[llvm] r349915 - [XCore] Always use the version of computeKnownBits that returns a value. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Fri Dec 21 07:35:32 2018
New Revision: 349915

URL: http://llvm.org/viewvc/llvm-project?rev=349915&view=rev
Log:
[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.

Modified:
    llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp

Modified: llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp?rev=349915&r1=349914&r2=349915&view=diff
==============================================================================
--- llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp Fri Dec 21 07:35:32 2018
@@ -403,8 +403,7 @@ SDValue XCoreTargetLowering::lowerLoadWo
 
 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::PerformDAGC
     // 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::PerformDAGC
 
     // 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::PerformDAGC
     // 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);