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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_XXX. | 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_XXX. |
6 | 6 |
7 #include "vm/flow_graph_compiler.h" | 7 #include "vm/flow_graph_compiler.h" |
8 | 8 |
9 #include "vm/bit_vector.h" | 9 #include "vm/bit_vector.h" |
10 #include "vm/cha.h" | 10 #include "vm/cha.h" |
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1183 if (!blocked_registers[regno]) { | 1183 if (!blocked_registers[regno]) { |
1184 blocked_registers[regno] = true; | 1184 blocked_registers[regno] = true; |
1185 return static_cast<Register>(regno); | 1185 return static_cast<Register>(regno); |
1186 } | 1186 } |
1187 } | 1187 } |
1188 UNREACHABLE(); | 1188 UNREACHABLE(); |
1189 return kNoRegister; | 1189 return kNoRegister; |
1190 } | 1190 } |
1191 | 1191 |
1192 | 1192 |
1193 static uword RegMaskBit(Register reg) { | 1193 #define REG_MASK_BIT(reg) (((reg) != kNoRegister) ? (1 << (reg)) : 0) |
1194 return ((reg) != kNoRegister) ? (1 << (reg)) : 0; | |
1195 } | |
1196 | |
1197 | |
1198 // Mask of globally reserved registers. Some other registers are only reserved | 1194 // Mask of globally reserved registers. Some other registers are only reserved |
1199 // in particular code (e.g., ARGS_DESC_REG in intrinsics). | 1195 // in particular code (e.g., ARGS_DESC_REG in intrinsics). |
1200 static const uword kReservedCpuRegisters = RegMaskBit(SPREG) | 1196 static const uword kReservedCpuRegisters = REG_MASK_BIT(SPREG) |
1201 | RegMaskBit(FPREG) | 1197 | REG_MASK_BIT(FPREG) |
1202 | RegMaskBit(TMP) | 1198 | REG_MASK_BIT(TMP) |
1203 | RegMaskBit(TMP2) | 1199 | REG_MASK_BIT(TMP2) |
1204 | RegMaskBit(PP) | 1200 | REG_MASK_BIT(PP) |
1205 | RegMaskBit(THR); | 1201 | REG_MASK_BIT(THR); |
1206 | 1202 |
1207 | 1203 |
1208 void FlowGraphCompiler::AllocateRegistersLocally(Instruction* instr) { | 1204 void FlowGraphCompiler::AllocateRegistersLocally(Instruction* instr) { |
1209 ASSERT(!is_optimizing()); | 1205 ASSERT(!is_optimizing()); |
1210 | 1206 |
1211 instr->InitializeLocationSummary(zone(), | 1207 instr->InitializeLocationSummary(zone(), |
1212 false); // Not optimizing. | 1208 false); // Not optimizing. |
1213 LocationSummary* locs = instr->locs(); | 1209 LocationSummary* locs = instr->locs(); |
1214 | 1210 |
1215 bool blocked_registers[kNumberOfCpuRegisters]; | 1211 bool blocked_registers[kNumberOfCpuRegisters]; |
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1502 resolver_->RestoreFpuScratch(reg_); | 1498 resolver_->RestoreFpuScratch(reg_); |
1503 } | 1499 } |
1504 } | 1500 } |
1505 | 1501 |
1506 | 1502 |
1507 ParallelMoveResolver::ScratchRegisterScope::ScratchRegisterScope( | 1503 ParallelMoveResolver::ScratchRegisterScope::ScratchRegisterScope( |
1508 ParallelMoveResolver* resolver, Register blocked) | 1504 ParallelMoveResolver* resolver, Register blocked) |
1509 : resolver_(resolver), | 1505 : resolver_(resolver), |
1510 reg_(kNoRegister), | 1506 reg_(kNoRegister), |
1511 spilled_(false) { | 1507 spilled_(false) { |
1512 uword blocked_mask = RegMaskBit(blocked) | kReservedCpuRegisters; | 1508 uword blocked_mask = REG_MASK_BIT(blocked) | kReservedCpuRegisters; |
1513 if (resolver->compiler_->intrinsic_mode()) { | 1509 if (resolver->compiler_->intrinsic_mode()) { |
1514 // Block additional registers that must be preserved for intrinsics. | 1510 // Block additional registers that must be preserved for intrinsics. |
1515 blocked_mask |= RegMaskBit(ARGS_DESC_REG); | 1511 blocked_mask |= REG_MASK_BIT(ARGS_DESC_REG); |
1516 } | 1512 } |
1517 reg_ = static_cast<Register>( | 1513 reg_ = static_cast<Register>( |
1518 resolver_->AllocateScratchRegister(Location::kRegister, | 1514 resolver_->AllocateScratchRegister(Location::kRegister, |
1519 blocked_mask, | 1515 blocked_mask, |
1520 kFirstFreeCpuRegister, | 1516 kFirstFreeCpuRegister, |
1521 kLastFreeCpuRegister, | 1517 kLastFreeCpuRegister, |
1522 &spilled_)); | 1518 &spilled_)); |
1523 | 1519 |
1524 if (spilled_) { | 1520 if (spilled_) { |
1525 resolver->SpillScratch(reg_); | 1521 resolver->SpillScratch(reg_); |
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1726 | 1722 |
1727 | 1723 |
1728 void FlowGraphCompiler::FrameStateClear() { | 1724 void FlowGraphCompiler::FrameStateClear() { |
1729 ASSERT(!is_optimizing()); | 1725 ASSERT(!is_optimizing()); |
1730 frame_state_.TruncateTo(0); | 1726 frame_state_.TruncateTo(0); |
1731 } | 1727 } |
1732 #endif | 1728 #endif |
1733 | 1729 |
1734 | 1730 |
1735 } // namespace dart | 1731 } // namespace dart |
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