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re-enabled unused variable removal from library modules (+fixed some @shared vars in libraries)

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Irmen de Jong 2022-02-10 03:10:47 +01:00
parent 08bacdd090
commit 343f01d5e1
5 changed files with 8 additions and 9 deletions
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4
codeOptimizers/src/prog8/optimizer/UnusedCodeRemover.kt
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@ -106,10 +106,10 @@ class UnusedCodeRemover(private val program: Program,
if(decl.type==VarDeclType.VAR) {
val block = decl.definingBlock
val forceOutput = "force_output" in block.options()
if (!forceOutput && decl.origin==VarDeclOrigin.USERCODE && !decl.sharedWithAsm && !block.isInLibrary) { // TODO remove check on block.isInLibrary, but this now breaks some programs
if (!forceOutput && decl.origin==VarDeclOrigin.USERCODE && !decl.sharedWithAsm) {
val usages = callgraph.usages(decl)
if (usages.isEmpty()) {
if(!decl.definingModule.isLibrary)
// if(!decl.definingModule.isLibrary)
errors.warn("removing unused variable '${decl.name}'", decl.position)
return listOf(IAstModification.Remove(decl, parent as IStatementContainer))
}

2
compiler/res/prog8lib/conv.p8
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@ -7,7 +7,7 @@ conv {
; ----- number conversions to decimal strings ----
str string_out = "????????????????" ; result buffer for the string conversion routines
str @shared string_out = "????????????????" ; result buffer for the string conversion routines
asmsub str_ub0 (ubyte value @ A) clobbers(A,Y) {
; ---- convert the ubyte in A in decimal string form, with left padding 0s (3 positions total)

8
compiler/res/prog8lib/cx16/gfx2.p8
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@ -369,7 +369,7 @@ _done
set_both_strides(13) ; 160 increment = 1 line in 640 px 4c mode
color &= 3
color <<= gfx2.plot.shift4c[lsb(x) & 3]
ubyte mask = gfx2.plot.mask4c[lsb(x) & 3]
ubyte @shared mask = gfx2.plot.mask4c[lsb(x) & 3]
repeat height {
%asm {{
lda cx16.VERA_DATA0
@ -545,9 +545,9 @@ _done
}
sub plot(uword @zp x, uword y, ubyte color) {
ubyte[8] bits = [128, 64, 32, 16, 8, 4, 2, 1]
ubyte[4] mask4c = [%00111111, %11001111, %11110011, %11111100]
ubyte[4] shift4c = [6,4,2,0]
ubyte[8] @shared bits = [128, 64, 32, 16, 8, 4, 2, 1]
ubyte[4] @shared mask4c = [%00111111, %11001111, %11110011, %11111100]
ubyte[4] @shared shift4c = [6,4,2,0]
when active_mode {
1 -> {

2
compiler/res/prog8lib/diskio.p8
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@ -407,7 +407,7 @@ io_error:
sub save(ubyte drivenumber, uword filenameptr, uword address, uword size) -> ubyte {
c64.SETNAM(string.length(filenameptr), filenameptr)
c64.SETLFS(1, drivenumber, 0)
uword end_address = address + size
uword @shared end_address = address + size
first_byte = 0 ; result var reuse
%asm {{

1
docs/source/todo.rst
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@ -3,7 +3,6 @@ TODO
For next release
^^^^^^^^^^^^^^^^
- (newvaralloc) UnusedCodeRemover after(decl: VarDecl): fix that vars defined in a library can also safely be removed if unused. Currently this breaks programs such as textelite (due to diskio.save().end_address ?)
- make it so that subroutine parameters as variables can again be allocated in ZP, if there's still space