ARMSubtarget.cpp revision 31d157ae1ac2cd9c787dc3c1d28e64c682803844
131d157ae1ac2cd9c787dc3c1d28e64c682803844Jia Liu//===-- ARMSubtarget.cpp - ARM Subtarget Information ----------------------===// 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_TARGET_DESC 22ebdeeab812beec0385b445f3d4c41a114e0d972fEvan Cheng#define GET_SUBTARGETINFO_CTOR 23385e930d55f3ecd3c9538823dfa5896a12461845Evan Cheng#include "ARMGenSubtargetInfo.inc" 2494214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng 25a8e2989ece6dc46df59b0768184028257f913843Evan Chengusing namespace llvm; 26a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 2754fc124d72512d65d62565cabcd85c7b07496513Bob Wilsonstatic cl::opt<bool> 2854fc124d72512d65d62565cabcd85c7b07496513Bob WilsonReserveR9("arm-reserve-r9", cl::Hidden, 2954fc124d72512d65d62565cabcd85c7b07496513Bob Wilson cl::desc("Reserve R9, making it unavailable as GPR")); 3054fc124d72512d65d62565cabcd85c7b07496513Bob Wilson 315cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikovstatic cl::opt<bool> 3253519f015e3e84e9f57b677cc8724805a6009b73Evan ChengDarwinUseMOVT("arm-darwin-use-movt", cl::init(true), cl::Hidden); 335cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov 3402aba73a9ec04d0de9424422249af3948ca9573aBob Wilsonstatic cl::opt<bool> 3502aba73a9ec04d0de9424422249af3948ca9573aBob WilsonStrictAlign("arm-strict-align", cl::Hidden, 3602aba73a9ec04d0de9424422249af3948ca9573aBob Wilson cl::desc("Disallow all unaligned memory accesses")); 3702aba73a9ec04d0de9424422249af3948ca9573aBob Wilson 38276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan ChengARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &CPU, 3994ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng const std::string &FS) 400ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng : ARMGenSubtargetInfo(TT, CPU, FS) 413ef1c8759a20167457eb7fd82ebcaffe7ccaa1d1Evan Cheng , ARMProcFamily(Others) 4239dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV4TOps(false) 4339dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV5TOps(false) 4439dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV5TEOps(false) 4539dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV6Ops(false) 4639dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV6T2Ops(false) 4739dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasV7Ops(false) 4839dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasVFPv2(false) 4939dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasVFPv3(false) 504b4e62219be91839091f9e35d8accf877f925d81Anton Korobeynikov , HasVFPv4(false) 5139dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng , HasNEON(false) 524b4e62219be91839091f9e35d8accf877f925d81Anton Korobeynikov , HasNEONVFPv4(false) 537ec7a0e96b34fedf11445c1dde27a4fac8e8a1a7Jim Grosbach , UseNEONForSinglePrecisionFP(false) 5448575f6ea7d5cd21ab29ca370f58fcf9ca31400bEvan Cheng , SlowFPVMLx(false) 550e3ee43ea058a35ab5ce69cceafd316d49eaad34Benjamin Kramer , HasVMLxForwarding(false) 569de1ac267e197d40cec7a14041f2bf69498536c9Evan Cheng , SlowFPBrcc(false) 57963b03c1a9f6a9742671459f103ee9a566c6de58Evan Cheng , InThumbMode(false) 5894ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng , HasThumb2(false) 59acad68da50581de905a994ed3c6b9c197bcea687James Molloy , IsMClass(false) 607b4d31176efe6894bcfaa05257dd5783acda5ddcEvan Cheng , NoARM(false) 610dad89fa94536284d51f60868326294b725a0c61David Goodwin , PostRAScheduler(false) 6254fc124d72512d65d62565cabcd85c7b07496513Bob Wilson , IsR9Reserved(ReserveR9) 635de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng , UseMovt(false) 646d2f9cec715c50bca44816d9bdea97f8b63bf2a0Bob Wilson , SupportsTailCall(false) 65631379e79c0971c5bac13629b8caf8912ed4c35cAnton Korobeynikov , HasFP16(false) 6677f42b52781b6923924a93b8ab338d183887a592Bob Wilson , HasD16(false) 6729402132f3e890a2771818f44987ede213297431Jim Grosbach , HasHardwareDivide(false) 6829402132f3e890a2771818f44987ede213297431Jim Grosbach , HasT2ExtractPack(false) 6911db068721d44fd5f9b0c2a3a4c90f813d2eae9cEvan Cheng , HasDataBarrier(false) 709de1ac267e197d40cec7a14041f2bf69498536c9Evan Cheng , Pref32BitThumb(false) 715dde893c2bac9e1569c38429f756c1d723e8edf2Bob Wilson , AvoidCPSRPartialUpdate(false) 72dfed19fe2c34c1209108afa58e8ab014ffd894e2Evan Cheng , HasMPExtension(false) 73fcba5e6b645df89ae6b93911fe0f80b08fa6b44cJim Grosbach , FPOnlySP(false) 7402aba73a9ec04d0de9424422249af3948ca9573aBob Wilson , AllowsUnalignedMem(false) 75a7603982dbf9e240ecc7ed6eddcd1cdb868107acJim Grosbach , Thumb2DSP(false) 763630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio , stackAlignment(4) 77276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan Cheng , CPUString(CPU) 78b72d2a92b75daa9cbac7338aff0cd8ae04c2b4bdEvan Cheng , TargetTriple(TT) 793630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio , TargetABI(ARM_ABI_APCS) { 80a8e2989ece6dc46df59b0768184028257f913843Evan Cheng // Determine default and user specified characteristics 81276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan Cheng if (CPUString.empty()) 82276365dd4bc0c2160f91fd8062ae1fc90c86c324Evan Cheng CPUString = "generic"; 834b1747430a2d67702958b95d6776396734f184a0Evan Cheng 844cc446bc400b2ff58af81c91f5e145b81d6beb26Evan Cheng // Insert the architecture feature derived from the target triple into the 854cc446bc400b2ff58af81c91f5e145b81d6beb26Evan Cheng // feature string. This is important for setting features that are implied 864cc446bc400b2ff58af81c91f5e145b81d6beb26Evan Cheng // based on the architecture version. 87db068738e806753bc5735434cab9b9f930840c7aEvan Cheng std::string ArchFS = ARM_MC::ParseARMTriple(TT); 8894ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng if (!FS.empty()) { 8994ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng if (!ArchFS.empty()) 9094ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng ArchFS = ArchFS + "," + FS; 9194ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng else 9294ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng ArchFS = FS; 9394ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng } 940ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng ParseSubtargetFeatures(CPUString, ArchFS); 9594ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng 9694ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng // Thumb2 implies at least V6T2. FIXME: Fix tests to explicitly specify a 9794ca42ff0407d71bacc41de4032d8dbe6358d33dEvan Cheng // ARM version or CPU and then remove this. 9839dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng if (!HasV6T2Ops && hasThumb2()) 9939dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng HasV4TOps = HasV5TOps = HasV5TEOps = HasV6Ops = HasV6T2Ops = true; 10066f6c79450a93d979128d8702c83841c8f715dc8Bob Wilson 10194214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng // Initialize scheduling itinerary for the specified CPU. 10294214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng InstrItins = getInstrItineraryForCPU(CPUString); 10394214703d97d8d9dfca88174ffc7e94820a85e62Evan Cheng 1042da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick // After parsing Itineraries, set ItinData.IssueWidth. 1052da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick computeIssueWidth(); 1062da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick 1070ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng if (TT.find("eabi") != std::string::npos) 1080ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng TargetABI = ARM_ABI_AAPCS; 1090ddff1b5359433faf2eb1c4ff5320ddcbd42f52fEvan Cheng 1103630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio if (isAAPCS_ABI()) 1113630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio stackAlignment = 8; 1123630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 113afff941211526a31f931aa9fcac84ae42ff60ef0Evan Cheng if (!isTargetIOS()) 1145de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng UseMovt = hasV6T2Ops(); 1155de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng else { 11639dfb0ff848be6b380ca81ff95d4ca4e0ae09c76Evan Cheng IsR9Reserved = ReserveR9 | !HasV6Ops; 11753519f015e3e84e9f57b677cc8724805a6009b73Evan Cheng UseMovt = DarwinUseMOVT && hasV6T2Ops(); 1186d2f9cec715c50bca44816d9bdea97f8b63bf2a0Bob Wilson const Triple &T = getTargetTriple(); 119afff941211526a31f931aa9fcac84ae42ff60ef0Evan Cheng SupportsTailCall = !T.isOSVersionLT(5, 0); 1205de5d4b6d0eb3fd379fa571d82f6fa764460b3b8Evan Cheng } 121471850ab84301dd47cab2bf8d694fcb5766c1169David Goodwin 122d3dd50fec00fbbb76edbfaff4d613f1248d21c9eEvan Cheng if (!isThumb() || hasThumb2()) 123d3dd50fec00fbbb76edbfaff4d613f1248d21c9eEvan Cheng PostRAScheduler = true; 12402aba73a9ec04d0de9424422249af3948ca9573aBob Wilson 12502aba73a9ec04d0de9424422249af3948ca9573aBob Wilson // v6+ may or may not support unaligned mem access depending on the system 12602aba73a9ec04d0de9424422249af3948ca9573aBob Wilson // configuration. 12702aba73a9ec04d0de9424422249af3948ca9573aBob Wilson if (!StrictAlign && hasV6Ops() && isTargetDarwin()) 12802aba73a9ec04d0de9424422249af3948ca9573aBob Wilson AllowsUnalignedMem = true; 129a8e2989ece6dc46df59b0768184028257f913843Evan Cheng} 130e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng 131e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng/// GVIsIndirectSymbol - true if the GV will be accessed via an indirect symbol. 13263476a80404125e5196b6c09113c1d4796da0604Evan Chengbool 13346510a73e977273ec67747eb34cbdb43f815e451Dan GohmanARMSubtarget::GVIsIndirectSymbol(const GlobalValue *GV, 13446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman Reloc::Model RelocM) const { 13563476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (RelocM == Reloc::Static) 136e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng return false; 13763476a80404125e5196b6c09113c1d4796da0604Evan Cheng 138f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin // Materializable GVs (in JIT lazy compilation mode) do not require an extra 139f0356fe140af1a30587b9a86bcfb1b2c51b8ce20Jeffrey Yasskin // load from stub. 140af05c69ba024b1838ae6f1071d6fd0f9fe33999fEvan Cheng bool isDecl = GV->hasAvailableExternallyLinkage(); 141af05c69ba024b1838ae6f1071d6fd0f9fe33999fEvan Cheng if (GV->isDeclaration() && !GV->isMaterializable()) 142af05c69ba024b1838ae6f1071d6fd0f9fe33999fEvan Cheng isDecl = true; 14363476a80404125e5196b6c09113c1d4796da0604Evan Cheng 14463476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!isTargetDarwin()) { 14563476a80404125e5196b6c09113c1d4796da0604Evan Cheng // Extra load is needed for all externally visible. 14663476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (GV->hasLocalLinkage() || GV->hasHiddenVisibility()) 14763476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 14863476a80404125e5196b6c09113c1d4796da0604Evan Cheng return true; 14963476a80404125e5196b6c09113c1d4796da0604Evan Cheng } else { 15063476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (RelocM == Reloc::PIC_) { 15163476a80404125e5196b6c09113c1d4796da0604Evan Cheng // If this is a strong reference to a definition, it is definitely not 15263476a80404125e5196b6c09113c1d4796da0604Evan Cheng // through a stub. 15363476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!isDecl && !GV->isWeakForLinker()) 15463476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 15563476a80404125e5196b6c09113c1d4796da0604Evan Cheng 15663476a80404125e5196b6c09113c1d4796da0604Evan Cheng // Unless we have a symbol with hidden visibility, we have to go through a 15763476a80404125e5196b6c09113c1d4796da0604Evan Cheng // normal $non_lazy_ptr stub because this symbol might be resolved late. 15863476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!GV->hasHiddenVisibility()) // Non-hidden $non_lazy_ptr reference. 15963476a80404125e5196b6c09113c1d4796da0604Evan Cheng return true; 16063476a80404125e5196b6c09113c1d4796da0604Evan Cheng 16163476a80404125e5196b6c09113c1d4796da0604Evan Cheng // If symbol visibility is hidden, we have a stub for common symbol 16263476a80404125e5196b6c09113c1d4796da0604Evan Cheng // references and external declarations. 16363476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (isDecl || GV->hasCommonLinkage()) 16463476a80404125e5196b6c09113c1d4796da0604Evan Cheng // Hidden $non_lazy_ptr reference. 16563476a80404125e5196b6c09113c1d4796da0604Evan Cheng return true; 16663476a80404125e5196b6c09113c1d4796da0604Evan Cheng 16763476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 16863476a80404125e5196b6c09113c1d4796da0604Evan Cheng } else { 16963476a80404125e5196b6c09113c1d4796da0604Evan Cheng // If this is a strong reference to a definition, it is definitely not 17063476a80404125e5196b6c09113c1d4796da0604Evan Cheng // through a stub. 17163476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!isDecl && !GV->isWeakForLinker()) 17263476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 1736e8f4c404825b79f9b9176483653f1aa927dfbdeAndrew Trick 17463476a80404125e5196b6c09113c1d4796da0604Evan Cheng // Unless we have a symbol with hidden visibility, we have to go through a 17563476a80404125e5196b6c09113c1d4796da0604Evan Cheng // normal $non_lazy_ptr stub because this symbol might be resolved late. 17663476a80404125e5196b6c09113c1d4796da0604Evan Cheng if (!GV->hasHiddenVisibility()) // Non-hidden $non_lazy_ptr reference. 17763476a80404125e5196b6c09113c1d4796da0604Evan Cheng return true; 17863476a80404125e5196b6c09113c1d4796da0604Evan Cheng } 17963476a80404125e5196b6c09113c1d4796da0604Evan Cheng } 18063476a80404125e5196b6c09113c1d4796da0604Evan Cheng 18163476a80404125e5196b6c09113c1d4796da0604Evan Cheng return false; 182e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng} 183c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin 184654d5440a477b1f6c89b051107e041a331f78e27Owen Andersonunsigned ARMSubtarget::getMispredictionPenalty() const { 185654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson // If we have a reasonable estimate of the pipeline depth, then we can 186654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson // estimate the penalty of a misprediction based on that. 187654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson if (isCortexA8()) 188654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson return 13; 189654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson else if (isCortexA9()) 190654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson return 8; 1916e8f4c404825b79f9b9176483653f1aa927dfbdeAndrew Trick 192654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson // Otherwise, just return a sensible default. 193654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson return 10; 194654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson} 195654d5440a477b1f6c89b051107e041a331f78e27Owen Anderson 1962da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trickvoid ARMSubtarget::computeIssueWidth() { 1972da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick unsigned allStage1Units = 0; 1982da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick for (const InstrItinerary *itin = InstrItins.Itineraries; 1992da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick itin->FirstStage != ~0U; ++itin) { 2002da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick const InstrStage *IS = InstrItins.Stages + itin->FirstStage; 2012da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick allStage1Units |= IS->getUnits(); 2022da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick } 2032da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick InstrItins.IssueWidth = 0; 2042da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick while (allStage1Units) { 2052da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick ++InstrItins.IssueWidth; 2062da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick // clear the lowest bit 2072da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick allStage1Units ^= allStage1Units & ~(allStage1Units - 1); 2082da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick } 2096018deefe823598a3bbe03de9af354d269ae2130Andrew Trick assert(InstrItins.IssueWidth <= 2 && "itinerary bug, too many stage 1 units"); 2102da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick} 2112da8bc8a5f7705ac131184cd247f48500da0d74eAndrew Trick 212c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwinbool ARMSubtarget::enablePostRAScheduler( 213c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin CodeGenOpt::Level OptLevel, 2145b1b4489cf3a0f56f8be0673fc5cc380a32d277bEvan Cheng TargetSubtargetInfo::AntiDepBreakMode& Mode, 21587d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin RegClassVector& CriticalPathRCs) const { 2165b1b4489cf3a0f56f8be0673fc5cc380a32d277bEvan Cheng Mode = TargetSubtargetInfo::ANTIDEP_CRITICAL; 21787d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin CriticalPathRCs.clear(); 21887d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin CriticalPathRCs.push_back(&ARM::GPRRegClass); 219c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin return PostRAScheduler && OptLevel >= CodeGenOpt::Default; 220c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin} 221