vendor/llvm/llvm-release_39-r276489

1 files changed, 144 insertions, 12 deletions

diff --git a/tools/lto/lto.cpp b/tools/lto/lto.cpp
index d8f99c050a34c..7109cf4d90970 100644
--- a/tools/lto/lto.cpp
+++ b/tools/lto/lto.cpp
@@ -14,15 +14,18 @@
 
 #include "llvm-c/lto.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/CodeGen/CommandFlags.h"
 #include "llvm/IR/DiagnosticInfo.h"
 #include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/LLVMContext.h"
-#include "llvm/LTO/LTOCodeGenerator.h"
-#include "llvm/LTO/LTOModule.h"
+#include "llvm/LTO/legacy/LTOCodeGenerator.h"
+#include "llvm/LTO/legacy/LTOModule.h"
+#include "llvm/LTO/legacy/ThinLTOCodeGenerator.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/raw_ostream.h"
 
 // extra command-line flags needed for LTOCodeGenerator
 static cl::opt<char>
@@ -81,7 +84,6 @@ static void diagnosticHandler(const DiagnosticInfo &DI, void *Context) {
     DiagnosticPrinterRawOStream DP(Stream);
     DI.print(DP);
   }
-  sLastErrorString += '\n';
 }
 
 // Initialize the configured targets if they have not been initialized.
@@ -100,7 +102,8 @@ static void lto_initialize() {
     InitializeAllAsmPrinters();
     InitializeAllDisassemblers();
 
-    LTOContext = &getGlobalContext();
+    static LLVMContext Context;
+    LTOContext = &Context;
     LTOContext->setDiagnosticHandler(diagnosticHandler, nullptr, true);
     initialized = true;
   }
@@ -111,23 +114,24 @@ namespace {
 static void handleLibLTODiagnostic(lto_codegen_diagnostic_severity_t Severity,
                                    const char *Msg, void *) {
   sLastErrorString = Msg;
-  sLastErrorString += "\n";
 }
 
 // This derived class owns the native object file. This helps implement the
 // libLTO API semantics, which require that the code generator owns the object
 // file.
 struct LibLTOCodeGenerator : LTOCodeGenerator {
-  LibLTOCodeGenerator() : LTOCodeGenerator(*LTOContext) {
-    setDiagnosticHandler(handleLibLTODiagnostic, nullptr); }
+  LibLTOCodeGenerator() : LTOCodeGenerator(*LTOContext) { init(); }
   LibLTOCodeGenerator(std::unique_ptr<LLVMContext> Context)
       : LTOCodeGenerator(*Context), OwnedContext(std::move(Context)) {
-    setDiagnosticHandler(handleLibLTODiagnostic, nullptr); }
+    init();
+  }
 
   // Reset the module first in case MergedModule is created in OwnedContext.
   // Module must be destructed before its context gets destructed.
   ~LibLTOCodeGenerator() { resetMergedModule(); }
 
+  void init() { setDiagnosticHandler(handleLibLTODiagnostic, nullptr); }
+
   std::unique_ptr<MemoryBuffer> NativeObjectFile;
   std::unique_ptr<LLVMContext> OwnedContext;
 };
@@ -135,6 +139,7 @@ struct LibLTOCodeGenerator : LTOCodeGenerator {
 }
 
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LibLTOCodeGenerator, lto_code_gen_t)
+DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ThinLTOCodeGenerator, thinlto_code_gen_t)
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LTOModule, lto_module_t)
 
 // Convert the subtarget features into a string to pass to LTOCodeGenerator.
@@ -176,6 +181,14 @@ bool lto_module_is_object_file_for_target(const char* path,
   return LTOModule::isBitcodeForTarget(Buffer->get(), target_triplet_prefix);
 }
 
+bool lto_module_has_objc_category(const void *mem, size_t length) {
+  std::unique_ptr<MemoryBuffer> Buffer(LTOModule::makeBuffer(mem, length));
+  if (!Buffer)
+    return false;
+  LLVMContext Ctx;
+  return llvm::isBitcodeContainingObjCCategory(*Buffer, Ctx);
+}
+
 bool lto_module_is_object_file_in_memory(const void* mem, size_t length) {
   return LTOModule::isBitcodeFile(mem, length);
 }
@@ -249,8 +262,14 @@ lto_module_t lto_module_create_in_local_context(const void *mem, size_t length,
                                                 const char *path) {
   lto_initialize();
   llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+
+  // Create a local context. Ownership will be transfered to LTOModule.
+  std::unique_ptr<LLVMContext> Context = llvm::make_unique<LLVMContext>();
+  Context->setDiagnosticHandler(diagnosticHandler, nullptr, true);
+
   ErrorOr<std::unique_ptr<LTOModule>> M =
-      LTOModule::createInLocalContext(mem, length, Options, path);
+      LTOModule::createInLocalContext(std::move(Context), mem, length, Options,
+                                      path);
   if (!M)
     return nullptr;
   return wrap(M->release());
@@ -262,8 +281,8 @@ lto_module_t lto_module_create_in_codegen_context(const void *mem,
                                                   lto_code_gen_t cg) {
   lto_initialize();
   llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
-  ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createInContext(
-      mem, length, Options, path, &unwrap(cg)->getContext());
+  ErrorOr<std::unique_ptr<LTOModule>> M = LTOModule::createFromBuffer(
+      unwrap(cg)->getContext(), mem, length, Options, path);
   return wrap(M->release());
 }
 
@@ -347,7 +366,7 @@ bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model) {
     unwrap(cg)->setCodePICModel(Reloc::DynamicNoPIC);
     return false;
   case LTO_CODEGEN_PIC_MODEL_DEFAULT:
-    unwrap(cg)->setCodePICModel(Reloc::Default);
+    unwrap(cg)->setCodePICModel(None);
     return false;
   }
   sLastErrorString = "Unknown PIC model";
@@ -435,3 +454,116 @@ void lto_codegen_set_should_embed_uselists(lto_code_gen_t cg,
                                            lto_bool_t ShouldEmbedUselists) {
   unwrap(cg)->setShouldEmbedUselists(ShouldEmbedUselists);
 }
+
+// ThinLTO API below
+
+thinlto_code_gen_t thinlto_create_codegen(void) {
+  lto_initialize();
+  ThinLTOCodeGenerator *CodeGen = new ThinLTOCodeGenerator();
+  CodeGen->setTargetOptions(InitTargetOptionsFromCodeGenFlags());
+
+  return wrap(CodeGen);
+}
+
+void thinlto_codegen_dispose(thinlto_code_gen_t cg) { delete unwrap(cg); }
+
+void thinlto_codegen_add_module(thinlto_code_gen_t cg, const char *Identifier,
+                                const char *Data, int Length) {
+  unwrap(cg)->addModule(Identifier, StringRef(Data, Length));
+}
+
+void thinlto_codegen_process(thinlto_code_gen_t cg) { unwrap(cg)->run(); }
+
+unsigned int thinlto_module_get_num_objects(thinlto_code_gen_t cg) {
+  return unwrap(cg)->getProducedBinaries().size();
+}
+LTOObjectBuffer thinlto_module_get_object(thinlto_code_gen_t cg,
+                                          unsigned int index) {
+  assert(index < unwrap(cg)->getProducedBinaries().size() && "Index overflow");
+  auto &MemBuffer = unwrap(cg)->getProducedBinaries()[index];
+  return LTOObjectBuffer{MemBuffer->getBufferStart(),
+                         MemBuffer->getBufferSize()};
+}
+
+void thinlto_codegen_disable_codegen(thinlto_code_gen_t cg,
+                                     lto_bool_t disable) {
+  unwrap(cg)->disableCodeGen(disable);
+}
+
+void thinlto_codegen_set_codegen_only(thinlto_code_gen_t cg,
+                                      lto_bool_t CodeGenOnly) {
+  unwrap(cg)->setCodeGenOnly(CodeGenOnly);
+}
+
+void thinlto_debug_options(const char *const *options, int number) {
+  // if options were requested, set them
+  if (number && options) {
+    std::vector<const char *> CodegenArgv(1, "libLTO");
+    for (auto Arg : ArrayRef<const char *>(options, number))
+      CodegenArgv.push_back(Arg);
+    cl::ParseCommandLineOptions(CodegenArgv.size(), CodegenArgv.data());
+  }
+}
+
+lto_bool_t lto_module_is_thinlto(lto_module_t mod) {
+  return unwrap(mod)->isThinLTO();
+}
+
+void thinlto_codegen_add_must_preserve_symbol(thinlto_code_gen_t cg,
+                                              const char *Name, int Length) {
+  unwrap(cg)->preserveSymbol(StringRef(Name, Length));
+}
+
+void thinlto_codegen_add_cross_referenced_symbol(thinlto_code_gen_t cg,
+                                                 const char *Name, int Length) {
+  unwrap(cg)->crossReferenceSymbol(StringRef(Name, Length));
+}
+
+void thinlto_codegen_set_cpu(thinlto_code_gen_t cg, const char *cpu) {
+  return unwrap(cg)->setCpu(cpu);
+}
+
+void thinlto_codegen_set_cache_dir(thinlto_code_gen_t cg,
+                                   const char *cache_dir) {
+  return unwrap(cg)->setCacheDir(cache_dir);
+}
+
+void thinlto_codegen_set_cache_pruning_interval(thinlto_code_gen_t cg,
+                                                int interval) {
+  return unwrap(cg)->setCachePruningInterval(interval);
+}
+
+void thinlto_codegen_set_cache_entry_expiration(thinlto_code_gen_t cg,
+                                                unsigned expiration) {
+  return unwrap(cg)->setCacheEntryExpiration(expiration);
+}
+
+void thinlto_codegen_set_final_cache_size_relative_to_available_space(
+    thinlto_code_gen_t cg, unsigned Percentage) {
+  return unwrap(cg)->setMaxCacheSizeRelativeToAvailableSpace(Percentage);
+}
+
+void thinlto_codegen_set_savetemps_dir(thinlto_code_gen_t cg,
+                                       const char *save_temps_dir) {
+  return unwrap(cg)->setSaveTempsDir(save_temps_dir);
+}
+
+lto_bool_t thinlto_codegen_set_pic_model(thinlto_code_gen_t cg,
+                                         lto_codegen_model model) {
+  switch (model) {
+  case LTO_CODEGEN_PIC_MODEL_STATIC:
+    unwrap(cg)->setCodePICModel(Reloc::Static);
+    return false;
+  case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+    unwrap(cg)->setCodePICModel(Reloc::PIC_);
+    return false;
+  case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+    unwrap(cg)->setCodePICModel(Reloc::DynamicNoPIC);
+    return false;
+  case LTO_CODEGEN_PIC_MODEL_DEFAULT:
+    unwrap(cg)->setCodePICModel(None);
+    return false;
+  }
+  sLastErrorString = "Unknown PIC model";
+  return true;
+}