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+ do_spill_replace for avr

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git-svn-id: trunk@30535 -
This commit is contained in:
florian 2015-04-10 22:14:36 +00:00
parent f95d5e0de6
commit 315d7d9725
1 changed files with 38 additions and 1 deletions
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39
compiler/avr/rgcpu.pas
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@ -28,7 +28,7 @@ unit rgcpu;
interface
uses
aasmbase,aasmtai,aasmdata,aasmcpu,
aasmbase,aasmtai,aasmdata,aasmcpu,aasmsym,
cgbase,cgutils,
cpubase,
rgobj;
@ -38,6 +38,7 @@ unit rgcpu;
procedure add_constraints(reg:tregister);override;
procedure do_spill_read(list: TAsmList; pos: tai; const spilltemp: treference; tempreg: tregister; orgsupreg: tsuperregister); override;
procedure do_spill_written(list: TAsmList; pos: tai; const spilltemp: treference; tempreg: tregister; orgsupreg: tsuperregister); override;
function do_spill_replace(list : TAsmList;instr : tai_cpu_abstract_sym; orgreg : tsuperregister;const spilltemp : treference) : boolean; override;
end;
trgintcpu = class(trgcpu)
@ -166,4 +167,40 @@ unit rgcpu;
end;
function trgcpu.do_spill_replace(list:TAsmList;instr:tai_cpu_abstract_sym;orgreg:tsuperregister;const spilltemp:treference):boolean;
var
b : byte;
begin
result:=false;
if not(spilltemp.offset in [0..63]) then
exit;
{ Replace 'mov dst,orgreg' with 'ld dst,spilltemp'
and 'mov orgreg,src' with 'st dst,spilltemp' }
with instr do
begin
if (opcode=A_MOV) and (ops=2) and (oper[1]^.typ=top_reg) and (oper[0]^.typ=top_reg) then
begin
if (getregtype(oper[0]^.reg)=regtype) and
(get_alias(getsupreg(oper[0]^.reg))=orgreg) and
(get_alias(getsupreg(oper[1]^.reg))<>orgreg) then
begin
{ str expects the register in oper[0] }
instr.loadreg(0,oper[1]^.reg);
instr.loadref(1,spilltemp);
opcode:=A_ST;
result:=true;
end
else if (getregtype(oper[1]^.reg)=regtype) and
(get_alias(getsupreg(oper[1]^.reg))=orgreg) and
(get_alias(getsupreg(oper[0]^.reg))<>orgreg) then
begin
instr.loadref(1,spilltemp);
opcode:=A_LD;
result:=true;
end;
end;
end;
end;
end.