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@@ -1934,6 +1934,9 @@ Begin
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continue;
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end;
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End;
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+(*
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+Optimization is not safe; xor clears the carry flag.
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+See test/tgadint64 in the test suite.
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A_MOV:
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if (Taicpu(p).oper[0].typ = Top_Const) And
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(Taicpu(p).oper[0].val = 0) And
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@@ -1943,6 +1946,7 @@ Begin
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Taicpu(p).opcode := A_XOR;
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Taicpu(p).LoadReg(0,Taicpu(p).oper[1].reg);
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End;
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+*)
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A_MOVZX:
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{ if register vars are on, it's possible there is code like }
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{ "cmpl $3,%eax; movzbl 8(%ebp),%ebx; je .Lxxx" }
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@@ -2054,7 +2058,10 @@ End.
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{
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$Log$
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- Revision 1.40 2003-02-25 07:41:54 daniel
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+ Revision 1.41 2003-02-26 13:24:59 daniel
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+ * Disabled mov reg,0 -> xor reg,reg optimization
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+
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+ Revision 1.40 2003/02/25 07:41:54 daniel
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* Properly fixed reversed operands bug
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Revision 1.39 2003/02/24 21:27:01 daniel
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daniel