Add Om1 lowering with no optimizations

Makefile

Index: Makefile
diff --git a/Makefile b/Makefile
index e32ae89c6c0c91a5cf8709826efcc3ea605f3588..a1584f510ba9169a1fe2c6bc9819e84ecac0e29d 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@ 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
 
@@ -38,7 +38,10 @@ SRCS= \
 	IceCfgNode.cpp \
 	IceGlobalContext.cpp \
 	IceInst.cpp \
+	IceInstX8632.cpp \
 	IceOperand.cpp \
+	IceTargetLowering.cpp \
+	IceTargetLoweringX8632.cpp \
 	IceTypes.cpp \
 	llvm2ice.cpp
 
@@ -64,6 +67,7 @@ build:
 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: