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VarAction2: Optimise unknown reads from 0x11 as constant 0

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Jonathan G Rennison 2023-02-22 19:32:26 +00:00
parent 6285b5823b
commit 439c1208d7
1 changed files with 6 additions and 0 deletions
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6
src/newgrf_optimiser.cpp
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@ -846,6 +846,12 @@ void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSpecFeatu
if (adjust.variable == 0x1C && !state.seen_procedure_call) { if (adjust.variable == 0x1C && !state.seen_procedure_call) {
group->dsg_flags |= DSGF_REQUIRES_VAR1C; group->dsg_flags |= DSGF_REQUIRES_VAR1C;
} }
if (adjust.variable == 0x11 || (adjust.variable == 0x7B && adjust.parameter == 0x11)) {
adjust.variable = 0x1A;
adjust.parameter = 0;
adjust.shift_num = 0;
adjust.and_mask = 0;
}
VarAction2AdjustInferenceFlags non_const_var_inference = VA2AIF_NONE; VarAction2AdjustInferenceFlags non_const_var_inference = VA2AIF_NONE;
int iteration = 32; int iteration = 32;