Enable -fregs-graph with -O2; fixes #2790

diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs
index 447dd28..1977566 100644 (file)
--- a/compiler/main/DynFlags.hs
+++ b/compiler/main/DynFlags.hs
@@ -1021,6 +1021,7 @@ optLevelFlags
 
     , ([2],     Opt_LiberateCase)
     , ([2],     Opt_SpecConstr)
+    , ([2],     Opt_RegsGraph)
 
 --     , ([2],     Opt_StaticArgumentTransformation)
 -- Max writes: I think it's probably best not to enable SAT with -O2 for the