[PATCH] D93243: [FPEnv][AMDGPU] Disable FSUB(-0,X)->FNEG(X) DAGCombine when subnormals are flushed

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:13375
+      DenormalMode DenormMode = DAG.getDenormalMode(VT);
+      if (DenormMode == DenormalMode::getIEEE()) {
+        if (SDValue NegN1 =
----------------
This will also change the behavior on signaling nans, which will no longer quiet


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D93243/new/

https://reviews.llvm.org/D93243