
- lto_codegen_model CodeModel;
+ void applyRestriction(GlobalValue &GV, ArrayRef<StringRef> Libcalls,
+ std::vector<const char *> &MustPreserveList,
+ SmallPtrSetImpl<GlobalValue *> &AsmUsed,
+ Mangler &Mangler);
+ bool determineTarget();
+
+ static void DiagnosticHandler(const DiagnosticInfo &DI, void *Context);
+
+ void DiagnosticHandler2(const DiagnosticInfo &DI);
+
+ void emitError(const std::string &ErrMsg);
+
+ typedef StringMap<uint8_t> StringSet;
+
+ LLVMContext &Context;
+ std::unique_ptr<Module> MergedModule;
+ std::unique_ptr<Linker> TheLinker;
+ std::unique_ptr<TargetMachine> TargetMach;
+ bool EmitDwarfDebugInfo = false;
+ bool ScopeRestrictionsDone = false;
+ Reloc::Model RelocModel = Reloc::Default;
StringSet MustPreserveSymbols;
StringSet AsmUndefinedRefs;
- llvm::MemoryBuffer *NativeObjectFile;
- std::vector<char *> CodegenOptions;
+ std::vector<std::string> CodegenOptions;
+ std::string FeatureStr;
std::string MCpu;
+ std::string MAttr;
std::string NativeObjectPath;
- llvm::TargetOptions Options;
+ TargetOptions Options;
+ CodeGenOpt::Level CGOptLevel = CodeGenOpt::Default;
+ unsigned OptLevel = 2;
+ lto_diagnostic_handler_t DiagHandler = nullptr;
+ void *DiagContext = nullptr;
+ bool ShouldInternalize = true;
+ bool ShouldEmbedUselists = false;
+ TargetMachine::CodeGenFileType FileType = TargetMachine::CGFT_ObjectFile;
};
-
-#endif // LTO_CODE_GENERATOR_H
+}
+#endif
projects / oota-llvm.git / blobdiff