1 files changed, 0 insertions, 116 deletions
diff --git a/llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.cpp b/llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.cpp
index 3e757f7..179e458c 100644
--- a/llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.cpp
+++ b/llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.cpp
@@ -733,121 +733,5 @@ Error MachOLinkGraphBuilder::graphifyCStringSection(
   return Error::success();
 }
 
-Error CompactUnwindSplitter::operator()(LinkGraph &G) {
-  auto *CUSec = G.findSectionByName(CompactUnwindSectionName);
-  if (!CUSec)
-    return Error::success();
-
-  if (!G.getTargetTriple().isOSBinFormatMachO())
-    return make_error<JITLinkError>(
-        "Error linking " + G.getName() +
-        ": compact unwind splitting not supported on non-macho target " +
-        G.getTargetTriple().str());
-
-  unsigned CURecordSize = 0;
-  unsigned PersonalityEdgeOffset = 0;
-  unsigned LSDAEdgeOffset = 0;
-  switch (G.getTargetTriple().getArch()) {
-  case Triple::aarch64:
-  case Triple::x86_64:
-    // 64-bit compact-unwind record format:
-    // Range start: 8 bytes.
-    // Range size:  4 bytes.
-    // CU encoding: 4 bytes.
-    // Personality: 8 bytes.
-    // LSDA:        8 bytes.
-    CURecordSize = 32;
-    PersonalityEdgeOffset = 16;
-    LSDAEdgeOffset = 24;
-    break;
-  default:
-    return make_error<JITLinkError>(
-        "Error linking " + G.getName() +
-        ": compact unwind splitting not supported on " +
-        G.getTargetTriple().getArchName());
-  }
-
-  std::vector<Block *> OriginalBlocks(CUSec->blocks().begin(),
-                                      CUSec->blocks().end());
-  LLVM_DEBUG({
-    dbgs() << "In " << G.getName() << " splitting compact unwind section "
-           << CompactUnwindSectionName << " containing "
-           << OriginalBlocks.size() << " initial blocks...\n";
-  });
-
-  while (!OriginalBlocks.empty()) {
-    auto *B = OriginalBlocks.back();
-    OriginalBlocks.pop_back();
-
-    if (B->getSize() == 0) {
-      LLVM_DEBUG({
-        dbgs() << "  Skipping empty block at "
-               << formatv("{0:x16}", B->getAddress()) << "\n";
-      });
-      continue;
-    }
-
-    unsigned NumBlocks = B->getSize() / CURecordSize;
-
-    LLVM_DEBUG({
-      dbgs() << "  Splitting block at " << formatv("{0:x16}", B->getAddress())
-             << " into " << NumBlocks << " compact unwind record(s)\n";
-    });
-
-    if (B->getSize() % CURecordSize)
-      return make_error<JITLinkError>(
-          "Error splitting compact unwind record in " + G.getName() +
-          ": block at " + formatv("{0:x}", B->getAddress()) + " has size " +
-          formatv("{0:x}", B->getSize()) +
-          " (not a multiple of CU record size of " +
-          formatv("{0:x}", CURecordSize) + ")");
-
-    auto Blocks =
-        G.splitBlock(*B, map_range(seq(1U, NumBlocks), [=](Edge::OffsetT Idx) {
-          return Idx * CURecordSize;
-        }));
-
-    for (auto *CURec : Blocks) {
-      bool AddedKeepAlive = false;
-
-      for (auto &E : CURec->edges()) {
-        if (E.getOffset() == 0) {
-          LLVM_DEBUG({
-            dbgs() << "    Updating compact unwind record at "
-                   << CURec->getAddress() << " to point to "
-                   << (E.getTarget().hasName() ? *E.getTarget().getName()
-                                               : StringRef())
-                   << " (at " << E.getTarget().getAddress() << ")\n";
-          });
-
-          if (E.getTarget().isExternal())
-            return make_error<JITLinkError>(
-                "Error adding keep-alive edge for compact unwind record at " +
-                formatv("{0:x}", CURec->getAddress()) + ": target " +
-                *E.getTarget().getName() + " is an external symbol");
-          auto &TgtBlock = E.getTarget().getBlock();
-          auto &CURecSym =
-              G.addAnonymousSymbol(*CURec, 0, CURecordSize, false, false);
-          TgtBlock.addEdge(Edge::KeepAlive, 0, CURecSym, 0);
-          AddedKeepAlive = true;
-        } else if (E.getOffset() != PersonalityEdgeOffset &&
-                   E.getOffset() != LSDAEdgeOffset)
-          return make_error<JITLinkError>(
-              "Unexpected edge at offset " + formatv("{0:x}", E.getOffset()) +
-              " in compact unwind record at " +
-              formatv("{0:x}", CURec->getAddress()));
-      }
-
-      if (!AddedKeepAlive)
-        return make_error<JITLinkError>(
-            "Error adding keep-alive edge for compact unwind record at " +
-            formatv("{0:x}", CURec->getAddress()) +
-            ": no outgoing target edge at offset 0");
-    }
-  }
-
-  return Error::success();
-}
-
 } // end namespace jitlink
 } // end namespace llvm