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/* Source code for RCC-Legacy.
Copyright (C) 2026 Richard Qin
This file is part of RCC.
RCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
RCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with RCC; see the file LICENSE. If not see
<http://www.gnu.org/licenses/>. */
/// @file abi.cc
/// @brief elimsb - Eliminate ABI-level sub-word op variants (sb/ub/sh/uh for arg/par/ret).
///
/// See docs/abi.md for architectural notes.
#include "rcc/all.h"
namespace rcc {
void elimsb(Fn* fn) {
for (Blk* b = fn->start; b; b = b->link) {
Ins* ie = b->ins + b->nins;
for (Ins* i = b->ins; i < ie; ++i) {
if (isargbh(i->op)) {
i->op = Oarg;
} else if (isparbh(i->op)) {
i->op = Opar;
}
}
if (isretbh(b->jmp.type)) {
b->jmp.type = Jretw;
}
}
}
} // namespace rcc
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