[llvm] 2c3a4a9 - [DAG] SelectionDAG::GetDemandedBits - don't recurse back into GetDemandedBits

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2022-06-22T13:48:57+01:00
New Revision: 2c3a4a9334ea0881e79644ed9c25dde442ec22d2

URL: https://github.com/llvm/llvm-project/commit/2c3a4a9334ea0881e79644ed9c25dde442ec22d2
DIFF: https://github.com/llvm/llvm-project/commit/2c3a4a9334ea0881e79644ed9c25dde442ec22d2.diff

LOG: [DAG] SelectionDAG::GetDemandedBits - don't recurse back into GetDemandedBits

Another minor cleanup as we work toward removing GetDemandedBits entirely - call SimplifyMultipleUseDemandedBits directly.

Added: 
    

Modified: 
    llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index c2820c1c9902..213874fb4933 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2491,8 +2491,8 @@ SDValue SelectionDAG::GetDemandedBits(SDValue V, const APInt &DemandedBits) {
       if (Amt >= DemandedBits.getBitWidth())
         break;
       APInt SrcDemandedBits = DemandedBits << Amt;
-      if (SDValue SimplifyLHS =
-              GetDemandedBits(V.getOperand(0), SrcDemandedBits))
+      if (SDValue SimplifyLHS = TLI->SimplifyMultipleUseDemandedBits(
+              V.getOperand(0), SrcDemandedBits, *this))
         return getNode(ISD::SRL, SDLoc(V), V.getValueType(), SimplifyLHS,
                        V.getOperand(1));
     }