Dragos Sbirlea | 90af14d | 2013-08-15 17:50:16 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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 <string> |
| 18 | #include <llvm/PassManager.h> |
| 19 | #include <llvm/Support/TargetRegistry.h> |
| 20 | #include <llvm/Support/FormattedStream.h> |
| 21 | #include <llvm/Target/TargetMachine.h> |
| 22 | #include <llvm/Transforms/IPO.h> |
| 23 | #include <llvm/Transforms/IPO/PassManagerBuilder.h> |
| 24 | |
| 25 | #include "base/logging.h" |
| 26 | #include "driver/compiler_driver.h" |
| 27 | #include "sea_ir/ir/sea.h" |
| 28 | #include "sea_ir/code_gen/code_gen.h" |
| 29 | |
| 30 | |
| 31 | namespace sea_ir { |
| 32 | std::string CodeGenData::GetElf(art::InstructionSet instruction_set) { |
| 33 | std::string elf; |
| 34 | ::llvm::raw_string_ostream out_stream(elf); |
| 35 | // Lookup the LLVM target |
| 36 | std::string target_triple; |
| 37 | std::string target_cpu; |
| 38 | std::string target_attr; |
| 39 | art::CompilerDriver::InstructionSetToLLVMTarget(instruction_set, |
| 40 | target_triple, target_cpu, target_attr); |
| 41 | |
| 42 | std::string errmsg; |
| 43 | const ::llvm::Target* target = |
| 44 | ::llvm::TargetRegistry::lookupTarget(target_triple, errmsg); |
| 45 | |
| 46 | CHECK(target != NULL) << errmsg; |
| 47 | |
| 48 | // Target options |
| 49 | ::llvm::TargetOptions target_options; |
| 50 | target_options.FloatABIType = ::llvm::FloatABI::Soft; |
| 51 | target_options.NoFramePointerElim = true; |
| 52 | target_options.NoFramePointerElimNonLeaf = true; |
| 53 | target_options.UseSoftFloat = false; |
| 54 | target_options.EnableFastISel = false; |
| 55 | |
| 56 | // Create the ::llvm::TargetMachine |
| 57 | ::llvm::OwningPtr< ::llvm::TargetMachine> target_machine( |
| 58 | target->createTargetMachine(target_triple, target_cpu, target_attr, target_options, |
| 59 | ::llvm::Reloc::Static, ::llvm::CodeModel::Small, |
| 60 | ::llvm::CodeGenOpt::Aggressive)); |
| 61 | |
| 62 | CHECK(target_machine.get() != NULL) << "Failed to create target machine"; |
| 63 | |
| 64 | // Add target data |
| 65 | const ::llvm::DataLayout* data_layout = target_machine->getDataLayout(); |
| 66 | |
| 67 | // PassManager for code generation passes |
| 68 | ::llvm::PassManager pm; |
| 69 | pm.add(new ::llvm::DataLayout(*data_layout)); |
| 70 | |
| 71 | // FunctionPassManager for optimization pass |
| 72 | ::llvm::FunctionPassManager fpm(&module_); |
| 73 | fpm.add(new ::llvm::DataLayout(*data_layout)); |
| 74 | |
| 75 | // Add optimization pass |
| 76 | ::llvm::PassManagerBuilder pm_builder; |
| 77 | // TODO: Use inliner after we can do IPO. |
| 78 | pm_builder.Inliner = NULL; |
| 79 | // pm_builder.Inliner = ::llvm::createFunctionInliningPass(); |
| 80 | // pm_builder.Inliner = ::llvm::createAlwaysInlinerPass(); |
| 81 | // pm_builder.Inliner = ::llvm::createPartialInliningPass(); |
| 82 | pm_builder.OptLevel = 3; |
| 83 | pm_builder.DisableSimplifyLibCalls = 1; |
| 84 | pm_builder.DisableUnitAtATime = 1; |
| 85 | pm_builder.populateFunctionPassManager(fpm); |
| 86 | pm_builder.populateModulePassManager(pm); |
| 87 | pm.add(::llvm::createStripDeadPrototypesPass()); |
| 88 | // Add passes to emit ELF image |
| 89 | { |
| 90 | ::llvm::formatted_raw_ostream formatted_os(out_stream, false); |
| 91 | // Ask the target to add backend passes as necessary. |
| 92 | if (target_machine->addPassesToEmitFile(pm, |
| 93 | formatted_os, |
| 94 | ::llvm::TargetMachine::CGFT_ObjectFile, |
| 95 | true)) { |
| 96 | LOG(FATAL) << "Unable to generate ELF for this target"; |
| 97 | } |
| 98 | |
| 99 | // Run the code generation passes |
| 100 | pm.run(module_); |
| 101 | } |
| 102 | return elf; |
| 103 | } |
Ian Rogers | 8ef94c6 | 2013-08-16 16:22:36 -0700 | [diff] [blame] | 104 | } // namespace sea_ir |