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Diffstat (limited to 'lib/Target/ARM64/ARM64Subtarget.cpp')
| -rw-r--r-- | lib/Target/ARM64/ARM64Subtarget.cpp | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/lib/Target/ARM64/ARM64Subtarget.cpp b/lib/Target/ARM64/ARM64Subtarget.cpp deleted file mode 100644 index 14b5444..0000000 --- a/lib/Target/ARM64/ARM64Subtarget.cpp +++ /dev/null @@ -1,100 +0,0 @@ -//===-- ARM64Subtarget.cpp - ARM64 Subtarget Information --------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file implements the ARM64 specific subclass of TargetSubtarget. -// -//===----------------------------------------------------------------------===// - -#include "ARM64InstrInfo.h" -#include "ARM64Subtarget.h" -#include "llvm/ADT/SmallVector.h" -#include "llvm/CodeGen/MachineScheduler.h" -#include "llvm/IR/GlobalValue.h" -#include "llvm/Support/TargetRegistry.h" - -#define GET_SUBTARGETINFO_CTOR -#define GET_SUBTARGETINFO_TARGET_DESC -#include "ARM64GenSubtargetInfo.inc" - -using namespace llvm; - -ARM64Subtarget::ARM64Subtarget(const std::string &TT, const std::string &CPU, - const std::string &FS) - : ARM64GenSubtargetInfo(TT, CPU, FS), HasZeroCycleRegMove(false), - HasZeroCycleZeroing(false), CPUString(CPU), TargetTriple(TT) { - // Determine default and user-specified characteristics - - if (CPUString.empty()) - // We default to Cyclone for now. - CPUString = "cyclone"; - - ParseSubtargetFeatures(CPUString, FS); -} - -/// ClassifyGlobalReference - Find the target operand flags that describe -/// how a global value should be referenced for the current subtarget. -unsigned char -ARM64Subtarget::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; - - // MachO large model always goes via a GOT, simply to get a single 8-byte - // absolute relocation on all global addresses. - if (TM.getCodeModel() == CodeModel::Large && isTargetMachO()) - return ARM64II::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 ARM64II::MO_GOT; - - // If symbol visibility is hidden, the extra load is not needed if - // the symbol is definitely defined in the current translation unit. - - // The handling of non-hidden symbols in PIC mode is rather target-dependent: - // + On MachO, if the symbol is defined in this module the GOT can be - // skipped. - // + On ELF, the R_AARCH64_COPY relocation means that even symbols actually - // defined could end up in unexpected places. Use a GOT. - if (TM.getRelocationModel() != Reloc::Static && GV->hasDefaultVisibility()) { - if (isTargetMachO()) - return (isDecl || GV->isWeakForLinker()) ? ARM64II::MO_GOT - : ARM64II::MO_NO_FLAG; - else - return ARM64II::MO_GOT; - } - - return ARM64II::MO_NO_FLAG; -} - -/// This function returns the name of a function which has an interface -/// like the non-standard bzero function, if such a function exists on -/// the current subtarget and it is considered prefereable over -/// memset with zero passed as the second argument. Otherwise it -/// returns null. -const char *ARM64Subtarget::getBZeroEntry() const { - // At the moment, always prefer bzero. - return "bzero"; -} - -void ARM64Subtarget::overrideSchedPolicy(MachineSchedPolicy &Policy, - MachineInstr *begin, MachineInstr *end, - unsigned NumRegionInstrs) const { - // LNT run (at least on Cyclone) showed reasonably significant gains for - // bi-directional scheduling. 253.perlbmk. - Policy.OnlyTopDown = false; - Policy.OnlyBottomUp = false; -} |