vinx13 commented on code in PR #12749:
URL: https://github.com/apache/tvm/pull/12749#discussion_r970167340
##########
src/arith/rewrite_simplify.cc:
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@@ -1667,6 +1667,22 @@ PrimExpr RewriteSimplifier::Impl::VisitExpr_(const
CallNode* op) {
return match.value();
}
}
+ if (op->op.same_as(tir::builtin::if_then_else())) {
+ // Simplify nested if_then_else
+ const PrimExpr& cond = op->args[0];
+ const PrimExpr& then_expr = op->args[1];
+ const PrimExpr& else_expr = op->args[2];
+ const CallNode* inner_call = then_expr.as<CallNode>();
+ if (inner_call != nullptr &&
inner_call->op.same_as(tir::builtin::if_then_else())) {
Review Comment:
it supports multiple levels, as this mutator is recursive (`then_expr` here
is from the recursion result)
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