[llvm] [IR] llvm.reloc.none intrinsic for no-op symbol references (PR #147427)

[Matt Arsenault via llvm-commits]

================
@@ -7750,6 +7750,17 @@ void SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I,
     return;
   }
 
+  case Intrinsic::reloc_none: {
+    SDValue V = getValue(I.getArgOperand(0));
+    const auto *GA = cast<GlobalAddressSDNode>(V);
+    SDValue Ops[2];
+    Ops[0] = getRoot();
+    Ops[1] = DAG.getTargetGlobalAddress(GA->getGlobal(), sdl, V.getValueType(),
+                                        GA->getOffset());
----------------
arsenm wrote:

```suggestion
    SDValue Ops[2] = {
       getRoot(),
       DAG.getTargetGlobalAddress(GA->getGlobal(), sdl, V.getValueType(),
                                        GA->getOffset() };
```

https://github.com/llvm/llvm-project/pull/147427