[XCore] Always use the version of computeKnownBits that returns a value. NFCI.

Continues the work started by @bogner in rL340594 to remove uses of the KnownBits output paramater version.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@349915 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/XCore/XCoreISelLowering.cpp b/lib/Target/XCore/XCoreISelLowering.cpp
index 99e76144cba398b812463cef402e75274f6b7a02..75d7ae7048a117884a82d288cf8b668356b8dfa5 100644 (file)
--- a/lib/Target/XCore/XCoreISelLowering.cpp
+++ b/lib/Target/XCore/XCoreISelLowering.cpp
@@ -403,8 +403,7 @@ SDValue XCoreTargetLowering::lowerLoadWordFromAlignedBasePlusOffset(
 
 static bool isWordAligned(SDValue Value, SelectionDAG &DAG)
 {
-  KnownBits Known;
-  DAG.computeKnownBits(Value, Known);
+  KnownBits Known = DAG.computeKnownBits(Value);
   return Known.countMinTrailingZeros() >= 2;
 }
 
@@ -1649,10 +1648,9 @@ SDValue XCoreTargetLowering::PerformDAGCombine(SDNode *N,
     // fold (ladd x, 0, y) -> 0, add x, y iff carry is unused and y has only the
     // low bit set
     if (N1C && N1C->isNullValue() && N->hasNUsesOfValue(0, 1)) {
-      KnownBits Known;
       APInt Mask = APInt::getHighBitsSet(VT.getSizeInBits(),
                                          VT.getSizeInBits() - 1);
-      DAG.computeKnownBits(N2, Known);
+      KnownBits Known = DAG.computeKnownBits(N2);
       if ((Known.Zero & Mask) == Mask) {
         SDValue Carry = DAG.getConstant(0, dl, VT);
         SDValue Result = DAG.getNode(ISD::ADD, dl, VT, N0, N2);
@@ -1672,10 +1670,9 @@ SDValue XCoreTargetLowering::PerformDAGCombine(SDNode *N,
 
     // fold (lsub 0, 0, x) -> x, -x iff x has only the low bit set
     if (N0C && N0C->isNullValue() && N1C && N1C->isNullValue()) {
-      KnownBits Known;
       APInt Mask = APInt::getHighBitsSet(VT.getSizeInBits(),
                                          VT.getSizeInBits() - 1);
-      DAG.computeKnownBits(N2, Known);
+      KnownBits Known = DAG.computeKnownBits(N2);
       if ((Known.Zero & Mask) == Mask) {
         SDValue Borrow = N2;
         SDValue Result = DAG.getNode(ISD::SUB, dl, VT,
@@ -1688,10 +1685,9 @@ SDValue XCoreTargetLowering::PerformDAGCombine(SDNode *N,
     // fold (lsub x, 0, y) -> 0, sub x, y iff borrow is unused and y has only the
     // low bit set
     if (N1C && N1C->isNullValue() && N->hasNUsesOfValue(0, 1)) {
-      KnownBits Known;
       APInt Mask = APInt::getHighBitsSet(VT.getSizeInBits(),
                                          VT.getSizeInBits() - 1);
-      DAG.computeKnownBits(N2, Known);
+      KnownBits Known = DAG.computeKnownBits(N2);
       if ((Known.Zero & Mask) == Mask) {
         SDValue Borrow = DAG.getConstant(0, dl, VT);
         SDValue Result = DAG.getNode(ISD::SUB, dl, VT, N0, N2);