Add cross test for vector itofp and fptoi casts.

pydir/szbuild.py

Index: pydir/szbuild.py
diff --git a/pydir/szbuild.py b/pydir/szbuild.py
index e0dbfc7303999ed03fe8069d4a731624e75ef972..e88244b06f6b265faa587258745d1be74e3245c2 100755
--- a/pydir/szbuild.py
+++ b/pydir/szbuild.py
@@ -189,6 +189,25 @@ def ProcessPexe(args, pexe, exe):
         shellcmd((
             'nm {obj} | sed -n "s/.* [a-zA-Z] //p" > {sym}'
             ).format(obj=obj_llc, sym=sym_llc), echo=args.verbose)
+    szrt_bitcode_src = (
+            '{root}/toolchain_build/src/subzero/runtime/szrt_i686.ll'
+            ).format(root=nacl_root)
+    szrt_bitcode_obj = (
+            '{root}/toolchain_build/src/subzero/build/szrt_i686.o'
+            ).format(root=nacl_root)
+    if args.force or \
+            NewerThanOrNotThere(szrt_bitcode_src, szrt_bitcode_obj) or \
+            NewerThanOrNotThere(llcbin, szrt_bitcode_obj):
+        shellcmd(['pnacl-translate',
+                  '-ffunction-sections',
+                  '-c',
+                  '-arch', 'x86-32-linux',
+                  '-O2',
+                  '--pnacl-driver-append-LLC_FLAGS_EXTRA=-externalize',
+                  '-o', szrt_bitcode_obj] +
+                 args.llc_args +
+                 [szrt_bitcode_src],
+                 echo=args.verbose)
     if args.force or NewerThanOrNotThere(pexe, obj_sz) or \
             NewerThanOrNotThere(llvm2ice, obj_sz):
         shellcmd([llvm2ice,
@@ -259,6 +278,7 @@ def ProcessPexe(args, pexe, exe):
         '{root}/toolchain/linux_x86/pnacl_newlib/translator/x86-32-linux/lib/' +
         '{{unsandboxed_irt,irt_query_list}}.o ' +
         '{root}/toolchain_build/src/subzero/runtime/szrt.c ' +
+        szrt_bitcode_obj + ' ' +
         '-lpthread -lrt'
         ).format(partial=obj_partial, exe=exe, root=nacl_root),
              echo=args.verbose)