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IR: LOADI allows r1 and r2 to be the same for pointer chain dereference optimalization

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Irmen de Jong
2025-04-27 00:15:57 +02:00
parent 63a410a6df
commit 476a4bac8e
4 changed files with 11 additions and 72 deletions
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codeGenIntermediate/src/prog8/codegen/intermediate/ExpressionGen.kt
+2 -3
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@@ -1500,9 +1500,8 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
result += IRCodeChunk(null, null).also {
it += IRInstruction(Opcode.ADD, IRDataType.WORD, reg1 = pointerReg, immediate = fieldinfo.second)
if (!getLastPointerItselfInsteadOfItsValue || idx<targetPointerDeref.chain.size-1) {
// TODO IR instruction LOADI should allow reg1 and reg2 to be the same, so we can remove the extra 'newPointerReg'.
it += IRInstruction(Opcode.LOADI, IRDataType.WORD, reg1 = newPointerReg, reg2 = pointerReg)
it += IRInstruction(Opcode.LOADR, IRDataType.WORD, reg1 = pointerReg, reg2 = newPointerReg)
// LOADI has an exception to allowallow reg1 and reg2 to be the same, so we can avoid using extra temporary registers and LOADS
it += IRInstruction(Opcode.LOADI, IRDataType.WORD, reg1 = pointerReg, reg2 = pointerReg)
}
}
}