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fix instruction index error in optimizer

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Irmen de Jong 2024-10-19 14:45:53 +02:00
parent a40d120f2a
commit d5fc69d3e4
1 changed files with 2 additions and 2 deletions
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codeGenIntermediate/src/prog8/codegen/intermediate/IRPeepholeOptimizer.kt
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@ -64,7 +64,7 @@ class IRPeepholeOptimizer(private val irprog: IRProgram) {
private fun replaceConcatZeroMsbWithExt(chunk: IRCodeChunk, indexedInstructions: List<IndexedValue<IRInstruction>>): Boolean {
var changed = false
indexedInstructions.reversed().forEach { (idx, ins) ->
if (ins.opcode == Opcode.CONCAT) {
if (ins.opcode == Opcode.CONCAT && idx>0) {
// if the previous instruction loads a zero in the msb, this can be turned into EXT.B instead
val prev = indexedInstructions[idx-1].value
if(prev.opcode==Opcode.LOAD && prev.immediate==0 && prev.reg1==ins.reg2) {
@ -449,7 +449,7 @@ class IRPeepholeOptimizer(private val irprog: IRProgram) {
private fun removeDoubleLoadsAndStores(chunk: IRCodeChunk, indexedInstructions: List<IndexedValue<IRInstruction>>): Boolean {
var changed = false
indexedInstructions.forEach { (idx, ins) ->
if(ins.opcode==Opcode.STOREM) {
if(ins.opcode==Opcode.STOREM && idx>0) {
val prev = indexedInstructions[idx-1].value
if(prev.opcode==Opcode.LOADM) {
// loadm.X rX,something | storem.X rX,something ?? -> get rid of the store.