Subzero. X8664. Enables RIP-based addressing mode.

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 119 matching lines @@
 
 ifdef MSAN
   # TODO(ascull): this has an as yet undiagnosed uninitialized memory access
   OBJDIR := $(OBJDIR)+MSan
   CXX_EXTRA += -fsanitize=memory
   LD_EXTRA += -fsanitize=memory
 endif
 
 ifdef FORCEASM
   FORCEASM_FLAG = --filetype=asm
-  # With --filetype=asm and --sandbox, the llvm-mc assembler emits the lock and
-  # 16-bit prefixes in the "wrong" order, causing the validator to reject the
-  # resulting nexe.  So we just disable those tests for now.
-  FORCEASM_XTEST_EXCLUDES = -e x8632,sandbox,test_sync_atomic
+  # With --filetype=asm and --sandbox:
+  # (1) the llvm-mc assembler emits the lock and 16-bit prefixes in the "wrong"
+  #     order, causing the validator to reject the resulting nexe.
+  # (2) the llvm-mc assembler fails to assemble rip/eip-based addresses.
+  # So we just disable those tests for now.
+  FORCEASM_XTEST_EXCLUDES = \
+      -e x8632,sandbox,test_sync_atomic \
+      -e x8664,sandbox,test_calling_conv \
+      -e x8664,sandbox,test_global
   FORCEASM_LIT_PARAM = --param=FORCEASM
   # x86 sandboxing lit tests are disabled because llvm-mc uses different
   # relocations for pushing return addresses onto the stack.
   # TODO(jpp): fix this.
   FORCEASM_LIT_TEST_EXCLUDES = --filter='^(?!.*/x86/sandboxing.ll).*'
 else
   FORCEASM_FLAG =
   FORCEASM_XTEST_EXCLUDES =
   FORCEASM_LIT_PARAM =
   FORCEASM_LIT_TEST_EXCLUDES =
@@ skipping 415 matching lines @@
         @cat Makefile.standalone-help/check-lit.txt
 
 help-check-xtest:
         @cat Makefile.standalone-help/check-xtest.txt
 
 clean:
         rm -rf pnacl-sz *.o $(OBJDIR) $(SB_OBJDIR) build/pnacl-sz.bloat.json
 
 clean-all: clean
         rm -rf build/  crosstest/Output/