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+ AArchz64: TCpuAsmOptimizer.OptPass1SXTW

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florian 2022-08-31 20:33:59 +02:00
parent 2931b43000
commit 8a0498622b
1 changed files with 69 additions and 0 deletions
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69
compiler/aarch64/aoptcpu.pas
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@ -62,6 +62,7 @@ Interface
function OptPass1Mov(var p: tai): boolean;
function OptPass1MOVZ(var p: tai): boolean;
function OptPass1FMov(var p: tai): Boolean;
function OptPass1SXTW(var p: tai): Boolean;
function OptPass2LDRSTR(var p: tai): boolean;
End;
@ -715,6 +716,72 @@ Implementation
end;
function TCpuAsmOptimizer.OptPass1SXTW(var p : tai) : Boolean;
var
hp1: tai;
begin
Result:=false;
{
change
sxtw reg2,reg1
str reg2,[...]
dealloc reg2
to
str reg1,[...]
}
if MatchInstruction(p, taicpu(p).opcode, [C_None], [PF_None]) and
(taicpu(p).ops=2) and
GetNextInstructionUsingReg(p,hp1,taicpu(p).oper[0]^.reg) and
MatchInstruction(hp1, A_STR, [C_None], [PF_None]) and
(getsubreg(taicpu(p).oper[0]^.reg)=R_SUBD) and
RegEndofLife(taicpu(p).oper[0]^.reg,taicpu(hp1)) and
{ the reference in strb might not use reg2 }
not(RegInRef(taicpu(p).oper[0]^.reg,taicpu(hp1).oper[1]^.ref^)) and
{ reg1 might not be modified inbetween }
not(RegModifiedBetween(taicpu(p).oper[1]^.reg,p,hp1)) then
begin
DebugMsg('Peephole SXTHStr2Str done', p);
taicpu(hp1).loadReg(0,taicpu(p).oper[1]^.reg);
GetNextInstruction(p, hp1);
asml.remove(p);
p.free;
p:=hp1;
result:=true;
end
{
change
sxtw reg2,reg1
sxtw reg3,reg2
dealloc reg2
to
sxtw reg3,reg1
}
else if MatchInstruction(p, A_SXTW, [C_None], [PF_None]) and
(taicpu(p).ops=2) and
GetNextInstructionUsingReg(p,hp1,taicpu(p).oper[0]^.reg) and
MatchInstruction(hp1, A_SXTW, [C_None], [PF_None]) and
(taicpu(hp1).ops=2) and
MatchOperand(taicpu(hp1).oper[1]^, taicpu(p).oper[0]^.reg) and
RegEndofLife(taicpu(p).oper[0]^.reg,taicpu(hp1)) and
{ reg1 might not be modified inbetween }
not(RegModifiedBetween(taicpu(p).oper[1]^.reg,p,hp1)) then
begin
DebugMsg('Peephole SxtwSxtw2Sxtw done', p);
AllocRegBetween(taicpu(p).oper[1]^.reg,p,hp1,UsedRegs);
taicpu(hp1).opcode:=A_SXTW;
taicpu(hp1).loadReg(1,taicpu(p).oper[1]^.reg);
GetNextInstruction(p, hp1);
asml.remove(p);
p.free;
p:=hp1;
result:=true;
end
else if GetNextInstructionUsingReg(p, hp1, taicpu(p).oper[0]^.reg) and
RemoveSuperfluousMove(p, hp1, 'SxtwMov2Data') then
Result:=true;
end;
function TCpuAsmOptimizer.OptPass2LDRSTR(var p: tai): boolean;
var
hp1, hp1_last: tai;
@ -1018,6 +1085,8 @@ Implementation
Result:=OptPass1SXTB(p);
A_SXTH:
Result:=OptPass1SXTH(p);
A_SXTW:
Result:=OptPass1SXTW(p);
// A_VLDR,
A_FMADD,
A_FMSUB,