fold truncusat(fp_to_uint_sat (x)) -> fp_to_uint_sat(x)

llvm · Jul 21, 2024 · 197e28b · 197e28b
1 parent 108a26c
commit 197e28b
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -14886,6 +14886,11 @@ SDValue DAGCombiner::visitTRUNCATE_USAT(SDNode *N) {
                               FPInstr.getOperand(0),
                               DAG.getValueType(VT.getScalarType()));
     return Sat;
+  } else if (FPInstr.getOpcode() == ISD::FP_TO_UINT_SAT) {
+    SDValue Sat = DAG.getNode(ISD::FP_TO_UINT_SAT, SDLoc(FPInstr), VT,
+                              FPInstr.getOperand(0),
+                              DAG.getValueType(VT.getScalarType()));
+    return Sat;
   }
 
   return SDValue();