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//===-- gen/attributes.h - Attribute abstractions ---------------*- C++ -*-===//
//
// LDC – the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
#ifndef LDC_GEN_ATTRIBUTES_H
#define LDC_GEN_ATTRIBUTES_H
#include "gen/llvm.h"
using LLAttribute = llvm::Attribute::AttrKind;
#if LDC_LLVM_VER >= 500
using LLAttributeSet = llvm::AttributeList;
#else
using LLAttributeSet = llvm::AttributeSet;
#endif
class AttrBuilder {
llvm::AttrBuilder builder;
public:
AttrBuilder() = default;
bool hasAttributes() const;
bool contains(LLAttribute attribute) const;
AttrBuilder &clear();
AttrBuilder &add(LLAttribute attribute);
AttrBuilder &remove(LLAttribute attribute);
AttrBuilder &merge(const AttrBuilder &other);
AttrBuilder &addAlignment(unsigned alignment);
AttrBuilder &addByVal(unsigned alignment);
AttrBuilder &addDereferenceable(unsigned size);
operator llvm::AttrBuilder &() { return builder; }
operator const llvm::AttrBuilder &() const { return builder; }
};
class AttrSet {
LLAttributeSet set;
AttrSet &add(unsigned index, const AttrBuilder &builder);
public:
AttrSet() = default;
AttrSet(const LLAttributeSet &nativeSet) : set(nativeSet) {}
AttrSet(const AttrSet &base, unsigned index, LLAttribute attribute);
#if LDC_LLVM_VER >= 500
static const unsigned FirstArgIndex = LLAttributeSet::FirstArgIndex;
#else
static const unsigned FirstArgIndex = 1;
#endif
static AttrSet
extractFunctionAndReturnAttributes(const llvm::Function *function);
AttrSet &addToParam(unsigned paramIndex, const AttrBuilder &builder) {
return add(paramIndex + FirstArgIndex, builder);
}
AttrSet &addToFunction(const AttrBuilder &builder) {
return add(LLAttributeSet::FunctionIndex, builder);
}
AttrSet &addToReturn(const AttrBuilder &builder) {
return add(LLAttributeSet::ReturnIndex, builder);
}
AttrSet &merge(const AttrSet &other);
operator LLAttributeSet &() { return set; }
operator const LLAttributeSet &() const { return set; }
};
#endif
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