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8080: Add one minor optimization

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Karol Stasiak 2019-11-12 13:50:12 +01:00
parent adc2969b73
commit 113befeb36
1 changed files with 4 additions and 0 deletions
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src/main/scala/millfork/assembly/z80/opt/AlwaysGoodI80Optimizations.scala
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@ -320,6 +320,10 @@ object AlwaysGoodI80Optimizations {
(Elidable & HasOpcode(LD) & MatchSourceRegisterAndOffset(2) & MatchTargetRealRegister(3) & DoesntMatterWhatItDoesWithMatchedRegisterOffset(2)) ~~> {(code, ctx) =>
List(code.head.copy(registers = TwoRegisters(ctx.get[ZRegister.Value](3), IMM_8)))
},
//69
(HasOpcode(LD) & MatchSourceRealRegister(2) & MatchTargetRealRegister(3)) ~
(Elidable & HasOpcode(LD) & MatchSourceRealRegister(3) & MatchTargetRealRegister(2)) ~~> (_.init),
)
val PointlessStackStashing = new RuleBasedAssemblyOptimization("Pointless stack stashing",