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6502: Fix comparison optimization

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This commit is contained in:
Karol Stasiak 2018-12-15 00:01:12 +01:00
parent 8055de506b
commit 4f8e4838e8
1 changed files with 11 additions and 4 deletions
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15
src/main/scala/millfork/assembly/mos/opt/ReverseFlowAnalyzerPerOpcode.scala
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@ -114,27 +114,34 @@ object ReverseFlowAnalyzerPerOpcode {
CMP -> (currentImportance => {
val ignoreOutput = allCompareOutputsAreUnimportant(currentImportance)
currentImportance.copy(
a = if (ignoreOutput) Unimportant else Important,
a = if (ignoreOutput) currentImportance.a else Important,
n = Unimportant, z = Unimportant, c = Unimportant,
m = Important)
}),
DCP -> (currentImportance => {
val ignoreOutput = allCompareOutputsAreUnimportant(currentImportance)
currentImportance.copy(
a = if (ignoreOutput) Unimportant else Important,
a = if (ignoreOutput) currentImportance.a else Important,
n = Unimportant, z = Unimportant, c = Unimportant)
}),
CPX -> (currentImportance => {
val ignoreOutput = allCompareOutputsAreUnimportant(currentImportance)
currentImportance.copy(
x = if (ignoreOutput) Unimportant else Important,
x = if (ignoreOutput) currentImportance.x else Important,
n = Unimportant, z = Unimportant, c = Unimportant,
w = Important)
}),
CPY -> (currentImportance => {
val ignoreOutput = allCompareOutputsAreUnimportant(currentImportance)
currentImportance.copy(
y = if (ignoreOutput) Unimportant else Important,
y = if (ignoreOutput) currentImportance.y else Important,
n = Unimportant, z = Unimportant, c = Unimportant,
w = Important)
}),
CPZ -> (currentImportance => {
val ignoreOutput = allCompareOutputsAreUnimportant(currentImportance)
currentImportance.copy(
iz = if (ignoreOutput) currentImportance.iz else Important,
n = Unimportant, z = Unimportant, c = Unimportant,
w = Important)
}),