AMDGPU/R600: Cleanup DAGCombine

Move SDLoc initialization to comon place.
fall back to AMDGPU version in one place

Differential Revision: https://reviews.llvm.org/D23900

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280030 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/AMDGPU/R600ISelLowering.cpp

@@ -1706,14 +1706,14 @@ SDValue R600TargetLowering::OptimizeSwizzle(SDValue BuildVector, SDValue Swz[4],
 SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
                                               DAGCombinerInfo &DCI) const {
   SelectionDAG &DAG = DCI.DAG;
+  SDLoc DL(N);
 
   switch (N->getOpcode()) {
-  default: return AMDGPUTargetLowering::PerformDAGCombine(N, DCI);
   // (f32 fp_round (f64 uint_to_fp a)) -> (f32 uint_to_fp a)
   case ISD::FP_ROUND: {
       SDValue Arg = N->getOperand(0);
       if (Arg.getOpcode() == ISD::UINT_TO_FP && Arg.getValueType() == MVT::f64) {
-        return DAG.getNode(ISD::UINT_TO_FP, SDLoc(N), N->getValueType(0),
+        return DAG.getNode(ISD::UINT_TO_FP, DL, N->getValueType(0),
                            Arg.getOperand(0));
       }
       break;
@@ -1738,12 +1738,11 @@ SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
       return SDValue();
     }
 
-    SDLoc dl(N);
-    return DAG.getNode(ISD::SELECT_CC, dl, N->getValueType(0),
+    return DAG.getNode(ISD::SELECT_CC, DL, N->getValueType(0),
                            SelectCC.getOperand(0), // LHS
                            SelectCC.getOperand(1), // RHS
-                           DAG.getConstant(-1, dl, MVT::i32), // True
-                           DAG.getConstant(0, dl, MVT::i32),  // False
+                           DAG.getConstant(-1, DL, MVT::i32), // True
+                           DAG.getConstant(0, DL, MVT::i32),  // False
                            SelectCC.getOperand(4)); // CC
 
     break;
@@ -1755,7 +1754,6 @@ SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
     SDValue InVec = N->getOperand(0);
     SDValue InVal = N->getOperand(1);
     SDValue EltNo = N->getOperand(2);
-    SDLoc dl(N);
 
     // If the inserted element is an UNDEF, just use the input vector.
     if (InVal.isUndef())
@@ -1793,13 +1791,13 @@ SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
       EVT OpVT = Ops[0].getValueType();
       if (InVal.getValueType() != OpVT)
         InVal = OpVT.bitsGT(InVal.getValueType()) ?
-          DAG.getNode(ISD::ANY_EXTEND, dl, OpVT, InVal) :
-          DAG.getNode(ISD::TRUNCATE, dl, OpVT, InVal);
+          DAG.getNode(ISD::ANY_EXTEND, DL, OpVT, InVal) :
+          DAG.getNode(ISD::TRUNCATE, DL, OpVT, InVal);
       Ops[Elt] = InVal;
     }
 
     // Return the new vector
-    return DAG.getBuildVector(VT, dl, Ops);
+    return DAG.getBuildVector(VT, DL, Ops);
   }
 
   // Extract_vec (Build_vector) generated by custom lowering
@@ -1816,8 +1814,8 @@ SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
         Arg.getOperand(0).getOpcode() == ISD::BUILD_VECTOR) {
       if (ConstantSDNode *Const = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
         unsigned Element = Const->getZExtValue();
-        return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getVTList(),
-            Arg->getOperand(0).getOperand(Element));
+        return DAG.getNode(ISD::BITCAST, DL, N->getVTList(),
+                           Arg->getOperand(0).getOperand(Element));
       }
     }
     break;
@@ -1858,7 +1856,7 @@ SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
                                   LHS.getOperand(0).getValueType().isInteger());
       if (DCI.isBeforeLegalizeOps() ||
           isCondCodeLegal(LHSCC, LHS.getOperand(0).getSimpleValueType()))
-        return DAG.getSelectCC(SDLoc(N),
+        return DAG.getSelectCC(DL,
                                LHS.getOperand(0),
                                LHS.getOperand(1),
                                LHS.getOperand(2),
@@ -1885,7 +1883,6 @@ SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
       N->getOperand(6), // SWZ_Z
       N->getOperand(7) // SWZ_W
     };
-    SDLoc DL(N);
     NewArgs[1] = OptimizeSwizzle(N->getOperand(1), &NewArgs[4], DAG, DL);
     return DAG.getNode(AMDGPUISD::EXPORT, DL, N->getVTList(), NewArgs);
   }
@@ -1915,10 +1912,10 @@ SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
       N->getOperand(17),
       N->getOperand(18),
     };
-    SDLoc DL(N);
     NewArgs[1] = OptimizeSwizzle(N->getOperand(1), &NewArgs[2], DAG, DL);
     return DAG.getNode(AMDGPUISD::TEXTURE_FETCH, DL, N->getVTList(), NewArgs);
   }
+  default: break;
   }
 
   return AMDGPUTargetLowering::PerformDAGCombine(N, DCI);