stringFromIslObj: Do not crash when printing 'null' objects

No test case, as this code path is currently only used for debugging.

llvm-svn: 252609

1 files changed, 5 insertions, 1 deletions

diff --git a/polly/lib/Support/GICHelper.cpp b/polly/lib/Support/GICHelper.cpp
index c26076761af..28883187269 100644
--- a/polly/lib/Support/GICHelper.cpp
+++ b/polly/lib/Support/GICHelper.cpp
@@ -74,7 +74,11 @@ static inline std::string stringFromIslObjInternal(__isl_keep ISLTy *isl_obj,
   isl_printer *p = isl_printer_to_str(ctx);
   printer_fn(p, isl_obj);
   char *char_str = isl_printer_get_str(p);
-  std::string string(char_str);
+  std::string string;
+  if (char_str)
+    string = char_str;
+  else
+    string = "null";
   free(char_str);
   isl_printer_free(p);
   return string;