================
@@ -2766,6 +2766,33 @@ SDValue DAGCombiner::visitPTRADD(SDNode *N) {
}
}
+ // Transform (ptradd a, b) -> (or disjoint a, b) if it is equivalent and if
+ // that transformation can't block an offset folding at any use of the
ptradd.
+ // This should be done late, after legalization, so that it doesn't block
+ // other ptradd combines that could enable more offset folding.
+ if (LegalOperations && DAG.haveNoCommonBitsSet(N0, N1)) {
+ bool TransformCanBreakAddrMode = false;
+ if (auto *C = dyn_cast<ConstantSDNode>(N1)) {
----------------
ritter-x2a wrote:
It's not only handling the constant case, that should be clearer now, in the
updated version.
https://github.com/llvm/llvm-project/pull/146075
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