Add general folding infrastructure.

Create the folding engine that will

1) attempt to fold an instruction.
2) iterates on the folding so small folding rules can be easily combined.
3) insert new instructions when needed.

I've added the minimum number of rules needed to test the features above.

1 files changed, 1 insertions, 0 deletions

diff --git a/Android.mk b/Android.mk
index 64985695..87d3e9e2 100644
--- a/Android.mk
+++ b/Android.mk
@@ -78,6 +78,7 @@ SPVTOOLS_OPT_SRC_FILES := \
 		source/opt/feature_manager.cpp \
 		source/opt/flatten_decoration_pass.cpp \
 		source/opt/fold.cpp \
+		source/opt/folding_rules.cpp \
 		source/opt/fold_spec_constant_op_and_composite_pass.cpp \
 		source/opt/freeze_spec_constant_value_pass.cpp \
 		source/opt/function.cpp \