Add UNUSEDLOOP when unused loop is removed (#4926)

2026-10-08 02:53:12 +02:00 · 2024-03-07 08:33:49 -05:00
parent 6db149c588
commit 32f288084a
11 changed files with 396 additions and 21 deletions
@@ -3300,6 +3300,9 @@ class ConstVisitor final : public VNVisitor {
                if (nodep->precondsp()) {
                    nodep->replaceWith(nodep->precondsp());
                } else {
+                    nodep->v3warn(UNUSEDLOOP,
+                                  "Loop condition is always false; body will never execute");
+                    nodep->fileline()->modifyWarnOff(V3ErrorCode::UNUSEDLOOP, true);
                    nodep->unlinkFrBack();
                }
                VL_DO_DANGLING(pushDeletep(nodep), nodep);