re PR middle-end/34450 (compile takes up 1.8 GB RAM at -O1)

[platform/upstream/gcc.git] / gcc / params.def

diff --git a/gcc/params.def b/gcc/params.def
index fc85c88..1915727 100644 (file)
--- a/gcc/params.def
+++ b/gcc/params.def
@@ -713,6 +713,17 @@ DEFPARAM (PARAM_MAX_PARTIAL_ANTIC_LENGTH,
          "Maximum length of partial antic set when performing tree pre optimization",
          100, 0, 0)
 
+/* The following is used as a stop-gap limit for cases where really huge
+   SCCs blow up memory and compile-time use too much.  If we hit this limit,
+   SCCVN and such FRE and PRE will be not done at all for the current
+   function.  */
+
+DEFPARAM (PARAM_SCCVN_MAX_SCC_SIZE,
+         "sccvn-max-scc-size",
+         "Maximum size of a SCC before SCCVN stops processing a function",
+         10000, 10, 0)
+
+
 /*
 Local variables:
 mode:c