dave/openttd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

VarAction2: Only substitute cheap vars through temp storage in 1st pass

Browse Source
This commit is contained in:
Jonathan G Rennison
2022-06-07 20:22:57 +01:00
parent f54530b1b2
commit 0310692acf
1 changed files with 13 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/newgrf.cpp
View File

@@ -5700,6 +5700,18 @@ static bool IsExpensiveIndustryTileVariable(uint16 variable)
}
}
static bool IsVariableVeryCheap(uint16 variable, GrfSpecFeature feature)
{
switch (variable) {
case 0x0C:
case 0x10:
case 0x18:
case 0x1C:
return true;
}
return false;
}
static bool IsFeatureUsableForDSE(GrfSpecFeature feature)
{
return (feature != GSF_STATIONS);
@@ -5825,7 +5837,7 @@ static void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSp
if (store.inference & VA2AIF_HAVE_CONSTANT) {
adjust.variable = 0x1A;
adjust.and_mask &= (store.store_constant >> adjust.shift_num);
} else if ((store.inference & VA2AIF_SINGLE_LOAD) && (store.var_source.variable == 0x7D || IsFeatureUsableForDSE(feature))) {
} else if ((store.inference & VA2AIF_SINGLE_LOAD) && (store.var_source.variable == 0x7D || IsVariableVeryCheap(store.var_source.variable, feature))) {
if (adjust.type == DSGA_TYPE_NONE) {
if (adjust.and_mask == 0xFFFFFFFF || ((store.inference & VA2AIF_ONE_OR_ZERO) && (adjust.and_mask & 1))) {
adjust.type = store.var_source.type;