1 /* 2 * Copyright (C) 2011 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 "base/logging.h" 18 #include "base/stringprintf.h" 19 #include "compiler_ir.h" 20 #include "dex/dataflow_iterator-inl.h" 21 #include "dex_flags.h" 22 #include "driver/dex_compilation_unit.h" 23 24 namespace art { 25 26 static const char* storage_name[] = {" Frame ", "PhysReg", " CompilerTemp "}; 27 28 void MIRGraph::DumpRegLocTable(RegLocation* table, int count) { 29 for (int i = 0; i < count; i++) { 30 LOG(INFO) << StringPrintf("Loc[%02d] : %s, %c %c %c %c %c %c 0x%04x S%d", 31 table[i].orig_sreg, storage_name[table[i].location], 32 table[i].wide ? 'W' : 'N', table[i].defined ? 'D' : 'U', 33 table[i].fp ? 'F' : table[i].ref ? 'R' :'C', 34 table[i].is_const ? 'c' : 'n', 35 table[i].high_word ? 'H' : 'L', table[i].home ? 'h' : 't', 36 table[i].reg.GetRawBits(), 37 table[i].s_reg_low); 38 } 39 } 40 41 // FIXME - will likely need to revisit all uses of this. 42 static const RegLocation fresh_loc = {kLocDalvikFrame, 0, 0, 0, 0, 0, 0, 0, 0, 43 RegStorage(), INVALID_SREG, INVALID_SREG}; 44 45 void MIRGraph::InitRegLocations() { 46 // Allocate the location map. We also include the maximum possible temps because 47 // the temp allocation initializes reg location as well (in order to deal with 48 // case when it will be called after this pass). 49 int max_regs = GetNumSSARegs() + GetMaxPossibleCompilerTemps(); 50 RegLocation* loc = arena_->AllocArray<RegLocation>(max_regs, kArenaAllocRegAlloc); 51 for (int i = 0; i < GetNumSSARegs(); i++) { 52 loc[i] = fresh_loc; 53 loc[i].s_reg_low = i; 54 loc[i].is_const = false; // Constants will be marked by constant propagation pass later. 55 } 56 57 /* Mark the location of ArtMethod* as temporary */ 58 loc[GetMethodSReg()].location = kLocCompilerTemp; 59 60 reg_location_ = loc; 61 } 62 63 /* 64 * Set the s_reg_low field to refer to the pre-SSA name of the 65 * base Dalvik virtual register. Once we add a better register 66 * allocator, remove this remapping. 67 */ 68 void MIRGraph::RemapRegLocations() { 69 for (int i = 0; i < GetNumSSARegs(); i++) { 70 int orig_sreg = reg_location_[i].s_reg_low; 71 reg_location_[i].orig_sreg = orig_sreg; 72 reg_location_[i].s_reg_low = SRegToVReg(orig_sreg); 73 } 74 } 75 76 } // namespace art 77
