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Fix reduction-or on class pointers (prep #5674)

This commit is contained in:
Wilson Snyder 2025-03-15 21:46:37 -04:00
parent 13c22690c4
commit 418fc2c246
1 changed files with 14 additions and 3 deletions
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17
src/V3Width.cpp
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@ -6890,8 +6890,9 @@ class WidthVisitor final : public VNVisitor {
void fixWidthReduce(AstNodeExpr* nodep) {
// Fix the width mismatch by adding a reduction OR operator
// IF (A(CONSTwide)) becomes IF (A(CONSTreduced))
// IF (A(somewide)) becomes IF (A(REDOR(somewide)))
// IF (A(CONSTwide)) becomes IF (A(CONSTreduced))
// IF (A(somewide)) on pointer becomes on pointer IF (A(NEQ(somewide, Null)))
// IF (A(somewide)) elsewise becomes IF (A(REDOR(somewide, 0)))
// Attempt to fix it quietly
const int expWidth = 1;
const int expSigned = false;
@ -6909,7 +6910,17 @@ class WidthVisitor final : public VNVisitor {
} else {
VNRelinker linker;
nodep->unlinkFrBack(&linker);
AstNodeExpr* const newp = new AstRedOr{nodep->fileline(), nodep};
AstNodeExpr* newp;
if (VN_IS(nodep->dtypep()->skipRefp(), ClassRefDType)) {
// Cannot use AstRedOr, as we may be redurcing a class handle
newp = new AstNeq{nodep->fileline(),
new AstConst{nodep->fileline(), AstConst::Null{}},
nodep};
} else {
// But, AstRedOr can be faster on wide
newp = new AstRedOr{nodep->fileline(), nodep};
}
linker.relink(newp);
nodep = newp;
}