[ARM] Select result 1 from ConvertBooleanCarryToCarryFlag's result automatically. NFC

The old behavior return the value 0, which is error prone.

llvm-svn: 331614

1 files changed, 6 insertions, 4 deletions

diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 96fd214f6ea..7cd6e011beb 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -4063,8 +4063,10 @@ static SDValue ConvertBooleanCarryToCarryFlag(SDValue BoolCarry,
 
   // This converts the boolean value carry into the carry flag by doing
   // ARMISD::SUBC Carry, 1
-  return DAG.getNode(ARMISD::SUBC, DL, DAG.getVTList(CarryVT, MVT::i32),
-                     BoolCarry, DAG.getConstant(1, DL, CarryVT));
+  SDValue Carry = DAG.getNode(ARMISD::SUBC, DL,
+                              DAG.getVTList(CarryVT, MVT::i32),
+                              BoolCarry, DAG.getConstant(1, DL, CarryVT));
+  return Carry.getValue(1);
 }
 
 static SDValue ConvertCarryFlagToBooleanCarry(SDValue Flags, EVT VT,
@@ -7762,7 +7764,7 @@ static SDValue LowerADDSUBCARRY(SDValue Op, SelectionDAG &DAG) {
 
     // Do the addition proper using the carry flag we wanted.
     Result = DAG.getNode(ARMISD::ADDE, DL, VTs, Op.getOperand(0),
-                         Op.getOperand(1), Carry.getValue(1));
+                         Op.getOperand(1), Carry);
 
     // Now convert the carry flag into a boolean value.
     Carry = ConvertCarryFlagToBooleanCarry(Result.getValue(1), VT, DAG);
@@ -7776,7 +7778,7 @@ static SDValue LowerADDSUBCARRY(SDValue Op, SelectionDAG &DAG) {
 
     // Do the subtraction proper using the carry flag we wanted.
     Result = DAG.getNode(ARMISD::SUBE, DL, VTs, Op.getOperand(0),
-                         Op.getOperand(1), Carry.getValue(1));
+                         Op.getOperand(1), Carry);
 
     // Now convert the carry flag into a boolean value.
     Carry = ConvertCarryFlagToBooleanCarry(Result.getValue(1), VT, DAG);