mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-22 09:29:31 +00:00
7ffec838a2
This patch adds the safe stack instrumentation pass to LLVM, which separates the program stack into a safe stack, which stores return addresses, register spills, and local variables that are statically verified to be accessed in a safe way, and the unsafe stack, which stores everything else. Such separation makes it much harder for an attacker to corrupt objects on the safe stack, including function pointers stored in spilled registers and return addresses. You can find more information about the safe stack, as well as other parts of or control-flow hijack protection technique in our OSDI paper on code-pointer integrity (http://dslab.epfl.ch/pubs/cpi.pdf) and our project website (http://levee.epfl.ch). The overhead of our implementation of the safe stack is very close to zero (0.01% on the Phoronix benchmarks). This is lower than the overhead of stack cookies, which are supported by LLVM and are commonly used today, yet the security guarantees of the safe stack are strictly stronger than stack cookies. In some cases, the safe stack improves performance due to better cache locality. Our current implementation of the safe stack is stable and robust, we used it to recompile multiple projects on Linux including Chromium, and we also recompiled the entire FreeBSD user-space system and more than 100 packages. We ran unit tests on the FreeBSD system and many of the packages and observed no errors caused by the safe stack. The safe stack is also fully binary compatible with non-instrumented code and can be applied to parts of a program selectively. This patch is our implementation of the safe stack on top of LLVM. The patches make the following changes: - Add the safestack function attribute, similar to the ssp, sspstrong and sspreq attributes. - Add the SafeStack instrumentation pass that applies the safe stack to all functions that have the safestack attribute. This pass moves all unsafe local variables to the unsafe stack with a separate stack pointer, whereas all safe variables remain on the regular stack that is managed by LLVM as usual. - Invoke the pass as the last stage before code generation (at the same time the existing cookie-based stack protector pass is invoked). - Add unit tests for the safe stack. Original patch by Volodymyr Kuznetsov and others at the Dependable Systems Lab at EPFL; updates and upstreaming by myself. Differential Revision: http://reviews.llvm.org/D6094 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239761 91177308-0d34-0410-b5e6-96231b3b80d8
1403 lines
45 KiB
C++
1403 lines
45 KiB
C++
//===-- Attributes.cpp - Implement AttributesList -------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// \file
|
|
// \brief This file implements the Attribute, AttributeImpl, AttrBuilder,
|
|
// AttributeSetImpl, and AttributeSet classes.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/IR/Attributes.h"
|
|
#include "AttributeImpl.h"
|
|
#include "LLVMContextImpl.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/IR/Type.h"
|
|
#include "llvm/Support/Atomic.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/Mutex.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <algorithm>
|
|
using namespace llvm;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Attribute Construction Methods
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
Attribute Attribute::get(LLVMContext &Context, Attribute::AttrKind Kind,
|
|
uint64_t Val) {
|
|
LLVMContextImpl *pImpl = Context.pImpl;
|
|
FoldingSetNodeID ID;
|
|
ID.AddInteger(Kind);
|
|
if (Val) ID.AddInteger(Val);
|
|
|
|
void *InsertPoint;
|
|
AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
|
|
|
|
if (!PA) {
|
|
// If we didn't find any existing attributes of the same shape then create a
|
|
// new one and insert it.
|
|
if (!Val)
|
|
PA = new EnumAttributeImpl(Kind);
|
|
else
|
|
PA = new IntAttributeImpl(Kind, Val);
|
|
pImpl->AttrsSet.InsertNode(PA, InsertPoint);
|
|
}
|
|
|
|
// Return the Attribute that we found or created.
|
|
return Attribute(PA);
|
|
}
|
|
|
|
Attribute Attribute::get(LLVMContext &Context, StringRef Kind, StringRef Val) {
|
|
LLVMContextImpl *pImpl = Context.pImpl;
|
|
FoldingSetNodeID ID;
|
|
ID.AddString(Kind);
|
|
if (!Val.empty()) ID.AddString(Val);
|
|
|
|
void *InsertPoint;
|
|
AttributeImpl *PA = pImpl->AttrsSet.FindNodeOrInsertPos(ID, InsertPoint);
|
|
|
|
if (!PA) {
|
|
// If we didn't find any existing attributes of the same shape then create a
|
|
// new one and insert it.
|
|
PA = new StringAttributeImpl(Kind, Val);
|
|
pImpl->AttrsSet.InsertNode(PA, InsertPoint);
|
|
}
|
|
|
|
// Return the Attribute that we found or created.
|
|
return Attribute(PA);
|
|
}
|
|
|
|
Attribute Attribute::getWithAlignment(LLVMContext &Context, uint64_t Align) {
|
|
assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
|
|
assert(Align <= 0x40000000 && "Alignment too large.");
|
|
return get(Context, Alignment, Align);
|
|
}
|
|
|
|
Attribute Attribute::getWithStackAlignment(LLVMContext &Context,
|
|
uint64_t Align) {
|
|
assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
|
|
assert(Align <= 0x100 && "Alignment too large.");
|
|
return get(Context, StackAlignment, Align);
|
|
}
|
|
|
|
Attribute Attribute::getWithDereferenceableBytes(LLVMContext &Context,
|
|
uint64_t Bytes) {
|
|
assert(Bytes && "Bytes must be non-zero.");
|
|
return get(Context, Dereferenceable, Bytes);
|
|
}
|
|
|
|
Attribute Attribute::getWithDereferenceableOrNullBytes(LLVMContext &Context,
|
|
uint64_t Bytes) {
|
|
assert(Bytes && "Bytes must be non-zero.");
|
|
return get(Context, DereferenceableOrNull, Bytes);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Attribute Accessor Methods
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
bool Attribute::isEnumAttribute() const {
|
|
return pImpl && pImpl->isEnumAttribute();
|
|
}
|
|
|
|
bool Attribute::isIntAttribute() const {
|
|
return pImpl && pImpl->isIntAttribute();
|
|
}
|
|
|
|
bool Attribute::isStringAttribute() const {
|
|
return pImpl && pImpl->isStringAttribute();
|
|
}
|
|
|
|
Attribute::AttrKind Attribute::getKindAsEnum() const {
|
|
if (!pImpl) return None;
|
|
assert((isEnumAttribute() || isIntAttribute()) &&
|
|
"Invalid attribute type to get the kind as an enum!");
|
|
return pImpl ? pImpl->getKindAsEnum() : None;
|
|
}
|
|
|
|
uint64_t Attribute::getValueAsInt() const {
|
|
if (!pImpl) return 0;
|
|
assert(isIntAttribute() &&
|
|
"Expected the attribute to be an integer attribute!");
|
|
return pImpl ? pImpl->getValueAsInt() : 0;
|
|
}
|
|
|
|
StringRef Attribute::getKindAsString() const {
|
|
if (!pImpl) return StringRef();
|
|
assert(isStringAttribute() &&
|
|
"Invalid attribute type to get the kind as a string!");
|
|
return pImpl ? pImpl->getKindAsString() : StringRef();
|
|
}
|
|
|
|
StringRef Attribute::getValueAsString() const {
|
|
if (!pImpl) return StringRef();
|
|
assert(isStringAttribute() &&
|
|
"Invalid attribute type to get the value as a string!");
|
|
return pImpl ? pImpl->getValueAsString() : StringRef();
|
|
}
|
|
|
|
bool Attribute::hasAttribute(AttrKind Kind) const {
|
|
return (pImpl && pImpl->hasAttribute(Kind)) || (!pImpl && Kind == None);
|
|
}
|
|
|
|
bool Attribute::hasAttribute(StringRef Kind) const {
|
|
if (!isStringAttribute()) return false;
|
|
return pImpl && pImpl->hasAttribute(Kind);
|
|
}
|
|
|
|
/// This returns the alignment field of an attribute as a byte alignment value.
|
|
unsigned Attribute::getAlignment() const {
|
|
assert(hasAttribute(Attribute::Alignment) &&
|
|
"Trying to get alignment from non-alignment attribute!");
|
|
return pImpl->getValueAsInt();
|
|
}
|
|
|
|
/// This returns the stack alignment field of an attribute as a byte alignment
|
|
/// value.
|
|
unsigned Attribute::getStackAlignment() const {
|
|
assert(hasAttribute(Attribute::StackAlignment) &&
|
|
"Trying to get alignment from non-alignment attribute!");
|
|
return pImpl->getValueAsInt();
|
|
}
|
|
|
|
/// This returns the number of dereferenceable bytes.
|
|
uint64_t Attribute::getDereferenceableBytes() const {
|
|
assert(hasAttribute(Attribute::Dereferenceable) &&
|
|
"Trying to get dereferenceable bytes from "
|
|
"non-dereferenceable attribute!");
|
|
return pImpl->getValueAsInt();
|
|
}
|
|
|
|
uint64_t Attribute::getDereferenceableOrNullBytes() const {
|
|
assert(hasAttribute(Attribute::DereferenceableOrNull) &&
|
|
"Trying to get dereferenceable bytes from "
|
|
"non-dereferenceable attribute!");
|
|
return pImpl->getValueAsInt();
|
|
}
|
|
|
|
std::string Attribute::getAsString(bool InAttrGrp) const {
|
|
if (!pImpl) return "";
|
|
|
|
if (hasAttribute(Attribute::SanitizeAddress))
|
|
return "sanitize_address";
|
|
if (hasAttribute(Attribute::AlwaysInline))
|
|
return "alwaysinline";
|
|
if (hasAttribute(Attribute::Builtin))
|
|
return "builtin";
|
|
if (hasAttribute(Attribute::ByVal))
|
|
return "byval";
|
|
if (hasAttribute(Attribute::Convergent))
|
|
return "convergent";
|
|
if (hasAttribute(Attribute::InAlloca))
|
|
return "inalloca";
|
|
if (hasAttribute(Attribute::InlineHint))
|
|
return "inlinehint";
|
|
if (hasAttribute(Attribute::InReg))
|
|
return "inreg";
|
|
if (hasAttribute(Attribute::JumpTable))
|
|
return "jumptable";
|
|
if (hasAttribute(Attribute::MinSize))
|
|
return "minsize";
|
|
if (hasAttribute(Attribute::Naked))
|
|
return "naked";
|
|
if (hasAttribute(Attribute::Nest))
|
|
return "nest";
|
|
if (hasAttribute(Attribute::NoAlias))
|
|
return "noalias";
|
|
if (hasAttribute(Attribute::NoBuiltin))
|
|
return "nobuiltin";
|
|
if (hasAttribute(Attribute::NoCapture))
|
|
return "nocapture";
|
|
if (hasAttribute(Attribute::NoDuplicate))
|
|
return "noduplicate";
|
|
if (hasAttribute(Attribute::NoImplicitFloat))
|
|
return "noimplicitfloat";
|
|
if (hasAttribute(Attribute::NoInline))
|
|
return "noinline";
|
|
if (hasAttribute(Attribute::NonLazyBind))
|
|
return "nonlazybind";
|
|
if (hasAttribute(Attribute::NonNull))
|
|
return "nonnull";
|
|
if (hasAttribute(Attribute::NoRedZone))
|
|
return "noredzone";
|
|
if (hasAttribute(Attribute::NoReturn))
|
|
return "noreturn";
|
|
if (hasAttribute(Attribute::NoUnwind))
|
|
return "nounwind";
|
|
if (hasAttribute(Attribute::OptimizeNone))
|
|
return "optnone";
|
|
if (hasAttribute(Attribute::OptimizeForSize))
|
|
return "optsize";
|
|
if (hasAttribute(Attribute::ReadNone))
|
|
return "readnone";
|
|
if (hasAttribute(Attribute::ReadOnly))
|
|
return "readonly";
|
|
if (hasAttribute(Attribute::Returned))
|
|
return "returned";
|
|
if (hasAttribute(Attribute::ReturnsTwice))
|
|
return "returns_twice";
|
|
if (hasAttribute(Attribute::SExt))
|
|
return "signext";
|
|
if (hasAttribute(Attribute::StackProtect))
|
|
return "ssp";
|
|
if (hasAttribute(Attribute::StackProtectReq))
|
|
return "sspreq";
|
|
if (hasAttribute(Attribute::StackProtectStrong))
|
|
return "sspstrong";
|
|
if (hasAttribute(Attribute::SafeStack))
|
|
return "safestack";
|
|
if (hasAttribute(Attribute::StructRet))
|
|
return "sret";
|
|
if (hasAttribute(Attribute::SanitizeThread))
|
|
return "sanitize_thread";
|
|
if (hasAttribute(Attribute::SanitizeMemory))
|
|
return "sanitize_memory";
|
|
if (hasAttribute(Attribute::UWTable))
|
|
return "uwtable";
|
|
if (hasAttribute(Attribute::ZExt))
|
|
return "zeroext";
|
|
if (hasAttribute(Attribute::Cold))
|
|
return "cold";
|
|
|
|
// FIXME: These should be output like this:
|
|
//
|
|
// align=4
|
|
// alignstack=8
|
|
//
|
|
if (hasAttribute(Attribute::Alignment)) {
|
|
std::string Result;
|
|
Result += "align";
|
|
Result += (InAttrGrp) ? "=" : " ";
|
|
Result += utostr(getValueAsInt());
|
|
return Result;
|
|
}
|
|
|
|
auto AttrWithBytesToString = [&](const char *Name) {
|
|
std::string Result;
|
|
Result += Name;
|
|
if (InAttrGrp) {
|
|
Result += "=";
|
|
Result += utostr(getValueAsInt());
|
|
} else {
|
|
Result += "(";
|
|
Result += utostr(getValueAsInt());
|
|
Result += ")";
|
|
}
|
|
return Result;
|
|
};
|
|
|
|
if (hasAttribute(Attribute::StackAlignment))
|
|
return AttrWithBytesToString("alignstack");
|
|
|
|
if (hasAttribute(Attribute::Dereferenceable))
|
|
return AttrWithBytesToString("dereferenceable");
|
|
|
|
if (hasAttribute(Attribute::DereferenceableOrNull))
|
|
return AttrWithBytesToString("dereferenceable_or_null");
|
|
|
|
// Convert target-dependent attributes to strings of the form:
|
|
//
|
|
// "kind"
|
|
// "kind" = "value"
|
|
//
|
|
if (isStringAttribute()) {
|
|
std::string Result;
|
|
Result += (Twine('"') + getKindAsString() + Twine('"')).str();
|
|
|
|
StringRef Val = pImpl->getValueAsString();
|
|
if (Val.empty()) return Result;
|
|
|
|
Result += ("=\"" + Val + Twine('"')).str();
|
|
return Result;
|
|
}
|
|
|
|
llvm_unreachable("Unknown attribute");
|
|
}
|
|
|
|
bool Attribute::operator<(Attribute A) const {
|
|
if (!pImpl && !A.pImpl) return false;
|
|
if (!pImpl) return true;
|
|
if (!A.pImpl) return false;
|
|
return *pImpl < *A.pImpl;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// AttributeImpl Definition
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Pin the vtables to this file.
|
|
AttributeImpl::~AttributeImpl() {}
|
|
void EnumAttributeImpl::anchor() {}
|
|
void IntAttributeImpl::anchor() {}
|
|
void StringAttributeImpl::anchor() {}
|
|
|
|
bool AttributeImpl::hasAttribute(Attribute::AttrKind A) const {
|
|
if (isStringAttribute()) return false;
|
|
return getKindAsEnum() == A;
|
|
}
|
|
|
|
bool AttributeImpl::hasAttribute(StringRef Kind) const {
|
|
if (!isStringAttribute()) return false;
|
|
return getKindAsString() == Kind;
|
|
}
|
|
|
|
Attribute::AttrKind AttributeImpl::getKindAsEnum() const {
|
|
assert(isEnumAttribute() || isIntAttribute());
|
|
return static_cast<const EnumAttributeImpl *>(this)->getEnumKind();
|
|
}
|
|
|
|
uint64_t AttributeImpl::getValueAsInt() const {
|
|
assert(isIntAttribute());
|
|
return static_cast<const IntAttributeImpl *>(this)->getValue();
|
|
}
|
|
|
|
StringRef AttributeImpl::getKindAsString() const {
|
|
assert(isStringAttribute());
|
|
return static_cast<const StringAttributeImpl *>(this)->getStringKind();
|
|
}
|
|
|
|
StringRef AttributeImpl::getValueAsString() const {
|
|
assert(isStringAttribute());
|
|
return static_cast<const StringAttributeImpl *>(this)->getStringValue();
|
|
}
|
|
|
|
bool AttributeImpl::operator<(const AttributeImpl &AI) const {
|
|
// This sorts the attributes with Attribute::AttrKinds coming first (sorted
|
|
// relative to their enum value) and then strings.
|
|
if (isEnumAttribute()) {
|
|
if (AI.isEnumAttribute()) return getKindAsEnum() < AI.getKindAsEnum();
|
|
if (AI.isIntAttribute()) return true;
|
|
if (AI.isStringAttribute()) return true;
|
|
}
|
|
|
|
if (isIntAttribute()) {
|
|
if (AI.isEnumAttribute()) return false;
|
|
if (AI.isIntAttribute()) return getValueAsInt() < AI.getValueAsInt();
|
|
if (AI.isStringAttribute()) return true;
|
|
}
|
|
|
|
if (AI.isEnumAttribute()) return false;
|
|
if (AI.isIntAttribute()) return false;
|
|
if (getKindAsString() == AI.getKindAsString())
|
|
return getValueAsString() < AI.getValueAsString();
|
|
return getKindAsString() < AI.getKindAsString();
|
|
}
|
|
|
|
uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) {
|
|
// FIXME: Remove this.
|
|
switch (Val) {
|
|
case Attribute::EndAttrKinds:
|
|
llvm_unreachable("Synthetic enumerators which should never get here");
|
|
|
|
case Attribute::None: return 0;
|
|
case Attribute::ZExt: return 1 << 0;
|
|
case Attribute::SExt: return 1 << 1;
|
|
case Attribute::NoReturn: return 1 << 2;
|
|
case Attribute::InReg: return 1 << 3;
|
|
case Attribute::StructRet: return 1 << 4;
|
|
case Attribute::NoUnwind: return 1 << 5;
|
|
case Attribute::NoAlias: return 1 << 6;
|
|
case Attribute::ByVal: return 1 << 7;
|
|
case Attribute::Nest: return 1 << 8;
|
|
case Attribute::ReadNone: return 1 << 9;
|
|
case Attribute::ReadOnly: return 1 << 10;
|
|
case Attribute::NoInline: return 1 << 11;
|
|
case Attribute::AlwaysInline: return 1 << 12;
|
|
case Attribute::OptimizeForSize: return 1 << 13;
|
|
case Attribute::StackProtect: return 1 << 14;
|
|
case Attribute::StackProtectReq: return 1 << 15;
|
|
case Attribute::Alignment: return 31 << 16;
|
|
case Attribute::NoCapture: return 1 << 21;
|
|
case Attribute::NoRedZone: return 1 << 22;
|
|
case Attribute::NoImplicitFloat: return 1 << 23;
|
|
case Attribute::Naked: return 1 << 24;
|
|
case Attribute::InlineHint: return 1 << 25;
|
|
case Attribute::StackAlignment: return 7 << 26;
|
|
case Attribute::ReturnsTwice: return 1 << 29;
|
|
case Attribute::UWTable: return 1 << 30;
|
|
case Attribute::NonLazyBind: return 1U << 31;
|
|
case Attribute::SanitizeAddress: return 1ULL << 32;
|
|
case Attribute::MinSize: return 1ULL << 33;
|
|
case Attribute::NoDuplicate: return 1ULL << 34;
|
|
case Attribute::StackProtectStrong: return 1ULL << 35;
|
|
case Attribute::SanitizeThread: return 1ULL << 36;
|
|
case Attribute::SanitizeMemory: return 1ULL << 37;
|
|
case Attribute::NoBuiltin: return 1ULL << 38;
|
|
case Attribute::Returned: return 1ULL << 39;
|
|
case Attribute::Cold: return 1ULL << 40;
|
|
case Attribute::Builtin: return 1ULL << 41;
|
|
case Attribute::OptimizeNone: return 1ULL << 42;
|
|
case Attribute::InAlloca: return 1ULL << 43;
|
|
case Attribute::NonNull: return 1ULL << 44;
|
|
case Attribute::JumpTable: return 1ULL << 45;
|
|
case Attribute::Convergent: return 1ULL << 46;
|
|
case Attribute::SafeStack: return 1ULL << 47;
|
|
case Attribute::Dereferenceable:
|
|
llvm_unreachable("dereferenceable attribute not supported in raw format");
|
|
break;
|
|
case Attribute::DereferenceableOrNull:
|
|
llvm_unreachable("dereferenceable_or_null attribute not supported in raw "
|
|
"format");
|
|
break;
|
|
}
|
|
llvm_unreachable("Unsupported attribute type");
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// AttributeSetNode Definition
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
AttributeSetNode *AttributeSetNode::get(LLVMContext &C,
|
|
ArrayRef<Attribute> Attrs) {
|
|
if (Attrs.empty())
|
|
return nullptr;
|
|
|
|
// Otherwise, build a key to look up the existing attributes.
|
|
LLVMContextImpl *pImpl = C.pImpl;
|
|
FoldingSetNodeID ID;
|
|
|
|
SmallVector<Attribute, 8> SortedAttrs(Attrs.begin(), Attrs.end());
|
|
array_pod_sort(SortedAttrs.begin(), SortedAttrs.end());
|
|
|
|
for (SmallVectorImpl<Attribute>::iterator I = SortedAttrs.begin(),
|
|
E = SortedAttrs.end(); I != E; ++I)
|
|
I->Profile(ID);
|
|
|
|
void *InsertPoint;
|
|
AttributeSetNode *PA =
|
|
pImpl->AttrsSetNodes.FindNodeOrInsertPos(ID, InsertPoint);
|
|
|
|
// If we didn't find any existing attributes of the same shape then create a
|
|
// new one and insert it.
|
|
if (!PA) {
|
|
// Coallocate entries after the AttributeSetNode itself.
|
|
void *Mem = ::operator new(sizeof(AttributeSetNode) +
|
|
sizeof(Attribute) * SortedAttrs.size());
|
|
PA = new (Mem) AttributeSetNode(SortedAttrs);
|
|
pImpl->AttrsSetNodes.InsertNode(PA, InsertPoint);
|
|
}
|
|
|
|
// Return the AttributesListNode that we found or created.
|
|
return PA;
|
|
}
|
|
|
|
bool AttributeSetNode::hasAttribute(Attribute::AttrKind Kind) const {
|
|
for (iterator I = begin(), E = end(); I != E; ++I)
|
|
if (I->hasAttribute(Kind))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
bool AttributeSetNode::hasAttribute(StringRef Kind) const {
|
|
for (iterator I = begin(), E = end(); I != E; ++I)
|
|
if (I->hasAttribute(Kind))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
Attribute AttributeSetNode::getAttribute(Attribute::AttrKind Kind) const {
|
|
for (iterator I = begin(), E = end(); I != E; ++I)
|
|
if (I->hasAttribute(Kind))
|
|
return *I;
|
|
return Attribute();
|
|
}
|
|
|
|
Attribute AttributeSetNode::getAttribute(StringRef Kind) const {
|
|
for (iterator I = begin(), E = end(); I != E; ++I)
|
|
if (I->hasAttribute(Kind))
|
|
return *I;
|
|
return Attribute();
|
|
}
|
|
|
|
unsigned AttributeSetNode::getAlignment() const {
|
|
for (iterator I = begin(), E = end(); I != E; ++I)
|
|
if (I->hasAttribute(Attribute::Alignment))
|
|
return I->getAlignment();
|
|
return 0;
|
|
}
|
|
|
|
unsigned AttributeSetNode::getStackAlignment() const {
|
|
for (iterator I = begin(), E = end(); I != E; ++I)
|
|
if (I->hasAttribute(Attribute::StackAlignment))
|
|
return I->getStackAlignment();
|
|
return 0;
|
|
}
|
|
|
|
uint64_t AttributeSetNode::getDereferenceableBytes() const {
|
|
for (iterator I = begin(), E = end(); I != E; ++I)
|
|
if (I->hasAttribute(Attribute::Dereferenceable))
|
|
return I->getDereferenceableBytes();
|
|
return 0;
|
|
}
|
|
|
|
uint64_t AttributeSetNode::getDereferenceableOrNullBytes() const {
|
|
for (iterator I = begin(), E = end(); I != E; ++I)
|
|
if (I->hasAttribute(Attribute::DereferenceableOrNull))
|
|
return I->getDereferenceableOrNullBytes();
|
|
return 0;
|
|
}
|
|
|
|
std::string AttributeSetNode::getAsString(bool InAttrGrp) const {
|
|
std::string Str;
|
|
for (iterator I = begin(), E = end(); I != E; ++I) {
|
|
if (I != begin())
|
|
Str += ' ';
|
|
Str += I->getAsString(InAttrGrp);
|
|
}
|
|
return Str;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// AttributeSetImpl Definition
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
uint64_t AttributeSetImpl::Raw(unsigned Index) const {
|
|
for (unsigned I = 0, E = getNumAttributes(); I != E; ++I) {
|
|
if (getSlotIndex(I) != Index) continue;
|
|
const AttributeSetNode *ASN = getSlotNode(I);
|
|
uint64_t Mask = 0;
|
|
|
|
for (AttributeSetNode::iterator II = ASN->begin(),
|
|
IE = ASN->end(); II != IE; ++II) {
|
|
Attribute Attr = *II;
|
|
|
|
// This cannot handle string attributes.
|
|
if (Attr.isStringAttribute()) continue;
|
|
|
|
Attribute::AttrKind Kind = Attr.getKindAsEnum();
|
|
|
|
if (Kind == Attribute::Alignment)
|
|
Mask |= (Log2_32(ASN->getAlignment()) + 1) << 16;
|
|
else if (Kind == Attribute::StackAlignment)
|
|
Mask |= (Log2_32(ASN->getStackAlignment()) + 1) << 26;
|
|
else if (Kind == Attribute::Dereferenceable)
|
|
llvm_unreachable("dereferenceable not supported in bit mask");
|
|
else
|
|
Mask |= AttributeImpl::getAttrMask(Kind);
|
|
}
|
|
|
|
return Mask;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void AttributeSetImpl::dump() const {
|
|
AttributeSet(const_cast<AttributeSetImpl *>(this)).dump();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// AttributeSet Construction and Mutation Methods
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
AttributeSet
|
|
AttributeSet::getImpl(LLVMContext &C,
|
|
ArrayRef<std::pair<unsigned, AttributeSetNode*> > Attrs) {
|
|
LLVMContextImpl *pImpl = C.pImpl;
|
|
FoldingSetNodeID ID;
|
|
AttributeSetImpl::Profile(ID, Attrs);
|
|
|
|
void *InsertPoint;
|
|
AttributeSetImpl *PA = pImpl->AttrsLists.FindNodeOrInsertPos(ID, InsertPoint);
|
|
|
|
// If we didn't find any existing attributes of the same shape then
|
|
// create a new one and insert it.
|
|
if (!PA) {
|
|
// Coallocate entries after the AttributeSetImpl itself.
|
|
void *Mem = ::operator new(sizeof(AttributeSetImpl) +
|
|
sizeof(std::pair<unsigned, AttributeSetNode *>) *
|
|
Attrs.size());
|
|
PA = new (Mem) AttributeSetImpl(C, Attrs);
|
|
pImpl->AttrsLists.InsertNode(PA, InsertPoint);
|
|
}
|
|
|
|
// Return the AttributesList that we found or created.
|
|
return AttributeSet(PA);
|
|
}
|
|
|
|
AttributeSet AttributeSet::get(LLVMContext &C,
|
|
ArrayRef<std::pair<unsigned, Attribute> > Attrs){
|
|
// If there are no attributes then return a null AttributesList pointer.
|
|
if (Attrs.empty())
|
|
return AttributeSet();
|
|
|
|
#ifndef NDEBUG
|
|
for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
|
|
assert((!i || Attrs[i-1].first <= Attrs[i].first) &&
|
|
"Misordered Attributes list!");
|
|
assert(!Attrs[i].second.hasAttribute(Attribute::None) &&
|
|
"Pointless attribute!");
|
|
}
|
|
#endif
|
|
|
|
// Create a vector if (unsigned, AttributeSetNode*) pairs from the attributes
|
|
// list.
|
|
SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrPairVec;
|
|
for (ArrayRef<std::pair<unsigned, Attribute> >::iterator I = Attrs.begin(),
|
|
E = Attrs.end(); I != E; ) {
|
|
unsigned Index = I->first;
|
|
SmallVector<Attribute, 4> AttrVec;
|
|
while (I != E && I->first == Index) {
|
|
AttrVec.push_back(I->second);
|
|
++I;
|
|
}
|
|
|
|
AttrPairVec.push_back(std::make_pair(Index,
|
|
AttributeSetNode::get(C, AttrVec)));
|
|
}
|
|
|
|
return getImpl(C, AttrPairVec);
|
|
}
|
|
|
|
AttributeSet AttributeSet::get(LLVMContext &C,
|
|
ArrayRef<std::pair<unsigned,
|
|
AttributeSetNode*> > Attrs) {
|
|
// If there are no attributes then return a null AttributesList pointer.
|
|
if (Attrs.empty())
|
|
return AttributeSet();
|
|
|
|
return getImpl(C, Attrs);
|
|
}
|
|
|
|
AttributeSet AttributeSet::get(LLVMContext &C, unsigned Index,
|
|
const AttrBuilder &B) {
|
|
if (!B.hasAttributes())
|
|
return AttributeSet();
|
|
|
|
// Add target-independent attributes.
|
|
SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
|
|
for (Attribute::AttrKind Kind = Attribute::None;
|
|
Kind != Attribute::EndAttrKinds; Kind = Attribute::AttrKind(Kind + 1)) {
|
|
if (!B.contains(Kind))
|
|
continue;
|
|
|
|
if (Kind == Attribute::Alignment)
|
|
Attrs.push_back(std::make_pair(Index, Attribute::
|
|
getWithAlignment(C, B.getAlignment())));
|
|
else if (Kind == Attribute::StackAlignment)
|
|
Attrs.push_back(std::make_pair(Index, Attribute::
|
|
getWithStackAlignment(C, B.getStackAlignment())));
|
|
else if (Kind == Attribute::Dereferenceable)
|
|
Attrs.push_back(std::make_pair(Index,
|
|
Attribute::getWithDereferenceableBytes(C,
|
|
B.getDereferenceableBytes())));
|
|
else if (Kind == Attribute::DereferenceableOrNull)
|
|
Attrs.push_back(
|
|
std::make_pair(Index, Attribute::getWithDereferenceableOrNullBytes(
|
|
C, B.getDereferenceableOrNullBytes())));
|
|
else
|
|
Attrs.push_back(std::make_pair(Index, Attribute::get(C, Kind)));
|
|
}
|
|
|
|
// Add target-dependent (string) attributes.
|
|
for (const AttrBuilder::td_type &TDA : B.td_attrs())
|
|
Attrs.push_back(
|
|
std::make_pair(Index, Attribute::get(C, TDA.first, TDA.second)));
|
|
|
|
return get(C, Attrs);
|
|
}
|
|
|
|
AttributeSet AttributeSet::get(LLVMContext &C, unsigned Index,
|
|
ArrayRef<Attribute::AttrKind> Kind) {
|
|
SmallVector<std::pair<unsigned, Attribute>, 8> Attrs;
|
|
for (ArrayRef<Attribute::AttrKind>::iterator I = Kind.begin(),
|
|
E = Kind.end(); I != E; ++I)
|
|
Attrs.push_back(std::make_pair(Index, Attribute::get(C, *I)));
|
|
return get(C, Attrs);
|
|
}
|
|
|
|
AttributeSet AttributeSet::get(LLVMContext &C, ArrayRef<AttributeSet> Attrs) {
|
|
if (Attrs.empty()) return AttributeSet();
|
|
if (Attrs.size() == 1) return Attrs[0];
|
|
|
|
SmallVector<std::pair<unsigned, AttributeSetNode*>, 8> AttrNodeVec;
|
|
AttributeSetImpl *A0 = Attrs[0].pImpl;
|
|
if (A0)
|
|
AttrNodeVec.append(A0->getNode(0), A0->getNode(A0->getNumAttributes()));
|
|
// Copy all attributes from Attrs into AttrNodeVec while keeping AttrNodeVec
|
|
// ordered by index. Because we know that each list in Attrs is ordered by
|
|
// index we only need to merge each successive list in rather than doing a
|
|
// full sort.
|
|
for (unsigned I = 1, E = Attrs.size(); I != E; ++I) {
|
|
AttributeSetImpl *AS = Attrs[I].pImpl;
|
|
if (!AS) continue;
|
|
SmallVector<std::pair<unsigned, AttributeSetNode *>, 8>::iterator
|
|
ANVI = AttrNodeVec.begin(), ANVE;
|
|
for (const AttributeSetImpl::IndexAttrPair
|
|
*AI = AS->getNode(0),
|
|
*AE = AS->getNode(AS->getNumAttributes());
|
|
AI != AE; ++AI) {
|
|
ANVE = AttrNodeVec.end();
|
|
while (ANVI != ANVE && ANVI->first <= AI->first)
|
|
++ANVI;
|
|
ANVI = AttrNodeVec.insert(ANVI, *AI) + 1;
|
|
}
|
|
}
|
|
|
|
return getImpl(C, AttrNodeVec);
|
|
}
|
|
|
|
AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Index,
|
|
Attribute::AttrKind Attr) const {
|
|
if (hasAttribute(Index, Attr)) return *this;
|
|
return addAttributes(C, Index, AttributeSet::get(C, Index, Attr));
|
|
}
|
|
|
|
AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Index,
|
|
StringRef Kind) const {
|
|
llvm::AttrBuilder B;
|
|
B.addAttribute(Kind);
|
|
return addAttributes(C, Index, AttributeSet::get(C, Index, B));
|
|
}
|
|
|
|
AttributeSet AttributeSet::addAttribute(LLVMContext &C, unsigned Index,
|
|
StringRef Kind, StringRef Value) const {
|
|
llvm::AttrBuilder B;
|
|
B.addAttribute(Kind, Value);
|
|
return addAttributes(C, Index, AttributeSet::get(C, Index, B));
|
|
}
|
|
|
|
AttributeSet AttributeSet::addAttributes(LLVMContext &C, unsigned Index,
|
|
AttributeSet Attrs) const {
|
|
if (!pImpl) return Attrs;
|
|
if (!Attrs.pImpl) return *this;
|
|
|
|
#ifndef NDEBUG
|
|
// FIXME it is not obvious how this should work for alignment. For now, say
|
|
// we can't change a known alignment.
|
|
unsigned OldAlign = getParamAlignment(Index);
|
|
unsigned NewAlign = Attrs.getParamAlignment(Index);
|
|
assert((!OldAlign || !NewAlign || OldAlign == NewAlign) &&
|
|
"Attempt to change alignment!");
|
|
#endif
|
|
|
|
// Add the attribute slots before the one we're trying to add.
|
|
SmallVector<AttributeSet, 4> AttrSet;
|
|
uint64_t NumAttrs = pImpl->getNumAttributes();
|
|
AttributeSet AS;
|
|
uint64_t LastIndex = 0;
|
|
for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
|
|
if (getSlotIndex(I) >= Index) {
|
|
if (getSlotIndex(I) == Index) AS = getSlotAttributes(LastIndex++);
|
|
break;
|
|
}
|
|
LastIndex = I + 1;
|
|
AttrSet.push_back(getSlotAttributes(I));
|
|
}
|
|
|
|
// Now add the attribute into the correct slot. There may already be an
|
|
// AttributeSet there.
|
|
AttrBuilder B(AS, Index);
|
|
|
|
for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
|
|
if (Attrs.getSlotIndex(I) == Index) {
|
|
for (AttributeSetImpl::iterator II = Attrs.pImpl->begin(I),
|
|
IE = Attrs.pImpl->end(I); II != IE; ++II)
|
|
B.addAttribute(*II);
|
|
break;
|
|
}
|
|
|
|
AttrSet.push_back(AttributeSet::get(C, Index, B));
|
|
|
|
// Add the remaining attribute slots.
|
|
for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
|
|
AttrSet.push_back(getSlotAttributes(I));
|
|
|
|
return get(C, AttrSet);
|
|
}
|
|
|
|
AttributeSet AttributeSet::removeAttribute(LLVMContext &C, unsigned Index,
|
|
Attribute::AttrKind Attr) const {
|
|
if (!hasAttribute(Index, Attr)) return *this;
|
|
return removeAttributes(C, Index, AttributeSet::get(C, Index, Attr));
|
|
}
|
|
|
|
AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Index,
|
|
AttributeSet Attrs) const {
|
|
if (!pImpl) return AttributeSet();
|
|
if (!Attrs.pImpl) return *this;
|
|
|
|
// FIXME it is not obvious how this should work for alignment.
|
|
// For now, say we can't pass in alignment, which no current use does.
|
|
assert(!Attrs.hasAttribute(Index, Attribute::Alignment) &&
|
|
"Attempt to change alignment!");
|
|
|
|
// Add the attribute slots before the one we're trying to add.
|
|
SmallVector<AttributeSet, 4> AttrSet;
|
|
uint64_t NumAttrs = pImpl->getNumAttributes();
|
|
AttributeSet AS;
|
|
uint64_t LastIndex = 0;
|
|
for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
|
|
if (getSlotIndex(I) >= Index) {
|
|
if (getSlotIndex(I) == Index) AS = getSlotAttributes(LastIndex++);
|
|
break;
|
|
}
|
|
LastIndex = I + 1;
|
|
AttrSet.push_back(getSlotAttributes(I));
|
|
}
|
|
|
|
// Now remove the attribute from the correct slot. There may already be an
|
|
// AttributeSet there.
|
|
AttrBuilder B(AS, Index);
|
|
|
|
for (unsigned I = 0, E = Attrs.pImpl->getNumAttributes(); I != E; ++I)
|
|
if (Attrs.getSlotIndex(I) == Index) {
|
|
B.removeAttributes(Attrs.pImpl->getSlotAttributes(I), Index);
|
|
break;
|
|
}
|
|
|
|
AttrSet.push_back(AttributeSet::get(C, Index, B));
|
|
|
|
// Add the remaining attribute slots.
|
|
for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
|
|
AttrSet.push_back(getSlotAttributes(I));
|
|
|
|
return get(C, AttrSet);
|
|
}
|
|
|
|
AttributeSet AttributeSet::removeAttributes(LLVMContext &C, unsigned Index,
|
|
const AttrBuilder &Attrs) const {
|
|
if (!pImpl) return AttributeSet();
|
|
|
|
// FIXME it is not obvious how this should work for alignment.
|
|
// For now, say we can't pass in alignment, which no current use does.
|
|
assert(!Attrs.hasAlignmentAttr() && "Attempt to change alignment!");
|
|
|
|
// Add the attribute slots before the one we're trying to add.
|
|
SmallVector<AttributeSet, 4> AttrSet;
|
|
uint64_t NumAttrs = pImpl->getNumAttributes();
|
|
AttributeSet AS;
|
|
uint64_t LastIndex = 0;
|
|
for (unsigned I = 0, E = NumAttrs; I != E; ++I) {
|
|
if (getSlotIndex(I) >= Index) {
|
|
if (getSlotIndex(I) == Index) AS = getSlotAttributes(LastIndex++);
|
|
break;
|
|
}
|
|
LastIndex = I + 1;
|
|
AttrSet.push_back(getSlotAttributes(I));
|
|
}
|
|
|
|
// Now remove the attribute from the correct slot. There may already be an
|
|
// AttributeSet there.
|
|
AttrBuilder B(AS, Index);
|
|
B.remove(Attrs);
|
|
|
|
AttrSet.push_back(AttributeSet::get(C, Index, B));
|
|
|
|
// Add the remaining attribute slots.
|
|
for (unsigned I = LastIndex, E = NumAttrs; I < E; ++I)
|
|
AttrSet.push_back(getSlotAttributes(I));
|
|
|
|
return get(C, AttrSet);
|
|
}
|
|
|
|
AttributeSet AttributeSet::addDereferenceableAttr(LLVMContext &C, unsigned Index,
|
|
uint64_t Bytes) const {
|
|
llvm::AttrBuilder B;
|
|
B.addDereferenceableAttr(Bytes);
|
|
return addAttributes(C, Index, AttributeSet::get(C, Index, B));
|
|
}
|
|
|
|
AttributeSet AttributeSet::addDereferenceableOrNullAttr(LLVMContext &C,
|
|
unsigned Index,
|
|
uint64_t Bytes) const {
|
|
llvm::AttrBuilder B;
|
|
B.addDereferenceableOrNullAttr(Bytes);
|
|
return addAttributes(C, Index, AttributeSet::get(C, Index, B));
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// AttributeSet Accessor Methods
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
LLVMContext &AttributeSet::getContext() const {
|
|
return pImpl->getContext();
|
|
}
|
|
|
|
AttributeSet AttributeSet::getParamAttributes(unsigned Index) const {
|
|
return pImpl && hasAttributes(Index) ?
|
|
AttributeSet::get(pImpl->getContext(),
|
|
ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
|
|
std::make_pair(Index, getAttributes(Index)))) :
|
|
AttributeSet();
|
|
}
|
|
|
|
AttributeSet AttributeSet::getRetAttributes() const {
|
|
return pImpl && hasAttributes(ReturnIndex) ?
|
|
AttributeSet::get(pImpl->getContext(),
|
|
ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
|
|
std::make_pair(ReturnIndex,
|
|
getAttributes(ReturnIndex)))) :
|
|
AttributeSet();
|
|
}
|
|
|
|
AttributeSet AttributeSet::getFnAttributes() const {
|
|
return pImpl && hasAttributes(FunctionIndex) ?
|
|
AttributeSet::get(pImpl->getContext(),
|
|
ArrayRef<std::pair<unsigned, AttributeSetNode*> >(
|
|
std::make_pair(FunctionIndex,
|
|
getAttributes(FunctionIndex)))) :
|
|
AttributeSet();
|
|
}
|
|
|
|
bool AttributeSet::hasAttribute(unsigned Index, Attribute::AttrKind Kind) const{
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->hasAttribute(Kind) : false;
|
|
}
|
|
|
|
bool AttributeSet::hasAttribute(unsigned Index, StringRef Kind) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->hasAttribute(Kind) : false;
|
|
}
|
|
|
|
bool AttributeSet::hasAttributes(unsigned Index) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->hasAttributes() : false;
|
|
}
|
|
|
|
/// \brief Return true if the specified attribute is set for at least one
|
|
/// parameter or for the return value.
|
|
bool AttributeSet::hasAttrSomewhere(Attribute::AttrKind Attr) const {
|
|
if (!pImpl) return false;
|
|
|
|
for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
|
|
for (AttributeSetImpl::iterator II = pImpl->begin(I),
|
|
IE = pImpl->end(I); II != IE; ++II)
|
|
if (II->hasAttribute(Attr))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
Attribute AttributeSet::getAttribute(unsigned Index,
|
|
Attribute::AttrKind Kind) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->getAttribute(Kind) : Attribute();
|
|
}
|
|
|
|
Attribute AttributeSet::getAttribute(unsigned Index,
|
|
StringRef Kind) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->getAttribute(Kind) : Attribute();
|
|
}
|
|
|
|
unsigned AttributeSet::getParamAlignment(unsigned Index) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->getAlignment() : 0;
|
|
}
|
|
|
|
unsigned AttributeSet::getStackAlignment(unsigned Index) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->getStackAlignment() : 0;
|
|
}
|
|
|
|
uint64_t AttributeSet::getDereferenceableBytes(unsigned Index) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->getDereferenceableBytes() : 0;
|
|
}
|
|
|
|
uint64_t AttributeSet::getDereferenceableOrNullBytes(unsigned Index) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->getDereferenceableOrNullBytes() : 0;
|
|
}
|
|
|
|
std::string AttributeSet::getAsString(unsigned Index,
|
|
bool InAttrGrp) const {
|
|
AttributeSetNode *ASN = getAttributes(Index);
|
|
return ASN ? ASN->getAsString(InAttrGrp) : std::string("");
|
|
}
|
|
|
|
/// \brief The attributes for the specified index are returned.
|
|
AttributeSetNode *AttributeSet::getAttributes(unsigned Index) const {
|
|
if (!pImpl) return nullptr;
|
|
|
|
// Loop through to find the attribute node we want.
|
|
for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I)
|
|
if (pImpl->getSlotIndex(I) == Index)
|
|
return pImpl->getSlotNode(I);
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
AttributeSet::iterator AttributeSet::begin(unsigned Slot) const {
|
|
if (!pImpl)
|
|
return ArrayRef<Attribute>().begin();
|
|
return pImpl->begin(Slot);
|
|
}
|
|
|
|
AttributeSet::iterator AttributeSet::end(unsigned Slot) const {
|
|
if (!pImpl)
|
|
return ArrayRef<Attribute>().end();
|
|
return pImpl->end(Slot);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// AttributeSet Introspection Methods
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// \brief Return the number of slots used in this attribute list. This is the
|
|
/// number of arguments that have an attribute set on them (including the
|
|
/// function itself).
|
|
unsigned AttributeSet::getNumSlots() const {
|
|
return pImpl ? pImpl->getNumAttributes() : 0;
|
|
}
|
|
|
|
unsigned AttributeSet::getSlotIndex(unsigned Slot) const {
|
|
assert(pImpl && Slot < pImpl->getNumAttributes() &&
|
|
"Slot # out of range!");
|
|
return pImpl->getSlotIndex(Slot);
|
|
}
|
|
|
|
AttributeSet AttributeSet::getSlotAttributes(unsigned Slot) const {
|
|
assert(pImpl && Slot < pImpl->getNumAttributes() &&
|
|
"Slot # out of range!");
|
|
return pImpl->getSlotAttributes(Slot);
|
|
}
|
|
|
|
uint64_t AttributeSet::Raw(unsigned Index) const {
|
|
// FIXME: Remove this.
|
|
return pImpl ? pImpl->Raw(Index) : 0;
|
|
}
|
|
|
|
void AttributeSet::dump() const {
|
|
dbgs() << "PAL[\n";
|
|
|
|
for (unsigned i = 0, e = getNumSlots(); i < e; ++i) {
|
|
uint64_t Index = getSlotIndex(i);
|
|
dbgs() << " { ";
|
|
if (Index == ~0U)
|
|
dbgs() << "~0U";
|
|
else
|
|
dbgs() << Index;
|
|
dbgs() << " => " << getAsString(Index) << " }\n";
|
|
}
|
|
|
|
dbgs() << "]\n";
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// AttrBuilder Method Implementations
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
AttrBuilder::AttrBuilder(AttributeSet AS, unsigned Index)
|
|
: Attrs(0), Alignment(0), StackAlignment(0), DerefBytes(0),
|
|
DerefOrNullBytes(0) {
|
|
AttributeSetImpl *pImpl = AS.pImpl;
|
|
if (!pImpl) return;
|
|
|
|
for (unsigned I = 0, E = pImpl->getNumAttributes(); I != E; ++I) {
|
|
if (pImpl->getSlotIndex(I) != Index) continue;
|
|
|
|
for (AttributeSetImpl::iterator II = pImpl->begin(I),
|
|
IE = pImpl->end(I); II != IE; ++II)
|
|
addAttribute(*II);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
void AttrBuilder::clear() {
|
|
Attrs.reset();
|
|
Alignment = StackAlignment = DerefBytes = DerefOrNullBytes = 0;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::addAttribute(Attribute::AttrKind Val) {
|
|
assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
|
|
assert(Val != Attribute::Alignment && Val != Attribute::StackAlignment &&
|
|
Val != Attribute::Dereferenceable &&
|
|
"Adding integer attribute without adding a value!");
|
|
Attrs[Val] = true;
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::addAttribute(Attribute Attr) {
|
|
if (Attr.isStringAttribute()) {
|
|
addAttribute(Attr.getKindAsString(), Attr.getValueAsString());
|
|
return *this;
|
|
}
|
|
|
|
Attribute::AttrKind Kind = Attr.getKindAsEnum();
|
|
Attrs[Kind] = true;
|
|
|
|
if (Kind == Attribute::Alignment)
|
|
Alignment = Attr.getAlignment();
|
|
else if (Kind == Attribute::StackAlignment)
|
|
StackAlignment = Attr.getStackAlignment();
|
|
else if (Kind == Attribute::Dereferenceable)
|
|
DerefBytes = Attr.getDereferenceableBytes();
|
|
else if (Kind == Attribute::DereferenceableOrNull)
|
|
DerefOrNullBytes = Attr.getDereferenceableOrNullBytes();
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::addAttribute(StringRef A, StringRef V) {
|
|
TargetDepAttrs[A] = V;
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::removeAttribute(Attribute::AttrKind Val) {
|
|
assert((unsigned)Val < Attribute::EndAttrKinds && "Attribute out of range!");
|
|
Attrs[Val] = false;
|
|
|
|
if (Val == Attribute::Alignment)
|
|
Alignment = 0;
|
|
else if (Val == Attribute::StackAlignment)
|
|
StackAlignment = 0;
|
|
else if (Val == Attribute::Dereferenceable)
|
|
DerefBytes = 0;
|
|
else if (Val == Attribute::DereferenceableOrNull)
|
|
DerefOrNullBytes = 0;
|
|
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::removeAttributes(AttributeSet A, uint64_t Index) {
|
|
unsigned Slot = ~0U;
|
|
for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
|
|
if (A.getSlotIndex(I) == Index) {
|
|
Slot = I;
|
|
break;
|
|
}
|
|
|
|
assert(Slot != ~0U && "Couldn't find index in AttributeSet!");
|
|
|
|
for (AttributeSet::iterator I = A.begin(Slot), E = A.end(Slot); I != E; ++I) {
|
|
Attribute Attr = *I;
|
|
if (Attr.isEnumAttribute() || Attr.isIntAttribute()) {
|
|
Attribute::AttrKind Kind = I->getKindAsEnum();
|
|
Attrs[Kind] = false;
|
|
|
|
if (Kind == Attribute::Alignment)
|
|
Alignment = 0;
|
|
else if (Kind == Attribute::StackAlignment)
|
|
StackAlignment = 0;
|
|
else if (Kind == Attribute::Dereferenceable)
|
|
DerefBytes = 0;
|
|
else if (Kind == Attribute::DereferenceableOrNull)
|
|
DerefOrNullBytes = 0;
|
|
} else {
|
|
assert(Attr.isStringAttribute() && "Invalid attribute type!");
|
|
std::map<std::string, std::string>::iterator
|
|
Iter = TargetDepAttrs.find(Attr.getKindAsString());
|
|
if (Iter != TargetDepAttrs.end())
|
|
TargetDepAttrs.erase(Iter);
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::removeAttribute(StringRef A) {
|
|
std::map<std::string, std::string>::iterator I = TargetDepAttrs.find(A);
|
|
if (I != TargetDepAttrs.end())
|
|
TargetDepAttrs.erase(I);
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::addAlignmentAttr(unsigned Align) {
|
|
if (Align == 0) return *this;
|
|
|
|
assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
|
|
assert(Align <= 0x40000000 && "Alignment too large.");
|
|
|
|
Attrs[Attribute::Alignment] = true;
|
|
Alignment = Align;
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::addStackAlignmentAttr(unsigned Align) {
|
|
// Default alignment, allow the target to define how to align it.
|
|
if (Align == 0) return *this;
|
|
|
|
assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
|
|
assert(Align <= 0x100 && "Alignment too large.");
|
|
|
|
Attrs[Attribute::StackAlignment] = true;
|
|
StackAlignment = Align;
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::addDereferenceableAttr(uint64_t Bytes) {
|
|
if (Bytes == 0) return *this;
|
|
|
|
Attrs[Attribute::Dereferenceable] = true;
|
|
DerefBytes = Bytes;
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::addDereferenceableOrNullAttr(uint64_t Bytes) {
|
|
if (Bytes == 0)
|
|
return *this;
|
|
|
|
Attrs[Attribute::DereferenceableOrNull] = true;
|
|
DerefOrNullBytes = Bytes;
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::merge(const AttrBuilder &B) {
|
|
// FIXME: What if both have alignments, but they don't match?!
|
|
if (!Alignment)
|
|
Alignment = B.Alignment;
|
|
|
|
if (!StackAlignment)
|
|
StackAlignment = B.StackAlignment;
|
|
|
|
if (!DerefBytes)
|
|
DerefBytes = B.DerefBytes;
|
|
|
|
if (!DerefOrNullBytes)
|
|
DerefOrNullBytes = B.DerefOrNullBytes;
|
|
|
|
Attrs |= B.Attrs;
|
|
|
|
for (auto I : B.td_attrs())
|
|
TargetDepAttrs[I.first] = I.second;
|
|
|
|
return *this;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::remove(const AttrBuilder &B) {
|
|
// FIXME: What if both have alignments, but they don't match?!
|
|
if (B.Alignment)
|
|
Alignment = 0;
|
|
|
|
if (B.StackAlignment)
|
|
StackAlignment = 0;
|
|
|
|
if (B.DerefBytes)
|
|
DerefBytes = 0;
|
|
|
|
if (B.DerefOrNullBytes)
|
|
DerefOrNullBytes = 0;
|
|
|
|
Attrs &= ~B.Attrs;
|
|
|
|
for (auto I : B.td_attrs())
|
|
TargetDepAttrs.erase(I.first);
|
|
|
|
return *this;
|
|
}
|
|
|
|
bool AttrBuilder::overlaps(const AttrBuilder &B) const {
|
|
// First check if any of the target independent attributes overlap.
|
|
if ((Attrs & B.Attrs).any())
|
|
return true;
|
|
|
|
// Then check if any target dependent ones do.
|
|
for (auto I : td_attrs())
|
|
if (B.contains(I.first))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AttrBuilder::contains(StringRef A) const {
|
|
return TargetDepAttrs.find(A) != TargetDepAttrs.end();
|
|
}
|
|
|
|
bool AttrBuilder::hasAttributes() const {
|
|
return !Attrs.none() || !TargetDepAttrs.empty();
|
|
}
|
|
|
|
bool AttrBuilder::hasAttributes(AttributeSet A, uint64_t Index) const {
|
|
unsigned Slot = ~0U;
|
|
for (unsigned I = 0, E = A.getNumSlots(); I != E; ++I)
|
|
if (A.getSlotIndex(I) == Index) {
|
|
Slot = I;
|
|
break;
|
|
}
|
|
|
|
assert(Slot != ~0U && "Couldn't find the index!");
|
|
|
|
for (AttributeSet::iterator I = A.begin(Slot), E = A.end(Slot);
|
|
I != E; ++I) {
|
|
Attribute Attr = *I;
|
|
if (Attr.isEnumAttribute() || Attr.isIntAttribute()) {
|
|
if (Attrs[I->getKindAsEnum()])
|
|
return true;
|
|
} else {
|
|
assert(Attr.isStringAttribute() && "Invalid attribute kind!");
|
|
return TargetDepAttrs.find(Attr.getKindAsString())!=TargetDepAttrs.end();
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AttrBuilder::hasAlignmentAttr() const {
|
|
return Alignment != 0;
|
|
}
|
|
|
|
bool AttrBuilder::operator==(const AttrBuilder &B) {
|
|
if (Attrs != B.Attrs)
|
|
return false;
|
|
|
|
for (td_const_iterator I = TargetDepAttrs.begin(),
|
|
E = TargetDepAttrs.end(); I != E; ++I)
|
|
if (B.TargetDepAttrs.find(I->first) == B.TargetDepAttrs.end())
|
|
return false;
|
|
|
|
return Alignment == B.Alignment && StackAlignment == B.StackAlignment &&
|
|
DerefBytes == B.DerefBytes;
|
|
}
|
|
|
|
AttrBuilder &AttrBuilder::addRawValue(uint64_t Val) {
|
|
// FIXME: Remove this in 4.0.
|
|
if (!Val) return *this;
|
|
|
|
for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
|
|
I = Attribute::AttrKind(I + 1)) {
|
|
if (I == Attribute::Dereferenceable ||
|
|
I == Attribute::DereferenceableOrNull)
|
|
continue;
|
|
if (uint64_t A = (Val & AttributeImpl::getAttrMask(I))) {
|
|
Attrs[I] = true;
|
|
|
|
if (I == Attribute::Alignment)
|
|
Alignment = 1ULL << ((A >> 16) - 1);
|
|
else if (I == Attribute::StackAlignment)
|
|
StackAlignment = 1ULL << ((A >> 26)-1);
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// AttributeFuncs Function Defintions
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// \brief Which attributes cannot be applied to a type.
|
|
AttrBuilder AttributeFuncs::typeIncompatible(const Type *Ty) {
|
|
AttrBuilder Incompatible;
|
|
|
|
if (!Ty->isIntegerTy())
|
|
// Attribute that only apply to integers.
|
|
Incompatible.addAttribute(Attribute::SExt)
|
|
.addAttribute(Attribute::ZExt);
|
|
|
|
if (!Ty->isPointerTy())
|
|
// Attribute that only apply to pointers.
|
|
Incompatible.addAttribute(Attribute::ByVal)
|
|
.addAttribute(Attribute::Nest)
|
|
.addAttribute(Attribute::NoAlias)
|
|
.addAttribute(Attribute::NoCapture)
|
|
.addAttribute(Attribute::NonNull)
|
|
.addDereferenceableAttr(1) // the int here is ignored
|
|
.addDereferenceableOrNullAttr(1) // the int here is ignored
|
|
.addAttribute(Attribute::ReadNone)
|
|
.addAttribute(Attribute::ReadOnly)
|
|
.addAttribute(Attribute::StructRet)
|
|
.addAttribute(Attribute::InAlloca);
|
|
|
|
return Incompatible;
|
|
}
|