| //===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "SystemZSubtarget.h" |
| #include "llvm/IR/GlobalValue.h" |
| |
| #define GET_SUBTARGETINFO_TARGET_DESC |
| #define GET_SUBTARGETINFO_CTOR |
| #include "SystemZGenSubtargetInfo.inc" |
| |
| using namespace llvm; |
| |
| SystemZSubtarget::SystemZSubtarget(const std::string &TT, |
| const std::string &CPU, |
| const std::string &FS) |
| : SystemZGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT) { |
| std::string CPUName = CPU; |
| if (CPUName.empty()) |
| CPUName = "z10"; |
| |
| // Parse features string. |
| ParseSubtargetFeatures(CPUName, FS); |
| } |
| |
| // Return true if GV binds locally under reloc model RM. |
| static bool bindsLocally(const GlobalValue *GV, Reloc::Model RM) { |
| // For non-PIC, all symbols bind locally. |
| if (RM == Reloc::Static) |
| return true; |
| |
| return GV->hasLocalLinkage() || !GV->hasDefaultVisibility(); |
| } |
| |
| bool SystemZSubtarget::isPC32DBLSymbol(const GlobalValue *GV, |
| Reloc::Model RM, |
| CodeModel::Model CM) const { |
| // PC32DBL accesses require the low bit to be clear. Note that a zero |
| // value selects the default alignment and is therefore OK. |
| if (GV->getAlignment() == 1) |
| return false; |
| |
| // For the small model, all locally-binding symbols are in range. |
| if (CM == CodeModel::Small) |
| return bindsLocally(GV, RM); |
| |
| // For Medium and above, assume that the symbol is not within the 4GB range. |
| // Taking the address of locally-defined text would be OK, but that |
| // case isn't easy to detect. |
| return false; |
| } |