Subzero: Update tests and build scripts for sandboxing.

Makefile.standalone

 # The following variables will likely need to be modified, depending on where
 # and how you built LLVM & Clang. They can be overridden in a command-line
 # invocation of make, like:
 #
 #   make LLVM_SRC_PATH=<path> LLVM_BIN_PATH=<path> \
 #        LIBCXX_INSTALL_PATH=<path> CLANG_PATH=<path> ...
 #
 
 # LLVM_SRC_PATH is the path to the root of the checked out source code. This
 # directory should contain the configure script, the include/ and lib/
@@ skipping 128 matching lines @@
 
 UNITTEST_SRCS = \
         BitcodeMunge.cpp \
         IceELFSectionTest.cpp \
         IceParseInstsTest.cpp
 
 UNITTEST_OBJS = $(patsubst %.cpp, $(OBJDIR)/unittest/%.o, $(UNITTEST_SRCS))
 UNITTEST_LIB_OBJS = $(filter-out $(OBJDIR)/llvm2ice.o,$(OBJS))
 
 # Keep all the first target so it's the default.
-all: $(OBJDIR)/llvm2ice make_symlink
+all: $(OBJDIR)/llvm2ice make_symlink runtime
 
 # Creates symbolic link so that testing is easier. Also runs
 # llvm2ice to verify that the defines flags have valid values,
 # as well as describe the corresponding build attributes.
 make_symlink: $(OBJDIR)/llvm2ice
         rm -rf llvm2ice
         ln -s $(OBJDIR)/llvm2ice
         @echo "Build Attributes:"
         @$(OBJDIR)/llvm2ice --build-atts
 
-.PHONY: all make_symlink bloat
+.PHONY: all make_symlink runtime bloat
 
-# TODO(kschimpf): Fix python scripts to directly get build attributes
-# rather than generating $(OBJDIR)/llvm2ice.build_atts.
 $(OBJDIR)/llvm2ice: $(OBJS)
         $(CXX) $(LDFLAGS) -o $@ $^ $(LLVM_LDFLAGS) \
                -Wl,-rpath=$(abspath $(LIBCXX_INSTALL_PATH)/lib)
 
 # TODO(stichnot): Be more precise than "*.h" here and elsewhere.
 $(OBJS): $(OBJDIR)/%.o: src/%.cpp src/*.h src/*.def
         $(CXX) -c $(CXXFLAGS) $< -o $@
 
 $(OBJDIR)/run_unittests: $(UNITTEST_OBJS) $(UNITTEST_LIB_OBJS)
         $(CXX) $(LDFLAGS) -o $@ $^ $(LLVM_LDFLAGS) -lgtest -lgtest_main -ldl \
@@ skipping 10 matching lines @@
 $(OBJS): | $(OBJDIR)
 
 $(UNITTEST_OBJS): | $(OBJDIR)/unittest
 
 $(OBJDIR):
         @mkdir -p $@
 
 $(OBJDIR)/unittest: $(OBJDIR)
         @mkdir -p $@
 
+RT_SRC := runtime/szrt.c runtime/szrt_ll.ll
+RT_OBJ := build/runtime/szrt_native_x8632.o build/runtime/szrt_sb_x8632.o
+
+runtime: $(RT_OBJ)
+
+# Use runtime.is.built so that build-runtime.py is invoked only once
+# even in a parallel build.
+.INTERMEDIATE: runtime.is.built
+$(RT_OBJ): runtime.is.built
+runtime.is.built: $(RT_SRC)
+        @echo ================ Building Subzero runtime ================
+        ./pydir/build-runtime.py -v
+
 check-lit: $(OBJDIR)/llvm2ice make_symlink
         LLVM_BIN_PATH=$(LLVM_BIN_PATH) \
         BINUTILS_BIN_PATH=$(BINUTILS_BIN_PATH) \
         $(LLVM_SRC_PATH)/utils/lit/lit.py -sv tests_lit
 
 check-unit: $(OBJDIR)/run_unittests
         $(OBJDIR)/run_unittests
 
 ifdef MINIMAL
-check: check-lit check-unit
+check: check-lit check-unit runtime
         @echo "Crosstests ignored, minimal build"
 else
-check: check-lit check-unit
+check: check-lit check-unit runtime
         (cd crosstest; ./runtests.sh)
 endif
 
 FORMAT_BLACKLIST =
 # Add one of the following lines for each source file to ignore.
 FORMAT_BLACKLIST += ! -name IceParseInstsTest.cpp
 format:
         $(LLVM_BIN_PATH)/clang-format -style=LLVM -i \
         `find . -regex '.*\.\(c\|h\|cpp\)' $(FORMAT_BLACKLIST)`
 
 format-diff:
         git diff -U0 `git merge-base HEAD master` | \
         PATH=$(LLVM_BIN_PATH):$(PATH) \
         $(LLVM_SRC_PATH)/../clang/tools/clang-format/clang-format-diff.py \
         -p1 -style=LLVM -i
 
 bloat: make_symlink
         nm -C -S -l llvm2ice | \
         bloat/bloat.py --nm-output=/dev/stdin syms > build/llvm2ice.bloat.json
         @echo See Subzero size breakdown in bloat/llvm2ice.bloat.html
 
 clean:
         rm -rf llvm2ice *.o $(OBJDIR) build/llvm2ice.bloat.json
 
 clean-all: clean
         rm -rf build/