diff options
Diffstat (limited to 'lib/Target/AArch64/AArch64Subtarget.cpp')
| -rw-r--r-- | lib/Target/AArch64/AArch64Subtarget.cpp | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/lib/Target/AArch64/AArch64Subtarget.cpp b/lib/Target/AArch64/AArch64Subtarget.cpp index bb0b72c..47b5d54 100644 --- a/lib/Target/AArch64/AArch64Subtarget.cpp +++ b/lib/Target/AArch64/AArch64Subtarget.cpp @@ -12,6 +12,7 @@ //===----------------------------------------------------------------------===// #include "AArch64InstrInfo.h" +#include "AArch64PBQPRegAlloc.h" #include "AArch64Subtarget.h" #include "llvm/ADT/SmallVector.h" #include "llvm/CodeGen/MachineScheduler.h" @@ -43,8 +44,8 @@ AArch64Subtarget::initializeSubtargetDependencies(StringRef FS) { AArch64Subtarget::AArch64Subtarget(const std::string &TT, const std::string &CPU, - const std::string &FS, TargetMachine &TM, - bool LittleEndian) + const std::string &FS, + const TargetMachine &TM, bool LittleEndian) : AArch64GenSubtargetInfo(TT, CPU, FS), ARMProcFamily(Others), HasFPARMv8(false), HasNEON(false), HasCrypto(false), HasCRC(false), HasZeroCycleRegMove(false), HasZeroCycleZeroing(false), CPUString(CPU), @@ -64,13 +65,7 @@ AArch64Subtarget::AArch64Subtarget(const std::string &TT, unsigned char AArch64Subtarget::ClassifyGlobalReference(const GlobalValue *GV, const TargetMachine &TM) const { - - // Determine whether this is a reference to a definition or a declaration. - // Materializable GVs (in JIT lazy compilation mode) do not require an extra - // load from stub. - bool isDecl = GV->hasAvailableExternallyLinkage(); - if (GV->isDeclaration() && !GV->isMaterializable()) - isDecl = true; + bool isDecl = GV->isDeclarationForLinker(); // MachO large model always goes via a GOT, simply to get a single 8-byte // absolute relocation on all global addresses. @@ -78,10 +73,15 @@ AArch64Subtarget::ClassifyGlobalReference(const GlobalValue *GV, return AArch64II::MO_GOT; // The small code mode's direct accesses use ADRP, which cannot necessarily - // produce the value 0 (if the code is above 4GB). Therefore they must use the - // GOT. - if (TM.getCodeModel() == CodeModel::Small && GV->isWeakForLinker() && isDecl) - return AArch64II::MO_GOT; + // produce the value 0 (if the code is above 4GB). + if (TM.getCodeModel() == CodeModel::Small && + GV->isWeakForLinker() && isDecl) { + // In PIC mode use the GOT, but in absolute mode use a constant pool load. + if (TM.getRelocationModel() == Reloc::Static) + return AArch64II::MO_CONSTPOOL; + else + return AArch64II::MO_GOT; + } // If symbol visibility is hidden, the extra load is not needed if // the symbol is definitely defined in the current translation unit. @@ -128,3 +128,11 @@ void AArch64Subtarget::overrideSchedPolicy(MachineSchedPolicy &Policy, bool AArch64Subtarget::enableEarlyIfConversion() const { return EnableEarlyIfConvert; } + +std::unique_ptr<PBQPRAConstraint> +AArch64Subtarget::getCustomPBQPConstraints() const { + if (!isCortexA57()) + return nullptr; + + return llvm::make_unique<A57ChainingConstraint>(); +} |