ARMSubtarget.cpp revision 0ddff1b5359433faf2eb1c4ff5320ddcbd42f52f
1a8e2989ece6dc46df59b0768184028257f913843Evan Cheng//===-- ARMSubtarget.cpp - ARM Subtarget Information ------------*- C++ -*-===// 2a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 3a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// The LLVM Compiler Infrastructure 4a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 54ee451de366474b9c228b4e5fa573795a715216dChris Lattner// This file is distributed under the University of Illinois Open Source 64ee451de366474b9c228b4e5fa573795a715216dChris Lattner// License. See LICENSE.TXT for details. 7a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 8a8e2989ece6dc46df59b0768184028257f913843Evan Cheng//===----------------------------------------------------------------------===// 9a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 105b1b4489cf3a0f56f8be0673fc5cc380a32d277bEvan Cheng// This file implements the ARM specific subclass of TargetSubtargetInfo. 11a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 12a8e2989ece6dc46df59b0768184028257f913843Evan Cheng//===----------------------------------------------------------------------===// 13a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 14a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include "ARMSubtarget.h" 15b72d2a92b75daa9cbac7338aff0cd8ae04c2b4bdEvan Cheng#include "ARMBaseRegisterInfo.h" 16e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng#include "llvm/GlobalValue.h" 175b1b4489cf3a0f56f8be0673fc5cc380a32d277bEvan Cheng#include "llvm/Target/TargetSubtargetInfo.h" 1854fc124d72512d65d62565cabcd85c7b07496513Bob Wilson#include "llvm/Support/CommandLine.h" 19c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin#include "llvm/ADT/SmallVector.h" 2094214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng 2194214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng#define GET_SUBTARGETINFO_CTOR 2294214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng#define GET_SUBTARGETINFO_MC_DESC 2394214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng#define GET_SUBTARGETINFO_TARGET_DESC 24385e930d55f3ecd3c9538823dfa5896a12461845Evan Cheng#include "ARMGenSubtargetInfo.inc" 2594214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng 26a8e2989ece6dc46df59b0768184028257f913843Evan Chengusing namespace llvm; 27a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 2854fc124d72512d65d62565cabcd85c7b07496513Bob Wilsonstatic cl::opt<bool> 2954fc124d72512d65d62565cabcd85c7b07496513Bob WilsonReserveR9("arm-reserve-r9", cl::Hidden, 3054fc124d72512d65d62565cabcd85c7b07496513Bob Wilson cl::desc("Reserve R9, making it unavailable as GPR")); 3154fc124d72512d65d62565cabcd85c7b07496513Bob Wilson 325cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikovstatic cl::opt<bool> 3353519f015e3e84e9f57b677cc8724805a6009b73Evan ChengDarwinUseMOVT("arm-darwin-use-movt", cl::init(true), cl::Hidden); 345cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov 3502aba73a9ec04d0de9424422249af3948ca9573aBob Wilsonstatic cl::opt<bool> 3602aba73a9ec04d0de9424422249af3948ca9573aBob WilsonStrictAlign("arm-strict-align", cl::Hidden, 3702aba73a9ec04d0de9424422249af3948ca9573aBob Wilson cl::desc("Disallow all unaligned memory accesses")); 3802aba73a9ec04d0de9424422249af3948ca9573aBob Wilson 39276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan ChengARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &CPU, 4094ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng const std::string &FS) 410ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng : ARMGenSubtargetInfo(TT, CPU, FS) 423ef1c8759a20167457eb7fd82ebcaffe7ccaa1d1Evan Cheng , ARMProcFamily(Others) 4339dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV4TOps(false) 4439dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV5TOps(false) 4539dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV5TEOps(false) 4639dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV6Ops(false) 4739dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV6T2Ops(false) 4839dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV7Ops(false) 4939dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasVFPv2(false) 5039dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasVFPv3(false) 5139dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasNEON(false) 527ec7a0e96b34fedf11445c1dde27a4fac8e8a1a7Jim Grosbach , UseNEONForSinglePrecisionFP(false) 5348575f6ea7d5cd21ab29ca370f58fcf9ca31400bEvan Cheng , SlowFPVMLx(false) 540e3ee43ea058a35ab5ce69cceafd316d49eaad34Benjamin Kramer , HasVMLxForwarding(false) 559de1ac267e197d40cec7a14041f2bf69498536c9Evan Cheng , SlowFPBrcc(false) 5694ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng , IsThumb(false) 5794ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng , HasThumb2(false) 587b4d31176efe6894bcfaa05257dd5783acda5ddcEvan Cheng , NoARM(false) 590dad89fa94536284d51f60868326294b725a0c61David Goodwin , PostRAScheduler(false) 6054fc124d72512d65d62565cabcd85c7b07496513Bob Wilson , IsR9Reserved(ReserveR9) 615de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng , UseMovt(false) 62631379e79c0971c5bac13629b8caf8912ed4c35cAnton Korobeynikov , HasFP16(false) 6377f42b52781b6923924a93b8ab338d183887a592Bob Wilson , HasD16(false) 6429402132f3e890a2771818f44987ede213297431Jim Grosbach , HasHardwareDivide(false) 6529402132f3e890a2771818f44987ede213297431Jim Grosbach , HasT2ExtractPack(false) 6611db068721d44fd5f9b0c2a3a4c90f813d2eae9cEvan Cheng , HasDataBarrier(false) 679de1ac267e197d40cec7a14041f2bf69498536c9Evan Cheng , Pref32BitThumb(false) 685dde893c2bac9e1569c38429f756c1d723e8edf2Bob Wilson , AvoidCPSRPartialUpdate(false) 69dfed19fe2c34c1209108afa58e8ab014ffd894e2Evan Cheng , HasMPExtension(false) 70fcba5e6b645df89ae6b93911fe0f80b08fa6b44cJim Grosbach , FPOnlySP(false) 7102aba73a9ec04d0de9424422249af3948ca9573aBob Wilson , AllowsUnalignedMem(false) 72a7603982dbf9e240ecc7ed6eddcd1cdb868107acJim Grosbach , Thumb2DSP(false) 733630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio , stackAlignment(4) 74276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan Cheng , CPUString(CPU) 75b72d2a92b75daa9cbac7338aff0cd8ae04c2b4bdEvan Cheng , TargetTriple(TT) 763630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio , TargetABI(ARM_ABI_APCS) { 77a8e2989ece6dc46df59b0768184028257f913843Evan Cheng // Determine default and user specified characteristics 78276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan Cheng if (CPUString.empty()) 79276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan Cheng CPUString = "generic"; 804b1747430a2d67702958b95d6776396734f184a0Evan Cheng 814cc446bc400b2ff58af81c91f5e145b81d6beb26Evan Cheng // Insert the architecture feature derived from the target triple into the 824cc446bc400b2ff58af81c91f5e145b81d6beb26Evan Cheng // feature string. This is important for setting features that are implied 834cc446bc400b2ff58af81c91f5e145b81d6beb26Evan Cheng // based on the architecture version. 8494ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng std::string ArchFS = ARM_MC::ParseARMTriple(TT, IsThumb); 8594ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng if (!FS.empty()) { 8694ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng if (!ArchFS.empty()) 8794ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng ArchFS = ArchFS + "," + FS; 8894ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng else 8994ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng ArchFS = FS; 9094ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng } 9194ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng 920ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng ParseSubtargetFeatures(CPUString, ArchFS); 9394ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng 9494ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng // Thumb2 implies at least V6T2. FIXME: Fix tests to explicitly specify a 9594ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng // ARM version or CPU and then remove this. 9639dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng if (!HasV6T2Ops && hasThumb2()) 9739dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng HasV4TOps = HasV5TOps = HasV5TEOps = HasV6Ops = HasV6T2Ops = true; 9866f6c79450a93d979128d8702c83841c8f715dc8Bob Wilson 9994214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng // Initialize scheduling itinerary for the specified CPU. 10094214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng InstrItins = getInstrItineraryForCPU(CPUString); 10194214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng 1022da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick // After parsing Itineraries, set ItinData.IssueWidth. 1032da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick computeIssueWidth(); 1042da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick 1050ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng if (TT.find("eabi") != std::string::npos) 1060ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng TargetABI = ARM_ABI_AAPCS; 1070ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng 1083630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio if (isAAPCS_ABI()) 1093630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio stackAlignment = 8; 1103630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 1115de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng if (!isTargetDarwin()) 1125de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng UseMovt = hasV6T2Ops(); 1135de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng else { 11439dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng IsR9Reserved = ReserveR9 | !HasV6Ops; 11553519f015e3e84e9f57b677cc8724805a6009b73Evan Cheng UseMovt = DarwinUseMOVT && hasV6T2Ops(); 1165de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng } 117471850ab84301dd47cab2bf8d694fcb5766c1169David Goodwin 118d3dd50fec00fbbb76edbfaff4d613f1248d21c9eEvan Cheng if (!isThumb() || hasThumb2()) 119d3dd50fec00fbbb76edbfaff4d613f1248d21c9eEvan Cheng PostRAScheduler = true; 12002aba73a9ec04d0de9424422249af3948ca9573aBob Wilson 12102aba73a9ec04d0de9424422249af3948ca9573aBob Wilson // v6+ may or may not support unaligned mem access depending on the system 12202aba73a9ec04d0de9424422249af3948ca9573aBob Wilson // configuration. 12302aba73a9ec04d0de9424422249af3948ca9573aBob Wilson if (!StrictAlign && hasV6Ops() && isTargetDarwin()) 12402aba73a9ec04d0de9424422249af3948ca9573aBob Wilson AllowsUnalignedMem = true; 125a8e2989ece6dc46df59b0768184028257f913843Evan Cheng} 126e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng 127e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng/// GVIsIndirectSymbol - true if the GV will be accessed via an indirect symbol. 12863476a80404125e5196b6c09113c1d4796da0604Evan Chengbool 12946510a73e977273ec67747eb34cbdb43f815e451Dan GohmanARMSubtarget::GVIsIndirectSymbol(const GlobalValue *GV, 13046510a73e977273ec67747eb34cbdb43f815e451Dan Gohman Reloc::Model RelocM) const { 13163476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (RelocM == Reloc::Static) 132e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng return false; 13363476a80404125e5196b6c09113c1d4796da0604Evan Cheng 134f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin // Materializable GVs (in JIT lazy compilation mode) do not require an extra 135f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin // load from stub. 136af05c69ba024b1838ae6f1071d6fd0f9fe33999fEvan Cheng bool isDecl = GV->hasAvailableExternallyLinkage(); 137af05c69ba024b1838ae6f1071d6fd0f9fe33999fEvan Cheng if (GV->isDeclaration() && !GV->isMaterializable()) 138af05c69ba024b1838ae6f1071d6fd0f9fe33999fEvan Cheng isDecl = true; 13963476a80404125e5196b6c09113c1d4796da0604Evan Cheng 14063476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!isTargetDarwin()) { 14163476a80404125e5196b6c09113c1d4796da0604Evan Cheng // Extra load is needed for all externally visible. 14263476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (GV->hasLocalLinkage() || GV->hasHiddenVisibility()) 14363476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 14463476a80404125e5196b6c09113c1d4796da0604Evan Cheng return true; 14563476a80404125e5196b6c09113c1d4796da0604Evan Cheng } else { 14663476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (RelocM == Reloc::PIC_) { 14763476a80404125e5196b6c09113c1d4796da0604Evan Cheng // If this is a strong reference to a definition, it is definitely not 14863476a80404125e5196b6c09113c1d4796da0604Evan Cheng // through a stub. 14963476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!isDecl && !GV->isWeakForLinker()) 15063476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 15163476a80404125e5196b6c09113c1d4796da0604Evan Cheng 15263476a80404125e5196b6c09113c1d4796da0604Evan Cheng // Unless we have a symbol with hidden visibility, we have to go through a 15363476a80404125e5196b6c09113c1d4796da0604Evan Cheng // normal $non_lazy_ptr stub because this symbol might be resolved late. 15463476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!GV->hasHiddenVisibility()) // Non-hidden $non_lazy_ptr reference. 15563476a80404125e5196b6c09113c1d4796da0604Evan Cheng return true; 15663476a80404125e5196b6c09113c1d4796da0604Evan Cheng 15763476a80404125e5196b6c09113c1d4796da0604Evan Cheng // If symbol visibility is hidden, we have a stub for common symbol 15863476a80404125e5196b6c09113c1d4796da0604Evan Cheng // references and external declarations. 15963476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (isDecl || GV->hasCommonLinkage()) 16063476a80404125e5196b6c09113c1d4796da0604Evan Cheng // Hidden $non_lazy_ptr reference. 16163476a80404125e5196b6c09113c1d4796da0604Evan Cheng return true; 16263476a80404125e5196b6c09113c1d4796da0604Evan Cheng 16363476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 16463476a80404125e5196b6c09113c1d4796da0604Evan Cheng } else { 16563476a80404125e5196b6c09113c1d4796da0604Evan Cheng // If this is a strong reference to a definition, it is definitely not 16663476a80404125e5196b6c09113c1d4796da0604Evan Cheng // through a stub. 16763476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!isDecl && !GV->isWeakForLinker()) 16863476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 1696e8f4c404825b79f9b9176483653f1aa927dfbdeAndrew Trick 17063476a80404125e5196b6c09113c1d4796da0604Evan Cheng // Unless we have a symbol with hidden visibility, we have to go through a 17163476a80404125e5196b6c09113c1d4796da0604Evan Cheng // normal $non_lazy_ptr stub because this symbol might be resolved late. 17263476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!GV->hasHiddenVisibility()) // Non-hidden $non_lazy_ptr reference. 17363476a80404125e5196b6c09113c1d4796da0604Evan Cheng return true; 17463476a80404125e5196b6c09113c1d4796da0604Evan Cheng } 17563476a80404125e5196b6c09113c1d4796da0604Evan Cheng } 17663476a80404125e5196b6c09113c1d4796da0604Evan Cheng 17763476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 178e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng} 179c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin 180654d5440a477b1f6c89b051107e041a331f78e27Owen Andersonunsigned ARMSubtarget::getMispredictionPenalty() const { 181654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson // If we have a reasonable estimate of the pipeline depth, then we can 182654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson // estimate the penalty of a misprediction based on that. 183654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson if (isCortexA8()) 184654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson return 13; 185654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson else if (isCortexA9()) 186654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson return 8; 1876e8f4c404825b79f9b9176483653f1aa927dfbdeAndrew Trick 188654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson // Otherwise, just return a sensible default. 189654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson return 10; 190654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson} 191654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson 1922da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trickvoid ARMSubtarget::computeIssueWidth() { 1932da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick unsigned allStage1Units = 0; 1942da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick for (const InstrItinerary *itin = InstrItins.Itineraries; 1952da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick itin->FirstStage != ~0U; ++itin) { 1962da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick const InstrStage *IS = InstrItins.Stages + itin->FirstStage; 1972da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick allStage1Units |= IS->getUnits(); 1982da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick } 1992da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick InstrItins.IssueWidth = 0; 2002da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick while (allStage1Units) { 2012da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick ++InstrItins.IssueWidth; 2022da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick // clear the lowest bit 2032da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick allStage1Units ^= allStage1Units & ~(allStage1Units - 1); 2042da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick } 2056018deefe823598a3bbe03de9af354d269ae2130Andrew Trick assert(InstrItins.IssueWidth <= 2 && "itinerary bug, too many stage 1 units"); 2062da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick} 2072da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick 208c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwinbool ARMSubtarget::enablePostRAScheduler( 209c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin CodeGenOpt::Level OptLevel, 2105b1b4489cf3a0f56f8be0673fc5cc380a32d277bEvan Cheng TargetSubtargetInfo::AntiDepBreakMode& Mode, 21187d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin RegClassVector& CriticalPathRCs) const { 2125b1b4489cf3a0f56f8be0673fc5cc380a32d277bEvan Cheng Mode = TargetSubtargetInfo::ANTIDEP_CRITICAL; 21387d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin CriticalPathRCs.clear(); 21487d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin CriticalPathRCs.push_back(&ARM::GPRRegClass); 215c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin return PostRAScheduler && OptLevel >= CodeGenOpt::Default; 216c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin} 217