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Fix shift of > 32-bit number (#4719).

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This commit is contained in:
Wilson Snyder
2023-11-27 21:41:32 -05:00
parent a022b672a0
commit 7167d4bdc0
9 changed files with 43 additions and 40 deletions
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src/V3Const.cpp
+6 -3
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@@ -1221,13 +1221,16 @@ class ConstVisitor final : public VNVisitor {
}
bool operandHugeShiftL(const AstNodeBiop* nodep) {
return (VN_IS(nodep->rhsp(), Const) && !VN_AS(nodep->rhsp(), Const)->num().isFourState()
&& (VN_AS(nodep->rhsp(), Const)->toUInt() >= static_cast<uint32_t>(nodep->width()))
&& (!VN_AS(nodep->rhsp(), Const)->num().fitsInUInt() // > 2^32 shift
|| (VN_AS(nodep->rhsp(), Const)->toUInt()
>= static_cast<uint32_t>(nodep->width())))
&& nodep->lhsp()->isPure());
}
bool operandHugeShiftR(const AstNodeBiop* nodep) {
return (VN_IS(nodep->rhsp(), Const) && !VN_AS(nodep->rhsp(), Const)->num().isFourState()
&& (VN_AS(nodep->rhsp(), Const)->toUInt()
>= static_cast<uint32_t>(nodep->lhsp()->width()))
&& (!VN_AS(nodep->rhsp(), Const)->num().fitsInUInt() // > 2^32 shift
|| (VN_AS(nodep->rhsp(), Const)->toUInt()
>= static_cast<uint32_t>(nodep->lhsp()->width())))
&& nodep->lhsp()->isPure());
}
bool operandIsTwo(const AstNode* nodep) {