1 files changed, 13 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/LiveDebugValues/LiveDebugValues.cpp b/llvm/lib/CodeGen/LiveDebugValues/LiveDebugValues.cpp
index 38e803d..bc1eaff 100644
--- a/llvm/lib/CodeGen/LiveDebugValues/LiveDebugValues.cpp
+++ b/llvm/lib/CodeGen/LiveDebugValues/LiveDebugValues.cpp
@@ -40,6 +40,18 @@ static cl::opt<bool>
                               "normal DBG_VALUE inputs"),
                      cl::init(false));
 
+// Options to prevent pathological compile-time behavior. If InputBBLimit and
+// InputDbgValueLimit are both exceeded, range extension is disabled.
+static cl::opt<unsigned> InputBBLimit(
+    "livedebugvalues-input-bb-limit",
+    cl::desc("Maximum input basic blocks before DBG_VALUE limit applies"),
+    cl::init(10000), cl::Hidden);
+static cl::opt<unsigned> InputDbgValueLimit(
+    "livedebugvalues-input-dbg-value-limit",
+    cl::desc(
+        "Maximum input DBG_VALUE insts supported by debug range extension"),
+    cl::init(50000), cl::Hidden);
+
 /// Generic LiveDebugValues pass. Calls through to VarLocBasedLDV or
 /// InstrRefBasedLDV to perform location propagation, via the LDVImpl
 /// base class.
@@ -103,5 +115,5 @@ bool LiveDebugValues::runOnMachineFunction(MachineFunction &MF) {
       TheImpl = llvm::makeVarLocBasedLiveDebugValues();
   }
 
-  return TheImpl->ExtendRanges(MF, TPC);
+  return TheImpl->ExtendRanges(MF, TPC, InputBBLimit, InputDbgValueLimit);
 }