1 /* 2 * Copyright 2012, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "bcc/Support/CompilerConfig.h" 18 19 #include <llvm/CodeGen/SchedulerRegistry.h> 20 #include <llvm/MC/SubtargetFeature.h> 21 #include <llvm/Support/TargetRegistry.h> 22 23 #include "bcc/Support/Log.h" 24 #include "bcc/Support/TargetCompilerConfigs.h" 25 26 using namespace bcc; 27 28 CompilerConfig::CompilerConfig(const std::string &pTriple) 29 : mTriple(pTriple), mTarget(NULL) { 30 //===--------------------------------------------------------------------===// 31 // Default setting of register sheduler 32 //===--------------------------------------------------------------------===// 33 llvm::RegisterScheduler::setDefault(llvm::createDefaultScheduler); 34 35 //===--------------------------------------------------------------------===// 36 // Default setting of target options 37 //===--------------------------------------------------------------------===// 38 // Use hardfloat ABI by default. 39 // 40 // TODO(all): Need to detect the CPU capability and decide whether to use 41 // softfp. To use softfp, change the following 2 lines to 42 // 43 // options.FloatABIType = llvm::FloatABI::Soft; 44 // options.UseSoftFloat = true; 45 mTargetOpts.FloatABIType = llvm::FloatABI::Soft; 46 mTargetOpts.UseSoftFloat = false; 47 48 // Enable frame pointer elimination optimization by default. 49 mTargetOpts.NoFramePointerElim = false; 50 51 //===--------------------------------------------------------------------===// 52 // Default setting for code model 53 //===--------------------------------------------------------------------===// 54 mCodeModel = llvm::CodeModel::Small; 55 56 //===--------------------------------------------------------------------===// 57 // Default setting for relocation model 58 //===--------------------------------------------------------------------===// 59 mRelocModel = llvm::Reloc::Default; 60 61 //===--------------------------------------------------------------------===// 62 // Default setting for optimization level (-O2) 63 //===--------------------------------------------------------------------===// 64 mOptLevel = llvm::CodeGenOpt::Default; 65 66 //===--------------------------------------------------------------------===// 67 // Default setting for architecture type 68 //===--------------------------------------------------------------------===// 69 mArchType = llvm::Triple::UnknownArch; 70 71 initializeTarget(); 72 initializeArch(); 73 74 return; 75 } 76 77 bool CompilerConfig::initializeTarget() { 78 std::string error; 79 mTarget = llvm::TargetRegistry::lookupTarget(mTriple, error); 80 if (mTarget != NULL) { 81 return true; 82 } else { 83 ALOGE("Cannot initialize llvm::Target for given triple '%s'! (%s)", 84 mTriple.c_str(), error.c_str()); 85 return false; 86 } 87 } 88 89 void CompilerConfig::initializeArch() { 90 if (mTarget != NULL) { 91 mArchType = llvm::Triple::getArchTypeForLLVMName(mTarget->getName()); 92 } else { 93 mArchType = llvm::Triple::UnknownArch; 94 } 95 return; 96 } 97 98 void CompilerConfig::setFeatureString(const std::vector<std::string> &pAttrs) { 99 llvm::SubtargetFeatures f; 100 101 for (std::vector<std::string>::const_iterator attr_iter = pAttrs.begin(), 102 attr_end = pAttrs.end(); 103 attr_iter != attr_end; attr_iter++) { 104 f.AddFeature(*attr_iter); 105 } 106 107 mFeatureString = f.getString(); 108 return; 109 } 110
