Subzero: Refactor x86 register representation to actively use aliases.

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 178 matching lines @@
 
 CXXFLAGS := $(LLVM_CXXFLAGS) $(BASE_CXXFLAGS) $(CXX_DEFINES) $(HOST_FLAGS) \
   $(STDLIB_FLAGS)
 SB_CXXFLAGS := $(SB_LLVM_CXXFLAGS) $(BASE_CXXFLAGS) $(SB_CXX_DEFINES)
 
 LDFLAGS := $(HOST_FLAGS) -L$(LIBCXX_INSTALL_PATH)/lib -Wl,--gc-sections \
   $(LD_EXTRA) $(STDLIB_FLAGS)
 # Not specifying -Wl,--gc-sections but instead doing bitcode linking GC w/ LTO.
 SB_LDFLAGS := $(LINKOPTLEVEL) $(LD_EXTRA)
 
+# List the target-specific source files first, which generally take longer to
+# compile, in the hope of improving parallel build time.
 SRCS = \
+  IceAssemblerARM32.cpp \
+  IceInstARM32.cpp \
+  IceInstMIPS32.cpp \
+  IceInstX8632.cpp \
+  IceInstX8664.cpp \
+  IceTargetLowering.cpp \
+  IceTargetLoweringARM32.cpp \
+  IceTargetLoweringMIPS32.cpp \
+  IceTargetLoweringX8632.cpp \
+  IceTargetLoweringX8664.cpp \
   IceAssembler.cpp \
-  IceAssemblerARM32.cpp \
   IceBrowserCompileServer.cpp \
   IceCfg.cpp \
   IceCfgNode.cpp \
   IceClFlags.cpp \
   IceCompiler.cpp \
   IceCompileServer.cpp \
   IceELFObjectWriter.cpp \
   IceELFSection.cpp \
   IceFixups.cpp \
   IceGlobalContext.cpp \
   IceGlobalInits.cpp \
   IceInst.cpp \
-  IceInstARM32.cpp \
-  IceInstMIPS32.cpp \
-  IceInstX8632.cpp \
-  IceInstX8664.cpp \
   IceIntrinsics.cpp \
   IceLiveness.cpp \
   IceLoopAnalyzer.cpp \
   IceOperand.cpp \
   IceRegAlloc.cpp \
   IceRNG.cpp \
   IceSwitchLowering.cpp \
-  IceTargetLowering.cpp \
-  IceTargetLoweringARM32.cpp \
-  IceTargetLoweringMIPS32.cpp \
-  IceTargetLoweringX8632.cpp \
-  IceTargetLoweringX8664.cpp \
   IceThreading.cpp \
   IceTimerTree.cpp \
   IceTranslator.cpp \
   IceTypes.cpp \
   main.cpp \
   PNaClTranslator.cpp
 
 ifndef MINIMAL
   SRCS += \
     IceConverter.cpp \
@@ skipping 150 matching lines @@
           -i arm32,native,neon \
           -e arm32,native,neon,test_vector_ops \
           -e arm32,native,neon,test_select
         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
 
-ALLSPEC := 177.mesa 179.art 183.equake 188.ammp 164.gzip 175.vpr 176.gcc \
-           181.mcf 186.crafty 197.parser 253.perlbmk 254.gap 255.vortex \
-           256.bzip2 300.twolf 252.eon
+# List the spec2k components in roughly reverse order of runtime, to help with
+# parallel execution speed.
+ALLSPEC := 253.perlbmk 177.mesa 188.ammp 256.bzip2 164.gzip 179.art 183.equake \
+           175.vpr 176.gcc 181.mcf 186.crafty 197.parser 254.gap 255.vortex \
+           300.twolf 252.eon
 .PHONY: $(ALLSPEC)
 
 TARGET := x8632
 ifeq ($(TARGET),x8632)
   TARGETFLAG=x8632
   SETUP=SetupGccX8632Opt
   SPEC := -O2 --filetype=obj
 endif
 ifeq ($(TARGET),arm32)
   TARGETFLAG=arm32
   SETUP=SetupGccArmOpt
   SPEC := -O2 --filetype=asm
 endif
 
-%.spec2k: %
+%.spec2k: % $(OBJDIR)/pnacl-sz make_symlink runtime
         ./pydir/szbuild_spec2k.py -v --force --target=$(TARGETFLAG) $(SPEC) $<
         ( cd ../../../tests/spec2k; \
          ./run_all.sh RunTimedBenchmarks $(SETUP) train $< )
 
-check-spec: $(OBJDIR)/pnacl-sz make_symlink $(ALLSPEC:=.spec2k)
+check-spec: $(ALLSPEC:=.spec2k)
 
 check: check-lit check-unit check-xtest
 
 FORMAT_BLACKLIST =
 # Add one of the following lines for each source file to ignore.
 FORMAT_BLACKLIST += ! -name IceParseInstsTest.cpp
 FORMAT_BLACKLIST += ! -name IceParseTypesTest.cpp
 FORMAT_BLACKLIST += ! -name assembler_arm.h
 FORMAT_BLACKLIST += ! -name assembler_arm.cc
 format:
@@ skipping 13 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/