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+ OpCmp2Op optimization for AVR
git-svn-id: trunk@31013 -
This commit is contained in:
florian
parent
86c7867c46
commit
b1147ba1b7
@ -49,6 +49,9 @@ Implementation
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globals,globtype,
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cgutils;
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type
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TAsmOpSet = set of TAsmOp;
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function CanBeCond(p : tai) : boolean;
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begin
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result:=(p.typ=ait_instruction) and (taicpu(p).condition=C_None);
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@ -98,6 +101,14 @@ Implementation
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end;
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function MatchInstruction(const instr: tai; const ops: TAsmOpSet): boolean;
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begin
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result :=
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(instr.typ = ait_instruction) and
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(taicpu(instr).opcode in ops);
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end;
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function TCpuAsmOptimizer.RegInInstruction(Reg: TRegister; p1: tai): Boolean;
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begin
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If (p1.typ = ait_instruction) and (taicpu(p1).opcode in [A_MUL,A_MULS,A_FMUL,A_FMULS,A_FMULSU]) and
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@ -129,350 +140,395 @@ Implementation
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case p.typ of
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ait_instruction:
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begin
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case taicpu(p).opcode of
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A_LDI:
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begin
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{ turn
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ldi reg0, imm
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cp reg1, reg0
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dealloc reg0
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into
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cpi reg1, imm
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}
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if (taicpu(p).ops=2) and
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(taicpu(p).oper[0]^.typ=top_reg) and
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(taicpu(p).oper[1]^.typ=top_const) and
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GetNextInstructionUsingReg(p, hp1, taicpu(p).oper[0]^.reg) and
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(hp1.typ=ait_instruction) and
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(not RegModifiedBetween(taicpu(p).oper[0]^.reg, p, hp1)) and
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(taicpu(hp1).opcode=A_CP) and
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(taicpu(hp1).ops=2) and
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(taicpu(hp1).oper[1]^.typ=top_reg) and
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(getsupreg(taicpu(hp1).oper[0]^.reg) in [16..31]) and
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(taicpu(hp1).oper[1]^.reg=taicpu(p).oper[0]^.reg) and
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assigned(FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next))) then
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begin
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taicpu(hp1).opcode:=A_CPI;
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taicpu(hp1).loadconst(1, taicpu(p).oper[1]^.val);
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alloc:=FindRegAllocBackward(taicpu(p).oper[0]^.reg,tai(p.Previous));
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dealloc:=FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next));
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if assigned(alloc) and assigned(dealloc) then
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begin
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asml.Remove(alloc);
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alloc.Free;
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asml.Remove(dealloc);
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dealloc.Free;
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end;
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GetNextInstruction(p,hp1);
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asml.Remove(p);
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p.Free;
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p:=hp1;
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result:=true;
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end;
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end;
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A_STS:
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if (taicpu(p).oper[0]^.ref^.symbol=nil) and
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(taicpu(p).oper[0]^.ref^.relsymbol=nil) and
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(getsupreg(taicpu(p).oper[0]^.ref^.base)=RS_NO) and
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(getsupreg(taicpu(p).oper[0]^.ref^.index)=RS_NO) and
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(taicpu(p).oper[0]^.ref^.addressmode=AM_UNCHANGED) and
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(taicpu(p).oper[0]^.ref^.offset>=32) and
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(taicpu(p).oper[0]^.ref^.offset<=95) then
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{
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change
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<op> reg,x,y
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cp reg,r1
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into
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<op>s reg,x,y
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}
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{ this optimization can applied only to the currently enabled operations because
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the other operations do not update all flags and FPC does not track flag usage }
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if MatchInstruction(p, [A_ADC,A_ADD,A_AND,A_ANDI,A_ASR,A_COM,A_DEC,A_EOR,
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A_INC,A_LSL,A_LSR,
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A_OR,A_ORI,A_ROL,A_ROR,A_SBC,A_SBCI,A_SUB,A_SUBI]) and
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GetNextInstruction(p, hp1) and
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MatchInstruction(hp1, A_CP) and
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(taicpu(p).oper[0]^.reg = taicpu(hp1).oper[0]^.reg) and
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(taicpu(hp1).oper[1]^.reg = NR_R1) and
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GetNextInstruction(hp1, hp2) and
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{ be careful here, following instructions could use other flags
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however after a jump fpc never depends on the value of flags }
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{ All above instructions set Z and N according to the following
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Z := result = 0;
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N := result[31];
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EQ = Z=1; NE = Z=0;
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MI = N=1; PL = N=0; }
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MatchInstruction(hp2, A_BRxx) and
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(taicpu(hp2).condition in [C_EQ,C_NE,C_MI,C_PL]) { and
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no flag allocation tracking implemented yet on avr
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assigned(FindRegDealloc(NR_DEFAULTFLAGS,tai(hp2.Next)))} then
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begin
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{ move flag allocation if possible }
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{ no flag allocation tracking implemented yet on avr
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GetLastInstruction(hp1, hp2);
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hp2:=FindRegAlloc(NR_DEFAULTFLAGS,tai(hp2.Next));
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if assigned(hp2) then
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begin
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taicpu(p).opcode:=A_OUT;
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taicpu(p).loadconst(0,taicpu(p).oper[0]^.ref^.offset-32);
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asml.Remove(hp2);
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asml.insertbefore(hp2, p);
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end;
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A_LDS:
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if (taicpu(p).oper[1]^.ref^.symbol=nil) and
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(taicpu(p).oper[1]^.ref^.relsymbol=nil) and
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(getsupreg(taicpu(p).oper[1]^.ref^.base)=RS_NO) and
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(getsupreg(taicpu(p).oper[1]^.ref^.index)=RS_NO) and
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(taicpu(p).oper[1]^.ref^.addressmode=AM_UNCHANGED) and
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(taicpu(p).oper[1]^.ref^.offset>=32) and
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(taicpu(p).oper[1]^.ref^.offset<=95) then
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}
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asml.remove(hp1);
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hp1.free;
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Result:=true;
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end
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else
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case taicpu(p).opcode of
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A_LDI:
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begin
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taicpu(p).opcode:=A_IN;
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taicpu(p).loadconst(1,taicpu(p).oper[1]^.ref^.offset-32);
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end;
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A_IN:
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if GetNextInstruction(p,hp1) then
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begin
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{
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in rX,Y
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ori rX,n
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out Y,rX
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into
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sbi rX,lg(n)
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}
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if MatchInstruction(hp1,A_ORI) and
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(taicpu(hp1).oper[0]^.reg=taicpu(p).oper[0]^.reg) and
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(PopCnt(byte(taicpu(hp1).oper[1]^.val))=1) and
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GetNextInstruction(hp1,hp2) and
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MatchInstruction(hp2,A_OUT) and
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MatchOperand(taicpu(hp2).oper[1]^,taicpu(p).oper[0]^) and
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MatchOperand(taicpu(hp2).oper[0]^,taicpu(p).oper[1]^) then
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begin
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taicpu(p).opcode:=A_SBI;
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taicpu(p).loadconst(0,taicpu(p).oper[1]^.val);
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taicpu(p).loadconst(1,BsrByte(taicpu(hp1).oper[1]^.val)-1);
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asml.Remove(hp1);
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hp1.Free;
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asml.Remove(hp2);
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hp2.Free;
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result:=true;
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end
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{
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in rX,Y
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andi rX,not(n)
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out Y,rX
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into
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cbi rX,lg(n)
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}
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else if MatchInstruction(hp1,A_ANDI) and
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(taicpu(hp1).oper[0]^.reg=taicpu(p).oper[0]^.reg) and
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(PopCnt(byte(not(taicpu(hp1).oper[1]^.val)))=1) and
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GetNextInstruction(hp1,hp2) and
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MatchInstruction(hp2,A_OUT) and
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MatchOperand(taicpu(hp2).oper[1]^,taicpu(p).oper[0]^) and
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MatchOperand(taicpu(hp2).oper[0]^,taicpu(p).oper[1]^) then
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begin
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taicpu(p).opcode:=A_CBI;
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taicpu(p).loadconst(0,taicpu(p).oper[1]^.val);
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taicpu(p).loadconst(1,BsrByte(not(taicpu(hp1).oper[1]^.val))-1);
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asml.Remove(hp1);
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hp1.Free;
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asml.Remove(hp2);
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hp2.Free;
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result:=true;
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end;
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end;
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A_CLR:
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begin
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{ turn the common
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clr rX
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mov/ld rX, rY
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into
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mov/ld rX, rY
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}
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if (taicpu(p).ops=1) and
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(taicpu(p).oper[0]^.typ=top_reg) and
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GetNextInstructionUsingReg(p, hp1, taicpu(p).oper[0]^.reg) and
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(not RegModifiedBetween(taicpu(p).oper[0]^.reg, p, hp1)) and
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(hp1.typ=ait_instruction) and
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(taicpu(hp1).opcode in [A_MOV,A_LD]) and
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(taicpu(hp1).ops>0) and
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(taicpu(hp1).oper[0]^.typ=top_reg) and
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(taicpu(hp1).oper[0]^.reg=taicpu(p).oper[0]^.reg) then
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begin
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asml.Remove(p);
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p.Free;
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p:=hp1;
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result:=true;
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end
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{ turn
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clr rX
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...
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adc rY, rX
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into
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...
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adc rY, r1
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}
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else if (taicpu(p).ops=1) and
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(taicpu(p).oper[0]^.typ=top_reg) and
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GetNextInstructionUsingReg(p, hp1, taicpu(p).oper[0]^.reg) and
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(not RegModifiedBetween(taicpu(p).oper[0]^.reg, p, hp1)) and
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(hp1.typ=ait_instruction) and
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(taicpu(hp1).opcode in [A_ADC,A_SBC]) and
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(taicpu(hp1).ops=2) and
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(taicpu(hp1).oper[1]^.typ=top_reg) and
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(taicpu(hp1).oper[1]^.reg=taicpu(p).oper[0]^.reg) and
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(taicpu(hp1).oper[0]^.reg<>taicpu(p).oper[0]^.reg) and
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assigned(FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next))) then
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begin
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taicpu(hp1).oper[1]^.reg:=NR_R1;
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alloc:=FindRegAllocBackward(taicpu(p).oper[0]^.reg,tai(p.Previous));
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dealloc:=FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next));
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if assigned(alloc) and assigned(dealloc) then
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begin
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asml.Remove(alloc);
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alloc.Free;
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asml.Remove(dealloc);
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dealloc.Free;
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end;
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GetNextInstruction(p,hp1);
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asml.Remove(p);
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p.free;
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p:=hp1;
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result:=true;
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end;
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end;
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A_PUSH:
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begin
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{ turn
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push reg0
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push reg1
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pop reg3
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pop reg2
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into
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movw reg2,reg0
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}
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if (taicpu(p).ops=1) and
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(taicpu(p).oper[0]^.typ=top_reg) and
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GetNextInstruction(p,hp1) and
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(hp1.typ=ait_instruction) and
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(taicpu(hp1).opcode=A_PUSH) and
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(getsupreg(taicpu(hp1).oper[0]^.reg)=getsupreg(taicpu(p).oper[0]^.reg)+1) and
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((getsupreg(taicpu(p).oper[0]^.reg) mod 2)=0) and
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GetNextInstruction(hp1,hp2) and
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(hp2.typ=ait_instruction) and
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(taicpu(hp2).opcode=A_POP) and
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GetNextInstruction(hp2,hp3) and
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(hp3.typ=ait_instruction) and
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(taicpu(hp3).opcode=A_POP) and
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(getsupreg(taicpu(hp2).oper[0]^.reg)=getsupreg(taicpu(hp3).oper[0]^.reg)+1) and
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((getsupreg(taicpu(hp3).oper[0]^.reg) mod 2)=0) then
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begin
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taicpu(p).ops:=2;
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taicpu(p).opcode:=A_MOVW;
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taicpu(p).loadreg(1, taicpu(p).oper[0]^.reg);
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taicpu(p).loadreg(0, taicpu(hp3).oper[0]^.reg);
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asml.Remove(hp1);
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hp1.Free;
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asml.Remove(hp2);
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hp2.Free;
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asml.Remove(hp3);
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hp3.Free;
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result:=true;
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end;
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end;
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A_MOV:
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begin
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{ turn
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mov reg0, reg1
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push reg0
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dealloc reg0
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into
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push reg1
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}
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if (taicpu(p).ops=2) and
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(taicpu(p).oper[0]^.typ = top_reg) and
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(taicpu(p).oper[1]^.typ = top_reg) and
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GetNextInstructionUsingReg(p,hp1,taicpu(p).oper[0]^.reg) and
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(not RegModifiedBetween(taicpu(p).oper[1]^.reg, p, hp1)) and
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(hp1.typ = ait_instruction) and
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(taicpu(hp1).opcode in [A_PUSH,A_MOV,A_CP,A_CPC,A_ADD,A_SUB,A_EOR,A_AND,A_OR]) and
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RegInInstruction(taicpu(p).oper[0]^.reg, hp1) and
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(not RegModifiedByInstruction(taicpu(p).oper[0]^.reg, hp1)) and
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{(taicpu(hp1).ops=1) and
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(taicpu(hp1).oper[0]^.typ = top_reg) and
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(taicpu(hp1).oper[0]^.reg=taicpu(p).oper[0]^.reg) and }
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assigned(FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next))) then
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begin
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for i := 0 to taicpu(hp1).ops-1 do
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if taicpu(hp1).oper[i]^.typ=top_reg then
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if taicpu(hp1).oper[i]^.reg=taicpu(p).oper[0]^.reg then
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taicpu(hp1).oper[i]^.reg:=taicpu(p).oper[1]^.reg;
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alloc:=FindRegAllocBackward(taicpu(p).oper[0]^.reg,tai(p.Previous));
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dealloc:=FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next));
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if assigned(alloc) and assigned(dealloc) then
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begin
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asml.Remove(alloc);
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alloc.Free;
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asml.Remove(dealloc);
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dealloc.Free;
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end;
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GetNextInstruction(p,hp1);
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asml.Remove(p);
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p.free;
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p:=hp1;
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result:=true;
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end
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{ remove
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mov reg0,reg0
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}
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else if (taicpu(p).ops=2) and
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(taicpu(p).oper[0]^.typ = top_reg) and
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(taicpu(p).oper[1]^.typ = top_reg) and
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(taicpu(p).oper[0]^.reg = taicpu(p).oper[1]^.reg) then
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begin
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GetNextInstruction(p,hp1);
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asml.remove(p);
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p.free;
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p:=hp1;
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result:=true;
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end
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{ fold
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mov reg2,reg0
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mov reg3,reg1
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to
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movw reg2,reg0
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}
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else if (CPUAVR_HAS_MOVW in cpu_capabilities[current_settings.cputype]) and
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(taicpu(p).ops=2) and
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(taicpu(p).oper[0]^.typ = top_reg) and
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(taicpu(p).oper[1]^.typ = top_reg) and
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getnextinstruction(p,hp1) and
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(hp1.typ = ait_instruction) and
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(taicpu(hp1).opcode = A_MOV) and
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(taicpu(hp1).ops=2) and
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(taicpu(hp1).oper[0]^.typ = top_reg) and
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(taicpu(hp1).oper[1]^.typ = top_reg) and
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(getsupreg(taicpu(hp1).oper[0]^.reg)=getsupreg(taicpu(p).oper[0]^.reg)+1) and
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((getsupreg(taicpu(p).oper[0]^.reg) mod 2)=0) and
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((getsupreg(taicpu(p).oper[1]^.reg) mod 2)=0) and
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(getsupreg(taicpu(hp1).oper[1]^.reg)=getsupreg(taicpu(p).oper[1]^.reg)+1) then
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begin
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alloc:=FindRegAllocBackward(taicpu(hp1).oper[0]^.reg,tai(hp1.Previous));
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if assigned(alloc) then
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begin
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asml.Remove(alloc);
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asml.InsertBefore(alloc,p);
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end;
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taicpu(p).opcode:=A_MOVW;
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asml.remove(hp1);
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hp1.free;
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result:=true;
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end
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{
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This removes the first mov from
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mov rX,...
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mov rX,...
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}
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else if taicpu(hp1).opcode=A_MOV then
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while (hp1.typ=ait_instruction) and (taicpu(hp1).opcode=A_MOV) and
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MatchOperand(taicpu(p).oper[0]^, taicpu(hp1).oper[0]^) and
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{ don't remove the first mov if the second is a mov rX,rX }
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not(MatchOperand(taicpu(hp1).oper[0]^,taicpu(hp1).oper[1]^)) do
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{ turn
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ldi reg0, imm
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cp reg1, reg0
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dealloc reg0
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into
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cpi reg1, imm
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}
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if (taicpu(p).ops=2) and
|
||||
(taicpu(p).oper[0]^.typ=top_reg) and
|
||||
(taicpu(p).oper[1]^.typ=top_const) and
|
||||
GetNextInstructionUsingReg(p, hp1, taicpu(p).oper[0]^.reg) and
|
||||
(hp1.typ=ait_instruction) and
|
||||
(not RegModifiedBetween(taicpu(p).oper[0]^.reg, p, hp1)) and
|
||||
(taicpu(hp1).opcode=A_CP) and
|
||||
(taicpu(hp1).ops=2) and
|
||||
(taicpu(hp1).oper[1]^.typ=top_reg) and
|
||||
(getsupreg(taicpu(hp1).oper[0]^.reg) in [16..31]) and
|
||||
(taicpu(hp1).oper[1]^.reg=taicpu(p).oper[0]^.reg) and
|
||||
assigned(FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next))) then
|
||||
begin
|
||||
taicpu(hp1).opcode:=A_CPI;
|
||||
taicpu(hp1).loadconst(1, taicpu(p).oper[1]^.val);
|
||||
|
||||
alloc:=FindRegAllocBackward(taicpu(p).oper[0]^.reg,tai(p.Previous));
|
||||
dealloc:=FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next));
|
||||
|
||||
if assigned(alloc) and assigned(dealloc) then
|
||||
begin
|
||||
asml.Remove(alloc);
|
||||
alloc.Free;
|
||||
asml.Remove(dealloc);
|
||||
dealloc.Free;
|
||||
end;
|
||||
|
||||
GetNextInstruction(p,hp1);
|
||||
asml.Remove(p);
|
||||
p.Free;
|
||||
p:=hp1;
|
||||
|
||||
result:=true;
|
||||
end;
|
||||
end;
|
||||
A_STS:
|
||||
if (taicpu(p).oper[0]^.ref^.symbol=nil) and
|
||||
(taicpu(p).oper[0]^.ref^.relsymbol=nil) and
|
||||
(getsupreg(taicpu(p).oper[0]^.ref^.base)=RS_NO) and
|
||||
(getsupreg(taicpu(p).oper[0]^.ref^.index)=RS_NO) and
|
||||
(taicpu(p).oper[0]^.ref^.addressmode=AM_UNCHANGED) and
|
||||
(taicpu(p).oper[0]^.ref^.offset>=32) and
|
||||
(taicpu(p).oper[0]^.ref^.offset<=95) then
|
||||
begin
|
||||
taicpu(p).opcode:=A_OUT;
|
||||
taicpu(p).loadconst(0,taicpu(p).oper[0]^.ref^.offset-32);
|
||||
end;
|
||||
A_LDS:
|
||||
if (taicpu(p).oper[1]^.ref^.symbol=nil) and
|
||||
(taicpu(p).oper[1]^.ref^.relsymbol=nil) and
|
||||
(getsupreg(taicpu(p).oper[1]^.ref^.base)=RS_NO) and
|
||||
(getsupreg(taicpu(p).oper[1]^.ref^.index)=RS_NO) and
|
||||
(taicpu(p).oper[1]^.ref^.addressmode=AM_UNCHANGED) and
|
||||
(taicpu(p).oper[1]^.ref^.offset>=32) and
|
||||
(taicpu(p).oper[1]^.ref^.offset<=95) then
|
||||
begin
|
||||
taicpu(p).opcode:=A_IN;
|
||||
taicpu(p).loadconst(1,taicpu(p).oper[1]^.ref^.offset-32);
|
||||
end;
|
||||
A_IN:
|
||||
if GetNextInstruction(p,hp1) then
|
||||
begin
|
||||
{
|
||||
in rX,Y
|
||||
ori rX,n
|
||||
out Y,rX
|
||||
|
||||
into
|
||||
sbi rX,lg(n)
|
||||
}
|
||||
if MatchInstruction(hp1,A_ORI) and
|
||||
(taicpu(hp1).oper[0]^.reg=taicpu(p).oper[0]^.reg) and
|
||||
(PopCnt(byte(taicpu(hp1).oper[1]^.val))=1) and
|
||||
GetNextInstruction(hp1,hp2) and
|
||||
MatchInstruction(hp2,A_OUT) and
|
||||
MatchOperand(taicpu(hp2).oper[1]^,taicpu(p).oper[0]^) and
|
||||
MatchOperand(taicpu(hp2).oper[0]^,taicpu(p).oper[1]^) then
|
||||
begin
|
||||
taicpu(p).opcode:=A_SBI;
|
||||
taicpu(p).loadconst(0,taicpu(p).oper[1]^.val);
|
||||
taicpu(p).loadconst(1,BsrByte(taicpu(hp1).oper[1]^.val)-1);
|
||||
asml.Remove(hp1);
|
||||
hp1.Free;
|
||||
asml.Remove(hp2);
|
||||
hp2.Free;
|
||||
result:=true;
|
||||
end
|
||||
{
|
||||
in rX,Y
|
||||
andi rX,not(n)
|
||||
out Y,rX
|
||||
|
||||
into
|
||||
cbi rX,lg(n)
|
||||
}
|
||||
else if MatchInstruction(hp1,A_ANDI) and
|
||||
(taicpu(hp1).oper[0]^.reg=taicpu(p).oper[0]^.reg) and
|
||||
(PopCnt(byte(not(taicpu(hp1).oper[1]^.val)))=1) and
|
||||
GetNextInstruction(hp1,hp2) and
|
||||
MatchInstruction(hp2,A_OUT) and
|
||||
MatchOperand(taicpu(hp2).oper[1]^,taicpu(p).oper[0]^) and
|
||||
MatchOperand(taicpu(hp2).oper[0]^,taicpu(p).oper[1]^) then
|
||||
begin
|
||||
taicpu(p).opcode:=A_CBI;
|
||||
taicpu(p).loadconst(0,taicpu(p).oper[1]^.val);
|
||||
taicpu(p).loadconst(1,BsrByte(not(taicpu(hp1).oper[1]^.val))-1);
|
||||
asml.Remove(hp1);
|
||||
hp1.Free;
|
||||
asml.Remove(hp2);
|
||||
hp2.Free;
|
||||
result:=true;
|
||||
end;
|
||||
end;
|
||||
A_CLR:
|
||||
begin
|
||||
{ turn the common
|
||||
clr rX
|
||||
mov/ld rX, rY
|
||||
into
|
||||
mov/ld rX, rY
|
||||
}
|
||||
if (taicpu(p).ops=1) and
|
||||
(taicpu(p).oper[0]^.typ=top_reg) and
|
||||
GetNextInstructionUsingReg(p, hp1, taicpu(p).oper[0]^.reg) and
|
||||
(not RegModifiedBetween(taicpu(p).oper[0]^.reg, p, hp1)) and
|
||||
(hp1.typ=ait_instruction) and
|
||||
(taicpu(hp1).opcode in [A_MOV,A_LD]) and
|
||||
(taicpu(hp1).ops>0) and
|
||||
(taicpu(hp1).oper[0]^.typ=top_reg) and
|
||||
(taicpu(hp1).oper[0]^.reg=taicpu(p).oper[0]^.reg) then
|
||||
begin
|
||||
asml.Remove(p);
|
||||
p.Free;
|
||||
p:=hp1;
|
||||
result:=true;
|
||||
end
|
||||
{ turn
|
||||
clr rX
|
||||
...
|
||||
adc rY, rX
|
||||
into
|
||||
...
|
||||
adc rY, r1
|
||||
}
|
||||
else if (taicpu(p).ops=1) and
|
||||
(taicpu(p).oper[0]^.typ=top_reg) and
|
||||
GetNextInstructionUsingReg(p, hp1, taicpu(p).oper[0]^.reg) and
|
||||
(not RegModifiedBetween(taicpu(p).oper[0]^.reg, p, hp1)) and
|
||||
(hp1.typ=ait_instruction) and
|
||||
(taicpu(hp1).opcode in [A_ADC,A_SBC]) and
|
||||
(taicpu(hp1).ops=2) and
|
||||
(taicpu(hp1).oper[1]^.typ=top_reg) and
|
||||
(taicpu(hp1).oper[1]^.reg=taicpu(p).oper[0]^.reg) and
|
||||
(taicpu(hp1).oper[0]^.reg<>taicpu(p).oper[0]^.reg) and
|
||||
assigned(FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next))) then
|
||||
begin
|
||||
taicpu(hp1).oper[1]^.reg:=NR_R1;
|
||||
|
||||
alloc:=FindRegAllocBackward(taicpu(p).oper[0]^.reg,tai(p.Previous));
|
||||
dealloc:=FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next));
|
||||
|
||||
if assigned(alloc) and assigned(dealloc) then
|
||||
begin
|
||||
asml.Remove(alloc);
|
||||
alloc.Free;
|
||||
asml.Remove(dealloc);
|
||||
dealloc.Free;
|
||||
end;
|
||||
|
||||
GetNextInstruction(p,hp1);
|
||||
asml.Remove(p);
|
||||
p.free;
|
||||
p:=hp1;
|
||||
|
||||
result:=true;
|
||||
end;
|
||||
end;
|
||||
A_PUSH:
|
||||
begin
|
||||
{ turn
|
||||
push reg0
|
||||
push reg1
|
||||
pop reg3
|
||||
pop reg2
|
||||
into
|
||||
movw reg2,reg0
|
||||
}
|
||||
if (taicpu(p).ops=1) and
|
||||
(taicpu(p).oper[0]^.typ=top_reg) and
|
||||
GetNextInstruction(p,hp1) and
|
||||
(hp1.typ=ait_instruction) and
|
||||
(taicpu(hp1).opcode=A_PUSH) and
|
||||
(getsupreg(taicpu(hp1).oper[0]^.reg)=getsupreg(taicpu(p).oper[0]^.reg)+1) and
|
||||
((getsupreg(taicpu(p).oper[0]^.reg) mod 2)=0) and
|
||||
|
||||
GetNextInstruction(hp1,hp2) and
|
||||
(hp2.typ=ait_instruction) and
|
||||
(taicpu(hp2).opcode=A_POP) and
|
||||
|
||||
GetNextInstruction(hp2,hp3) and
|
||||
(hp3.typ=ait_instruction) and
|
||||
(taicpu(hp3).opcode=A_POP) and
|
||||
(getsupreg(taicpu(hp2).oper[0]^.reg)=getsupreg(taicpu(hp3).oper[0]^.reg)+1) and
|
||||
((getsupreg(taicpu(hp3).oper[0]^.reg) mod 2)=0) then
|
||||
begin
|
||||
taicpu(p).ops:=2;
|
||||
taicpu(p).opcode:=A_MOVW;
|
||||
|
||||
taicpu(p).loadreg(1, taicpu(p).oper[0]^.reg);
|
||||
taicpu(p).loadreg(0, taicpu(hp3).oper[0]^.reg);
|
||||
|
||||
asml.Remove(hp1);
|
||||
hp1.Free;
|
||||
asml.Remove(hp2);
|
||||
hp2.Free;
|
||||
asml.Remove(hp3);
|
||||
hp3.Free;
|
||||
|
||||
result:=true;
|
||||
end;
|
||||
end;
|
||||
A_MOV:
|
||||
begin
|
||||
{ turn
|
||||
mov reg0, reg1
|
||||
push reg0
|
||||
dealloc reg0
|
||||
into
|
||||
push reg1
|
||||
}
|
||||
if (taicpu(p).ops=2) and
|
||||
(taicpu(p).oper[0]^.typ = top_reg) and
|
||||
(taicpu(p).oper[1]^.typ = top_reg) and
|
||||
GetNextInstructionUsingReg(p,hp1,taicpu(p).oper[0]^.reg) and
|
||||
(not RegModifiedBetween(taicpu(p).oper[1]^.reg, p, hp1)) and
|
||||
(hp1.typ = ait_instruction) and
|
||||
(taicpu(hp1).opcode in [A_PUSH,A_MOV,A_CP,A_CPC,A_ADD,A_SUB,A_EOR,A_AND,A_OR]) and
|
||||
RegInInstruction(taicpu(p).oper[0]^.reg, hp1) and
|
||||
(not RegModifiedByInstruction(taicpu(p).oper[0]^.reg, hp1)) and
|
||||
{(taicpu(hp1).ops=1) and
|
||||
(taicpu(hp1).oper[0]^.typ = top_reg) and
|
||||
(taicpu(hp1).oper[0]^.reg=taicpu(p).oper[0]^.reg) and }
|
||||
assigned(FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next))) then
|
||||
begin
|
||||
for i := 0 to taicpu(hp1).ops-1 do
|
||||
if taicpu(hp1).oper[i]^.typ=top_reg then
|
||||
if taicpu(hp1).oper[i]^.reg=taicpu(p).oper[0]^.reg then
|
||||
taicpu(hp1).oper[i]^.reg:=taicpu(p).oper[1]^.reg;
|
||||
|
||||
alloc:=FindRegAllocBackward(taicpu(p).oper[0]^.reg,tai(p.Previous));
|
||||
dealloc:=FindRegDeAlloc(taicpu(p).oper[0]^.reg,tai(hp1.Next));
|
||||
|
||||
if assigned(alloc) and assigned(dealloc) then
|
||||
begin
|
||||
asml.Remove(alloc);
|
||||
alloc.Free;
|
||||
asml.Remove(dealloc);
|
||||
dealloc.Free;
|
||||
end;
|
||||
|
||||
GetNextInstruction(p,hp1);
|
||||
asml.Remove(p);
|
||||
p.free;
|
||||
p:=hp1;
|
||||
result:=true;
|
||||
end
|
||||
{ remove
|
||||
mov reg0,reg0
|
||||
}
|
||||
else if (taicpu(p).ops=2) and
|
||||
(taicpu(p).oper[0]^.typ = top_reg) and
|
||||
(taicpu(p).oper[1]^.typ = top_reg) and
|
||||
(taicpu(p).oper[0]^.reg = taicpu(p).oper[1]^.reg) then
|
||||
begin
|
||||
GetNextInstruction(p,hp1);
|
||||
asml.remove(p);
|
||||
p.free;
|
||||
p:=hp1;
|
||||
GetNextInstruction(hp1,hp1);
|
||||
result:=true;
|
||||
if not assigned(hp1) then
|
||||
break;
|
||||
end;
|
||||
end;
|
||||
end;
|
||||
end
|
||||
{ fold
|
||||
mov reg2,reg0
|
||||
mov reg3,reg1
|
||||
to
|
||||
movw reg2,reg0
|
||||
}
|
||||
else if (CPUAVR_HAS_MOVW in cpu_capabilities[current_settings.cputype]) and
|
||||
(taicpu(p).ops=2) and
|
||||
(taicpu(p).oper[0]^.typ = top_reg) and
|
||||
(taicpu(p).oper[1]^.typ = top_reg) and
|
||||
getnextinstruction(p,hp1) and
|
||||
(hp1.typ = ait_instruction) and
|
||||
(taicpu(hp1).opcode = A_MOV) and
|
||||
(taicpu(hp1).ops=2) and
|
||||
(taicpu(hp1).oper[0]^.typ = top_reg) and
|
||||
(taicpu(hp1).oper[1]^.typ = top_reg) and
|
||||
(getsupreg(taicpu(hp1).oper[0]^.reg)=getsupreg(taicpu(p).oper[0]^.reg)+1) and
|
||||
((getsupreg(taicpu(p).oper[0]^.reg) mod 2)=0) and
|
||||
((getsupreg(taicpu(p).oper[1]^.reg) mod 2)=0) and
|
||||
(getsupreg(taicpu(hp1).oper[1]^.reg)=getsupreg(taicpu(p).oper[1]^.reg)+1) then
|
||||
begin
|
||||
alloc:=FindRegAllocBackward(taicpu(hp1).oper[0]^.reg,tai(hp1.Previous));
|
||||
if assigned(alloc) then
|
||||
begin
|
||||
asml.Remove(alloc);
|
||||
asml.InsertBefore(alloc,p);
|
||||
end;
|
||||
|
||||
taicpu(p).opcode:=A_MOVW;
|
||||
asml.remove(hp1);
|
||||
hp1.free;
|
||||
result:=true;
|
||||
end
|
||||
{
|
||||
This removes the first mov from
|
||||
mov rX,...
|
||||
mov rX,...
|
||||
}
|
||||
else if taicpu(hp1).opcode=A_MOV then
|
||||
while (hp1.typ=ait_instruction) and (taicpu(hp1).opcode=A_MOV) and
|
||||
MatchOperand(taicpu(p).oper[0]^, taicpu(hp1).oper[0]^) and
|
||||
{ don't remove the first mov if the second is a mov rX,rX }
|
||||
not(MatchOperand(taicpu(hp1).oper[0]^,taicpu(hp1).oper[1]^)) do
|
||||
begin
|
||||
asml.remove(p);
|
||||
p.free;
|
||||
p:=hp1;
|
||||
GetNextInstruction(hp1,hp1);
|
||||
result:=true;
|
||||
if not assigned(hp1) then
|
||||
break;
|
||||
end;
|
||||
end;
|
||||
end;
|
||||
end;
|
||||
end;
|
||||
end;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user