Add a flag to disable emission of .llvm_faultmaps metadata.

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/FaultMaps.cpp b/llvm/lib/CodeGen/FaultMaps.cpp
index 23560b4cd136..066a580645b1 100644
--- a/llvm/lib/CodeGen/FaultMaps.cpp
+++ b/llvm/lib/CodeGen/FaultMaps.cpp
@@ -17,9 +17,14 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/CommandLine.h"
 
 using namespace llvm;
 
+static cl::opt<bool> DisableFaultMaps("disable-fault-maps",
+  cl::desc("Disables emission of fault map metadata."),
+  cl::init(false), cl::Hidden);
+
 #define DEBUG_TYPE "faultmaps"
 
 static const int FaultMapVersion = 1;
@@ -45,6 +50,8 @@ void FaultMaps::recordFaultingOp(FaultKind FaultTy,
 }
 
 void FaultMaps::serializeToFaultMapSection() {
+  if (DisableFaultMaps)
+    return;
   if (FunctionInfos.empty())
     return;