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Just keep Lhs loads in OptStackOps and leave them to OptUnusedLoads,

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whilst Rhs loads must be removed for OptStackOps to work right.
Fixed Issue #167 as well as similar issues with tosshift.
This commit is contained in:
acqn 2019-12-31 16:06:52 +08:00 committed by Oliver Schmidt
parent 1c2edc5434
commit a7a8426a90
1 changed files with 8 additions and 12 deletions
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20
src/cc65/coptstop.c
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@ -792,10 +792,6 @@ static unsigned Opt_toseqax_tosneax (StackOpData* D, const char* BoolTransformer
X = NewCodeEntry (OP65_CMP, LoadA->AM, LoadA->Arg, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
/* Lhs load entries can be removed */
D->Lhs.X.Flags |= LI_REMOVE;
D->Lhs.A.Flags |= LI_REMOVE;
} else if ((D->Rhs.A.Flags & (LI_DIRECT | LI_RELOAD_Y)) == LI_DIRECT &&
(D->Rhs.X.Flags & (LI_DIRECT | LI_RELOAD_Y)) == LI_DIRECT) {
@ -816,9 +812,13 @@ static unsigned Opt_toseqax_tosneax (StackOpData* D, const char* BoolTransformer
X = NewCodeEntry (OP65_CMP, LoadA->AM, LoadA->Arg, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
/* Rhs load entries can be removed */
D->Rhs.X.Flags |= LI_REMOVE;
D->Rhs.A.Flags |= LI_REMOVE;
/* Rhs load entries must be removed if they are placed after the push */
if (D->Rhs.X.LoadIndex > D->PushIndex) {
D->Rhs.X.Flags |= LI_REMOVE;
}
if (D->Rhs.A.LoadIndex > D->PushIndex) {
D->Rhs.A.Flags |= LI_REMOVE;
}
} else if ((D->Rhs.A.Flags & LI_DIRECT) != 0 &&
(D->Rhs.X.Flags & LI_DIRECT) != 0) {
@ -897,11 +897,7 @@ static unsigned Opt_tosshift (StackOpData* D, const char* Name)
/* ldx */
X = NewCodeEntry (OP65_LDX, LoadX->AM, LoadX->Arg, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
/* Lhs load entries can be removed */
D->Lhs.X.Flags |= LI_REMOVE;
D->Lhs.A.Flags |= LI_REMOVE;
} else {
/* Save lhs into zeropage and reload later */