[XTensa] Use getSignedConstant() for negative values

Author: nikic

llvm/lib/Target/Xtensa/XtensaISelLowering.cpp

@@ -845,7 +845,7 @@ SDValue XtensaTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
   SDValue SizeTmp =
       DAG.getNode(ISD::ADD, DL, VT, Size, DAG.getConstant(31, DL, MVT::i32));
   SDValue SizeRoundUp = DAG.getNode(ISD::AND, DL, VT, SizeTmp,
-                                    DAG.getConstant(~31, DL, MVT::i32));
+                                    DAG.getSignedConstant(~31, DL, MVT::i32));
 
   unsigned SPReg = Xtensa::SP;
   SDValue SP = DAG.getCopyFromReg(Chain, DL, SPReg, VT);
@@ -873,7 +873,7 @@ SDValue XtensaTargetLowering::LowerShiftLeftParts(SDValue Op,
   //   Lo = 0
   //   Hi = Lo << (Shamt - register size)
 
-  SDValue MinusRegisterSize = DAG.getConstant(-32, DL, VT);
+  SDValue MinusRegisterSize = DAG.getSignedConstant(-32, DL, VT);
   SDValue ShamtMinusRegisterSize =
       DAG.getNode(ISD::ADD, DL, VT, Shamt, MinusRegisterSize);
 
@@ -914,7 +914,7 @@ SDValue XtensaTargetLowering::LowerShiftRightParts(SDValue Op,
   //     Hi = 0;
 
   unsigned ShiftRightOp = IsSRA ? ISD::SRA : ISD::SRL;
-  SDValue MinusRegisterSize = DAG.getConstant(-32, DL, VT);
+  SDValue MinusRegisterSize = DAG.getSignedConstant(-32, DL, VT);
   SDValue RegisterSizeMinus1 = DAG.getConstant(32 - 1, DL, VT);
   SDValue ShamtMinusRegisterSize =
       DAG.getNode(ISD::ADD, DL, VT, Shamt, MinusRegisterSize);