diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 7053e596237..c006bd9c5e5 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -550,7 +550,7 @@ bool TargetLowering::SimplifyDemandedBits( if (Depth != 0) { // If not at the root, Just compute the Known bits to // simplify things downstream. - TLO.DAG.computeKnownBits(Op, Known, DemandedElts, Depth); + Known = TLO.DAG.computeKnownBits(Op, DemandedElts, Depth); return false; } // If this is the root being simplified, allow it to have multiple uses, @@ -666,9 +666,8 @@ bool TargetLowering::SimplifyDemandedBits( // simplify the LHS, here we're using information from the LHS to simplify // the RHS. if (ConstantSDNode *RHSC = isConstOrConstSplat(Op1)) { - KnownBits LHSKnown; // Do not increment Depth here; that can cause an infinite loop. - TLO.DAG.computeKnownBits(Op0, LHSKnown, DemandedElts, Depth); + KnownBits LHSKnown = TLO.DAG.computeKnownBits(Op0, DemandedElts, Depth); // If the LHS already has zeros where RHSC does, this 'and' is dead. if ((LHSKnown.Zero & DemandedBits) == (~RHSC->getAPIntValue() & DemandedBits)) @@ -1381,7 +1380,7 @@ bool TargetLowering::SimplifyDemandedBits( // If this is a bitcast, let computeKnownBits handle it. Only do this on a // recursive call where Known may be useful to the caller. if (Depth > 0) { - TLO.DAG.computeKnownBits(Op, Known, Depth); + Known = TLO.DAG.computeKnownBits(Op, Depth); return false; } break; @@ -1442,7 +1441,7 @@ bool TargetLowering::SimplifyDemandedBits( } // Just use computeKnownBits to compute output bits. - TLO.DAG.computeKnownBits(Op, Known, DemandedElts, Depth); + Known = TLO.DAG.computeKnownBits(Op, DemandedElts, Depth); break; } |
