Add loop recognition and CFG simplifications in new compiler.

We do three simplifications:
- Split critical edges, for code generation from SSA (new).
- Ensure one back edge per loop, to simplify loop recognition (new).
- Ensure only one pre header for a loop, to simplify SSA creation (existing).

Change-Id: I9bfccd4b236a00486a261078627b091c8a68be33

1 files changed, 3 insertions, 3 deletions

diff --git a/runtime/base/bit_vector.cc b/runtime/base/bit_vector.cc
index 0e01dc2349..a3e2b15232 100644
--- a/runtime/base/bit_vector.cc
+++ b/runtime/base/bit_vector.cc
@@ -399,13 +399,13 @@ uint32_t BitVector::NumSetBits(const uint32_t* storage, uint32_t end) {
   return count;
 }
 
-void BitVector::Dump(std::ostream& os, const char *prefix) {
+void BitVector::Dump(std::ostream& os, const char *prefix) const {
   std::ostringstream buffer;
   DumpHelper(buffer, prefix);
   os << buffer.str() << std::endl;
 }
 
-void BitVector::DumpDot(FILE* file, const char* prefix, bool last_entry) {
+void BitVector::DumpDot(FILE* file, const char* prefix, bool last_entry) const {
   std::ostringstream buffer;
   Dump(buffer, prefix);
 
@@ -421,7 +421,7 @@ void BitVector::DumpDot(FILE* file, const char* prefix, bool last_entry) {
   fprintf(file, "\\\n");
 }
 
-void BitVector::DumpHelper(std::ostringstream& buffer, const char* prefix) {
+void BitVector::DumpHelper(std::ostringstream& buffer, const char* prefix) const {
   // Initialize it.
   if (prefix != nullptr) {
     buffer << prefix;