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fix certain inefficient codegen when assigning a type casted value

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This commit is contained in:
Irmen de Jong 2023-06-29 22:56:26 +02:00
parent 7649be97b1
commit 04da44eb98
3 changed files with 10 additions and 11 deletions
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2
.gitignore vendored
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@ -15,6 +15,7 @@ out/
parser/**/*.interp
parser/**/*.tokens
parser/**/*.java
compiler/src/prog8/buildversion/*
*.py[cod]
*.egg
*.egg-info
@ -32,3 +33,4 @@ compiler/lib/
/prog8compiler.jar
sd*.img
*.d64

17
codeGenCpu6502/src/prog8/codegen/cpu6502/assignment/AugmentableAssignmentAsmGen.kt
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@ -177,7 +177,6 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
SourceStorageKind.ARRAY -> inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", DataType.UBYTE, operator, value.array!!)
SourceStorageKind.EXPRESSION -> {
if(value.expression is PtTypeCast) {
if (tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator)) return
inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", DataType.UBYTE, operator, value.expression)
} else {
inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", DataType.UBYTE, operator, value.expression!!)
@ -259,6 +258,10 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
indexVar!=null -> {
when (target.datatype) {
in ByteDatatypes -> {
if(value.kind==SourceStorageKind.EXPRESSION
&& value.expression is PtTypeCast
&& tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator))
return
asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UBYTE, CpuRegister.Y)
asmgen.out(" lda ${target.array.variable.name},y | sta P8ZP_SCRATCH_B1")
asmgen.saveRegisterLocal(CpuRegister.Y, target.scope!!)
@ -270,10 +273,6 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
SourceStorageKind.ARRAY -> inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", target.datatype, operator, value.array!!)
SourceStorageKind.EXPRESSION -> {
if(value.expression is PtTypeCast) {
if (tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator)) {
asmgen.restoreRegisterLocal(CpuRegister.Y)
return
}
inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", target.datatype, operator, value.expression)
} else {
inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", target.datatype, operator, value.expression!!)
@ -285,6 +284,10 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
asmgen.out(" lda P8ZP_SCRATCH_B1 | sta ${target.array.variable.name},y")
}
in WordDatatypes -> {
if(value.kind==SourceStorageKind.EXPRESSION
&& value.expression is PtTypeCast
&& tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator))
return
asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UWORD, CpuRegister.Y)
if(target.array.splitWords) {
asmgen.out(" lda ${target.array.variable.name}_lsb,y | sta P8ZP_SCRATCH_W1")
@ -302,10 +305,6 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
SourceStorageKind.ARRAY -> inplaceModification_word_value_to_variable("P8ZP_SCRATCH_W1", target.datatype, operator, value.array!!)
SourceStorageKind.EXPRESSION -> {
if(value.expression is PtTypeCast) {
if (tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator)) {
asmgen.restoreRegisterLocal(CpuRegister.Y)
return
}
inplaceModification_word_value_to_variable("P8ZP_SCRATCH_W1", target.datatype, operator, value.expression)
} else {
inplaceModification_word_value_to_variable("P8ZP_SCRATCH_W1", target.datatype, operator, value.expression!!)

2
docs/source/todo.rst
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@ -1,8 +1,6 @@
TODO
====
- fix double code gen with tryInplaceModifyWithRemovedRedundantCast() ? word birdX[j] += testbyte
- prog8->asm symbol name prefixing: prefix ALL symbols with p8_ Also update manual.
EXCEPTION: library symbols such as cbm.CHROUT, cx16.r0 etc. should NOT be prefixed.
Solution: add %option no_symbol_prefix to those blocks?