mirror of https://github.com/ZDoom/qzdoom.git
68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
/*
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** LLVM if statement branching
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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_bool.h"
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#include "ssa_phi.h"
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class SSAIfBlock
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{
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public:
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SSAIfBlock();
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void if_block(SSABool true_condition);
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void else_block();
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void end_block();
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void end_retvoid();
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private:
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llvm::BasicBlock *if_basic_block;
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llvm::BasicBlock *else_basic_block;
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llvm::BasicBlock *end_basic_block;
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};
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template<typename T>
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T ssa_min(T a, T b)
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{
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SSAPhi<T> phi;
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SSAIfBlock if_block;
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if_block.if_block(a <= b);
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phi.add_incoming(a);
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if_block.else_block();
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phi.add_incoming(b);
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if_block.end_block();
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return phi.create();
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}
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template<typename T>
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T ssa_max(T a, T b)
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{
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SSAPhi<T> phi;
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SSAIfBlock if_block;
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if_block.if_block(a >= b);
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phi.add_incoming(a);
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if_block.else_block();
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phi.add_incoming(b);
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if_block.end_block();
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return phi.create();
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}
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