namespace llvm {
+class LLVMContext;
class Type;
namespace Attribute {
} // namespace Attribute
+/// AttributeImpl - The internal representation of the Attributes class. This is
+/// uniquified.
+class AttributesImpl;
+
/// Attributes - A bitset of attributes.
class Attributes {
// Currently, we need less than 64 bits.
uint64_t Bits;
+
+ explicit Attributes(AttributesImpl *A);
public:
- Attributes() : Bits(0) { }
- explicit Attributes(uint64_t Val) : Bits(Val) { }
- /*implicit*/ Attributes(Attribute::AttrConst Val) : Bits(Val.v) { }
+ Attributes() : Bits(0) {}
+ explicit Attributes(uint64_t Val) : Bits(Val) {}
+ /*implicit*/ Attributes(Attribute::AttrConst Val) : Bits(Val.v) {}
+
+ class Builder {
+ friend class Attributes;
+ uint64_t Bits;
+ public:
+ void addZExtAttr() {
+ Bits |= Attribute::ZExt_i;
+ }
+ void addSExtAttr() {
+ Bits |= Attribute::SExt_i;
+ }
+ void addNoReturnAttr() {
+ Bits |= Attribute::NoReturn_i;
+ }
+ void addInRegAttr() {
+ Bits |= Attribute::InReg_i;
+ }
+ void addStructRetAttr() {
+ Bits |= Attribute::StructRet_i;
+ }
+ void addNoUnwindAttr() {
+ Bits |= Attribute::NoUnwind_i;
+ }
+ void addNoAliasAttr() {
+ Bits |= Attribute::NoAlias_i;
+ }
+ void addByValAttr() {
+ Bits |= Attribute::ByVal_i;
+ }
+ void addNestAttr() {
+ Bits |= Attribute::Nest_i;
+ }
+ void addReadNoneAttr() {
+ Bits |= Attribute::ReadNone_i;
+ }
+ void addReadOnlyAttr() {
+ Bits |= Attribute::ReadOnly_i;
+ }
+ void addNoInlineAttr() {
+ Bits |= Attribute::NoInline_i;
+ }
+ void addAlwaysInlineAttr() {
+ Bits |= Attribute::AlwaysInline_i;
+ }
+ void addOptimizeForSizeAttr() {
+ Bits |= Attribute::OptimizeForSize_i;
+ }
+ void addStackProtectAttr() {
+ Bits |= Attribute::StackProtect_i;
+ }
+ void addStackProtectReqAttr() {
+ Bits |= Attribute::StackProtectReq_i;
+ }
+ void addAlignmentAttr() {
+ Bits |= Attribute::Alignment_i;
+ }
+ void addNoCaptureAttr() {
+ Bits |= Attribute::NoCapture_i;
+ }
+ void addNoRedZoneAttr() {
+ Bits |= Attribute::NoRedZone_i;
+ }
+ void addNoImplicitFloatAttr() {
+ Bits |= Attribute::NoImplicitFloat_i;
+ }
+ void addNakedAttr() {
+ Bits |= Attribute::Naked_i;
+ }
+ void addInlineHintAttr() {
+ Bits |= Attribute::InlineHint_i;
+ }
+ void addReturnsTwiceAttr() {
+ Bits |= Attribute::ReturnsTwice_i;
+ }
+ void addStackAlignmentAttr() {
+ Bits |= Attribute::StackAlignment_i;
+ }
+ void addUWTableAttr() {
+ Bits |= Attribute::UWTable_i;
+ }
+ void addNonLazyBindAttr() {
+ Bits |= Attribute::NonLazyBind_i;
+ }
+ void addAddressSafetyAttr() {
+ Bits |= Attribute::AddressSafety_i;
+ }
+ void addAlignmentAttr(unsigned Align) {
+ if (Align == 0) return;
+ assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
+ assert(Align <= 0x40000000 && "Alignment too large.");
+ Bits |= (Log2_32(Align) + 1) << 16;
+ }
+ void addStackAlignment(unsigned Align) {
+ // Default alignment, allow the target to define how to align it.
+ if (Align == 0) return;
+
+ assert(isPowerOf2_32(Align) && "Alignment must be a power of two.");
+ assert(Align <= 0x100 && "Alignment too large.");
+ Bits |= (Log2_32(Align) + 1) << 26;
+ }
+ };
+
+ /// get - Return a uniquified Attributes object. This takes the uniquified
+ /// value from the Builder and wraps it in the Attributes class.
+ static Attributes get(LLVMContext &Context, Builder &B);
// Attribute query methods.
// FIXME: StackAlignment & Alignment attributes have no predicate methods.
return Bits & Attribute::AddressSafety_i;
}
- uint64_t getRawAlignment() const {
- return Bits & Attribute::Alignment_i;
- }
- uint64_t getRawStackAlignment() const {
- return Bits & Attribute::StackAlignment_i;
- }
-
/// This returns the alignment field of an attribute as a byte alignment
/// value.
unsigned getAlignment() const {
if (!hasAlignmentAttr())
return 0;
-
- return 1U << ((getRawAlignment() >> 16) - 1);
+ return 1U << (((Bits & Attribute::Alignment_i) >> 16) - 1);
}
/// This returns the stack alignment field of an attribute as a byte alignment
unsigned getStackAlignment() const {
if (!hasStackAlignmentAttr())
return 0;
-
- return 1U << ((getRawStackAlignment() >> 26) - 1);
- }
-
- /// This turns an int alignment (a power of 2, normally) into the form used
- /// internally in Attributes.
- static Attributes constructAlignmentFromInt(unsigned i) {
- // Default alignment, allow the target to define how to align it.
- if (i == 0)
- return Attribute::None;
-
- assert(isPowerOf2_32(i) && "Alignment must be a power of two.");
- assert(i <= 0x40000000 && "Alignment too large.");
- return Attributes((Log2_32(i)+1) << 16);
- }
-
- /// This turns an int stack alignment (which must be a power of 2) into the
- /// form used internally in Attributes.
- static Attributes constructStackAlignmentFromInt(unsigned i) {
- // Default alignment, allow the target to define how to align it.
- if (i == 0)
- return Attribute::None;
-
- assert(isPowerOf2_32(i) && "Alignment must be a power of two.");
- assert(i <= 0x100 && "Alignment too large.");
- return Attributes((Log2_32(i)+1) << 26);
+ return 1U << (((Bits & Attribute::StackAlignment_i) >> 26) - 1);
}
// This is a "safe bool() operator".
Attributes operator ~ () const { return Attributes(~Bits); }
uint64_t Raw() const { return Bits; }
- /// The set of Attributes set in Attributes is converted to a string of
- /// equivalent mnemonics. This is, presumably, for writing out the mnemonics
- /// for the assembly writer.
- /// @brief Convert attribute bits to text
- std::string getAsString() const;
+ /// This turns an int alignment (a power of 2, normally) into the form used
+ /// internally in Attributes.
+ static Attributes constructAlignmentFromInt(unsigned i) {
+ // Default alignment, allow the target to define how to align it.
+ if (i == 0)
+ return Attribute::None;
+
+ assert(isPowerOf2_32(i) && "Alignment must be a power of two.");
+ assert(i <= 0x40000000 && "Alignment too large.");
+ return Attributes((Log2_32(i)+1) << 16);
+ }
+
+ /// This turns an int stack alignment (which must be a power of 2) into the
+ /// form used internally in Attributes.
+ static Attributes constructStackAlignmentFromInt(unsigned i) {
+ // Default alignment, allow the target to define how to align it.
+ if (i == 0)
+ return Attribute::None;
+
+ assert(isPowerOf2_32(i) && "Alignment must be a power of two.");
+ assert(i <= 0x100 && "Alignment too large.");
+ return Attributes((Log2_32(i)+1) << 26);
+ }
/// @brief Which attributes cannot be applied to a type.
static Attributes typeIncompatible(Type *Ty);
// bits.
uint64_t EncodedAttrs = Attrs.Raw() & 0xffff;
if (Attrs.hasAlignmentAttr())
- EncodedAttrs |= (1ull << 16) <<
- ((Attrs.getRawAlignment() - 1) >> 16);
- EncodedAttrs |= (Attrs.Raw() & (0xfffull << 21)) << 11;
-
+ EncodedAttrs |= (1ULL << 16) <<
+ (((Attrs.Bits & Attribute::Alignment_i) - 1) >> 16);
+ EncodedAttrs |= (Attrs.Raw() & (0xfffULL << 21)) << 11;
return EncodedAttrs;
}
static Attributes decodeLLVMAttributesForBitcode(uint64_t EncodedAttrs) {
// The alignment is stored as a 16-bit raw value from bits 31--16. We shift
// the bits above 31 down by 11 bits.
- unsigned Alignment = (EncodedAttrs & (0xffffull << 16)) >> 16;
+ unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
assert((!Alignment || isPowerOf2_32(Alignment)) &&
"Alignment must be a power of two.");
Attributes Attrs(EncodedAttrs & 0xffff);
if (Alignment)
Attrs |= Attributes::constructAlignmentFromInt(Alignment);
- Attrs |= Attributes((EncodedAttrs & (0xfffull << 32)) >> 11);
-
+ Attrs |= Attributes((EncodedAttrs & (0xfffULL << 32)) >> 11);
return Attrs;
}
+
+ /// The set of Attributes set in Attributes is converted to a string of
+ /// equivalent mnemonics. This is, presumably, for writing out the mnemonics
+ /// for the assembly writer.
+ /// @brief Convert attribute bits to text
+ std::string getAsString() const;
};
/// This is just a pair of values to associate a set of attributes
/// with an index.
struct AttributeWithIndex {
- Attributes Attrs; ///< The attributes that are set, or'd together.
- unsigned Index; ///< Index of the parameter for which the attributes apply.
- ///< Index 0 is used for return value attributes.
- ///< Index ~0U is used for function attributes.
+ Attributes Attrs; ///< The attributes that are set, or'd together.
+ unsigned Index; ///< Index of the parameter for which the attributes apply.
+ ///< Index 0 is used for return value attributes.
+ ///< Index ~0U is used for function attributes.
static AttributeWithIndex get(unsigned Idx, Attributes Attrs) {
AttributeWithIndex P;
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