[ThumbRegisterInfo] Use getSigned() for constant pool loads

To match the signed int parameter for the value.

Author: nikic

llvm/lib/Target/ARM/ThumbRegisterInfo.cpp

@@ -66,8 +66,8 @@ static void emitThumb1LoadConstPool(MachineBasicBlock &MBB,
   const ARMSubtarget &STI = MF.getSubtarget<ARMSubtarget>();
   const TargetInstrInfo &TII = *STI.getInstrInfo();
   MachineConstantPool *ConstantPool = MF.getConstantPool();
-  const Constant *C = ConstantInt::get(
-          Type::getInt32Ty(MBB.getParent()->getFunction().getContext()), Val);
+  const Constant *C = ConstantInt::getSigned(
+      Type::getInt32Ty(MBB.getParent()->getFunction().getContext()), Val);
   unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align(4));
 
   BuildMI(MBB, MBBI, dl, TII.get(ARM::tLDRpci))
@@ -85,8 +85,8 @@ static void emitThumb2LoadConstPool(MachineBasicBlock &MBB,
   MachineFunction &MF = *MBB.getParent();
   const TargetInstrInfo &TII = *MF.getSubtarget().getInstrInfo();
   MachineConstantPool *ConstantPool = MF.getConstantPool();
-  const Constant *C = ConstantInt::get(
-           Type::getInt32Ty(MBB.getParent()->getFunction().getContext()), Val);
+  const Constant *C = ConstantInt::getSigned(
+      Type::getInt32Ty(MBB.getParent()->getFunction().getContext()), Val);
   unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align(4));
 
   BuildMI(MBB, MBBI, dl, TII.get(ARM::t2LDRpci))