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Fixed an omission in AdjustStackOffset. Use CS_IsBasicBlock in OptStackOps.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1450 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz 2002-10-06 19:03:12 +00:00
parent 9a62c92489
commit a0496ca53d
1 changed files with 23 additions and 7 deletions
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30
src/cc65/coptstop.c
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@ -94,14 +94,27 @@ static unsigned AdjustStackOffset (CodeSeg* S, unsigned Start, unsigned Stop,
CodeEntry* E = CS_GetEntry (S, I);
if (E->Use & REG_SP) {
CodeEntry* P;
int NeedCorrection = 0;
if ((E->Use & REG_SP) != 0) {
/* Check for some things that should not happen */
CHECK (E->AM == AM65_ZP_INDY || E->RI->In.RegY >= (short) Offs);
CHECK (strcmp (E->Arg, "sp") == 0);
/* We need to correct this one */
NeedCorrection = 1;
} else if (CE_IsCall (E, "ldaxysp")) {
/* We need to correct this one */
NeedCorrection = 1;
}
if (NeedCorrection) {
CodeEntry* P;
/* Get the code entry before this one. If it's a LDY, adjust the
* value.
*/
@ -632,8 +645,7 @@ unsigned OptStackOps (CodeSeg* S)
* It depends on the code between the two if we can handle/transform the
* sequence, so check this code for the following list of things:
*
* - there must not be a jump or conditional branch (this may
* get relaxed later).
* - the range must be a basic block (one entry, one exit)
* - there may not be accesses to local variables with unknown
* offsets (because we have to adjust these offsets).
* - no subroutine calls
@ -653,8 +665,7 @@ unsigned OptStackOps (CodeSeg* S)
if ((E->Info & OF_BRA) != 0 ||
((E->Use & REG_SP) != 0 &&
(E->AM != AM65_ZP_INDY || E->RI->In.RegY < 0)) ||
CE_HasLabel (E)) {
(E->AM != AM65_ZP_INDY || E->RI->In.RegY < 0))) {
/* All this stuff is not allowed in a sequence */
InSeq = 0;
@ -696,6 +707,11 @@ unsigned OptStackOps (CodeSeg* S)
}
}
/* Determine if we have a basic block */
if (PreCondOk) {
PreCondOk = CS_IsBasicBlock (S, Push, I);
}
/* If preconditions are ok, call the optimizer function */
if (PreCondOk) {