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Added new opts OptBoolUnary1/OptBoolUnary2 to remove unnecessary cmp + bcastax/bnegax,

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as well as OptBoolUnary3 to "strength-reduce" certain bcastax/bnegax to boolne/booleq.
This commit is contained in:
acqn
2023-10-21 23:56:04 +08:00
parent e5bbdfa995
commit 79c52e742f
3 changed files with 263 additions and 2 deletions
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14
src/cc65/codeopt.c
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@@ -118,6 +118,9 @@ static OptFunc DOptBNegAX3 = { OptBNegAX3, "OptBNegAX3", 100, 0,
static OptFunc DOptBNegAX4 = { OptBNegAX4, "OptBNegAX4", 100, 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 };
static OptFunc DOptBoolUnary2 = { OptBoolUnary2, "OptBoolUnary2", 40, 0, 0, 0, 0, 0 };
static OptFunc DOptBoolUnary3 = { OptBoolUnary3, "OptBoolUnary3", 40, 0, 0, 0, 0, 0 };
static OptFunc DOptBranchDist = { OptBranchDist, "OptBranchDist", 0, 0, 0, 0, 0, 0 };
static OptFunc DOptBranchDist2 = { OptBranchDist2, "OptBranchDist2", 0, 0, 0, 0, 0, 0 };
static OptFunc DOptCmp1 = { OptCmp1, "OptCmp1", 42, 0, 0, 0, 0, 0 };
@@ -224,6 +227,9 @@ static OptFunc* OptFuncs[] = {
&DOptBNegAX4,
&DOptBoolCmp,
&DOptBoolTrans,
&DOptBoolUnary1,
&DOptBoolUnary2,
&DOptBoolUnary3,
&DOptBranchDist,
&DOptBranchDist2,
&DOptCmp1,
@@ -613,7 +619,6 @@ static unsigned RunOptGroup1 (CodeSeg* S)
Changes += RunOptFunc (S, &DOptPtrLoad15, 1);
Changes += RunOptFunc (S, &DOptPtrLoad16, 1);
Changes += RunOptFunc (S, &DOptPtrLoad17, 1);
Changes += RunOptFunc (S, &DOptBNegAX1, 1);
Changes += RunOptFunc (S, &DOptBNegAX2, 1);
Changes += RunOptFunc (S, &DOptBNegAX3, 1);
Changes += RunOptFunc (S, &DOptBNegAX4, 1);
@@ -673,7 +678,12 @@ static unsigned RunOptGroup3 (CodeSeg* S)
C += RunOptFunc (S, &DOptBNegA2, 1);
C += RunOptFunc (S, &DOptNegAX1, 1);
C += RunOptFunc (S, &DOptNegAX2, 1);
C += RunOptFunc (S, &DOptStackOps, 3);
C += RunOptFunc (S, &DOptStackOps, 3); /* Before OptBoolUnary1 */
C += RunOptFunc (S, &DOptCmp8, 1); /* Before OptBoolUnary1 */
C += RunOptFunc (S, &DOptBoolUnary1, 3);
C += RunOptFunc (S, &DOptBoolUnary2, 3);
C += RunOptFunc (S, &DOptBoolUnary3, 1);
C += RunOptFunc (S, &DOptBNegAX1, 1); /* After OptBoolUnary2 */
C += RunOptFunc (S, &DOptShift1, 1);
C += RunOptFunc (S, &DOptShift4, 1);
C += RunOptFunc (S, &DOptComplAX1, 1);