Make it possible to set the target triple and expose that with an option in the

gold plugin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110604 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm-c/lto.h

@@ -135,6 +135,12 @@ lto_module_dispose(lto_module_t mod);
 extern const char*
 lto_module_get_target_triple(lto_module_t mod);
 
+/**
+ * Sets triple string with which the object will be codegened.
+ */
+extern void
+lto_module_set_target_triple(lto_module_t mod, const char *triple);
+
 
 /**
  * Returns the number of symbols in the object module.

tools/gold/gold-plugin.cpp

@@ -68,6 +68,7 @@ namespace options {
   static std::string as_path;
   static std::vector<std::string> pass_through;
   static std::string extra_library_path;
+  static std::string triple;
   // Additional options to pass into the code generator.
   // Note: This array will contain all plugin options which are not claimed
   // as plugin exclusive to pass to the code generator.
@@ -95,6 +96,8 @@ namespace options {
     } else if (opt.startswith("pass-through=")) {
       llvm::StringRef item = opt.substr(strlen("pass-through="));
       pass_through.push_back(item.str());
+    } else if (opt == "mtriple=") {
+      triple = opt.substr(strlen("mtriple="));
     } else if (opt == "emit-llvm") {
       generate_bc_file = BC_ONLY;
     } else if (opt == "also-emit-llvm") {
@@ -270,6 +273,10 @@ static ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
                lto_get_error_message());
     return LDPS_ERR;
   }
+
+  if (!options::triple.empty())
+    lto_module_set_target_triple(cf.M, options::triple.c_str());
+
   cf.handle = file->handle;
   unsigned sym_count = lto_module_get_num_symbols(cf.M);
   cf.syms.reserve(sym_count);

tools/lto/LTOModule.cpp

@@ -153,6 +153,11 @@ const char* LTOModule::getTargetTriple()
     return _module->getTargetTriple().c_str();
 }
 
+void LTOModule::setTargetTriple(const char *triple)
+{
+    _module->setTargetTriple(triple);
+}
+
 void LTOModule::addDefinedFunctionSymbol(Function* f, Mangler &mangler)
 {
     // add to list of defined symbols

tools/lto/LTOModule.h

@@ -55,6 +55,7 @@ struct LTOModule {
                                            std::string& errMsg);
 
     const char*              getTargetTriple();
+    void                     setTargetTriple(const char*);
     uint32_t                 getSymbolCount();
     lto_symbol_attributes    getSymbolAttributes(uint32_t index);
     const char*              getSymbolName(uint32_t index);

tools/lto/lto.cpp

@@ -120,6 +120,14 @@ const char* lto_module_get_target_triple(lto_module_t mod)
     return mod->getTargetTriple();
 }
 
+//
+// sets triple string with which the object will be codegened.
+//
+void lto_module_set_target_triple(lto_module_t mod, const char *triple)
+{
+    return mod->setTargetTriple(triple);
+}
+
 
 //
 // returns the number of symbols in the object module

tools/lto/lto.exports

@@ -6,6 +6,7 @@ lto_module_get_num_symbols
 lto_module_get_symbol_attribute
 lto_module_get_symbol_name
 lto_module_get_target_triple
+lto_module_set_target_triple
 lto_module_is_object_file
 lto_module_is_object_file_for_target
 lto_module_is_object_file_in_memory