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Added/improved the optimizations:

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* Added a new pass that optimizes PHA/PLA sequences
* Added a new pass that optimizes AND/EOR/ORA when an operand is known
* Added a run of an existing pass at later stages to remove code that
  otherwise goes unchanged.
* Handle binary operations in OptUnusedLoads in addition to real loads.
This commit is contained in:
Kugel Fuhr
2024-09-05 19:59:02 +02:00
parent 7260c10062
commit 6e18e0880a
6 changed files with 315 additions and 6 deletions
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8
src/cc65/codeopt.c
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@@ -117,6 +117,7 @@ static OptFunc DOptBNegAX1 = { OptBNegAX1, "OptBNegAX1", 100, 0,
static OptFunc DOptBNegAX2 = { OptBNegAX2, "OptBNegAX2", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptBNegAX3 = { OptBNegAX3, "OptBNegAX3", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptBNegAX4 = { OptBNegAX4, "OptBNegAX4", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptBinOps = { OptBinOps, "OptBinOps", 0, 0, 0, 0, 0, 0 };
static OptFunc DOptBoolCmp = { OptBoolCmp, "OptBoolCmp", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptBoolTrans = { OptBoolTrans, "OptBoolTrans", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptBoolUnary1 = { OptBoolUnary1, "OptBoolUnary1", 40, 0, 0, 0, 0, 0 };
@@ -179,6 +180,7 @@ static OptFunc DOptPush1 = { OptPush1, "OptPush1", 65, 0,
static OptFunc DOptPush2 = { OptPush2, "OptPush2", 50, 0, 0, 0, 0, 0 };
static OptFunc DOptPushPop1 = { OptPushPop1, "OptPushPop1", 0, 0, 0, 0, 0, 0 };
static OptFunc DOptPushPop2 = { OptPushPop2, "OptPushPop2", 0, 0, 0, 0, 0, 0 };
static OptFunc DOptPushPop3 = { OptPushPop3, "OptPushPop3", 0, 0, 0, 0, 0, 0 };
static OptFunc DOptRTS = { OptRTS, "OptRTS", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptRTSJumps1 = { OptRTSJumps1, "OptRTSJumps1", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptRTSJumps2 = { OptRTSJumps2, "OptRTSJumps2", 100, 0, 0, 0, 0, 0 };
@@ -231,6 +233,7 @@ static OptFunc* OptFuncs[] = {
&DOptBNegAX2,
&DOptBNegAX3,
&DOptBNegAX4,
&DOptBinOps,
&DOptBoolCmp,
&DOptBoolTrans,
&DOptBoolUnary1,
@@ -292,6 +295,8 @@ static OptFunc* OptFuncs[] = {
&DOptPush1,
&DOptPush2,
&DOptPushPop1,
&DOptPushPop2,
&DOptPushPop3,
&DOptRTS,
&DOptRTSJumps1,
&DOptRTSJumps2,
@@ -740,9 +745,11 @@ static unsigned RunOptGroup3 (CodeSeg* S)
C += RunOptFunc (S, &DOptStore5, 1);
C += RunOptFunc (S, &DOptPushPop1, 1);
C += RunOptFunc (S, &DOptPushPop2, 1);
C += RunOptFunc (S, &DOptPushPop3, 1);
C += RunOptFunc (S, &DOptPrecalc, 1);
C += RunOptFunc (S, &DOptShiftBack, 1);
C += RunOptFunc (S, &DOptSignExtended, 1);
C += RunOptFunc (S, &DOptBinOps, 1);
Changes += C;
@@ -849,6 +856,7 @@ static unsigned RunOptGroup7 (CodeSeg* S)
Changes += RunOptFunc (S, &DOptUnusedStores, 1);
Changes += RunOptFunc (S, &DOptJumpTarget1, 5);
Changes += RunOptFunc (S, &DOptStore5, 1);
Changes += RunOptFunc (S, &DOptTransfers1, 1);
}
C = RunOptFunc (S, &DOptSize2, 1);