Pass functors as rvalues when possible

On local compiles I saw that DeleteAllImpureWhich was the third
most time consuming method, using pprofs sorting in bottom-up.
By passing the functor it uses as rvalue, the method speeds up
~10% and it drops from the third most time consuming to the fourth.

The other modified methods in the CL are not showing up in the
pprof profile that I took, but changing them to use rvalues
shouldn't affect them negatively.

Test: Locally compile, take a trace, and observe time spent
Test: art/test/testrunner/testrunner.py --host --64 --optimizing -b
Change-Id: I6c363d5601fd4865f4e7881e64b883bd6bbedb69

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler/optimizing/stack_map_stream.h b/compiler/optimizing/stack_map_stream.h
index 8c7b1c01a7..a3daa29b4e 100644
--- a/compiler/optimizing/stack_map_stream.h
+++ b/compiler/optimizing/stack_map_stream.h
@@ -110,7 +110,7 @@ class StackMapStream : public DeletableArenaObject<kArenaAllocStackMapStream> {
 
   // Invokes the callback with pointer of each BitTableBuilder field.
   template<typename Callback>
-  void ForEachBitTable(Callback callback) {
+  void ForEachBitTable(Callback&& callback) {
     size_t index = 0;
     callback(index++, &stack_maps_);
     callback(index++, &register_masks_);