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* avr stackframe generation improved

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git-svn-id: branches/avr@17048 -
This commit is contained in:
florian 2011-02-27 21:11:40 +00:00
parent 9234486a42
commit e95bf26148
2 changed files with 3 additions and 15 deletions
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16
compiler/avr/cpupi.pas
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@ -33,7 +33,6 @@ unit cpupi;
type type
tavrprocinfo = class(tcgprocinfo) tavrprocinfo = class(tcgprocinfo)
floatregstart : aint;
// procedure handle_body_start;override; // procedure handle_body_start;override;
// procedure after_pass1;override; // procedure after_pass1;override;
procedure set_first_temp_offset;override; procedure set_first_temp_offset;override;
@ -54,26 +53,14 @@ unit cpupi;
procedure tavrprocinfo.set_first_temp_offset; procedure tavrprocinfo.set_first_temp_offset;
begin begin
{ We allocate enough space to save all registers because we can't determine
the necessary space because the used registers aren't known before
secondpass is run. Even worse, patching
the local offsets after generating the code could cause trouble because
"shifter" constants could change to non-"shifter" constants. This
is especially a problem when taking the address of a local. For now,
this extra memory should hurt less than generating all local contants with offsets
>256 as non shifter constants }
if tg.direction = -1 then if tg.direction = -1 then
tg.setfirsttemp(-12-28) tg.setfirsttemp(0)
else else
tg.setfirsttemp(maxpushedparasize); tg.setfirsttemp(maxpushedparasize);
end; end;
function tavrprocinfo.calc_stackframe_size:longint; function tavrprocinfo.calc_stackframe_size:longint;
var
firstfloatreg,lastfloatreg,
r : byte;
floatsavesize : aword;
begin begin
maxpushedparasize:=align(maxpushedparasize,max(current_settings.alignment.localalignmin,4)); maxpushedparasize:=align(maxpushedparasize,max(current_settings.alignment.localalignmin,4));
end; end;
@ -82,3 +69,4 @@ unit cpupi;
begin begin
cprocinfo:=tavrprocinfo; cprocinfo:=tavrprocinfo;
end. end.

2
compiler/tgobj.pas
View File

@ -161,7 +161,7 @@ implementation
tempfreelist:=nil; tempfreelist:=nil;
templist:=nil; templist:=nil;
{ we could create a new child class for this but I don't if it is worth the effort (FK) } { we could create a new child class for this but I don't if it is worth the effort (FK) }
{$if defined(powerpc) or defined(powerpc64)} {$if defined(powerpc) or defined(powerpc64) or defined(avr)}
direction:=1; direction:=1;
{$else} {$else}
direction:=-1; direction:=-1;