Reapply r235977 "[DebugInfo] Add debug locations to constant SD nodes"

[DebugInfo] Add debug locations to constant SD nodes

This adds debug location to constant nodes of Selection DAG and updates
all places that create constants to pass debug locations
(see PR13269).

Can't guarantee that all locations are correct, but in a lot of cases choice
is obvious, so most of them should be. At least all tests pass.

Tests for these changes do not cover everything, instead just check it for
SDNodes, ARM and AArch64 where it's easy to get incorrect locations on
constants.

This is not complete fix as FastISel contains workaround for wrong debug
locations, which drops locations from instructions on processing constants,
but there isn't currently a way to use debug locations from constants there
as llvm::Constant doesn't cache it (yet). Although this is a bit different
issue, not directly related to these changes.

Differential Revision: http://reviews.llvm.org/D9084

llvm-svn: 235989
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
index 408d5ed..8db819e 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
@@ -407,7 +407,7 @@
   if ((VT.isFloatingPoint() && NVT.isFloatingPoint()) ||
       (VT.isVector() && VT.getVectorElementType().isFloatingPoint() &&
        NVT.isVector() && NVT.getVectorElementType().isFloatingPoint()))
-    return DAG.getNode(ISD::FP_ROUND, dl, VT, Op, DAG.getIntPtrConstant(0));
+    return DAG.getNode(ISD::FP_ROUND, dl, VT, Op, DAG.getIntPtrConstant(0, dl));
   else
     return DAG.getNode(ISD::BITCAST, dl, VT, Op);
 }
@@ -536,7 +536,8 @@
       RemainingBytes -= LoadBytes;
       Offset += LoadBytes;
       BasePTR = DAG.getNode(ISD::ADD, dl, BasePTR.getValueType(), BasePTR,
-                            DAG.getConstant(LoadBytes, BasePTR.getValueType()));
+                            DAG.getConstant(LoadBytes, dl,
+                                            BasePTR.getValueType()));
 
       LoadVals.push_back(ScalarLoad.getValue(0));
       LoadChains.push_back(ScalarLoad.getValue(1));
@@ -544,7 +545,7 @@
 
     // Extract bits, pack and extend/trunc them into destination type.
     unsigned SrcEltBits = SrcEltVT.getSizeInBits();
-    SDValue SrcEltBitMask = DAG.getConstant((1U << SrcEltBits) - 1, WideVT);
+    SDValue SrcEltBitMask = DAG.getConstant((1U << SrcEltBits) - 1, dl, WideVT);
 
     unsigned BitOffset = 0;
     unsigned WideIdx = 0;
@@ -554,7 +555,7 @@
       SDValue Lo, Hi, ShAmt;
 
       if (BitOffset < WideBits) {
-        ShAmt = DAG.getConstant(BitOffset, TLI.getShiftAmountTy(WideVT));
+        ShAmt = DAG.getConstant(BitOffset, dl, TLI.getShiftAmountTy(WideVT));
         Lo = DAG.getNode(ISD::SRL, dl, WideVT, LoadVals[WideIdx], ShAmt);
         Lo = DAG.getNode(ISD::AND, dl, WideVT, Lo, SrcEltBitMask);
       }
@@ -564,7 +565,7 @@
         WideIdx++;
         BitOffset -= WideBits;
         if (BitOffset > 0) {
-          ShAmt = DAG.getConstant(SrcEltBits - BitOffset,
+          ShAmt = DAG.getConstant(SrcEltBits - BitOffset, dl,
                                   TLI.getShiftAmountTy(WideVT));
           Hi = DAG.getNode(ISD::SHL, dl, WideVT, LoadVals[WideIdx], ShAmt);
           Hi = DAG.getNode(ISD::AND, dl, WideVT, Hi, SrcEltBitMask);
@@ -583,7 +584,7 @@
         Lo = DAG.getZExtOrTrunc(Lo, dl, DstEltVT);
         break;
       case ISD::SEXTLOAD:
-        ShAmt = DAG.getConstant(WideBits - SrcEltBits,
+        ShAmt = DAG.getConstant(WideBits - SrcEltBits, dl,
                                 TLI.getShiftAmountTy(WideVT));
         Lo = DAG.getNode(ISD::SHL, dl, WideVT, Lo, ShAmt);
         Lo = DAG.getNode(ISD::SRA, dl, WideVT, Lo, ShAmt);
@@ -604,7 +605,7 @@
                 MinAlign(LD->getAlignment(), Idx * Stride), LD->getAAInfo());
 
       BasePTR = DAG.getNode(ISD::ADD, dl, BasePTR.getValueType(), BasePTR,
-                         DAG.getConstant(Stride, BasePTR.getValueType()));
+                         DAG.getConstant(Stride, dl, BasePTR.getValueType()));
 
       Vals.push_back(ScalarLoad.getValue(0));
       LoadChains.push_back(ScalarLoad.getValue(1));
@@ -655,7 +656,7 @@
   SmallVector<SDValue, 8> Stores;
   for (unsigned Idx = 0; Idx < NumElem; Idx++) {
     SDValue Ex = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
-               RegSclVT, Value, DAG.getConstant(Idx, TLI.getVectorIdxTy()));
+               RegSclVT, Value, DAG.getConstant(Idx, dl, TLI.getVectorIdxTy()));
 
     // This scalar TruncStore may be illegal, but we legalize it later.
     SDValue Store = DAG.getTruncStore(Chain, dl, Ex, BasePTR,
@@ -664,7 +665,7 @@
                AAInfo);
 
     BasePTR = DAG.getNode(ISD::ADD, dl, BasePTR.getValueType(), BasePTR,
-                               DAG.getConstant(Stride, BasePTR.getValueType()));
+                          DAG.getConstant(Stride, dl, BasePTR.getValueType()));
 
     Stores.push_back(Store);
   }
@@ -734,8 +735,9 @@
   EVT BitTy = MaskTy.getScalarType();
 
   Mask = DAG.getSelect(DL, BitTy, Mask,
-          DAG.getConstant(APInt::getAllOnesValue(BitTy.getSizeInBits()), BitTy),
-          DAG.getConstant(0, BitTy));
+          DAG.getConstant(APInt::getAllOnesValue(BitTy.getSizeInBits()), DL,
+                          BitTy),
+          DAG.getConstant(0, DL, BitTy));
 
   // Broadcast the mask so that the entire vector is all-one or all zero.
   SmallVector<SDValue, 8> Ops(NumElem, Mask);
@@ -748,7 +750,7 @@
   Op2 = DAG.getNode(ISD::BITCAST, DL, MaskTy, Op2);
 
   SDValue AllOnes = DAG.getConstant(
-            APInt::getAllOnesValue(BitTy.getSizeInBits()), MaskTy);
+            APInt::getAllOnesValue(BitTy.getSizeInBits()), DL, MaskTy);
   SDValue NotMask = DAG.getNode(ISD::XOR, DL, MaskTy, Mask, AllOnes);
 
   Op1 = DAG.getNode(ISD::AND, DL, MaskTy, Op1, Mask);
@@ -770,7 +772,7 @@
 
   unsigned BW = VT.getScalarType().getSizeInBits();
   unsigned OrigBW = OrigTy.getScalarType().getSizeInBits();
-  SDValue ShiftSz = DAG.getConstant(BW - OrigBW, VT);
+  SDValue ShiftSz = DAG.getConstant(BW - OrigBW, DL, VT);
 
   Op = Op.getOperand(0);
   Op =   DAG.getNode(ISD::SHL, DL, VT, Op, ShiftSz);
@@ -817,7 +819,7 @@
   // without full scalarization than the sign extension does.
   unsigned EltWidth = VT.getVectorElementType().getSizeInBits();
   unsigned SrcEltWidth = SrcVT.getVectorElementType().getSizeInBits();
-  SDValue ShiftAmount = DAG.getConstant(EltWidth - SrcEltWidth, VT);
+  SDValue ShiftAmount = DAG.getConstant(EltWidth - SrcEltWidth, DL, VT);
   return DAG.getNode(ISD::SRA, DL, VT,
                      DAG.getNode(ISD::SHL, DL, VT, Op, ShiftAmount),
                      ShiftAmount);
@@ -836,7 +838,7 @@
 
   // Build up a zero vector to blend into this one.
   EVT SrcScalarVT = SrcVT.getScalarType();
-  SDValue ScalarZero = DAG.getTargetConstant(0, SrcScalarVT);
+  SDValue ScalarZero = DAG.getTargetConstant(0, DL, SrcScalarVT);
   SmallVector<SDValue, 4> BuildVectorOperands(NumSrcElements, ScalarZero);
   SDValue Zero = DAG.getNode(ISD::BUILD_VECTOR, DL, SrcVT, BuildVectorOperands);
 
@@ -917,7 +919,7 @@
   Op2 = DAG.getNode(ISD::BITCAST, DL, VT, Op2);
 
   SDValue AllOnes = DAG.getConstant(
-    APInt::getAllOnesValue(VT.getScalarType().getSizeInBits()), VT);
+    APInt::getAllOnesValue(VT.getScalarType().getSizeInBits()), DL, VT);
   SDValue NotMask = DAG.getNode(ISD::XOR, DL, VT, Mask, AllOnes);
 
   Op1 = DAG.getNode(ISD::AND, DL, VT, Op1, Mask);
@@ -940,16 +942,16 @@
       "Elements in vector-UINT_TO_FP must be 32 or 64 bits wide");
 
   unsigned BW = SVT.getSizeInBits();
-  SDValue HalfWord = DAG.getConstant(BW/2, VT);
+  SDValue HalfWord = DAG.getConstant(BW/2, DL, VT);
 
   // Constants to clear the upper part of the word.
   // Notice that we can also use SHL+SHR, but using a constant is slightly
   // faster on x86.
   uint64_t HWMask = (SVT.getSizeInBits()==64)?0x00000000FFFFFFFF:0x0000FFFF;
-  SDValue HalfWordMask = DAG.getConstant(HWMask, VT);
+  SDValue HalfWordMask = DAG.getConstant(HWMask, DL, VT);
 
   // Two to the power of half-word-size.
-  SDValue TWOHW = DAG.getConstantFP((1<<(BW/2)), Op.getValueType());
+  SDValue TWOHW = DAG.getConstantFP(1 << (BW/2), DL, Op.getValueType());
 
   // Clear upper part of LO, lower HI
   SDValue HI = DAG.getNode(ISD::SRL, DL, VT, Op.getOperand(0), HalfWord);
@@ -968,8 +970,9 @@
 
 SDValue VectorLegalizer::ExpandFNEG(SDValue Op) {
   if (TLI.isOperationLegalOrCustom(ISD::FSUB, Op.getValueType())) {
-    SDValue Zero = DAG.getConstantFP(-0.0, Op.getValueType());
-    return DAG.getNode(ISD::FSUB, SDLoc(Op), Op.getValueType(),
+    SDLoc DL(Op);
+    SDValue Zero = DAG.getConstantFP(-0.0, DL, Op.getValueType());
+    return DAG.getNode(ISD::FSUB, DL, Op.getValueType(),
                        Zero, Op.getOperand(0));
   }
   return DAG.UnrollVectorOp(Op.getNode());
@@ -985,16 +988,16 @@
   SmallVector<SDValue, 8> Ops(NumElems);
   for (unsigned i = 0; i < NumElems; ++i) {
     SDValue LHSElem = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, TmpEltVT, LHS,
-                                  DAG.getConstant(i, TLI.getVectorIdxTy()));
+                                  DAG.getConstant(i, dl, TLI.getVectorIdxTy()));
     SDValue RHSElem = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, TmpEltVT, RHS,
-                                  DAG.getConstant(i, TLI.getVectorIdxTy()));
+                                  DAG.getConstant(i, dl, TLI.getVectorIdxTy()));
     Ops[i] = DAG.getNode(ISD::SETCC, dl,
                          TLI.getSetCCResultType(*DAG.getContext(), TmpEltVT),
                          LHSElem, RHSElem, CC);
     Ops[i] = DAG.getSelect(dl, EltVT, Ops[i],
                            DAG.getConstant(APInt::getAllOnesValue
-                                           (EltVT.getSizeInBits()), EltVT),
-                           DAG.getConstant(0, EltVT));
+                                           (EltVT.getSizeInBits()), dl, EltVT),
+                           DAG.getConstant(0, dl, EltVT));
   }
   return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, Ops);
 }