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Optimize multiple incax* and incax*/ldaxi

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- Group multiple calls to incax* and decax* into a single one
- Replace incaxN/jsr ldaxi with ldy #N+1/jsr ldaxidx

Fixes #2055
This commit is contained in:
Colin Leroy-Mira
2025-07-06 18:40:04 +02:00
parent facf7b2a0c
commit 20a9db757d
4 changed files with 121 additions and 17 deletions
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5
src/cc65/codeopt.c
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@@ -113,6 +113,8 @@ static OptFunc DOptAdd3 = { OptAdd3, "OptAdd3", 65, 0,
static OptFunc DOptAdd4 = { OptAdd4, "OptAdd4", 90, 0, 0, 0, 0, 0 };
static OptFunc DOptAdd5 = { OptAdd5, "OptAdd5", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptAdd6 = { OptAdd6, "OptAdd6", 40, 0, 0, 0, 0, 0 };
static OptFunc DOptAXLoad = { OptAXLoad, "OptAXLoad", 50, 0, 0, 0, 0, 0 };
static OptFunc DOptAXOps = { OptAXOps, "OptAXOps", 50, 0, 0, 0, 0, 0 };
static OptFunc DOptBNegA1 = { OptBNegA1, "OptBNegA1", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptBNegA2 = { OptBNegA2, "OptBNegA2", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptBNegAX1 = { OptBNegAX1, "OptBNegAX1", 100, 0, 0, 0, 0, 0 };
@@ -236,6 +238,7 @@ static OptFunc* OptFuncs[] = {
&DOptAdd4,
&DOptAdd5,
&DOptAdd6,
&DOptAXOps,
&DOptBNegA1,
&DOptBNegA2,
&DOptBNegAX1,
@@ -629,6 +632,7 @@ static unsigned RunOptGroup1 (CodeSeg* S)
Changes += RunOptFunc (S, &DOptGotoSPAdj, 1);
Changes += RunOptFunc (S, &DOptStackPtrOps, 5);
Changes += RunOptFunc (S, &DOptAXOps, 5);
Changes += RunOptFunc (S, &DOptAdd3, 1); /* Before OptPtrLoad5! */
Changes += RunOptFunc (S, &DOptPtrStore1, 1);
Changes += RunOptFunc (S, &DOptPtrStore2, 1);
@@ -871,6 +875,7 @@ static unsigned RunOptGroup7 (CodeSeg* S)
** may have opened new oportunities.
*/
Changes += RunOptFunc (S, &DOptUnusedLoads, 1);
Changes += RunOptFunc (S, &DOptAXLoad, 5);
Changes += RunOptFunc (S, &DOptUnusedStores, 1);
Changes += RunOptFunc (S, &DOptJumpTarget1, 5);
Changes += RunOptFunc (S, &DOptStore5, 1);