mirror of https://github.com/ZDoom/gzdoom.git
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
/*
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** SSA phi node
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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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#pragma once
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#include "ssa_scope.h"
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class SSAIfBlock;
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template <typename SSAVariable>
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class SSAPhi
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{
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public:
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void add_incoming(SSAVariable var)
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{
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incoming.push_back(Incoming(var.v, SSAScope::builder().GetInsertBlock()));
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}
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SSAVariable create()
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{
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llvm::PHINode *phi_node = SSAScope::builder().CreatePHI(SSAVariable::llvm_type(), (unsigned int)incoming.size(), SSAScope::hint());
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for (size_t i = 0; i < incoming.size(); i++)
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phi_node->addIncoming(incoming[i].v, incoming[i].bb);
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return SSAVariable::from_llvm(phi_node);
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}
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private:
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struct Incoming
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{
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Incoming(llvm::Value *v, llvm::BasicBlock *bb) : v(v), bb(bb) { }
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llvm::Value *v;
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llvm::BasicBlock *bb;
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};
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std::vector<Incoming> incoming;
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};
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