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fixes #6255, add system.ashr arithmetic right shift (#8547)

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andri lim 2018-08-07 23:41:30 +07:00 • committed by Andreas Rumpf
commit 4d5cce9882
13 changed files with 95 additions and 12 deletions
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8
compiler/semfold.nim
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@ -268,6 +268,14 @@ proc evalOp(m: TMagic, n, a, b, c: PNode; g: ModuleGraph): PNode =
of tyInt64, tyInt, tyUInt..tyUInt64:
result = newIntNodeT(`shr`(getInt(a), getInt(b)), n, g)
else: internalError(g.config, n.info, "constant folding for shr")
of mAshrI:
case skipTypes(n.typ, abstractRange).kind
of tyInt8: result = newIntNodeT(ashr(int8(getInt(a)), int8(getInt(b))), n, g)
of tyInt16: result = newIntNodeT(ashr(int16(getInt(a)), int16(getInt(b))), n, g)
of tyInt32: result = newIntNodeT(ashr(int32(getInt(a)), int32(getInt(b))), n, g)
of tyInt64, tyInt:
result = newIntNodeT(ashr(getInt(a), getInt(b)), n, g)
else: internalError(g.config, n.info, "constant folding for ashr")
of mDivI: result = foldDiv(getInt(a), getInt(b), n, g)
of mModI: result = foldMod(getInt(a), getInt(b), n, g)
of mAddF64: result = newFloatNodeT(getFloat(a) + getFloat(b), n, g)