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keep fix #93

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merged 1 commit into from
Apr 15, 2022
Merged

keep fix #93

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33 changes: 24 additions & 9 deletions src/mp.pas
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Original file line number Diff line number Diff line change
Expand Up @@ -379,11 +379,12 @@
MAXTYPES = 1024;
// MAXTOKENS = 32768;
MAXIDENTS = 16384;
MAXBLOCKS = 16384; // maksymalna liczba blokow
MAXPARAMS = 8; // maksymalna liczba parametrow dla PROC, FUNC
MAXVARS = 256; // maksymalna liczba parametrow dla VAR
MAXBLOCKS = 16384; // maksymalna liczba blokow
MAXPARAMS = 8; // maksymalna liczba parametrow dla PROC, FUNC
MAXKEEPS = 255; // maksymalna liczba PROC, FUNC oznaczonych jako KEEP
MAXVARS = 256; // maksymalna liczba parametrow dla VAR
MAXUNITS = 512;
MAXDEFINES = 256; // maksymalna liczba $DEFINE
MAXDEFINES = 256; // maksymalna liczba $DEFINE
MAXALLOWEDUNITS = 256;

CODEORIGIN = $100;
Expand Down Expand Up @@ -640,7 +641,11 @@ TIdentifier = record
BreakPosStack: array [0..1023] of TPosStack;
CodePosStack: array [0..1023] of Word;
BlockStack: array [0..MAXBLOCKS - 1] of Integer;
CallGraph: array [1..MAXBLOCKS] of TCallGraphNode; // For dead code elimination
CallGraph: array [1..MAXBLOCKS] of TCallGraphNode; // For dead code elimination
Keeper: array [0..MAXKEEPS] of integer; // tablica z ID PROC, FUNC oznaczonymi jako `keep`


KeepIndex: byte = 0;

OldConstValType: byte;

Expand Down Expand Up @@ -46315,6 +46320,12 @@ function DefineFunction(i, ForwardIdentIndex: integer; out isForward, isInt, isI
inc(i);
end;// while

if Ident[NumIdent].isKeep then begin
Keeper[KeepIndex] := NumIdent;
inc(KeepIndex);
if KeepIndex > MAXKEEPS then
Error(i, 'You have exceeded the allowed number of "KEEP" code blocks');
end;

if Ident[NumIdent].isRegister and (Ident[NumIdent].isPascal or Ident[NumIdent].isRecursion) then
Error(i, 'Calling convention directive "REGISTER" not applicable with "PASCAL"');
Expand Down Expand Up @@ -49517,24 +49528,28 @@ procedure CompileProgram;


procedure OptimizeProgram;
var
keepIter: byte;

procedure MarkNotDead(IdentIndex: Integer);
var
ChildIndex, ChildIdentIndex: Integer;
begin

begin
Ident[IdentIndex].IsNotDead := TRUE;

for ChildIndex := 1 to CallGraph[Ident[IdentIndex].ProcAsBlock].NumChildren do
for ChildIdentIndex := 1 to NumIdent do
if Ident[ChildIdentIndex].ProcAsBlock = CallGraph[Ident[IdentIndex].ProcAsBlock].ChildBlock[ChildIndex] then
MarkNotDead(ChildIdentIndex);
MarkNotDead(ChildIdentIndex);
end;

begin
// Perform dead code elimination
MarkNotDead(GetIdent('MAIN'));
// Perform dead code elimination
for keepIter := 0 to (KeepIndex - 1) do
MarkNotDead(Keeper[keepIter]);

MarkNotDead(GetIdent('MAIN'));
end;


Expand Down