[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: 235977

1 files changed, 12 insertions, 8 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 056ba4a4198..7213a5b9318 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -1710,11 +1710,10 @@ bool SelectionDAGISel::CheckOrMask(SDValue LHS, ConstantSDNode *RHS,
   return false;
 }
 
-
 /// SelectInlineAsmMemoryOperands - Calls to this are automatically generated
 /// by tblgen.  Others should not call it.
 void SelectionDAGISel::
-SelectInlineAsmMemoryOperands(std::vector<SDValue> &Ops) {
+SelectInlineAsmMemoryOperands(std::vector<SDValue> &Ops, SDLoc DL) {
   std::vector<SDValue> InOps;
   std::swap(InOps, Ops);
 
@@ -1760,7 +1759,7 @@ SelectInlineAsmMemoryOperands(std::vector<SDValue> &Ops) {
       // Add this to the output node.
       unsigned NewFlags =
         InlineAsm::getFlagWord(InlineAsm::Kind_Mem, SelOps.size());
-      Ops.push_back(CurDAG->getTargetConstant(NewFlags, MVT::i32));
+      Ops.push_back(CurDAG->getTargetConstant(NewFlags, DL, MVT::i32));
       Ops.insert(Ops.end(), SelOps.begin(), SelOps.end());
       i += 2;
     }
@@ -1906,11 +1905,13 @@ bool SelectionDAGISel::IsLegalToFold(SDValue N, SDNode *U, SDNode *Root,
 }
 
 SDNode *SelectionDAGISel::Select_INLINEASM(SDNode *N) {
+  SDLoc DL(N);
+
   std::vector<SDValue> Ops(N->op_begin(), N->op_end());
-  SelectInlineAsmMemoryOperands(Ops);
+  SelectInlineAsmMemoryOperands(Ops, DL);
 
   const EVT VTs[] = {MVT::Other, MVT::Glue};
-  SDValue New = CurDAG->getNode(ISD::INLINEASM, SDLoc(N), VTs, Ops);
+  SDValue New = CurDAG->getNode(ISD::INLINEASM, DL, VTs, Ops);
   New->setNodeId(-1);
   return New.getNode();
 }
@@ -2932,7 +2933,8 @@ SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
       if (Val & 128)
         Val = GetVBR(Val, MatcherTable, MatcherIndex);
       RecordedNodes.push_back(std::pair<SDValue, SDNode*>(
-                              CurDAG->getTargetConstant(Val, VT), nullptr));
+                              CurDAG->getTargetConstant(Val, SDLoc(NodeToMatch),
+                                                        VT), nullptr));
       continue;
     }
     case OPC_EmitRegister: {
@@ -2964,10 +2966,12 @@ SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
 
       if (Imm->getOpcode() == ISD::Constant) {
         const ConstantInt *Val=cast<ConstantSDNode>(Imm)->getConstantIntValue();
-        Imm = CurDAG->getConstant(*Val, Imm.getValueType(), true);
+        Imm = CurDAG->getConstant(*Val, SDLoc(NodeToMatch), Imm.getValueType(),
+                                  true);
       } else if (Imm->getOpcode() == ISD::ConstantFP) {
         const ConstantFP *Val=cast<ConstantFPSDNode>(Imm)->getConstantFPValue();
-        Imm = CurDAG->getConstantFP(*Val, Imm.getValueType(), true);
+        Imm = CurDAG->getConstantFP(*Val, SDLoc(NodeToMatch),
+                                    Imm.getValueType(), true);
       }
 
       RecordedNodes.push_back(std::make_pair(Imm, RecordedNodes[RecNo].second));