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

VarAction2: Infer that multiplying two bools results in bool

Browse Source
This commit is contained in:
Jonathan G Rennison
2022-08-28 09:53:09 +01:00
parent 7c78b22c48
commit 8c94ba0dc8
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/newgrf_optimiser.cpp
View File

@@ -1015,6 +1015,9 @@ void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSpecFeatu
adjust.adjust_flags |= DSGAF_JUMP_INS_HINT; adjust.adjust_flags |= DSGAF_JUMP_INS_HINT;
group->dsg_flags |= DSGF_CHECK_INSERT_JUMP; group->dsg_flags |= DSGF_CHECK_INSERT_JUMP;
} }
if (adjust.operation == DSGA_OP_MUL && (prev_inference & VA2AIF_ONE_OR_ZERO)) {
state.inference |= VA2AIF_SIGNED_NON_NEGATIVE | VA2AIF_ONE_OR_ZERO;
}
} }
if (adjust.operation == DSGA_OP_RST && adjust.type == DSGA_TYPE_MOD && adjust.divmod_val == 2) { if (adjust.operation == DSGA_OP_RST && adjust.type == DSGA_TYPE_MOD && adjust.divmod_val == 2) {
/* Non-negative value % 2 implies VA2AIF_ONE_OR_ZERO */ /* Non-negative value % 2 implies VA2AIF_ONE_OR_ZERO */
@@ -1330,6 +1333,9 @@ void OptimiseVarAction2Adjust(VarAction2OptimiseState &state, const GrfSpecFeatu
if ((prev_inference & VA2AIF_ONE_OR_ZERO) || (non_const_var_inference & VA2AIF_ONE_OR_ZERO)) { if ((prev_inference & VA2AIF_ONE_OR_ZERO) || (non_const_var_inference & VA2AIF_ONE_OR_ZERO)) {
state.inference |= VA2AIF_MUL_BOOL; state.inference |= VA2AIF_MUL_BOOL;
} }
if ((prev_inference & VA2AIF_ONE_OR_ZERO) && (non_const_var_inference & VA2AIF_ONE_OR_ZERO)) {
state.inference |= VA2AIF_SIGNED_NON_NEGATIVE | VA2AIF_ONE_OR_ZERO;
}
if (non_const_var_inference & VA2AIF_ONE_OR_ZERO) { if (non_const_var_inference & VA2AIF_ONE_OR_ZERO) {
adjust.adjust_flags |= DSGAF_JUMP_INS_HINT; adjust.adjust_flags |= DSGAF_JUMP_INS_HINT;
group->dsg_flags |= DSGF_CHECK_INSERT_JUMP; group->dsg_flags |= DSGF_CHECK_INSERT_JUMP;