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Fixed a problem with the optimizations for shifts.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@5783 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2012-07-12 21:12:50 +00:00
parent 18f22506ba
commit eef430e45a
1 changed files with 17 additions and 8 deletions
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25
src/cc65/coptstop.c
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@ -840,13 +840,6 @@ static unsigned Opt_tosshift (StackOpData* D, const char* Name)
/* Store the value into the zeropage instead of pushing it */
ReplacePushByStore (D);
/* Inline the shift */
D->IP = D->OpIndex+1;
/* tay */
X = NewCodeEntry (OP65_TAY, AM65_IMP, 0, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
/* If the lhs is direct (but not stack relative), we can just reload the
* data later.
*/
@ -856,6 +849,13 @@ static unsigned Opt_tosshift (StackOpData* D, const char* Name)
CodeEntry* LoadX = D->Lhs.X.LoadEntry;
CodeEntry* LoadA = D->Lhs.A.LoadEntry;
/* Inline the shift */
D->IP = D->OpIndex+1;
/* tay */
X = NewCodeEntry (OP65_TAY, AM65_IMP, 0, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
/* lda */
X = NewCodeEntry (OP65_LDA, LoadA->AM, LoadA->Arg, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
@ -874,6 +874,15 @@ static unsigned Opt_tosshift (StackOpData* D, const char* Name)
AddStoreX (D);
AddStoreA (D);
/* Be sure to setup IP after adding the stores, otherwise it will get
* messed up.
*/
D->IP = D->OpIndex+1;
/* tay */
X = NewCodeEntry (OP65_TAY, AM65_IMP, 0, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
/* lda zp */
X = NewCodeEntry (OP65_LDA, AM65_ZP, D->ZPLo, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
@ -888,7 +897,7 @@ static unsigned Opt_tosshift (StackOpData* D, const char* Name)
X = NewCodeEntry (OP65_JSR, AM65_ABS, Name, 0, D->OpEntry->LI);
InsertEntry (D, X, D->IP++);
/* Remove the push and the call to the tossubax function */
/* Remove the push and the call to the shift function */
RemoveRemainders (D);
/* We changed the sequence */