qzdoom-gpl/tools/drawergen/ssa/ssa_scope.h

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2016-11-01 20:44:33 +00:00
/*
** SSA scope data
** Copyright (c) 2016 Magnus Norddahl
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
*/
#pragma once
class SSAInt;
class SSAScope
{
public:
SSAScope(llvm::LLVMContext *context, llvm::Module *module, llvm::IRBuilder<> *builder);
~SSAScope();
static llvm::LLVMContext &context();
static llvm::Module *module();
static llvm::IRBuilder<> &builder();
static llvm::Function *intrinsic(llvm::Intrinsic::ID id, llvm::ArrayRef<llvm::Type *> parameter_types = llvm::ArrayRef<llvm::Type*>());
static llvm::Value *alloc_stack(llvm::Type *type);
static llvm::Value *alloc_stack(llvm::Type *type, SSAInt size);
static llvm::MDNode *constant_scope_list();
static const std::string &hint();
static void set_hint(const std::string &hint);
private:
static SSAScope *instance;
llvm::LLVMContext *_context;
llvm::Module *_module;
llvm::IRBuilder<> *_builder;
llvm::MDNode *_constant_scope_domain;
llvm::MDNode *_constant_scope;
llvm::MDNode *_constant_scope_list;
std::string _hint;
};
class SSAScopeHint
{
public:
SSAScopeHint() : old_hint(SSAScope::hint()) { }
SSAScopeHint(const std::string &hint) : old_hint(SSAScope::hint()) { SSAScope::set_hint(hint); }
~SSAScopeHint() { SSAScope::set_hint(old_hint); }
void set(const std::string &hint) { SSAScope::set_hint(hint); }
void clear() { SSAScope::set_hint(old_hint); }
private:
std::string old_hint;
};