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asm store/load same optimizer back....

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This commit is contained in:
Irmen de Jong 2020-09-27 02:45:59 +02:00
parent 961380acb6
commit bec9cc7047
1 changed files with 8 additions and 0 deletions
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8
compiler/src/prog8/compiler/target/c64/codegen/AsmOptimizer.kt
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@ -31,6 +31,13 @@ fun optimizeAssembly(lines: MutableList<String>): Int {
numberOfOptimizations++
}
mods = optimizeStoreLoadSame(linesByFour)
if(mods.isNotEmpty()) {
apply(mods, lines)
linesByFour = getLinesBy(lines, 4)
numberOfOptimizations++
}
mods= optimizeJsrRts(linesByFour)
if(mods.isNotEmpty()) {
apply(mods, lines)
@ -172,6 +179,7 @@ private fun optimizeSameAssignments(linesByFourteen: List<List<IndexedValue<Stri
}
private fun optimizeStoreLoadSame(linesByFour: List<List<IndexedValue<String>>>): List<Modification> {
// TODO not sure if this is correct in all situations....:
// sta X + lda X, sty X + ldy X, stx X + ldx X -> the second instruction can be eliminated
val mods = mutableListOf<Modification>()
for (pair in linesByFour) {