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VarAction2: Elide group ranges as cast to bool when result is already bool

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This commit is contained in:
Jonathan G Rennison
2022-08-18 19:25:33 +01:00
parent b04d1295cd
commit e335c86e77
1 changed files with 9 additions and 0 deletions
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9
src/newgrf_optimiser.cpp
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@@ -2233,6 +2233,15 @@ void OptimiseVarAction2DeterministicSpriteGroup(VarAction2OptimiseState &state,
group->error_group = target;
group->ranges.clear();
}
if (!HasGrfOptimiserFlag(NGOF_NO_OPT_VARACT2_GROUP_PRUNE) && (state.inference & VA2AIF_ONE_OR_ZERO) && !group->calculated_result && group->ranges.size() == 1) {
/* See if sprite group uses ranges as a cast to bool, when the result is already bool */
const DeterministicSpriteGroupRange &r0 = group->ranges[0];
if (r0.low == 0 && r0.high == 0 && r0.group != nullptr && r0.group->type == SGT_CALLBACK && static_cast<const CallbackResultSpriteGroup*>(r0.group)->result == 0 &&
group->default_group != nullptr && group->default_group->type == SGT_CALLBACK && static_cast<const CallbackResultSpriteGroup*>(group->default_group)->result == 1) {
group->calculated_result = true;
group->ranges.clear();
}
}
std::bitset<256> bits;
std::bitset<256> pending_bits;