mirror of
https://github.com/ZDoom/qzdoom.git
synced 2024-11-11 15:22:16 +00:00
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
/*
|
|
** SSA phi node
|
|
** 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
|
|
|
|
#include "ssa_scope.h"
|
|
|
|
class SSAIfBlock;
|
|
|
|
template <typename SSAVariable>
|
|
class SSAPhi
|
|
{
|
|
public:
|
|
void add_incoming(SSAVariable var)
|
|
{
|
|
incoming.push_back(Incoming(var.v, SSAScope::builder().GetInsertBlock()));
|
|
}
|
|
|
|
SSAVariable create()
|
|
{
|
|
llvm::PHINode *phi_node = SSAScope::builder().CreatePHI(SSAVariable::llvm_type(), (unsigned int)incoming.size(), SSAScope::hint());
|
|
for (size_t i = 0; i < incoming.size(); i++)
|
|
phi_node->addIncoming(incoming[i].v, incoming[i].bb);
|
|
return SSAVariable::from_llvm(phi_node);
|
|
}
|
|
|
|
private:
|
|
struct Incoming
|
|
{
|
|
Incoming(llvm::Value *v, llvm::BasicBlock *bb) : v(v), bb(bb) { }
|
|
llvm::Value *v;
|
|
llvm::BasicBlock *bb;
|
|
};
|
|
std::vector<Incoming> incoming;
|
|
};
|