Subzero: Initial implementation of BB Local CSE

src/IceClFlags.def

Index: src/IceClFlags.def
diff --git a/src/IceClFlags.def b/src/IceClFlags.def
index e9d082277b7a369aea499e5b8d0214860c87c490..5059989708ccbc0fe7b9dda2cc56016a181ea55a 100644
--- a/src/IceClFlags.def
+++ b/src/IceClFlags.def
@@ -140,6 +140,10 @@ struct dev_list_flag {};
              "information to stdout at the end of program execution."),        \
     cl::init(false))                                                           \
                                                                                \
+  X(EnableExperimental, bool, dev_opt_flag, "enable-experimental",   \
+    cl::desc("Enable Optimizations not yet part of O2"),                       \
+    cl::init(false))                                                           \
+                                                                               \
   X(EnablePhiEdgeSplit, bool, dev_opt_flag, "phi-edge-split",                  \
     cl::desc("Enable edge splitting for Phi lowering"), cl::init(true))        \
                                                                                \
@@ -176,6 +180,9 @@ struct dev_list_flag {};
              "building LLVM IR first"),                                        \
     cl::init(false))                                                           \
                                                                                \
+   X(LocalCseMaxIterations, int, dev_opt_flag, "lcse-max-iters",               \
+    cl::desc("Number of times local-cse is run on a block"), cl::init(2))      \
+                                                                               \
   X(LogFilename, std::string, dev_opt_flag, "log",                             \
     cl::desc("Set log filename"), cl::init("-"), cl::value_desc("filename"))   \
                                                                                \