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remove redundant variable=0 initializations (BSS clear takes care of them)

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Irmen de Jong
2025-04-23 14:28:43 +02:00
parent 2cb183c6d8
commit d2cc7ccdfa
9 changed files with 69 additions and 39 deletions
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4
codeGenIntermediate/src/prog8/codegen/intermediate/IRCodeGen.kt
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@@ -64,15 +64,17 @@ class IRCodeGen(
if(variable.uninitialized && variable.parent.type==StNodeType.BLOCK) {
val block = variable.parent.astNode as PtBlock
val initialization = (block.children.firstOrNull {
it is PtAssignment && it.target.identifier?.name==variable.scopedName
it is PtAssignment && it.isVarInitializer && it.target.identifier?.name==variable.scopedName
} as PtAssignment?)
val initValue = initialization?.value
when(initValue){
is PtBool -> {
require(initValue.asInt()!=0) { "boolean var should not be initialized with false, it wil be set to false as part of BSS clear, initializer=$initialization" }
variable.setOnetimeInitNumeric(initValue.asInt().toDouble())
initsToRemove += block to initialization
}
is PtNumber -> {
require(initValue.number!=0.0) { "variable should not be initialized with 0, it will already be zeroed as part of BSS clear, initializer=$initialization" }
variable.setOnetimeInitNumeric(initValue.number)
initsToRemove += block to initialization
}