Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 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 | /* This file contains register alloction support. */ |
| 18 | |
| 19 | #include "dex/compiler_ir.h" |
| 20 | #include "dex/compiler_internals.h" |
| 21 | #include "mir_to_lir-inl.h" |
| 22 | |
| 23 | namespace art { |
| 24 | |
| 25 | /* |
| 26 | * Free all allocated temps in the temp pools. Note that this does |
| 27 | * not affect the "liveness" of a temp register, which will stay |
| 28 | * live until it is either explicitly killed or reallocated. |
| 29 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 30 | void Mir2Lir::ResetRegPool() { |
buzbee | bd663de | 2013-09-10 15:41:31 -0700 | [diff] [blame] | 31 | GrowableArray<RegisterInfo*>::Iterator iter(&tempreg_info_); |
| 32 | for (RegisterInfo* info = iter.Next(); info != NULL; info = iter.Next()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 33 | info->MarkFree(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 34 | } |
| 35 | // Reset temp tracking sanity check. |
| 36 | if (kIsDebugBuild) { |
| 37 | live_sreg_ = INVALID_SREG; |
| 38 | } |
| 39 | } |
| 40 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 41 | Mir2Lir::RegisterInfo::RegisterInfo(RegStorage r, uint64_t mask) |
| 42 | : reg_(r), is_temp_(false), wide_value_(false), live_(false), |
| 43 | dirty_(false), partner_(r), s_reg_(INVALID_SREG), def_use_mask_(mask), master_(this) { |
| 44 | switch (r.StorageSize()) { |
| 45 | case 0: storage_mask_ = 0xffffffff; break; |
| 46 | case 4: storage_mask_ = 0x00000001; break; |
| 47 | case 8: storage_mask_ = 0x00000003; break; |
| 48 | case 16: storage_mask_ = 0x0000000f; break; |
| 49 | case 32: storage_mask_ = 0x000000ff; break; |
| 50 | case 64: storage_mask_ = 0x0000ffff; break; |
| 51 | case 128: storage_mask_ = 0xffffffff; break; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 52 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 53 | used_storage_ = r.Valid() ? ~storage_mask_ : storage_mask_; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 54 | } |
| 55 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 56 | Mir2Lir::RegisterPool::RegisterPool(Mir2Lir* m2l, ArenaAllocator* arena, |
| 57 | const std::vector<RegStorage>& core_regs, |
| 58 | const std::vector<RegStorage>& sp_regs, |
| 59 | const std::vector<RegStorage>& dp_regs, |
| 60 | const std::vector<RegStorage>& reserved_regs, |
| 61 | const std::vector<RegStorage>& core_temps, |
| 62 | const std::vector<RegStorage>& sp_temps, |
| 63 | const std::vector<RegStorage>& dp_temps) : |
| 64 | core_regs_(arena, core_regs.size()), next_core_reg_(0), sp_regs_(arena, sp_regs.size()), |
| 65 | next_sp_reg_(0), dp_regs_(arena, dp_regs.size()), next_dp_reg_(0), m2l_(m2l) { |
| 66 | // Initialize the fast lookup map. |
| 67 | m2l_->reginfo_map_.Reset(); |
| 68 | m2l_->reginfo_map_.Resize(RegStorage::kMaxRegs); |
| 69 | for (unsigned i = 0; i < RegStorage::kMaxRegs; i++) { |
| 70 | m2l_->reginfo_map_.Insert(nullptr); |
| 71 | } |
| 72 | |
| 73 | // Construct the register pool. |
| 74 | for (RegStorage reg : core_regs) { |
| 75 | RegisterInfo* info = new (arena) RegisterInfo(reg, m2l_->GetRegMaskCommon(reg)); |
| 76 | m2l_->reginfo_map_.Put(reg.GetReg(), info); |
| 77 | core_regs_.Insert(info); |
| 78 | } |
| 79 | for (RegStorage reg : sp_regs) { |
| 80 | RegisterInfo* info = new (arena) RegisterInfo(reg, m2l_->GetRegMaskCommon(reg)); |
| 81 | m2l_->reginfo_map_.Put(reg.GetReg(), info); |
| 82 | sp_regs_.Insert(info); |
| 83 | } |
| 84 | for (RegStorage reg : dp_regs) { |
| 85 | RegisterInfo* info = new (arena) RegisterInfo(reg, m2l_->GetRegMaskCommon(reg)); |
| 86 | m2l_->reginfo_map_.Put(reg.GetReg(), info); |
| 87 | dp_regs_.Insert(info); |
| 88 | } |
| 89 | |
| 90 | // Keep special registers from being allocated. |
| 91 | for (RegStorage reg : reserved_regs) { |
| 92 | m2l_->MarkInUse(reg); |
| 93 | } |
| 94 | |
| 95 | // Mark temp regs - all others not in use can be used for promotion |
| 96 | for (RegStorage reg : core_temps) { |
| 97 | m2l_->MarkTemp(reg); |
| 98 | } |
| 99 | for (RegStorage reg : sp_temps) { |
| 100 | m2l_->MarkTemp(reg); |
| 101 | } |
| 102 | for (RegStorage reg : dp_temps) { |
| 103 | m2l_->MarkTemp(reg); |
| 104 | } |
| 105 | |
| 106 | // Add an entry for InvalidReg with zero'd mask. |
| 107 | RegisterInfo* invalid_reg = new (arena) RegisterInfo(RegStorage::InvalidReg(), 0); |
| 108 | m2l_->reginfo_map_.Put(RegStorage::InvalidReg().GetReg(), invalid_reg); |
| 109 | } |
| 110 | |
| 111 | void Mir2Lir::DumpRegPool(GrowableArray<RegisterInfo*>* regs) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 112 | LOG(INFO) << "================================================"; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 113 | GrowableArray<RegisterInfo*>::Iterator it(regs); |
| 114 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 115 | LOG(INFO) << StringPrintf( |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 116 | "R[%d:%d:%c]: T:%d, U:%d, W:%d, p:%d, LV:%d, D:%d, SR:%d, DEF:%d", |
| 117 | info->GetReg().GetReg(), info->GetReg().GetRegNum(), info->GetReg().IsFloat() ? 'f' : 'c', |
| 118 | info->IsTemp(), info->InUse(), info->IsWide(), info->Partner().GetReg(), info->IsLive(), |
| 119 | info->IsDirty(), info->SReg(), info->DefStart() != nullptr); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 120 | } |
| 121 | LOG(INFO) << "================================================"; |
| 122 | } |
| 123 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 124 | void Mir2Lir::DumpCoreRegPool() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 125 | DumpRegPool(®_pool_->core_regs_); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 126 | } |
| 127 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 128 | void Mir2Lir::DumpFpRegPool() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 129 | DumpRegPool(®_pool_->sp_regs_); |
| 130 | DumpRegPool(®_pool_->dp_regs_); |
| 131 | } |
| 132 | |
| 133 | void Mir2Lir::DumpRegPools() { |
| 134 | LOG(INFO) << "Core registers"; |
| 135 | DumpCoreRegPool(); |
| 136 | LOG(INFO) << "FP registers"; |
| 137 | DumpFpRegPool(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 138 | } |
| 139 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 140 | void Mir2Lir::Clobber(RegStorage reg) { |
| 141 | if (reg.IsPair()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 142 | ClobberBody(GetRegInfo(reg.GetLow())); |
| 143 | ClobberBody(GetRegInfo(reg.GetHigh())); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 144 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 145 | ClobberBody(GetRegInfo(reg)); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 146 | } |
| 147 | } |
| 148 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 149 | void Mir2Lir::ClobberSRegBody(GrowableArray<RegisterInfo*>* regs, int s_reg) { |
| 150 | GrowableArray<RegisterInfo*>::Iterator it(regs); |
| 151 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
| 152 | if ((info->SReg() == s_reg) || |
| 153 | (info->IsWide() && (GetRegInfo(info->Partner())->SReg() == s_reg))) { |
| 154 | // NOTE: a single s_reg may appear multiple times, so we can't short-circuit. |
| 155 | if (info->IsTemp()) { |
| 156 | info->SetIsLive(false); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 157 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 158 | info->ResetDefBody(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 159 | } |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * Break the association between a Dalvik vreg and a physical temp register of either register |
| 165 | * class. |
| 166 | * TODO: Ideally, the public version of this code should not exist. Besides its local usage |
| 167 | * in the register utilities, is is also used by code gen routines to work around a deficiency in |
| 168 | * local register allocation, which fails to distinguish between the "in" and "out" identities |
| 169 | * of Dalvik vregs. This can result in useless register copies when the same Dalvik vreg |
| 170 | * is used both as the source and destination register of an operation in which the type |
| 171 | * changes (for example: INT_TO_FLOAT v1, v1). Revisit when improved register allocation is |
| 172 | * addressed. |
| 173 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 174 | void Mir2Lir::ClobberSReg(int s_reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 175 | if (s_reg != INVALID_SREG) { |
| 176 | /* Reset live temp tracking sanity checker */ |
| 177 | if (kIsDebugBuild) { |
| 178 | if (s_reg == live_sreg_) { |
| 179 | live_sreg_ = INVALID_SREG; |
| 180 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 181 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 182 | ClobberSRegBody(®_pool_->core_regs_, s_reg); |
| 183 | ClobberSRegBody(®_pool_->sp_regs_, s_reg); |
| 184 | ClobberSRegBody(®_pool_->dp_regs_, s_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 185 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | /* |
| 189 | * SSA names associated with the initial definitions of Dalvik |
| 190 | * registers are the same as the Dalvik register number (and |
| 191 | * thus take the same position in the promotion_map. However, |
| 192 | * the special Method* and compiler temp resisters use negative |
| 193 | * v_reg numbers to distinguish them and can have an arbitrary |
| 194 | * ssa name (above the last original Dalvik register). This function |
| 195 | * maps SSA names to positions in the promotion_map array. |
| 196 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 197 | int Mir2Lir::SRegToPMap(int s_reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 198 | DCHECK_LT(s_reg, mir_graph_->GetNumSSARegs()); |
| 199 | DCHECK_GE(s_reg, 0); |
| 200 | int v_reg = mir_graph_->SRegToVReg(s_reg); |
| 201 | if (v_reg >= 0) { |
| 202 | DCHECK_LT(v_reg, cu_->num_dalvik_registers); |
| 203 | return v_reg; |
| 204 | } else { |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 205 | /* |
| 206 | * It must be the case that the v_reg for temporary is less than or equal to the |
| 207 | * base reg for temps. For that reason, "position" must be zero or positive. |
| 208 | */ |
| 209 | unsigned int position = std::abs(v_reg) - std::abs(static_cast<int>(kVRegTempBaseReg)); |
| 210 | |
| 211 | // The temporaries are placed after dalvik registers in the promotion map |
| 212 | DCHECK_LT(position, mir_graph_->GetNumUsedCompilerTemps()); |
| 213 | return cu_->num_dalvik_registers + position; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 214 | } |
| 215 | } |
| 216 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 217 | // TODO: refactor following Alloc/Record routines - much commonality. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 218 | void Mir2Lir::RecordCorePromotion(RegStorage reg, int s_reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 219 | int p_map_idx = SRegToPMap(s_reg); |
| 220 | int v_reg = mir_graph_->SRegToVReg(s_reg); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 221 | int reg_num = reg.GetRegNum(); |
| 222 | GetRegInfo(reg)->MarkInUse(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 223 | core_spill_mask_ |= (1 << reg_num); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 224 | // Include reg for later sort |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 225 | core_vmap_table_.push_back(reg_num << VREG_NUM_WIDTH | (v_reg & ((1 << VREG_NUM_WIDTH) - 1))); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 226 | num_core_spills_++; |
| 227 | promotion_map_[p_map_idx].core_location = kLocPhysReg; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 228 | promotion_map_[p_map_idx].core_reg = reg_num; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 229 | } |
| 230 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 231 | /* Reserve a callee-save register. Return InvalidReg if none available */ |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 232 | RegStorage Mir2Lir::AllocPreservedCoreReg(int s_reg) { |
| 233 | RegStorage res; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 234 | GrowableArray<RegisterInfo*>::Iterator it(®_pool_->core_regs_); |
| 235 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
| 236 | if (!info->IsTemp() && !info->InUse()) { |
| 237 | res = info->GetReg(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 238 | RecordCorePromotion(res, s_reg); |
| 239 | break; |
| 240 | } |
| 241 | } |
| 242 | return res; |
| 243 | } |
| 244 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 245 | void Mir2Lir::RecordSinglePromotion(RegStorage reg, int s_reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 246 | int p_map_idx = SRegToPMap(s_reg); |
| 247 | int v_reg = mir_graph_->SRegToVReg(s_reg); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 248 | GetRegInfo(reg)->MarkInUse(); |
| 249 | MarkPreservedSingle(v_reg, reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 250 | promotion_map_[p_map_idx].fp_location = kLocPhysReg; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 251 | promotion_map_[p_map_idx].FpReg = reg.GetReg(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 252 | } |
| 253 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 254 | // Reserve a callee-save sp single register. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 255 | RegStorage Mir2Lir::AllocPreservedSingle(int s_reg) { |
| 256 | RegStorage res; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 257 | GrowableArray<RegisterInfo*>::Iterator it(®_pool_->sp_regs_); |
| 258 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
| 259 | if (!info->IsTemp() && !info->InUse()) { |
| 260 | res = info->GetReg(); |
| 261 | RecordSinglePromotion(res, s_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 262 | break; |
| 263 | } |
| 264 | } |
| 265 | return res; |
| 266 | } |
| 267 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 268 | void Mir2Lir::RecordDoublePromotion(RegStorage reg, int s_reg) { |
| 269 | int p_map_idx = SRegToPMap(s_reg); |
| 270 | int v_reg = mir_graph_->SRegToVReg(s_reg); |
| 271 | GetRegInfo(reg)->MarkInUse(); |
| 272 | MarkPreservedDouble(v_reg, reg); |
| 273 | promotion_map_[p_map_idx].fp_location = kLocPhysReg; |
| 274 | promotion_map_[p_map_idx].FpReg = reg.GetReg(); |
| 275 | } |
| 276 | |
| 277 | // Reserve a callee-save dp solo register. |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 278 | RegStorage Mir2Lir::AllocPreservedDouble(int s_reg) { |
| 279 | RegStorage res; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 280 | GrowableArray<RegisterInfo*>::Iterator it(®_pool_->dp_regs_); |
| 281 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
| 282 | if (!info->IsTemp() && !info->InUse()) { |
| 283 | res = info->GetReg(); |
| 284 | RecordDoublePromotion(res, s_reg); |
| 285 | break; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 286 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 287 | } |
| 288 | return res; |
| 289 | } |
| 290 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 291 | |
| 292 | RegStorage Mir2Lir::AllocTempBody(GrowableArray<RegisterInfo*> ®s, int* next_temp, bool required) { |
| 293 | int num_regs = regs.Size(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 294 | int next = *next_temp; |
Brian Carlstrom | 38f85e4 | 2013-07-18 14:45:22 -0700 | [diff] [blame] | 295 | for (int i = 0; i< num_regs; i++) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 296 | if (next >= num_regs) |
| 297 | next = 0; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 298 | RegisterInfo* info = regs.Get(next); |
| 299 | if (info->IsTemp() && !info->InUse() && !info->IsLive()) { |
| 300 | Clobber(info->GetReg()); |
| 301 | info->MarkInUse(); |
| 302 | info->SetIsWide(false); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 303 | *next_temp = next + 1; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 304 | return info->GetReg(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 305 | } |
| 306 | next++; |
| 307 | } |
| 308 | next = *next_temp; |
Brian Carlstrom | 38f85e4 | 2013-07-18 14:45:22 -0700 | [diff] [blame] | 309 | for (int i = 0; i< num_regs; i++) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 310 | if (next >= num_regs) |
| 311 | next = 0; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 312 | RegisterInfo* info = regs.Get(next); |
| 313 | if (info->IsTemp() && !info->InUse()) { |
| 314 | Clobber(info->GetReg()); |
| 315 | info->MarkInUse(); |
| 316 | info->SetIsWide(false); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 317 | *next_temp = next + 1; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 318 | return info->GetReg(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 319 | } |
| 320 | next++; |
| 321 | } |
| 322 | if (required) { |
| 323 | CodegenDump(); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 324 | DumpRegPools(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 325 | LOG(FATAL) << "No free temp registers"; |
| 326 | } |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 327 | return RegStorage::InvalidReg(); // No register available |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 328 | } |
| 329 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 330 | /* Return a temp if one is available, -1 otherwise */ |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 331 | RegStorage Mir2Lir::AllocFreeTemp() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 332 | return AllocTempBody(reg_pool_->core_regs_, ®_pool_->next_core_reg_, false); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 333 | } |
| 334 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 335 | RegStorage Mir2Lir::AllocTemp() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 336 | return AllocTempBody(reg_pool_->core_regs_, ®_pool_->next_core_reg_, true); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 337 | } |
| 338 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 339 | RegStorage Mir2Lir::AllocTempSingle() { |
| 340 | RegStorage res = AllocTempBody(reg_pool_->sp_regs_, ®_pool_->next_sp_reg_, true); |
| 341 | DCHECK(res.IsSingle()) << "Reg: 0x" << std::hex << res.GetRawBits(); |
| 342 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 343 | } |
| 344 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 345 | RegStorage Mir2Lir::AllocTempDouble() { |
| 346 | RegStorage res = AllocTempBody(reg_pool_->dp_regs_, ®_pool_->next_dp_reg_, true); |
| 347 | DCHECK(res.IsDouble()) << "Reg: 0x" << std::hex << res.GetRawBits(); |
| 348 | return res; |
| 349 | } |
| 350 | |
| 351 | RegStorage Mir2Lir::FindLiveReg(GrowableArray<RegisterInfo*> ®s, int s_reg) { |
| 352 | RegStorage res; |
| 353 | GrowableArray<RegisterInfo*>::Iterator it(®s); |
| 354 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
| 355 | if ((info->SReg() == s_reg) && info->IsLive()) { |
| 356 | res = info->GetReg(); |
| 357 | break; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 358 | } |
| 359 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 360 | return res; |
| 361 | } |
| 362 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 363 | RegStorage Mir2Lir::AllocLiveReg(int s_reg, int reg_class, bool wide) { |
| 364 | RegStorage reg; |
| 365 | // TODO: might be worth a sanity check here to verify at most 1 live reg per s_reg. |
| 366 | if ((reg_class == kAnyReg) || (reg_class == kFPReg)) { |
| 367 | reg = FindLiveReg(wide ? reg_pool_->dp_regs_ : reg_pool_->sp_regs_, s_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 368 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 369 | if (!reg.Valid() && (reg_class != kFPReg)) { |
| 370 | reg = FindLiveReg(reg_pool_->core_regs_, s_reg); |
| 371 | } |
| 372 | if (reg.Valid()) { |
| 373 | if (wide && reg.Is32Bit() && !reg.IsFloat()) { |
| 374 | // Only allow reg pairs for Core. |
| 375 | RegStorage high_reg = FindLiveReg(reg_pool_->core_regs_, s_reg + 1); |
| 376 | if (high_reg.Valid()) { |
| 377 | RegisterInfo* info_lo = GetRegInfo(reg); |
| 378 | RegisterInfo* info_hi = GetRegInfo(high_reg); |
| 379 | if (info_lo->IsTemp()) { |
| 380 | info_lo->MarkInUse(); |
| 381 | } |
| 382 | if (info_hi->IsTemp()) { |
| 383 | info_hi->MarkInUse(); |
| 384 | } |
| 385 | reg = RegStorage::MakeRegPair(reg, high_reg); |
| 386 | MarkWide(reg); |
| 387 | } else { |
| 388 | // Only half available - clobber. |
| 389 | Clobber(reg); |
| 390 | reg = RegStorage::InvalidReg(); |
| 391 | } |
| 392 | } |
| 393 | if (reg.Valid() && !reg.IsPair()) { |
| 394 | RegisterInfo* info = GetRegInfo(reg); |
| 395 | if (info->IsTemp()) { |
| 396 | info->MarkInUse(); |
| 397 | } |
| 398 | } |
| 399 | if (reg.Valid() && (wide != GetRegInfo(reg)->IsWide())) { |
| 400 | // Width mismatch - don't try to reuse. |
| 401 | Clobber(reg); |
| 402 | reg = RegStorage::InvalidReg(); |
| 403 | } |
| 404 | } |
| 405 | return reg; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 406 | } |
| 407 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 408 | void Mir2Lir::FreeTemp(RegStorage reg) { |
| 409 | if (reg.IsPair()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 410 | FreeTemp(reg.GetLow()); |
| 411 | FreeTemp(reg.GetHigh()); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 412 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 413 | RegisterInfo* p = GetRegInfo(reg); |
| 414 | if (p->IsTemp()) { |
| 415 | p->MarkFree(); |
| 416 | p->SetIsWide(false); |
| 417 | p->SetPartner(reg); |
| 418 | } |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 419 | } |
| 420 | } |
| 421 | |
buzbee | 262b299 | 2014-03-27 11:22:43 -0700 | [diff] [blame] | 422 | bool Mir2Lir::IsLive(RegStorage reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 423 | bool res; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 424 | if (reg.IsPair()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 425 | RegisterInfo* p_lo = GetRegInfo(reg.GetLow()); |
| 426 | RegisterInfo* p_hi = GetRegInfo(reg.GetHigh()); |
| 427 | res = p_lo->IsLive() || p_hi->IsLive(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 428 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 429 | RegisterInfo* p = GetRegInfo(reg); |
| 430 | res = p->IsLive(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 431 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 432 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 433 | } |
| 434 | |
buzbee | 262b299 | 2014-03-27 11:22:43 -0700 | [diff] [blame] | 435 | bool Mir2Lir::IsTemp(RegStorage reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 436 | bool res; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 437 | if (reg.IsPair()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 438 | RegisterInfo* p_lo = GetRegInfo(reg.GetLow()); |
| 439 | RegisterInfo* p_hi = GetRegInfo(reg.GetHigh()); |
| 440 | res = p_lo->IsTemp() || p_hi->IsTemp(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 441 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 442 | RegisterInfo* p = GetRegInfo(reg); |
| 443 | res = p->IsTemp(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 444 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 445 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 446 | } |
| 447 | |
buzbee | 262b299 | 2014-03-27 11:22:43 -0700 | [diff] [blame] | 448 | bool Mir2Lir::IsPromoted(RegStorage reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 449 | bool res; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 450 | if (reg.IsPair()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 451 | RegisterInfo* p_lo = GetRegInfo(reg.GetLow()); |
| 452 | RegisterInfo* p_hi = GetRegInfo(reg.GetHigh()); |
| 453 | res = !p_lo->IsTemp() || !p_hi->IsTemp(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 454 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 455 | RegisterInfo* p = GetRegInfo(reg); |
| 456 | res = !p->IsTemp(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 457 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 458 | return res; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 459 | } |
| 460 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 461 | bool Mir2Lir::IsDirty(RegStorage reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 462 | bool res; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 463 | if (reg.IsPair()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 464 | RegisterInfo* p_lo = GetRegInfo(reg.GetLow()); |
| 465 | RegisterInfo* p_hi = GetRegInfo(reg.GetHigh()); |
| 466 | res = p_lo->IsDirty() || p_hi->IsDirty(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 467 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 468 | RegisterInfo* p = GetRegInfo(reg); |
| 469 | res = p->IsDirty(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 470 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 471 | return res; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 472 | } |
| 473 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 474 | /* |
| 475 | * Similar to AllocTemp(), but forces the allocation of a specific |
| 476 | * register. No check is made to see if the register was previously |
| 477 | * allocated. Use with caution. |
| 478 | */ |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 479 | void Mir2Lir::LockTemp(RegStorage reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 480 | DCHECK(IsTemp(reg)); |
| 481 | if (reg.IsPair()) { |
| 482 | RegisterInfo* p_lo = GetRegInfo(reg.GetLow()); |
| 483 | RegisterInfo* p_hi = GetRegInfo(reg.GetHigh()); |
| 484 | p_lo->MarkInUse(); |
| 485 | p_lo->SetIsLive(false); |
| 486 | p_hi->MarkInUse(); |
| 487 | p_hi->SetIsLive(false); |
| 488 | } else { |
| 489 | RegisterInfo* p = GetRegInfo(reg); |
| 490 | p->MarkInUse(); |
| 491 | p->SetIsLive(false); |
| 492 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 493 | } |
| 494 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 495 | void Mir2Lir::ResetDef(RegStorage reg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 496 | if (reg.IsPair()) { |
| 497 | GetRegInfo(reg.GetLow())->ResetDefBody(); |
| 498 | GetRegInfo(reg.GetHigh())->ResetDefBody(); |
| 499 | } else { |
| 500 | GetRegInfo(reg)->ResetDefBody(); |
| 501 | } |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 502 | } |
| 503 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 504 | void Mir2Lir::NullifyRange(RegStorage reg, int s_reg) { |
| 505 | RegisterInfo* info = nullptr; |
| 506 | RegStorage rs = reg.IsPair() ? reg.GetLow() : reg; |
| 507 | if (IsTemp(rs)) { |
| 508 | info = GetRegInfo(reg); |
| 509 | } |
| 510 | if ((info != nullptr) && (info->DefStart() != nullptr) && (info->DefEnd() != nullptr)) { |
| 511 | DCHECK_EQ(info->SReg(), s_reg); // Make sure we're on the same page. |
| 512 | for (LIR* p = info->DefStart();; p = p->next) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 513 | NopLIR(p); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 514 | if (p == info->DefEnd()) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 515 | break; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 516 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 517 | } |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | /* |
| 522 | * Mark the beginning and end LIR of a def sequence. Note that |
| 523 | * on entry start points to the LIR prior to the beginning of the |
| 524 | * sequence. |
| 525 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 526 | void Mir2Lir::MarkDef(RegLocation rl, LIR *start, LIR *finish) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 527 | DCHECK(!rl.wide); |
| 528 | DCHECK(start && start->next); |
| 529 | DCHECK(finish); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 530 | RegisterInfo* p = GetRegInfo(rl.reg); |
| 531 | p->SetDefStart(start->next); |
| 532 | p->SetDefEnd(finish); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | /* |
| 536 | * Mark the beginning and end LIR of a def sequence. Note that |
| 537 | * on entry start points to the LIR prior to the beginning of the |
| 538 | * sequence. |
| 539 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 540 | void Mir2Lir::MarkDefWide(RegLocation rl, LIR *start, LIR *finish) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 541 | DCHECK(rl.wide); |
| 542 | DCHECK(start && start->next); |
| 543 | DCHECK(finish); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 544 | RegisterInfo* p; |
| 545 | if (rl.reg.IsPair()) { |
| 546 | p = GetRegInfo(rl.reg.GetLow()); |
| 547 | ResetDef(rl.reg.GetHigh()); // Only track low of pair |
| 548 | } else { |
| 549 | p = GetRegInfo(rl.reg); |
| 550 | } |
| 551 | p->SetDefStart(start->next); |
| 552 | p->SetDefEnd(finish); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 553 | } |
| 554 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 555 | RegLocation Mir2Lir::WideToNarrow(RegLocation rl) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 556 | DCHECK(rl.wide); |
| 557 | if (rl.location == kLocPhysReg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 558 | if (rl.reg.IsPair()) { |
| 559 | RegisterInfo* info_lo = GetRegInfo(rl.reg.GetLow()); |
| 560 | RegisterInfo* info_hi = GetRegInfo(rl.reg.GetHigh()); |
| 561 | if (info_lo->IsTemp()) { |
| 562 | info_lo->SetIsWide(false); |
| 563 | info_lo->ResetDefBody(); |
| 564 | } |
| 565 | if (info_hi->IsTemp()) { |
| 566 | info_hi->SetIsWide(false); |
| 567 | info_hi->ResetDefBody(); |
| 568 | } |
| 569 | rl.reg = rl.reg.GetLow(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 570 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 571 | } |
| 572 | rl.wide = false; |
| 573 | return rl; |
| 574 | } |
| 575 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 576 | void Mir2Lir::ResetDefLoc(RegLocation rl) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 577 | DCHECK(!rl.wide); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 578 | if (IsTemp(rl.reg) && !(cu_->disable_opt & (1 << kSuppressLoads))) { |
| 579 | NullifyRange(rl.reg, rl.s_reg_low); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 580 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 581 | ResetDef(rl.reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 582 | } |
| 583 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 584 | void Mir2Lir::ResetDefLocWide(RegLocation rl) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 585 | DCHECK(rl.wide); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 586 | // If pair, only track low reg of pair. |
| 587 | RegStorage rs = rl.reg.IsPair() ? rl.reg.GetLow() : rl.reg; |
| 588 | if (IsTemp(rs) && !(cu_->disable_opt & (1 << kSuppressLoads))) { |
| 589 | NullifyRange(rs, rl.s_reg_low); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 590 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 591 | ResetDef(rs); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 592 | } |
| 593 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 594 | void Mir2Lir::ResetDefTracking() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 595 | GrowableArray<RegisterInfo*>::Iterator core_it(®_pool_->core_regs_); |
| 596 | for (RegisterInfo* info = core_it.Next(); info != nullptr; info = core_it.Next()) { |
| 597 | info->ResetDefBody(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 598 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 599 | GrowableArray<RegisterInfo*>::Iterator sp_it(®_pool_->core_regs_); |
| 600 | for (RegisterInfo* info = sp_it.Next(); info != nullptr; info = sp_it.Next()) { |
| 601 | info->ResetDefBody(); |
| 602 | } |
| 603 | GrowableArray<RegisterInfo*>::Iterator dp_it(®_pool_->core_regs_); |
| 604 | for (RegisterInfo* info = dp_it.Next(); info != nullptr; info = dp_it.Next()) { |
| 605 | info->ResetDefBody(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 606 | } |
| 607 | } |
| 608 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 609 | void Mir2Lir::ClobberAllRegs() { |
buzbee | bd663de | 2013-09-10 15:41:31 -0700 | [diff] [blame] | 610 | GrowableArray<RegisterInfo*>::Iterator iter(&tempreg_info_); |
| 611 | for (RegisterInfo* info = iter.Next(); info != NULL; info = iter.Next()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 612 | info->SetIsLive(false); |
| 613 | info->SetSReg(INVALID_SREG); |
| 614 | info->ResetDefBody(); |
| 615 | info->SetIsWide(false); |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | void Mir2Lir::FlushRegWide(RegStorage reg) { |
| 620 | if (reg.IsPair()) { |
| 621 | RegisterInfo* info1 = GetRegInfo(reg.GetLow()); |
| 622 | RegisterInfo* info2 = GetRegInfo(reg.GetHigh()); |
| 623 | DCHECK(info1 && info2 && info1->IsWide() && info2->IsWide() && |
| 624 | (info1->Partner() == info2->GetReg()) && (info2->Partner() == info1->GetReg())); |
| 625 | if ((info1->IsLive() && info1->IsDirty()) || (info2->IsLive() && info2->IsDirty())) { |
| 626 | if (!(info1->IsTemp() && info2->IsTemp())) { |
| 627 | /* Should not happen. If it does, there's a problem in eval_loc */ |
| 628 | LOG(FATAL) << "Long half-temp, half-promoted"; |
| 629 | } |
| 630 | |
| 631 | info1->SetIsDirty(false); |
| 632 | info2->SetIsDirty(false); |
| 633 | if (mir_graph_->SRegToVReg(info2->SReg()) < mir_graph_->SRegToVReg(info1->SReg())) { |
| 634 | info1 = info2; |
| 635 | } |
| 636 | int v_reg = mir_graph_->SRegToVReg(info1->SReg()); |
Vladimir Marko | 455759b | 2014-05-06 20:49:36 +0100 | [diff] [blame] | 637 | StoreBaseDisp(TargetReg(kSp), VRegOffset(v_reg), reg, k64); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 638 | } |
| 639 | } else { |
| 640 | RegisterInfo* info = GetRegInfo(reg); |
| 641 | if (info->IsLive() && info->IsDirty()) { |
| 642 | info->SetIsDirty(false); |
| 643 | int v_reg = mir_graph_->SRegToVReg(info->SReg()); |
Vladimir Marko | 455759b | 2014-05-06 20:49:36 +0100 | [diff] [blame] | 644 | StoreBaseDisp(TargetReg(kSp), VRegOffset(v_reg), reg, k64); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 645 | } |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | void Mir2Lir::FlushReg(RegStorage reg) { |
| 650 | DCHECK(!reg.IsPair()); |
| 651 | RegisterInfo* info = GetRegInfo(reg); |
| 652 | if (info->IsLive() && info->IsDirty()) { |
| 653 | info->SetIsDirty(false); |
| 654 | int v_reg = mir_graph_->SRegToVReg(info->SReg()); |
| 655 | StoreBaseDisp(TargetReg(kSp), VRegOffset(v_reg), reg, kWord); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 656 | } |
| 657 | } |
| 658 | |
Razvan A Lupusoru | 614c2b4 | 2014-01-28 17:05:21 -0800 | [diff] [blame] | 659 | void Mir2Lir::FlushSpecificReg(RegisterInfo* info) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 660 | if (info->IsWide()) { |
| 661 | FlushRegWide(info->GetReg()); |
Razvan A Lupusoru | 614c2b4 | 2014-01-28 17:05:21 -0800 | [diff] [blame] | 662 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 663 | FlushReg(info->GetReg()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 664 | } |
| 665 | } |
| 666 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 667 | void Mir2Lir::FlushAllRegs() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 668 | GrowableArray<RegisterInfo*>::Iterator it(&tempreg_info_); |
| 669 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
| 670 | if (info->IsLive() && info->IsDirty()) { |
| 671 | FlushSpecificReg(info); |
| 672 | } |
| 673 | DCHECK(info->IsTemp()); |
| 674 | info->SetIsLive(false); |
| 675 | info->SetSReg(INVALID_SREG); |
| 676 | info->ResetDefBody(); |
| 677 | info->SetIsWide(false); |
| 678 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 682 | bool Mir2Lir::RegClassMatches(int reg_class, RegStorage reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 683 | if (reg_class == kAnyReg) { |
| 684 | return true; |
| 685 | } else if (reg_class == kCoreReg) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 686 | return !reg.IsFloat(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 687 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 688 | return reg.IsFloat(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 689 | } |
| 690 | } |
| 691 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 692 | void Mir2Lir::MarkLiveReg(RegStorage reg, int s_reg) { |
| 693 | RegisterInfo* info = GetRegInfo(reg); |
| 694 | if ((info->SReg() == s_reg) && info->IsLive()) { |
| 695 | return; // Already live. |
| 696 | } |
| 697 | if (s_reg != INVALID_SREG) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 698 | ClobberSReg(s_reg); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 699 | if (info->IsTemp()) { |
| 700 | info->SetIsLive(true); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 701 | } |
| 702 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 703 | // Can't be live if no associated s_reg. |
| 704 | DCHECK(info->IsTemp()); |
| 705 | info->SetIsLive(false); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 706 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 707 | info->SetSReg(s_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 708 | } |
| 709 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 710 | void Mir2Lir::MarkLive(RegLocation loc) { |
| 711 | RegStorage reg = loc.reg; |
| 712 | int s_reg = loc.s_reg_low; |
| 713 | if (reg.IsPair()) { |
| 714 | MarkLiveReg(reg.GetLow(), s_reg); |
| 715 | MarkLiveReg(reg.GetHigh(), s_reg+1); |
| 716 | } else { |
| 717 | if (loc.wide) { |
| 718 | ClobberSReg(s_reg + 1); |
| 719 | } |
| 720 | MarkLiveReg(reg, s_reg); |
| 721 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 722 | } |
| 723 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 724 | void Mir2Lir::MarkTemp(RegStorage reg) { |
| 725 | DCHECK(!reg.IsPair()); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 726 | RegisterInfo* info = GetRegInfo(reg); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 727 | tempreg_info_.Insert(info); |
| 728 | info->SetIsTemp(true); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 729 | } |
| 730 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 731 | void Mir2Lir::UnmarkTemp(RegStorage reg) { |
| 732 | DCHECK(!reg.IsPair()); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 733 | RegisterInfo* info = GetRegInfo(reg); |
| 734 | tempreg_info_.Delete(info); |
| 735 | info->SetIsTemp(false); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 736 | } |
| 737 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 738 | void Mir2Lir::MarkWide(RegStorage reg) { |
| 739 | if (reg.IsPair()) { |
| 740 | RegisterInfo* info_lo = GetRegInfo(reg.GetLow()); |
| 741 | RegisterInfo* info_hi = GetRegInfo(reg.GetHigh()); |
| 742 | info_lo->SetIsWide(true); |
| 743 | info_hi->SetIsWide(true); |
| 744 | info_lo->SetPartner(reg.GetHigh()); |
| 745 | info_hi->SetPartner(reg.GetLow()); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 746 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 747 | RegisterInfo* info = GetRegInfo(reg); |
| 748 | info->SetIsWide(true); |
| 749 | info->SetPartner(reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 750 | } |
| 751 | } |
| 752 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 753 | void Mir2Lir::MarkClean(RegLocation loc) { |
| 754 | if (loc.reg.IsPair()) { |
| 755 | RegisterInfo* info = GetRegInfo(loc.reg.GetLow()); |
| 756 | info->SetIsDirty(false); |
| 757 | info = GetRegInfo(loc.reg.GetHigh()); |
| 758 | info->SetIsDirty(false); |
| 759 | } else { |
| 760 | RegisterInfo* info = GetRegInfo(loc.reg); |
| 761 | info->SetIsDirty(false); |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | // FIXME: need to verify rules/assumptions about how wide values are treated in 64BitSolos. |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 766 | void Mir2Lir::MarkDirty(RegLocation loc) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 767 | if (loc.home) { |
| 768 | // If already home, can't be dirty |
| 769 | return; |
| 770 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 771 | if (loc.reg.IsPair()) { |
| 772 | RegisterInfo* info = GetRegInfo(loc.reg.GetLow()); |
| 773 | info->SetIsDirty(true); |
| 774 | info = GetRegInfo(loc.reg.GetHigh()); |
| 775 | info->SetIsDirty(true); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 776 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 777 | RegisterInfo* info = GetRegInfo(loc.reg); |
| 778 | info->SetIsDirty(true); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 779 | } |
| 780 | } |
| 781 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 782 | void Mir2Lir::MarkInUse(RegStorage reg) { |
| 783 | if (reg.IsPair()) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 784 | GetRegInfo(reg.GetLow())->MarkInUse(); |
| 785 | GetRegInfo(reg.GetHigh())->MarkInUse(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 786 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 787 | GetRegInfo(reg)->MarkInUse(); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 788 | } |
| 789 | } |
| 790 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 791 | bool Mir2Lir::CheckCorePoolSanity() { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 792 | GrowableArray<RegisterInfo*>::Iterator it(®_pool_->core_regs_); |
| 793 | for (RegisterInfo* info = it.Next(); info != nullptr; info = it.Next()) { |
| 794 | RegStorage my_reg = info->GetReg(); |
| 795 | if (info->IsWide() && my_reg.IsPair()) { |
| 796 | int my_sreg = info->SReg(); |
| 797 | RegStorage partner_reg = info->Partner(); |
| 798 | RegisterInfo* partner = GetRegInfo(partner_reg); |
Brian Carlstrom | 6f485c6 | 2013-07-18 15:35:35 -0700 | [diff] [blame] | 799 | DCHECK(partner != NULL); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 800 | DCHECK(partner->IsWide()); |
| 801 | DCHECK_EQ(my_reg.GetReg(), partner->Partner().GetReg()); |
| 802 | int partner_sreg = partner->SReg(); |
Brian Carlstrom | 6f485c6 | 2013-07-18 15:35:35 -0700 | [diff] [blame] | 803 | if (my_sreg == INVALID_SREG) { |
| 804 | DCHECK_EQ(partner_sreg, INVALID_SREG); |
| 805 | } else { |
| 806 | int diff = my_sreg - partner_sreg; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 807 | DCHECK((diff == 0) || (diff == -1) || (diff == 1)); |
Brian Carlstrom | 6f485c6 | 2013-07-18 15:35:35 -0700 | [diff] [blame] | 808 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 809 | } else { |
| 810 | // TODO: add whatever sanity checks might be useful for 64BitSolo regs here. |
| 811 | // TODO: sanity checks for floating point pools? |
Brian Carlstrom | 6f485c6 | 2013-07-18 15:35:35 -0700 | [diff] [blame] | 812 | } |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 813 | if (!info->IsLive()) { |
| 814 | DCHECK(info->DefStart() == NULL); |
| 815 | DCHECK(info->DefEnd() == NULL); |
Brian Carlstrom | 6f485c6 | 2013-07-18 15:35:35 -0700 | [diff] [blame] | 816 | } |
| 817 | } |
| 818 | return true; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 819 | } |
| 820 | |
| 821 | /* |
| 822 | * Return an updated location record with current in-register status. |
| 823 | * If the value lives in live temps, reflect that fact. No code |
| 824 | * is generated. If the live value is part of an older pair, |
| 825 | * clobber both low and high. |
| 826 | * TUNING: clobbering both is a bit heavy-handed, but the alternative |
| 827 | * is a bit complex when dealing with FP regs. Examine code to see |
| 828 | * if it's worthwhile trying to be more clever here. |
| 829 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 830 | RegLocation Mir2Lir::UpdateLoc(RegLocation loc) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 831 | DCHECK(!loc.wide); |
| 832 | DCHECK(CheckCorePoolSanity()); |
| 833 | if (loc.location != kLocPhysReg) { |
| 834 | DCHECK((loc.location == kLocDalvikFrame) || |
| 835 | (loc.location == kLocCompilerTemp)); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 836 | RegStorage reg = AllocLiveReg(loc.s_reg_low, kAnyReg, false); |
| 837 | if (reg.Valid()) { |
| 838 | bool match = true; |
| 839 | RegisterInfo* info = GetRegInfo(reg); |
| 840 | match &= !reg.IsPair(); |
| 841 | match &= !info->IsWide(); |
| 842 | if (match) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 843 | loc.location = kLocPhysReg; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 844 | loc.reg = reg; |
| 845 | } else { |
| 846 | Clobber(reg); |
| 847 | FreeTemp(reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 848 | } |
| 849 | } |
| 850 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 851 | return loc; |
| 852 | } |
| 853 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 854 | RegLocation Mir2Lir::UpdateLocWide(RegLocation loc) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 855 | DCHECK(loc.wide); |
| 856 | DCHECK(CheckCorePoolSanity()); |
| 857 | if (loc.location != kLocPhysReg) { |
| 858 | DCHECK((loc.location == kLocDalvikFrame) || |
| 859 | (loc.location == kLocCompilerTemp)); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 860 | RegStorage reg = AllocLiveReg(loc.s_reg_low, kAnyReg, true); |
| 861 | if (reg.Valid()) { |
| 862 | bool match = true; |
| 863 | if (reg.IsPair()) { |
| 864 | // If we've got a register pair, make sure that it was last used as the same pair. |
| 865 | RegisterInfo* info_lo = GetRegInfo(reg.GetLow()); |
| 866 | RegisterInfo* info_hi = GetRegInfo(reg.GetHigh()); |
| 867 | match &= info_lo->IsWide(); |
| 868 | match &= info_hi->IsWide(); |
| 869 | match &= (info_lo->Partner() == info_hi->GetReg()); |
| 870 | match &= (info_hi->Partner() == info_lo->GetReg()); |
| 871 | } else { |
| 872 | RegisterInfo* info = GetRegInfo(reg); |
| 873 | match &= info->IsWide(); |
| 874 | match &= (info->GetReg() == info->Partner()); |
| 875 | } |
| 876 | if (match) { |
| 877 | loc.location = kLocPhysReg; |
| 878 | loc.reg = reg; |
| 879 | } else { |
| 880 | Clobber(reg); |
| 881 | FreeTemp(reg); |
| 882 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 883 | } |
| 884 | } |
| 885 | return loc; |
| 886 | } |
| 887 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 888 | /* For use in cases we don't know (or care) width */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 889 | RegLocation Mir2Lir::UpdateRawLoc(RegLocation loc) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 890 | if (loc.wide) |
| 891 | return UpdateLocWide(loc); |
| 892 | else |
| 893 | return UpdateLoc(loc); |
| 894 | } |
| 895 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 896 | RegLocation Mir2Lir::EvalLocWide(RegLocation loc, int reg_class, bool update) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 897 | DCHECK(loc.wide); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 898 | |
| 899 | loc = UpdateLocWide(loc); |
| 900 | |
| 901 | /* If already in registers, we can assume proper form. Right reg class? */ |
| 902 | if (loc.location == kLocPhysReg) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 903 | if (!RegClassMatches(reg_class, loc.reg)) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 904 | /* Wrong register class. Reallocate and copy */ |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 905 | RegStorage new_regs = AllocTypedTempWide(loc.fp, reg_class); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 906 | OpRegCopyWide(new_regs, loc.reg); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 907 | // Associate the old sreg with the new register and clobber the old register. |
| 908 | GetRegInfo(new_regs)->SetSReg(GetRegInfo(loc.reg)->SReg()); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 909 | Clobber(loc.reg); |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 910 | loc.reg = new_regs; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 911 | MarkWide(loc.reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 912 | } |
| 913 | return loc; |
| 914 | } |
| 915 | |
| 916 | DCHECK_NE(loc.s_reg_low, INVALID_SREG); |
| 917 | DCHECK_NE(GetSRegHi(loc.s_reg_low), INVALID_SREG); |
| 918 | |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 919 | loc.reg = AllocTypedTempWide(loc.fp, reg_class); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 920 | MarkWide(loc.reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 921 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 922 | if (update) { |
| 923 | loc.location = kLocPhysReg; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 924 | MarkLive(loc); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 925 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 926 | return loc; |
| 927 | } |
| 928 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 929 | RegLocation Mir2Lir::EvalLoc(RegLocation loc, int reg_class, bool update) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 930 | if (loc.wide) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 931 | return EvalLocWide(loc, reg_class, update); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 932 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 933 | |
| 934 | loc = UpdateLoc(loc); |
| 935 | |
| 936 | if (loc.location == kLocPhysReg) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 937 | if (!RegClassMatches(reg_class, loc.reg)) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 938 | /* Wrong register class. Realloc, copy and transfer ownership */ |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 939 | RegStorage new_reg = AllocTypedTemp(loc.fp, reg_class); |
| 940 | OpRegCopy(new_reg, loc.reg); |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 941 | // Associate the old sreg with the new register and clobber the old register. |
| 942 | GetRegInfo(new_reg)->SetSReg(GetRegInfo(loc.reg)->SReg()); |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 943 | Clobber(loc.reg); |
| 944 | loc.reg = new_reg; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 945 | } |
| 946 | return loc; |
| 947 | } |
| 948 | |
| 949 | DCHECK_NE(loc.s_reg_low, INVALID_SREG); |
| 950 | |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 951 | loc.reg = AllocTypedTemp(loc.fp, reg_class); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 952 | |
| 953 | if (update) { |
| 954 | loc.location = kLocPhysReg; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 955 | MarkLive(loc); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 956 | } |
| 957 | return loc; |
| 958 | } |
| 959 | |
| 960 | /* USE SSA names to count references of base Dalvik v_regs. */ |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 961 | void Mir2Lir::CountRefs(RefCounts* core_counts, RefCounts* fp_counts, size_t num_regs) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 962 | for (int i = 0; i < mir_graph_->GetNumSSARegs(); i++) { |
| 963 | RegLocation loc = mir_graph_->reg_location_[i]; |
| 964 | RefCounts* counts = loc.fp ? fp_counts : core_counts; |
| 965 | int p_map_idx = SRegToPMap(loc.s_reg_low); |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 966 | if (loc.fp) { |
| 967 | if (loc.wide) { |
| 968 | // Treat doubles as a unit, using upper half of fp_counts array. |
| 969 | counts[p_map_idx + num_regs].count += mir_graph_->GetUseCount(i); |
| 970 | i++; |
| 971 | } else { |
| 972 | counts[p_map_idx].count += mir_graph_->GetUseCount(i); |
| 973 | } |
| 974 | } else if (!IsInexpensiveConstant(loc)) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 975 | counts[p_map_idx].count += mir_graph_->GetUseCount(i); |
| 976 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 977 | } |
| 978 | } |
| 979 | |
| 980 | /* qsort callback function, sort descending */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 981 | static int SortCounts(const void *val1, const void *val2) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 982 | const Mir2Lir::RefCounts* op1 = reinterpret_cast<const Mir2Lir::RefCounts*>(val1); |
| 983 | const Mir2Lir::RefCounts* op2 = reinterpret_cast<const Mir2Lir::RefCounts*>(val2); |
Brian Carlstrom | 4b8c13e | 2013-08-23 18:10:32 -0700 | [diff] [blame] | 984 | // Note that we fall back to sorting on reg so we get stable output |
| 985 | // on differing qsort implementations (such as on host and target or |
| 986 | // between local host and build servers). |
| 987 | return (op1->count == op2->count) |
| 988 | ? (op1->s_reg - op2->s_reg) |
| 989 | : (op1->count < op2->count ? 1 : -1); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 990 | } |
| 991 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 992 | void Mir2Lir::DumpCounts(const RefCounts* arr, int size, const char* msg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 993 | LOG(INFO) << msg; |
| 994 | for (int i = 0; i < size; i++) { |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 995 | if ((arr[i].s_reg & STARTING_DOUBLE_SREG) != 0) { |
| 996 | LOG(INFO) << "s_reg[D" << (arr[i].s_reg & ~STARTING_DOUBLE_SREG) << "]: " << arr[i].count; |
| 997 | } else { |
| 998 | LOG(INFO) << "s_reg[" << arr[i].s_reg << "]: " << arr[i].count; |
| 999 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1000 | } |
| 1001 | } |
| 1002 | |
| 1003 | /* |
| 1004 | * Note: some portions of this code required even if the kPromoteRegs |
| 1005 | * optimization is disabled. |
| 1006 | */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 1007 | void Mir2Lir::DoPromotion() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1008 | int dalvik_regs = cu_->num_dalvik_registers; |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 1009 | int num_regs = dalvik_regs + mir_graph_->GetNumUsedCompilerTemps(); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1010 | const int promotion_threshold = 1; |
buzbee | d69835d | 2014-02-03 14:40:27 -0800 | [diff] [blame] | 1011 | // Allocate the promotion map - one entry for each Dalvik vReg or compiler temp |
| 1012 | promotion_map_ = static_cast<PromotionMap*> |
Vladimir Marko | 83cc7ae | 2014-02-12 18:02:05 +0000 | [diff] [blame] | 1013 | (arena_->Alloc(num_regs * sizeof(promotion_map_[0]), kArenaAllocRegAlloc)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1014 | |
| 1015 | // Allow target code to add any special registers |
| 1016 | AdjustSpillMask(); |
| 1017 | |
| 1018 | /* |
| 1019 | * Simple register promotion. Just do a static count of the uses |
| 1020 | * of Dalvik registers. Note that we examine the SSA names, but |
| 1021 | * count based on original Dalvik register name. Count refs |
| 1022 | * separately based on type in order to give allocation |
| 1023 | * preference to fp doubles - which must be allocated sequential |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 1024 | * physical single fp registers starting with an even-numbered |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1025 | * reg. |
| 1026 | * TUNING: replace with linear scan once we have the ability |
| 1027 | * to describe register live ranges for GC. |
| 1028 | */ |
| 1029 | RefCounts *core_regs = |
Mathieu Chartier | f6c4b3b | 2013-08-24 16:11:37 -0700 | [diff] [blame] | 1030 | static_cast<RefCounts*>(arena_->Alloc(sizeof(RefCounts) * num_regs, |
Vladimir Marko | 83cc7ae | 2014-02-12 18:02:05 +0000 | [diff] [blame] | 1031 | kArenaAllocRegAlloc)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1032 | RefCounts *FpRegs = |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 1033 | static_cast<RefCounts *>(arena_->Alloc(sizeof(RefCounts) * num_regs * 2, |
Vladimir Marko | 83cc7ae | 2014-02-12 18:02:05 +0000 | [diff] [blame] | 1034 | kArenaAllocRegAlloc)); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1035 | // Set ssa names for original Dalvik registers |
| 1036 | for (int i = 0; i < dalvik_regs; i++) { |
| 1037 | core_regs[i].s_reg = FpRegs[i].s_reg = i; |
| 1038 | } |
Razvan A Lupusoru | da7a69b | 2014-01-08 15:09:50 -0800 | [diff] [blame] | 1039 | |
| 1040 | // Set ssa names for compiler temporaries |
| 1041 | for (unsigned int ct_idx = 0; ct_idx < mir_graph_->GetNumUsedCompilerTemps(); ct_idx++) { |
| 1042 | CompilerTemp* ct = mir_graph_->GetCompilerTemp(ct_idx); |
| 1043 | core_regs[dalvik_regs + ct_idx].s_reg = ct->s_reg_low; |
| 1044 | FpRegs[dalvik_regs + ct_idx].s_reg = ct->s_reg_low; |
| 1045 | FpRegs[num_regs + dalvik_regs + ct_idx].s_reg = ct->s_reg_low; |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 1046 | } |
| 1047 | |
| 1048 | // Duplicate in upper half to represent possible fp double starting sregs. |
| 1049 | for (int i = 0; i < num_regs; i++) { |
| 1050 | FpRegs[num_regs + i].s_reg = FpRegs[i].s_reg | STARTING_DOUBLE_SREG; |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1051 | } |
| 1052 | |
| 1053 | // Sum use counts of SSA regs by original Dalvik vreg. |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 1054 | CountRefs(core_regs, FpRegs, num_regs); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1055 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1056 | |
| 1057 | // Sort the count arrays |
| 1058 | qsort(core_regs, num_regs, sizeof(RefCounts), SortCounts); |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 1059 | qsort(FpRegs, num_regs * 2, sizeof(RefCounts), SortCounts); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1060 | |
| 1061 | if (cu_->verbose) { |
| 1062 | DumpCounts(core_regs, num_regs, "Core regs after sort"); |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 1063 | DumpCounts(FpRegs, num_regs * 2, "Fp regs after sort"); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1064 | } |
| 1065 | |
| 1066 | if (!(cu_->disable_opt & (1 << kPromoteRegs))) { |
| 1067 | // Promote FpRegs |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 1068 | for (int i = 0; (i < (num_regs * 2)) && (FpRegs[i].count >= promotion_threshold); i++) { |
| 1069 | int p_map_idx = SRegToPMap(FpRegs[i].s_reg & ~STARTING_DOUBLE_SREG); |
| 1070 | if ((FpRegs[i].s_reg & STARTING_DOUBLE_SREG) != 0) { |
| 1071 | if ((promotion_map_[p_map_idx].fp_location != kLocPhysReg) && |
| 1072 | (promotion_map_[p_map_idx + 1].fp_location != kLocPhysReg)) { |
| 1073 | int low_sreg = FpRegs[i].s_reg & ~STARTING_DOUBLE_SREG; |
| 1074 | // Ignore result - if can't alloc double may still be able to alloc singles. |
| 1075 | AllocPreservedDouble(low_sreg); |
| 1076 | } |
| 1077 | } else if (promotion_map_[p_map_idx].fp_location != kLocPhysReg) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 1078 | RegStorage reg = AllocPreservedSingle(FpRegs[i].s_reg); |
| 1079 | if (!reg.Valid()) { |
buzbee | c729a6b | 2013-09-14 16:04:31 -0700 | [diff] [blame] | 1080 | break; // No more left. |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1081 | } |
| 1082 | } |
| 1083 | } |
| 1084 | |
| 1085 | // Promote core regs |
| 1086 | for (int i = 0; (i < num_regs) && |
| 1087 | (core_regs[i].count >= promotion_threshold); i++) { |
| 1088 | int p_map_idx = SRegToPMap(core_regs[i].s_reg); |
| 1089 | if (promotion_map_[p_map_idx].core_location != |
| 1090 | kLocPhysReg) { |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 1091 | RegStorage reg = AllocPreservedCoreReg(core_regs[i].s_reg); |
| 1092 | if (!reg.Valid()) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1093 | break; // No more left |
| 1094 | } |
| 1095 | } |
| 1096 | } |
| 1097 | } |
| 1098 | |
| 1099 | // Now, update SSA names to new home locations |
| 1100 | for (int i = 0; i < mir_graph_->GetNumSSARegs(); i++) { |
| 1101 | RegLocation *curr = &mir_graph_->reg_location_[i]; |
| 1102 | int p_map_idx = SRegToPMap(curr->s_reg_low); |
| 1103 | if (!curr->wide) { |
| 1104 | if (curr->fp) { |
| 1105 | if (promotion_map_[p_map_idx].fp_location == kLocPhysReg) { |
| 1106 | curr->location = kLocPhysReg; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 1107 | curr->reg = RegStorage::Solo32(promotion_map_[p_map_idx].FpReg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1108 | curr->home = true; |
| 1109 | } |
| 1110 | } else { |
| 1111 | if (promotion_map_[p_map_idx].core_location == kLocPhysReg) { |
| 1112 | curr->location = kLocPhysReg; |
buzbee | 2700f7e | 2014-03-07 09:46:20 -0800 | [diff] [blame] | 1113 | curr->reg = RegStorage::Solo32(promotion_map_[p_map_idx].core_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1114 | curr->home = true; |
| 1115 | } |
| 1116 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1117 | } else { |
| 1118 | if (curr->high_word) { |
| 1119 | continue; |
| 1120 | } |
| 1121 | if (curr->fp) { |
| 1122 | if ((promotion_map_[p_map_idx].fp_location == kLocPhysReg) && |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 1123 | (promotion_map_[p_map_idx+1].fp_location == kLocPhysReg)) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1124 | int low_reg = promotion_map_[p_map_idx].FpReg; |
| 1125 | int high_reg = promotion_map_[p_map_idx+1].FpReg; |
| 1126 | // Doubles require pair of singles starting at even reg |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 1127 | // TODO: move target-specific restrictions out of here. |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1128 | if (((low_reg & 0x1) == 0) && ((low_reg + 1) == high_reg)) { |
| 1129 | curr->location = kLocPhysReg; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 1130 | if (cu_->instruction_set == kThumb2) { |
| 1131 | curr->reg = RegStorage::FloatSolo64(RegStorage::RegNum(low_reg) >> 1); |
| 1132 | } else { |
| 1133 | curr->reg = RegStorage(RegStorage::k64BitPair, low_reg, high_reg); |
| 1134 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1135 | curr->home = true; |
| 1136 | } |
| 1137 | } |
| 1138 | } else { |
| 1139 | if ((promotion_map_[p_map_idx].core_location == kLocPhysReg) |
| 1140 | && (promotion_map_[p_map_idx+1].core_location == |
| 1141 | kLocPhysReg)) { |
| 1142 | curr->location = kLocPhysReg; |
Bill Buzbee | 00e1ec6 | 2014-02-27 23:44:13 +0000 | [diff] [blame] | 1143 | curr->reg = RegStorage(RegStorage::k64BitPair, promotion_map_[p_map_idx].core_reg, |
| 1144 | promotion_map_[p_map_idx+1].core_reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1145 | curr->home = true; |
| 1146 | } |
| 1147 | } |
| 1148 | } |
| 1149 | } |
| 1150 | if (cu_->verbose) { |
| 1151 | DumpPromotionMap(); |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | /* Returns sp-relative offset in bytes for a VReg */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 1156 | int Mir2Lir::VRegOffset(int v_reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1157 | return StackVisitor::GetVRegOffset(cu_->code_item, core_spill_mask_, |
Nicolas Geoffray | 42fcd98 | 2014-04-22 11:03:52 +0000 | [diff] [blame] | 1158 | fp_spill_mask_, frame_size_, v_reg, |
| 1159 | cu_->instruction_set); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1160 | } |
| 1161 | |
| 1162 | /* Returns sp-relative offset in bytes for a SReg */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 1163 | int Mir2Lir::SRegOffset(int s_reg) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1164 | return VRegOffset(mir_graph_->SRegToVReg(s_reg)); |
| 1165 | } |
| 1166 | |
| 1167 | /* Mark register usage state and return long retloc */ |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 1168 | RegLocation Mir2Lir::GetReturnWide(bool is_double) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1169 | RegLocation gpr_res = LocCReturnWide(); |
| 1170 | RegLocation fpr_res = LocCReturnDouble(); |
| 1171 | RegLocation res = is_double ? fpr_res : gpr_res; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 1172 | if (res.reg.IsPair()) { |
| 1173 | Clobber(res.reg); |
| 1174 | LockTemp(res.reg); |
| 1175 | // Does this wide value live in two registers or one vector register? |
| 1176 | if (res.reg.GetLowReg() != res.reg.GetHighReg()) { |
| 1177 | // FIXME: I think we want to mark these as wide as well. |
| 1178 | MarkWide(res.reg); |
| 1179 | } |
| 1180 | } else { |
| 1181 | Clobber(res.reg); |
| 1182 | LockTemp(res.reg); |
| 1183 | MarkWide(res.reg); |
Bill Buzbee | d61ba4b | 2014-01-13 21:44:01 +0000 | [diff] [blame] | 1184 | } |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1185 | return res; |
| 1186 | } |
| 1187 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 1188 | RegLocation Mir2Lir::GetReturn(bool is_float) { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1189 | RegLocation gpr_res = LocCReturn(); |
| 1190 | RegLocation fpr_res = LocCReturnFloat(); |
| 1191 | RegLocation res = is_float ? fpr_res : gpr_res; |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 1192 | Clobber(res.reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1193 | if (cu_->instruction_set == kMips) { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 1194 | MarkInUse(res.reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1195 | } else { |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 1196 | LockTemp(res.reg); |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1197 | } |
| 1198 | return res; |
| 1199 | } |
| 1200 | |
Brian Carlstrom | 2ce745c | 2013-07-17 17:44:30 -0700 | [diff] [blame] | 1201 | void Mir2Lir::SimpleRegAlloc() { |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1202 | DoPromotion(); |
| 1203 | |
| 1204 | if (cu_->verbose && !(cu_->disable_opt & (1 << kPromoteRegs))) { |
| 1205 | LOG(INFO) << "After Promotion"; |
| 1206 | mir_graph_->DumpRegLocTable(mir_graph_->reg_location_, mir_graph_->GetNumSSARegs()); |
| 1207 | } |
| 1208 | |
| 1209 | /* Set the frame size */ |
| 1210 | frame_size_ = ComputeFrameSize(); |
| 1211 | } |
| 1212 | |
| 1213 | /* |
| 1214 | * Get the "real" sreg number associated with an s_reg slot. In general, |
| 1215 | * s_reg values passed through codegen are the SSA names created by |
| 1216 | * dataflow analysis and refer to slot numbers in the mir_graph_->reg_location |
| 1217 | * array. However, renaming is accomplished by simply replacing RegLocation |
| 1218 | * entries in the reglocation[] array. Therefore, when location |
| 1219 | * records for operands are first created, we need to ask the locRecord |
| 1220 | * identified by the dataflow pass what it's new name is. |
| 1221 | */ |
| 1222 | int Mir2Lir::GetSRegHi(int lowSreg) { |
| 1223 | return (lowSreg == INVALID_SREG) ? INVALID_SREG : lowSreg + 1; |
| 1224 | } |
| 1225 | |
buzbee | 091cc40 | 2014-03-31 10:14:40 -0700 | [diff] [blame] | 1226 | bool Mir2Lir::LiveOut(int s_reg) { |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 1227 | // For now. |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1228 | return true; |
| 1229 | } |
| 1230 | |
Brian Carlstrom | 7940e44 | 2013-07-12 13:46:57 -0700 | [diff] [blame] | 1231 | } // namespace art |