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Fix internal error on unique casez with --assert, bug1117.

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This commit is contained in:
Wilson Snyder
2016-12-03 14:49:51 -05:00
parent 77fe33e57f
commit 9b06310cbe
4 changed files with 67 additions and 3 deletions
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src/V3Assert.cpp
+20 -3
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@@ -245,9 +245,26 @@ private:
AstNode* propp = NULL;
for (AstCaseItem* itemp = nodep->itemsp(); itemp; itemp=itemp->nextp()->castCaseItem()) {
for (AstNode* icondp = itemp->condsp(); icondp!=NULL; icondp=icondp->nextp()) {
AstNode* onep = new AstEq(icondp->fileline(),
nodep->exprp()->cloneTree(false),
icondp->cloneTree(false));
AstNode* onep;
AstConst* iconstp = icondp->castConst();
if (iconstp && iconstp->num().isFourState()
&& (nodep->casex() || nodep->casez() || nodep->caseInside())) {
V3Number nummask (itemp->fileline(), iconstp->width());
nummask.opBitsNonX(iconstp->num());
V3Number numval (itemp->fileline(), iconstp->width());
numval.opBitsOne(iconstp->num());
AstNode* and1p = new AstAnd(itemp->fileline(), nodep->exprp()->cloneTree(false),
new AstConst(itemp->fileline(), nummask));
AstNode* and2p = new AstAnd(itemp->fileline(),
new AstConst(itemp->fileline(), numval),
new AstConst(itemp->fileline(), nummask));
onep = AstEq::newTyped(itemp->fileline(), and1p, and2p);
} else {
onep = AstEq::newTyped(icondp->fileline(),
nodep->exprp()->cloneTree(false),
icondp->cloneTree(false));
}
if (propp) propp = new AstConcat(icondp->fileline(), onep, propp);
else propp = onep;
}