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Support $countbits (#2287)

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This commit is contained in:
Yossi Nivin
2020-05-10 14:27:22 -04:00
committed by GitHub
parent 070bcddf5a
commit f9a0cf0cff
22 changed files with 441 additions and 9 deletions
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src/V3Const.cpp
+9
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@@ -664,6 +664,14 @@ private:
UINFO(4, "TRICONST -> " << num << endl);
VL_DO_DANGLING(replaceNum(nodep, num), nodep);
}
void replaceConst(AstNodeQuadop* nodep) {
V3Number num(nodep, nodep->width());
nodep->numberOperate(
num, VN_CAST(nodep->lhsp(), Const)->num(), VN_CAST(nodep->rhsp(), Const)->num(),
VN_CAST(nodep->thsp(), Const)->num(), VN_CAST(nodep->fhsp(), Const)->num());
UINFO(4, "QUADCONST -> " << num << endl);
VL_DO_DANGLING(replaceNum(nodep, num), nodep);
}
void replaceConstString(AstNode* oldp, const string& num) {
// Replace oldp node with a constant set to specified value
@@ -2258,6 +2266,7 @@ private:
// Generic constants on both side. Do this first to avoid other replacements
TREEOPC("AstNodeBiop {$lhsp.castConst, $rhsp.castConst}", "replaceConst(nodep)");
TREEOPC("AstNodeUniop{$lhsp.castConst, !nodep->isOpaque()}", "replaceConst(nodep)");
TREEOPC("AstNodeQuadop{$lhsp.castConst, $rhsp.castConst, $thsp.castConst, $fhsp.castConst}", "replaceConst(nodep)");
// Zero on one side or the other
TREEOP ("AstAdd {$lhsp.isZero, $rhsp}", "replaceWRhs(nodep)");
TREEOP ("AstAnd {$lhsp.isZero, $rhsp, isTPure($rhsp)}", "replaceZero(nodep)"); // Can't use replaceZeroChkPure as we make this pattern in ChkPure