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Fix pre/postincrement operations (#3744) (#3756)

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This commit is contained in:
Ryszard Rozak
2022-11-17 13:26:45 -05:00
committed by GitHub
parent 3c77c7bb92
commit d41efb189d
5 changed files with 90 additions and 14 deletions
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src/V3LinkInc.cpp
+7 -12
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@@ -85,8 +85,6 @@ private:
} else {
nodep->v3fatalSrc("Unknown InsertMode");
}
m_insMode = IM_AFTER;
m_insStmtp = newp;
}
// VISITORS
@@ -259,21 +257,18 @@ private:
if (VN_IS(nodep, PreAdd) || VN_IS(nodep, PreSub)) {
// PreAdd/PreSub operations
// Immediately after declaration - increment it by one
m_insStmtp->addHereThisAsNext(
new AstAssign(fl, new AstVarRef(fl, varp, VAccess::WRITE), operp));
varp->addNextHere(new AstAssign{fl, new AstVarRef{fl, varrefp->varp(), VAccess::WRITE},
new AstVarRef{fl, varp, VAccess::READ}});
// Immediately after incrementing - assign it to the original variable
m_insStmtp->addHereThisAsNext(
new AstAssign(fl, new AstVarRef(fl, varrefp->varp(), VAccess::WRITE),
new AstVarRef(fl, varp, VAccess::READ)));
varp->addNextHere(new AstAssign{fl, new AstVarRef{fl, varp, VAccess::WRITE}, operp});
} else {
// PostAdd/PostSub operations
// assign the original variable to the temporary one
m_insStmtp->addHereThisAsNext(
new AstAssign(fl, new AstVarRef(fl, varp, VAccess::WRITE),
new AstVarRef(fl, varrefp->varp(), VAccess::READ)));
varp->addNextHere(
new AstAssign{fl, new AstVarRef{fl, varrefp->varp(), VAccess::WRITE}, operp});
// Increment the original variable by one
m_insStmtp->addHereThisAsNext(
new AstAssign(fl, new AstVarRef(fl, varrefp->varp(), VAccess::WRITE), operp));
varp->addNextHere(new AstAssign{fl, new AstVarRef{fl, varp, VAccess::WRITE},
new AstVarRef{fl, varrefp->varp(), VAccess::READ}});
}
// Replace the node with the temporary