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Merge pull request #2735 from kugelfuhr/kugelfuhr/fix-2025

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Add an optimization that removes compare instructions preceeding RTS or function calls
This commit is contained in:
Bob Andrews
2025-06-26 00:29:29 +02:00
committed by GitHub
parent 54a2410b5a fa81f14cbf
commit 801508aecf
11 changed files with 63 additions and 3 deletions
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3
src/cc65/codeopt.c
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@@ -133,6 +133,7 @@ static OptFunc DOptCmp2 = { OptCmp2, "OptCmp2", 85, 0,
static OptFunc DOptCmp3 = { OptCmp3, "OptCmp3", 75, 0, 0, 0, 0, 0 };
static OptFunc DOptCmp4 = { OptCmp4, "OptCmp4", 75, 0, 0, 0, 0, 0 };
static OptFunc DOptCmp5 = { OptCmp5, "OptCmp5", 100, 0, 0, 0, 0, 0 };
static OptFunc DOptCmp6 = { OptCmp6, "OptCmp6", 33, 0, 0, 0, 0, 0 };
static OptFunc DOptCmp7 = { OptCmp7, "OptCmp7", 85, 0, 0, 0, 0, 0 };
static OptFunc DOptCmp8 = { OptCmp8, "OptCmp8", 50, 0, 0, 0, 0, 0 };
static OptFunc DOptCmp9 = { OptCmp9, "OptCmp9", 85, 0, 0, 0, 0, 0 };
@@ -255,6 +256,7 @@ static OptFunc* OptFuncs[] = {
&DOptCmp3,
&DOptCmp4,
&DOptCmp5,
&DOptCmp6,
&DOptCmp7,
&DOptCmp8,
&DOptCmp9,
@@ -729,6 +731,7 @@ static unsigned RunOptGroup3 (CodeSeg* S)
C += RunOptFunc (S, &DOptCondBranch3, 1);
C += RunOptFunc (S, &DOptCondBranchC, 1);
C += RunOptFunc (S, &DOptRTSJumps1, 1);
C += RunOptFunc (S, &DOptCmp6, 1); /* After OptRTSJumps1 */
C += RunOptFunc (S, &DOptBoolCmp, 1);
C += RunOptFunc (S, &DOptBoolTrans, 1);
C += RunOptFunc (S, &DOptBNegA2, 1); /* After OptCondBranch's */