mirror of
https://github.com/ZDoom/qzdoom-gpl.git
synced 2024-11-26 13:51:35 +00:00
96 lines
2.9 KiB
C++
96 lines
2.9 KiB
C++
/*
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** SSA scope data
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** Copyright (c) 2016 Magnus Norddahl
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any damages
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** arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose,
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** including commercial applications, and to alter it and redistribute it
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** freely, subject to the following restrictions:
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**
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** 1. The origin of this software must not be misrepresented; you must not
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** claim that you wrote the original software. If you use this software
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** in a product, an acknowledgment in the product documentation would be
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** appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be
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** misrepresented as being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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**
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*/
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#include "precomp.h"
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#include "ssa_scope.h"
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#include "ssa_int.h"
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SSAScope::SSAScope(llvm::LLVMContext *context, llvm::Module *module, llvm::IRBuilder<> *builder)
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: _context(context), _module(module), _builder(builder)
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{
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instance = this;
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_constant_scope_domain = llvm::MDNode::get(SSAScope::context(), { llvm::MDString::get(SSAScope::context(), "ConstantScopeDomain") });
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_constant_scope = llvm::MDNode::getDistinct(SSAScope::context(), { _constant_scope_domain });
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_constant_scope_list = llvm::MDNode::get(SSAScope::context(), { _constant_scope });
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}
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SSAScope::~SSAScope()
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{
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instance = 0;
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}
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llvm::LLVMContext &SSAScope::context()
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{
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return *instance->_context;
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}
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llvm::Module *SSAScope::module()
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{
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return instance->_module;
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}
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llvm::IRBuilder<> &SSAScope::builder()
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{
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return *instance->_builder;
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}
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llvm::Function *SSAScope::intrinsic(llvm::Intrinsic::ID id, llvm::ArrayRef<llvm::Type *> parameter_types)
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{
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llvm::Function *func = module()->getFunction(llvm::Intrinsic::getName(id, parameter_types));
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if (func == 0)
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func = llvm::Function::Create(llvm::Intrinsic::getType(context(), id, parameter_types), llvm::Function::ExternalLinkage, llvm::Intrinsic::getName(id, parameter_types), module());
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return func;
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}
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llvm::Value *SSAScope::alloc_stack(llvm::Type *type)
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{
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return alloc_stack(type, SSAInt(1));
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}
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llvm::Value *SSAScope::alloc_stack(llvm::Type *type, SSAInt size)
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{
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// Allocas must be created at top of entry block for the PromoteMemoryToRegisterPass to work
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llvm::BasicBlock &entry = SSAScope::builder().GetInsertBlock()->getParent()->getEntryBlock();
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llvm::IRBuilder<> alloca_builder(&entry, entry.begin());
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return alloca_builder.CreateAlloca(type, size.v, hint());
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}
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llvm::MDNode *SSAScope::constant_scope_list()
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{
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return instance->_constant_scope_list;
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}
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const std::string &SSAScope::hint()
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{
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return instance->_hint;
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}
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void SSAScope::set_hint(const std::string &new_hint)
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{
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if (new_hint.empty())
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instance->_hint = "tmp";
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else
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instance->_hint = new_hint;
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}
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SSAScope *SSAScope::instance = 0;
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