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view dmd/expression/shift_optimize.d @ 179:cd48cb899aee
Updated to dmd2.040
author | korDen |
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date | Sun, 17 Oct 2010 20:56:07 +0400 |
parents | e28b18c23469 |
children |
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module dmd.expression.shift_optimize; import dmd.common; import dmd.Expression; import dmd.BinExp; import dmd.Type; import dmd.IntegerExp; Expression shift_optimize(int result, BinExp e, Expression function(Type, Expression, Expression) shift) { Expression ex = e; e.e1 = e.e1.optimize(result); e.e2 = e.e2.optimize(result); if (e.e2.isConst() == 1) { long i2 = e.e2.toInteger(); ulong sz = e.e1.type.size() * 8; if (i2 < 0 || i2 > sz) { e.error("shift by %jd is outside the range 0..%zu", i2, sz); e.e2 = new IntegerExp(0); } if (e.e1.isConst() == 1) { ex = shift(e.type, e.e1, e.e2); } } return ex; }