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VarAction2: DSE: Allow setting skip on zero flag on skippable procedures

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Jonathan G Rennison
2022-08-10 19:39:12 +01:00
parent 4601a1bfc6
commit c58b94c376
1 changed files with 5 additions and 0 deletions
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5
src/newgrf_optimiser.cpp
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@@ -2593,6 +2593,11 @@ static std::bitset<256> HandleVarAction2DeadStoreElimination(DeterministicSprite
} }
continue; continue;
} }
if (!anno->unskippable && anno->special_register_mask == 0 && IsEvalAdjustWithZeroLastValueAlwaysZero(adjust.operation)) {
/* No stores made in the procedure are required and there are no special stores or other features which make it unskippable.
* Set DSGAF_SKIP_ON_ZERO if appropriate */
group->adjusts[i].adjust_flags |= DSGAF_SKIP_ON_ZERO;
}
} }
need_var1C = false; need_var1C = false;