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Revert fixed point (#8147 revert) (#8155) 86b7cfb05c

This commit is contained in:
Wilson Snyder 2026-08-19 07:54:42 -04:00
parent 700858c112
commit f88b59f39f
2 changed files with 5 additions and 5 deletions
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1
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@ -47,7 +47,6 @@ Verilator 5.051 devel
* Optimize temporary insertion for single bit replicates in DFG (#8110). [Geza Lore, Testorrent USA, Inc.]
* Optimize mtask coarsening in multi-threaded scheduling (#8120). [Geza Lore, Testorrent USA, Inc.]
* Optimize NFA delay-ring edge traversal, drop complexity to linear (#8145). [Artur Bieniek, Antmicro Ltd.]
* Optimize associative constant patterns to fixed point (#8147). [Geza Lore, Testorrent USA, Inc.]
* Fix $finish continuing event loop (#7267) (#7950). [Artur Bieniek, Antmicro Ltd.]
* Fix $display accepting streaming concat arguments (#7663) (#7890). [Jaeuk Lee]
* Fix DFG misoptimizing bound checks (#7755). [Jakub Michalski]

9
src/V3Const.cpp
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@ -1709,7 +1709,8 @@ class ConstVisitor final : public VNVisitor {
const V3Number num{constp, subsize, constp->num()};
nodep->lhsp(new AstConst{constp->fileline(), num});
VL_DO_DANGLING(pushDeletep(constp), constp);
return false; // input node is still valid, keep going
UINFOTREE(9, nodep, "", "BI(EXTEND)-ou");
return true;
}
bool operandBiExtendConstOver(const AstNodeBiop* nodep) {
// EQ(const{width32}, EXTEND(xx{width3})) -> constant
@ -2069,7 +2070,7 @@ class ConstVisitor final : public VNVisitor {
rp->rhsp(bp);
rp->dtypeFrom(nodep); // Upper widthMin more likely correct
if (VN_IS(rp->lhsp(), Const) && VN_IS(rp->rhsp(), Const)) replaceConst(rp);
iterate(nodep); // Proceed to fixed point
// UINFOTREE(1, nodep, "", "repAsvConst_new");
}
void replaceAsvLUp(AstNodeBiop* nodep) {
// BIASV(BIASV(CONSTll,lr),r) -> BIASV(CONSTll,BIASV(lr,r))
@ -2082,7 +2083,7 @@ class ConstVisitor final : public VNVisitor {
lp->lhsp(lrp);
lp->rhsp(rp);
lp->dtypeFrom(nodep); // Upper widthMin more likely correct
iterate(nodep); // Proceed to fixed point
// UINFOTREE(1, nodep, "", "repAsvLUp_new");
}
void replaceAsvRUp(AstNodeBiop* nodep) {
// BIASV(l,BIASV(CONSTrl,rr)) -> BIASV(CONSTrl,BIASV(l,rr))
@ -2095,7 +2096,7 @@ class ConstVisitor final : public VNVisitor {
rp->lhsp(lp);
rp->rhsp(rrp);
rp->dtypeFrom(nodep); // Upper widthMin more likely correct
iterate(nodep); // Proceed to fixed point
// UINFOTREE(1, nodep, "", "repAsvRUp_new");
}
void replaceAndOr(AstNodeBiop* nodep) {
// OR (AND (CONSTll,lr), AND(CONSTrl==ll,rr)) -> AND (CONSTll, OR(lr,rr))