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- MovOp2Op optimisation upgraded.

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J. Gareth "Curious Kit" Moreton 2024-04-18 17:15:32 +01:00 committed by FPK
parent 85ee93c2c5
commit 80f1d55822
1 changed files with 38 additions and 23 deletions
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61
compiler/x86/aoptx86.pas
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@ -3874,7 +3874,45 @@ unit aoptx86;
it may be possible to then fold it in the next optimisation. }
if ConvertLEA(taicpu(hp1)) then
Include(OptsToCheck, aoc_ForceNewIteration);
end;
{
mov ref,reg0
<op> reg0,reg1
dealloc reg0
to
<op> ref,reg1
}
if MatchOpType(taicpu(hp1),top_reg,top_reg) and
(taicpu(hp1).oper[0]^.reg = p_TargetReg) and
MatchInstruction(hp1, [A_AND, A_OR, A_XOR, A_ADD, A_SUB, A_CMP, A_TEST, A_CMOVcc, A_BSR, A_BSF, A_POPCNT, A_LZCNT], [taicpu(p).opsize]) and
not SuperRegistersEqual(taicpu(hp1).oper[1]^.reg, p_TargetReg) and
not RefModifiedBetween(taicpu(p).oper[0]^.ref^, topsize2memsize[taicpu(p).opsize] shr 3, p, hp1) then
begin
TransferUsedRegs(TmpUsedRegs);
UpdateUsedRegsBetween(TmpUsedRegs, tai(p.Next), hp1);
if not RegUsedAfterInstruction(p_TargetReg, hp1, TmpUsedRegs) then
begin
taicpu(hp1).loadref(0,taicpu(p).oper[0]^.ref^);
{ loadref increases the reference count, so decrement it again }
if Assigned(taicpu(p).oper[0]^.ref^.symbol) then
taicpu(p).oper[0]^.ref^.symbol.decrefs;
if Assigned(taicpu(p).oper[0]^.ref^.relsymbol) then
taicpu(p).oper[0]^.ref^.relsymbol.decrefs;
DebugMsg(SPeepholeOptimization + 'MovOp2Op done',hp1);
{ See if we can remove the allocation of reg0 }
if not RegInRef(p_TargetReg, taicpu(p).oper[0]^.ref^) then
TryRemoveRegAlloc(p_TargetReg, p, hp1);
RemoveCurrentp(p);
Result:=true;
exit;
end;
end;
end;
@ -5286,29 +5324,6 @@ unit aoptx86;
exit;
end;
{
mov ref,reg0
<op> reg0,reg1
dealloc reg0
to
<op> ref,reg1
}
if MatchOpType(taicpu(p),top_ref,top_reg) and
MatchOpType(taicpu(hp1),top_reg,top_reg) and
MatchOperand(taicpu(p).oper[1]^,taicpu(hp1).oper[0]^) and
MatchInstruction(hp1,[A_AND,A_OR,A_XOR,A_ADD,A_SUB,A_CMP],[Taicpu(p).opsize]) and
not(MatchOperand(taicpu(hp1).oper[0]^,taicpu(hp1).oper[1]^)) and
RegEndOfLife(taicpu(p).oper[1]^.reg,taicpu(hp1)) then
begin
taicpu(hp1).loadoper(0,taicpu(p).oper[0]^);
DebugMsg(SPeepholeOptimization + 'MovOp2Op done',hp1);
RemoveCurrentp(p, hp1);
Result:=true;
exit;
end;
if (taicpu(p).oper[0]^.typ = top_ref) and { Second operand will be a register }
MatchInstruction(hp1, A_SHR, A_SAR, [taicpu(p).opsize]) and
MatchOpType(taicpu(hp1), top_const, top_reg) and