|
|
@@ -71,9 +71,10 @@ unit aoptx86;
|
|
|
function OptPass1LEA(var p : tai) : boolean;
|
|
|
function OptPass1Sub(var p : tai) : boolean;
|
|
|
function OptPass1SHLSAL(var p : tai) : boolean;
|
|
|
- function OptPass1SETcc(var p: tai): boolean;
|
|
|
- function OptPass1FSTP(var p: tai): boolean;
|
|
|
- function OptPass1FLD(var p: tai): boolean;
|
|
|
+ function OptPass1SETcc(var p : tai) : boolean;
|
|
|
+ function OptPass1FSTP(var p : tai) : boolean;
|
|
|
+ function OptPass1FLD(var p : tai) : boolean;
|
|
|
+ function OptPass1Cmp(var p : tai) : boolean;
|
|
|
|
|
|
function OptPass2MOV(var p : tai) : boolean;
|
|
|
function OptPass2Imul(var p : tai) : boolean;
|
|
|
@@ -3016,6 +3017,93 @@ unit aoptx86;
|
|
|
end;
|
|
|
|
|
|
|
|
|
+ function TX86AsmOptimizer.OptPass1Cmp(var p: tai): boolean;
|
|
|
+ var
|
|
|
+ v: QWord;
|
|
|
+ hp1, hp2, hp3, hp4: tai;
|
|
|
+ begin
|
|
|
+ Result:=false;
|
|
|
+ { cmp register,$8000 neg register
|
|
|
+ je target --> jo target
|
|
|
+
|
|
|
+ .... only if register is deallocated before jump.}
|
|
|
+ case Taicpu(p).opsize of
|
|
|
+ S_B: v:=$80;
|
|
|
+ S_W: v:=$8000;
|
|
|
+ S_L: v:=qword($80000000);
|
|
|
+ S_Q : v:=qword($8000000000000000);
|
|
|
+ else
|
|
|
+ internalerror(2013112905);
|
|
|
+ end;
|
|
|
+ if MatchOpType(taicpu(p),Top_const,top_reg) and
|
|
|
+ (taicpu(p).oper[0]^.val=v) and
|
|
|
+ GetNextInstruction(p, hp1) and
|
|
|
+ MatchInstruction(hp1,A_Jcc,[]) and
|
|
|
+ (Taicpu(hp1).condition in [C_E,C_NE]) then
|
|
|
+ begin
|
|
|
+ TransferUsedRegs(TmpUsedRegs);
|
|
|
+ UpdateUsedRegs(TmpUsedRegs,tai(p.next));
|
|
|
+ if not(RegInUsedRegs(Taicpu(p).oper[1]^.reg, TmpUsedRegs)) then
|
|
|
+ begin
|
|
|
+ DebugMsg(SPeepholeOptimization + 'CmpJe2NegJo done',p);
|
|
|
+ Taicpu(p).opcode:=A_NEG;
|
|
|
+ Taicpu(p).loadoper(0,Taicpu(p).oper[1]^);
|
|
|
+ Taicpu(p).clearop(1);
|
|
|
+ Taicpu(p).ops:=1;
|
|
|
+ if Taicpu(hp1).condition=C_E then
|
|
|
+ Taicpu(hp1).condition:=C_O
|
|
|
+ else
|
|
|
+ Taicpu(hp1).condition:=C_NO;
|
|
|
+ Result:=true;
|
|
|
+ exit;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+ {
|
|
|
+ @@2: @@2:
|
|
|
+ .... ....
|
|
|
+ cmp operand1,0
|
|
|
+ jle/jbe @@1
|
|
|
+ dec operand1 --> sub operand1,1
|
|
|
+ jmp @@2 jge/jae @@2
|
|
|
+ @@1: @@1:
|
|
|
+ ... ....}
|
|
|
+ if (taicpu(p).oper[0]^.typ = top_const) and
|
|
|
+ (taicpu(p).oper[1]^.typ in [top_reg,top_ref]) and
|
|
|
+ (taicpu(p).oper[0]^.val = 0) and
|
|
|
+ GetNextInstruction(p, hp1) and
|
|
|
+ MatchInstruction(hp1,A_Jcc,[]) and
|
|
|
+ (taicpu(hp1).condition in [C_LE,C_BE]) and
|
|
|
+ GetNextInstruction(hp1,hp2) and
|
|
|
+ MatchInstruction(hp1,A_DEC,[]) and
|
|
|
+ OpsEqual(taicpu(hp2).oper[0]^,taicpu(p).oper[1]^) and
|
|
|
+ GetNextInstruction(hp2, hp3) and
|
|
|
+ MatchInstruction(hp1,A_JMP,[]) and
|
|
|
+ GetNextInstruction(hp3, hp4) and
|
|
|
+ FindLabel(tasmlabel(taicpu(hp1).oper[0]^.ref^.symbol),hp4) then
|
|
|
+ begin
|
|
|
+ DebugMsg(SPeepholeOptimization + 'CmpJxxDecJmp2SubJcc done',p);
|
|
|
+ taicpu(hp2).Opcode := A_SUB;
|
|
|
+ taicpu(hp2).loadoper(1,taicpu(hp2).oper[0]^);
|
|
|
+ taicpu(hp2).loadConst(0,1);
|
|
|
+ taicpu(hp2).ops:=2;
|
|
|
+ taicpu(hp3).Opcode := A_Jcc;
|
|
|
+ case taicpu(hp1).condition of
|
|
|
+ C_LE: taicpu(hp3).condition := C_GE;
|
|
|
+ C_BE: taicpu(hp3).condition := C_AE;
|
|
|
+ else
|
|
|
+ internalerror(2019050903);
|
|
|
+ end;
|
|
|
+ asml.remove(p);
|
|
|
+ asml.remove(hp1);
|
|
|
+ p.free;
|
|
|
+ hp1.free;
|
|
|
+ p := hp2;
|
|
|
+ Result:=true;
|
|
|
+ exit;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
function TX86AsmOptimizer.OptPass2MOV(var p : tai) : boolean;
|
|
|
var
|
|
|
hp1,hp2: tai;
|
florian