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authorpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
committerpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
commitb64793999546ed8adebaeebd9d8345d18db8927d (patch)
tree4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/lib/Target/Mips/MipsTargetObjectFile.cpp
parentAdd support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff)
downloadwireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.tar.xz
wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.zip
Remove LLVM 8.0.1 files.
Diffstat (limited to 'gnu/llvm/lib/Target/Mips/MipsTargetObjectFile.cpp')
-rw-r--r--gnu/llvm/lib/Target/Mips/MipsTargetObjectFile.cpp196
1 files changed, 0 insertions, 196 deletions
diff --git a/gnu/llvm/lib/Target/Mips/MipsTargetObjectFile.cpp b/gnu/llvm/lib/Target/Mips/MipsTargetObjectFile.cpp
deleted file mode 100644
index f53ee0631b5..00000000000
--- a/gnu/llvm/lib/Target/Mips/MipsTargetObjectFile.cpp
+++ /dev/null
@@ -1,196 +0,0 @@
-//===-- MipsTargetObjectFile.cpp - Mips Object Files ----------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "MipsTargetObjectFile.h"
-#include "MipsSubtarget.h"
-#include "MipsTargetMachine.h"
-#include "MCTargetDesc/MipsMCExpr.h"
-#include "llvm/BinaryFormat/ELF.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/GlobalVariable.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCSectionELF.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Target/TargetMachine.h"
-using namespace llvm;
-
-static cl::opt<unsigned>
-SSThreshold("mips-ssection-threshold", cl::Hidden,
- cl::desc("Small data and bss section threshold size (default=8)"),
- cl::init(8));
-
-static cl::opt<bool>
-LocalSData("mlocal-sdata", cl::Hidden,
- cl::desc("MIPS: Use gp_rel for object-local data."),
- cl::init(true));
-
-static cl::opt<bool>
-ExternSData("mextern-sdata", cl::Hidden,
- cl::desc("MIPS: Use gp_rel for data that is not defined by the "
- "current object."),
- cl::init(true));
-
-static cl::opt<bool>
-EmbeddedData("membedded-data", cl::Hidden,
- cl::desc("MIPS: Try to allocate variables in the following"
- " sections if possible: .rodata, .sdata, .data ."),
- cl::init(false));
-
-void MipsTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM){
- TargetLoweringObjectFileELF::Initialize(Ctx, TM);
- InitializeELF(TM.Options.UseInitArray);
-
- SmallDataSection = getContext().getELFSection(
- ".sdata", ELF::SHT_PROGBITS,
- ELF::SHF_WRITE | ELF::SHF_ALLOC | ELF::SHF_MIPS_GPREL);
-
- SmallBSSSection = getContext().getELFSection(".sbss", ELF::SHT_NOBITS,
- ELF::SHF_WRITE | ELF::SHF_ALLOC |
- ELF::SHF_MIPS_GPREL);
- this->TM = &static_cast<const MipsTargetMachine &>(TM);
-}
-
-// A address must be loaded from a small section if its size is less than the
-// small section size threshold. Data in this section must be addressed using
-// gp_rel operator.
-static bool IsInSmallSection(uint64_t Size) {
- // gcc has traditionally not treated zero-sized objects as small data, so this
- // is effectively part of the ABI.
- return Size > 0 && Size <= SSThreshold;
-}
-
-/// Return true if this global address should be placed into small data/bss
-/// section.
-bool MipsTargetObjectFile::IsGlobalInSmallSection(
- const GlobalObject *GO, const TargetMachine &TM) const {
- // We first check the case where global is a declaration, because finding
- // section kind using getKindForGlobal() is only allowed for global
- // definitions.
- if (GO->isDeclaration() || GO->hasAvailableExternallyLinkage())
- return IsGlobalInSmallSectionImpl(GO, TM);
-
- return IsGlobalInSmallSection(GO, TM, getKindForGlobal(GO, TM));
-}
-
-/// Return true if this global address should be placed into small data/bss
-/// section.
-bool MipsTargetObjectFile::
-IsGlobalInSmallSection(const GlobalObject *GO, const TargetMachine &TM,
- SectionKind Kind) const {
- return IsGlobalInSmallSectionImpl(GO, TM) &&
- (Kind.isData() || Kind.isBSS() || Kind.isCommon() ||
- Kind.isReadOnly());
-}
-
-/// Return true if this global address should be placed into small data/bss
-/// section. This method does all the work, except for checking the section
-/// kind.
-bool MipsTargetObjectFile::
-IsGlobalInSmallSectionImpl(const GlobalObject *GO,
- const TargetMachine &TM) const {
- const MipsSubtarget &Subtarget =
- *static_cast<const MipsTargetMachine &>(TM).getSubtargetImpl();
-
- // Return if small section is not available.
- if (!Subtarget.useSmallSection())
- return false;
-
- // Only global variables, not functions.
- const GlobalVariable *GVA = dyn_cast<GlobalVariable>(GO);
- if (!GVA)
- return false;
-
- // If the variable has an explicit section, it is placed in that section but
- // it's addressing mode may change.
- if (GVA->hasSection()) {
- StringRef Section = GVA->getSection();
-
- // Explicitly placing any variable in the small data section overrides
- // the global -G value.
- if (Section == ".sdata" || Section == ".sbss")
- return true;
-
- // Otherwise reject accessing it through the gp pointer. There are some
- // historic cases which GCC doesn't appear to respect any more. These
- // are .lit4, .lit8 and .srdata. For the moment reject these as well.
- return false;
- }
-
- // Enforce -mlocal-sdata.
- if (!LocalSData && GVA->hasLocalLinkage())
- return false;
-
- // Enforce -mextern-sdata.
- if (!ExternSData && ((GVA->hasExternalLinkage() && GVA->isDeclaration()) ||
- GVA->hasCommonLinkage()))
- return false;
-
- // Enforce -membedded-data.
- if (EmbeddedData && GVA->isConstant())
- return false;
-
- Type *Ty = GVA->getValueType();
-
- // It is possible that the type of the global is unsized, i.e. a declaration
- // of a extern struct. In this case don't presume it is in the small data
- // section. This happens e.g. when building the FreeBSD kernel.
- if (!Ty->isSized())
- return false;
-
- return IsInSmallSection(
- GVA->getParent()->getDataLayout().getTypeAllocSize(Ty));
-}
-
-MCSection *MipsTargetObjectFile::SelectSectionForGlobal(
- const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const {
- // TODO: Could also support "weak" symbols as well with ".gnu.linkonce.s.*"
- // sections?
-
- // Handle Small Section classification here.
- if (Kind.isBSS() && IsGlobalInSmallSection(GO, TM, Kind))
- return SmallBSSSection;
- if (Kind.isData() && IsGlobalInSmallSection(GO, TM, Kind))
- return SmallDataSection;
- if (Kind.isReadOnly() && IsGlobalInSmallSection(GO, TM, Kind))
- return SmallDataSection;
-
- // Otherwise, we work the same as ELF.
- return TargetLoweringObjectFileELF::SelectSectionForGlobal(GO, Kind, TM);
-}
-
-/// Return true if this constant should be placed into small data section.
-bool MipsTargetObjectFile::IsConstantInSmallSection(
- const DataLayout &DL, const Constant *CN, const TargetMachine &TM) const {
- return (static_cast<const MipsTargetMachine &>(TM)
- .getSubtargetImpl()
- ->useSmallSection() &&
- LocalSData && IsInSmallSection(DL.getTypeAllocSize(CN->getType())));
-}
-
-/// Return true if this constant should be placed into small data section.
-MCSection *MipsTargetObjectFile::getSectionForConstant(const DataLayout &DL,
- SectionKind Kind,
- const Constant *C,
- unsigned &Align) const {
- if (IsConstantInSmallSection(DL, C, *TM))
- return SmallDataSection;
-
- // Otherwise, we work the same as ELF.
- return TargetLoweringObjectFileELF::getSectionForConstant(DL, Kind, C, Align);
-}
-
-const MCExpr *
-MipsTargetObjectFile::getDebugThreadLocalSymbol(const MCSymbol *Sym) const {
- const MCExpr *Expr =
- MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
- Expr = MCBinaryExpr::createAdd(
- Expr, MCConstantExpr::create(0x8000, getContext()), getContext());
- return MipsMCExpr::create(MipsMCExpr::MEK_DTPREL, Expr, getContext());
-}