diff --git a/Makefile b/Makefile
index fc4dc51..a5c2101 100644
--- a/Makefile
+++ b/Makefile
@@ -4,9 +4,9 @@ INCLUDE=include
 PROJECT=fcmp
 
 OPT_FLAGS_RUST?= -C target-cpu=native
-OPT_FLAGS?= -march=native -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4
+OPT_FLAGS?= -march=native -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
+	    -floop-interchange -ftree-loop-distribution -floop-strip-mine -floop-block
 
-FEAT_RUST?= threads
 FEAT_CFLAGS?= -D_RUN_THREADED=0
 FEAT_LDFLAGS?= -lpthread
 
@@ -40,9 +40,6 @@ debug: | dirs $(PROJECT)-debug
 .PHONY: pgo
 pgo: | dirs $(PROJECT)-pgo
 
-.PHONY: rs
-rs: | $(PROJECT)-rs
-
 dirs:
 	@mkdir -p {obj,prof}/src
 
@@ -63,10 +60,6 @@ $(PROJECT)-debug: LDFLAGS := $(DEBUG_LDFLAGS) $(LDFLAGS)
 $(PROJECT)-debug: $(OBJ)
 	$(CC) $^ $(CFLAGS) -o $@ $(LDFLAGS)
 
-$(PROJECT)-rs:
-	cd fcmprs && OPT_FLAGS="$(OPT_FLAGS_RUST)" CARGO_FEATURES="$(FEAT_RUST)" $(MAKE)
-	cp -f ./fcmprs/target/release/fcmprs $@
-
 pgo-generate: CFLAGS := $(RELEASE_CFLAGS) $(CFLAGS)
 pgo-generate: LDFLAGS := $(RELEASE_LDFLAGS) $(LDFLAGS)
 pgo-generate: $(PGO_OBJ)
@@ -115,6 +108,5 @@ $(PROJECT)-pgo: pgo-profile
 	strip $@
 
 clean:
-	cd fcmprs && make clean
 	rm -rf {obj,prof}
-	rm -f $(PROJECT)-{release,debug,pgo,rs}
+	rm -f $(PROJECT)-{release,debug,pgo}