Shih-wei Liao | e94d9b2 | 2012-05-22 09:01:24 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 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 "target_lir_emitter.h" |
| 18 | |
| 19 | #include "target_lir_info.h" |
| 20 | #include "target_lir_opcodes.h" |
| 21 | |
| 22 | #include "intrinsic_helper.h" |
| 23 | #include "lir_function.h" |
| 24 | |
| 25 | #include <llvm/Function.h> |
| 26 | |
| 27 | namespace art { |
| 28 | namespace greenland { |
| 29 | |
| 30 | TargetLIREmitter::TargetLIREmitter(const llvm::Function& func, |
| 31 | const OatCompilationUnit& cunit, |
| 32 | DexLang::Context& dex_lang_ctx, |
| 33 | TargetLIRInfo& target_lir_info) |
| 34 | : func_(func), cunit_(cunit), dex_lang_ctx_(dex_lang_ctx.IncRef()), |
| 35 | info_(target_lir_info), lir_func_() { |
| 36 | return; |
| 37 | } |
| 38 | |
| 39 | TargetLIREmitter::~TargetLIREmitter() { |
| 40 | dex_lang_ctx_.DecRef(); |
| 41 | return; |
| 42 | } |
| 43 | |
| 44 | bool TargetLIREmitter::visitBasicBlock(const llvm::BasicBlock& bb) { |
| 45 | // Place the corresponding block label to the output |
| 46 | llvm::DenseMap<const llvm::BasicBlock*, LIR*>::const_iterator label_iter = |
| 47 | block_labels_.find(&bb); |
| 48 | |
| 49 | DCHECK(label_iter != block_labels_.end()); |
| 50 | lir_func_.push_back(label_iter->second); |
| 51 | |
| 52 | // Now, iterate over and process all instructions within the basic block |
| 53 | for (llvm::BasicBlock::const_iterator inst_iter = bb.begin(), |
| 54 | inst_end = bb.end(); inst_iter != inst_end; inst_iter++) { |
| 55 | const llvm::Instruction& inst = *inst_iter; |
| 56 | switch (inst.getOpcode()) { |
| 57 | #define VISIT(OPCODE, CLASS) \ |
| 58 | case llvm::Instruction::OPCODE: { \ |
| 59 | if (!visit ## CLASS(static_cast<const llvm::CLASS&>(inst))) { \ |
| 60 | return false; \ |
| 61 | } \ |
| 62 | break; \ |
| 63 | } |
| 64 | |
| 65 | VISIT(Ret, ReturnInst); |
| 66 | VISIT(Br, BranchInst); |
| 67 | VISIT(ICmp, ICmpInst); |
| 68 | VISIT(IntToPtr, IntToPtrInst); |
| 69 | VISIT(Call, CallInst); |
| 70 | |
| 71 | #undef VISIT |
| 72 | default : { |
| 73 | LOG(INFO) << "Unhandled instruction hit!"; |
| 74 | inst.dump(); |
| 75 | return false; |
| 76 | } |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | return true; |
| 81 | } |
| 82 | |
| 83 | bool TargetLIREmitter::visitReturnInst(const llvm::ReturnInst& inst) { |
| 84 | inst.dump(); |
| 85 | return true; |
| 86 | } |
| 87 | |
| 88 | bool TargetLIREmitter::visitBranchInst(const llvm::BranchInst& inst) { |
| 89 | inst.dump(); |
| 90 | return true; |
| 91 | } |
| 92 | |
| 93 | bool TargetLIREmitter::visitICmpInst(const llvm::ICmpInst& inst) { |
| 94 | inst.dump(); |
| 95 | return true; |
| 96 | } |
| 97 | |
| 98 | bool TargetLIREmitter::visitIntToPtrInst(const llvm::IntToPtrInst& inst) { |
| 99 | inst.dump(); |
| 100 | return true; |
| 101 | } |
| 102 | |
| 103 | bool TargetLIREmitter::visitCallInst(const llvm::CallInst& inst) { |
| 104 | // The callee must be a DexLang intrinsic |
| 105 | return visitDexLangIntrinsics(inst); |
| 106 | } |
| 107 | |
| 108 | bool TargetLIREmitter::visitDexLangIntrinsics(const llvm::CallInst& inst) { |
| 109 | const llvm::Function* callee = inst.getCalledFunction(); |
| 110 | IntrinsicHelper::IntrinsicId intr_id = |
| 111 | dex_lang_ctx_.GetIntrinsicHelper().GetIntrinsicId(callee); |
| 112 | |
| 113 | if (intr_id == IntrinsicHelper::UnknownId) { |
| 114 | LOG(INFO) << "Unexpected call instruction to '" |
| 115 | << callee->getName().str() << "'"; |
| 116 | return false; |
| 117 | } |
| 118 | |
| 119 | //const IntrinsicHelper::IntrinsicInfo& intr_info = |
| 120 | // IntrinsicHelper::GetInfo(intr_id); |
| 121 | |
| 122 | |
| 123 | return true; |
| 124 | } |
| 125 | |
| 126 | LIRFunction* TargetLIREmitter::Emit() { |
| 127 | if (EmitBasicBlockLabels() && |
| 128 | EmitEntrySequence() && |
| 129 | EmitInstructions() && |
| 130 | EmitExitSequence()) { |
| 131 | return &lir_func_; |
| 132 | } |
| 133 | |
| 134 | return NULL; |
| 135 | } |
| 136 | |
| 137 | bool TargetLIREmitter::EmitBasicBlockLabels() { |
| 138 | for (llvm::Function::const_iterator bb_iter = func_.begin(), |
| 139 | bb_end = func_.end(); bb_iter != bb_end; bb_iter++) { |
| 140 | LIR* lir = lir_func_.CreateLIR(info_.GetLIRDesc(opcode::kBlockLabel)); |
| 141 | CHECK(block_labels_.insert(std::make_pair(bb_iter, lir)).second); |
| 142 | } |
| 143 | return true; |
| 144 | } |
| 145 | |
| 146 | bool TargetLIREmitter::EmitEntrySequence() { |
| 147 | // Flush all function arguments to the virtual registers |
| 148 | return true; |
| 149 | } |
| 150 | |
| 151 | bool TargetLIREmitter::EmitInstructions() { |
| 152 | // Iterator over all basic blocks |
| 153 | for (llvm::Function::const_iterator bb_iter = func_.begin(), |
| 154 | bb_end = func_.end(); bb_iter != bb_end; bb_iter++) { |
| 155 | if (!visitBasicBlock(*bb_iter)) { |
| 156 | return false; |
| 157 | } |
| 158 | } |
| 159 | return true; |
| 160 | } |
| 161 | |
| 162 | bool TargetLIREmitter::EmitExitSequence() { |
| 163 | return true; |
| 164 | } |
| 165 | |
| 166 | } // namespace greenland |
| 167 | } // namespace art |