Add Om1 lowering with no optimizations

Makefile

 # 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> ...
 #
 
 # 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/
 # directories of LLVM, Clang in tools/clang/, etc.
@@ skipping 11 matching lines @@
 $(info Using LLVM_SRC_PATH = $(LLVM_SRC_PATH))
 $(info Using LLVM_BIN_PATH = $(LLVM_BIN_PATH))
 $(info -----------------------------------------------)
 
 LLVM_CXXFLAGS := `$(LLVM_BIN_PATH)/llvm-config --cxxflags`
 LLVM_LDFLAGS := `$(LLVM_BIN_PATH)/llvm-config --ldflags --libs`
 
 # It's recommended that CXX matches the compiler you used to build LLVM itself.
 OPTLEVEL := -O0
 CXX := g++
-CXXFLAGS := -Wall -Werror -fno-rtti -fno-exceptions \
+CXXFLAGS := -Wall -Wextra -Werror -fno-rtti -fno-exceptions \

[JF, 2014/05/01 00:16:55]

That's bold. Kudos if you can keep -Wextra, but I've seen it complain about
really annoying stuff in the past!

[Jim Stichnoth, 2014/05/05 07:03:55]

So far so good.  The only complaint to deal with was unused function arguments. 
I tried to crank it up to 11, but that revealed problems in LLVM headers.

         $(OPTLEVEL) -g $(LLVM_CXXFLAGS) -m32
 LDFLAGS := -m32
 
 SRCS= \
         IceCfg.cpp \
         IceCfgNode.cpp \
         IceGlobalContext.cpp \
         IceInst.cpp \
+        IceInstX8632.cpp \
         IceOperand.cpp \
+        IceTargetLowering.cpp \
+        IceTargetLoweringX8632.cpp \
         IceTypes.cpp \
         llvm2ice.cpp
 
 OBJS=$(patsubst %.cpp, build/%.o, $(SRCS))
 
 # Keep all the first target so it's the default.
 all: llvm2ice
 
 .PHONY: all
 
 llvm2ice: $(OBJS)
         $(CXX) $(LDFLAGS) -o $@ $^ $(LLVM_LDFLAGS) -ldl
 
 # TODO: Be more precise than "*.h" here and elsewhere.
 $(OBJS): build/%.o: src/%.cpp src/*.h src/*.def
         $(CXX) -c $(CXXFLAGS) $< -o $@
 
 $(OBJS): | build
 
 build:
         @mkdir -p $@
 
 check: llvm2ice
         LLVM_BIN_PATH=$(LLVM_BIN_PATH) \
         $(LLVM_SRC_PATH)/utils/lit/lit.py -sv tests_lit
+        (cd crosstest; LLVM_BIN_PATH=$(LLVM_BIN_PATH) ./runtests.sh)

[JF, 2014/05/01 00:16:55]

When will it be appropriate to add test bots to subzero?

[Jim Stichnoth, 2014/05/05 07:03:55]

Should be doable and appropriate now - as of the previous CL push.

'make check' is all that's needed, but the LLVM toolchain needs to be built and
LLVM_BIN_PATH needs to point to it.

 
 # TODO: Fix the use of wildcards.
 format:
         $(LLVM_BIN_PATH)/clang-format -style=LLVM -i \
         src/Ice*.h src/Ice*.cpp src/llvm2ice.cpp
 
 clean:
         rm -rf llvm2ice *.o build/