Factor out prelowerPhi for 32-bit targets. Disable adv phi lowering for ARM.

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> LIBCXX_INSTALL_PATH=<path> CLANG_PATH=<path> \
 #        PNACL_BIN_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 310 matching lines @@
 check-xtest: $(OBJDIR)/pnacl-sz make_symlink runtime
         @echo "Crosstests disabled, minimal build"
 else
 check-xtest: $(OBJDIR)/pnacl-sz make_symlink runtime
        # Do all native/sse2 tests, but only test_vector_ops for native/sse4.1.
        # For (slow) sandboxed tests, limit to Om1/sse4.1.
         ./pydir/crosstest_generator.py -v --lit \
           --toolchain-root $(TOOLCHAIN_ROOT) \
           -i x8632,native,sse2 -i x8632,native,sse4.1,test_vector_ops \
           -i x8632,sandbox,sse4.1,Om1 \
-          -i arm32,native,neon,Om1,simple_loop \
-          -i arm32,native,neon,Om1,mem_intrin \
-          -i arm32,native,neon,Om1,test_stacksave \
-          -i arm32,native,neon,Om1,test_strengthreduce
+          -i arm32,native,neon,simple_loop \
+          -i arm32,native,neon,mem_intrin \
+          -i arm32,native,neon,test_stacksave \
+          -i arm32,native,neon,test_strengthreduce
         PNACL_BIN_PATH=$(PNACL_BIN_PATH) \
         $(LLVM_SRC_PATH)/utils/lit/lit.py -sv crosstest/Output
 endif
 
 check-unit: $(OBJDIR)/run_unittests
         $(OBJDIR)/run_unittests
 
 check: check-lit check-unit check-xtest
 
 FORMAT_BLACKLIST =
@@ skipping 17 matching lines @@
 
 docs:
         doxygen Doxyfile
         @echo See file://`pwd`/docs/html/index.html
 
 clean:
         rm -rf pnacl-sz *.o $(OBJDIR) $(SB_OBJDIR) build/pnacl-sz.bloat.json
 
 clean-all: clean
         rm -rf build/ docs/