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@@ -755,6 +755,35 @@ Implementation
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end;
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A_MOV:
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begin
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+ { change
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+ mov reg0, reg1
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+ dealloc reg0
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+ into
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+ dealloc reg0
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+ }
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+ if MatchOpType(taicpu(p),top_reg,top_reg) then
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+ begin
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+ CopyUsedRegs(TmpUsedRegs);
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+ UpdateUsedRegs(TmpUsedRegs,tai(p.Next));
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+ if not(RegInUsedRegs(taicpu(p).oper[0]^.reg,TmpUsedRegs)) and
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+ { reg. allocation information before calls is not perfect, so don't do this before
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+ calls/icalls }
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+ GetNextInstruction(p,hp1) and
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+ not(MatchInstruction(hp1,[A_CALL,A_RCALL])) then
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+ begin
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+ GetNextInstruction(p,hp1);
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+ DebugMsg('Peephole Mov2Nop performed', p);
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+ UpdateUsedRegs(tai(p.Next));
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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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+ ReleaseUsedRegs(TmpUsedRegs);
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+ exit;
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+ end;
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+ ReleaseUsedRegs(TmpUsedRegs);
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+ end;
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+
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{ turn
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mov reg0, reg1
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<op> reg2,reg0
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florian