Define a new intrinsic, @llvm.debugger. It will be similar to __builtin_trap(),

but it generates int3 on x86 instead of ud2.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156593 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 5 insertions, 0 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index f1e879be95..c73ba7bc22 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -5087,6 +5087,10 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
     DAG.setRoot(Result.second);
     return 0;
   }
+  case Intrinsic::debugger: {
+    DAG.setRoot(DAG.getNode(ISD::DEBUGGER, dl,MVT::Other, getRoot()));
+    return 0;
+  }
   case Intrinsic::uadd_with_overflow:
   case Intrinsic::sadd_with_overflow:
   case Intrinsic::usub_with_overflow:
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
index f981afb437..7b633eff54 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
@@ -265,6 +265,7 @@ std::string SDNode::getOperationName(const SelectionDAG *G) const {
   case ISD::STACKSAVE:                  return "stacksave";
   case ISD::STACKRESTORE:               return "stackrestore";
   case ISD::TRAP:                       return "trap";
+  case ISD::DEBUGGER:                   return "debugger";
 
   // Bit manipulation
   case ISD::BSWAP:                      return "bswap";