mirror of
https://github.com/ZDoom/qzdoom-gpl.git
synced 2024-11-26 13:51:35 +00:00
67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
/*
|
|
** LLVM if statement branching
|
|
** 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_bool.h"
|
|
#include "ssa_phi.h"
|
|
|
|
class SSAIfBlock
|
|
{
|
|
public:
|
|
SSAIfBlock();
|
|
void if_block(SSABool true_condition);
|
|
void else_block();
|
|
void end_block();
|
|
void end_retvoid();
|
|
|
|
private:
|
|
llvm::BasicBlock *if_basic_block;
|
|
llvm::BasicBlock *else_basic_block;
|
|
llvm::BasicBlock *end_basic_block;
|
|
};
|
|
|
|
template<typename T>
|
|
T ssa_min(T a, T b)
|
|
{
|
|
SSAPhi<T> phi;
|
|
SSAIfBlock if_block;
|
|
if_block.if_block(a <= b);
|
|
phi.add_incoming(a);
|
|
if_block.else_block();
|
|
phi.add_incoming(b);
|
|
if_block.end_block();
|
|
return phi.create();
|
|
}
|
|
|
|
template<typename T>
|
|
T ssa_max(T a, T b)
|
|
{
|
|
SSAPhi<T> phi;
|
|
SSAIfBlock if_block;
|
|
if_block.if_block(a >= b);
|
|
phi.add_incoming(a);
|
|
if_block.else_block();
|
|
phi.add_incoming(b);
|
|
if_block.end_block();
|
|
return phi.create();
|
|
}
|