Add some configure/CMake options for enabling/disabling Subzero targets.

configure

Index: configure
diff --git a/configure b/configure
index 2b7c41a5fbb46da9e3c3c9a891fe1f7020fd1f0d..64a059f22e3484d69e4e74cb65b7c2644f79d864 100755
--- a/configure
+++ b/configure
@@ -718,6 +718,7 @@ LLVM_ENUM_TARGETS
 LLVM_ENUM_ASM_PRINTERS
 LLVM_ENUM_ASM_PARSERS
 LLVM_ENUM_DISASSEMBLERS
+SUBZERO_ENUM_TARGETS
 OPTIMIZE_OPTION
 EXTRA_OPTIONS
 EXTRA_LD_OPTIONS
@@ -1435,11 +1436,14 @@ Optional Features:
   --enable-targets        Build specific host targets: all or
                           target1,target2,... Valid targets are: host, x86,
                           x86_64, sparc, powerpc, arm64, arm, aarch64, mips,
-                          hexagon, xcore, msp430, nvptx, systemz, r600, and
-                          js, cpp (default=all)
+                          hexagon, xcore, msp430, nvptx, systemz, r600, js,
+                          and cpp (default=all)
   --enable-experimental-targets
                           Build experimental host targets: disable or
                           target1,target2,... (default=disable)
+  --enable-subzero-targets
+                          Build specific subzero targets:
+                          target1,target2,...(default=none)
   --enable-bindings       Build specific language bindings:
                           all,auto,none,{binding-name} (default=auto)
   --enable-terminfo       Query the terminfo database if available (default is
@@ -5314,7 +5318,7 @@ _ACEOF
 
 fi
 
-ALL_TARGETS="X86 Sparc PowerPC ARM AArch64 Mips XCore MSP430 CppBackend NVPTX Hexagon SystemZ R600"
+ALL_TARGETS="X86 Sparc PowerPC ARM AArch64 Mips XCore MSP430 CppBackend JSBackend NVPTX Hexagon SystemZ R600"
 ALL_TARGETS=$ALL_TARGETS
 
 
@@ -5469,6 +5473,37 @@ done
 
 
 
+SUBZERO_TARGETS_TO_BUILD=""
+# Check whether --enable-subzero_targets was given.
+if test "${enable_subzero_targets+set}" = set; then
+  enableval=$enable_subzero_targets;
+else
+  enableval=none
+fi
+
+case "$enableval" in
+  none) ;;
+  *)for a_target in `echo $enableval|sed -e 's/,/ /g' ` ; do
+      case "$a_target" in
+        X8632)  SUBZERO_TARGETS_TO_BUILD="X8632 $SUBZERO_TARGETS_TO_BUILD" ;;
+        X8664)  SUBZERO_TARGETS_TO_BUILD="X8664 $SUBZERO_TARGETS_TO_BUILD" ;;
+        ARM32)   SUBZERO_TARGETS_TO_BUILD="ARM32 $SUBZERO_TARGETS_TO_BUILD" ;;
+        ARM64)   SUBZERO_TARGETS_TO_BUILD="ARM64 $SUBZERO_TARGETS_TO_BUILD" ;;
+        *) { { echo "$as_me:$LINENO: error: Unrecognized subzero target $a_target" >&5
+echo "$as_me: error: Unrecognized subzero target $a_target" >&2;}
+   { (exit 1); exit 1; }; } ;;
+      esac
+  done
+  ;;
+esac
+
+SUBZERO_ENUM_TARGETS=""
+for target_to_build in $SUBZERO_TARGETS_TO_BUILD; do
+  SUBZERO_ENUM_TARGETS="SUBZERO_TARGET($target_to_build) $SUBZERO_ENUM_TARGETS"
+done
+
+
+
 # Check whether --with-optimize-option was given.
 if test "${with_optimize_option+set}" = set; then
   withval=$with_optimize_option;
@@ -18440,6 +18475,8 @@ ac_config_headers="$ac_config_headers include/llvm/Config/config.h include/llvm/
 
 
 
+ac_config_files="$ac_config_files include/llvm/Config/SZTargets.def"
+
 ac_config_files="$ac_config_files include/llvm/Config/Targets.def"
 
 ac_config_files="$ac_config_files include/llvm/Config/AsmPrinters.def"
@@ -19069,6 +19106,7 @@ do
   case $ac_config_target in
     "include/llvm/Config/config.h") CONFIG_HEADERS="$CONFIG_HEADERS include/llvm/Config/config.h" ;;
     "include/llvm/Config/llvm-config.h") CONFIG_HEADERS="$CONFIG_HEADERS include/llvm/Config/llvm-config.h" ;;
+    "include/llvm/Config/SZTargets.def") CONFIG_FILES="$CONFIG_FILES include/llvm/Config/SZTargets.def" ;;
     "include/llvm/Config/Targets.def") CONFIG_FILES="$CONFIG_FILES include/llvm/Config/Targets.def" ;;
     "include/llvm/Config/AsmPrinters.def") CONFIG_FILES="$CONFIG_FILES include/llvm/Config/AsmPrinters.def" ;;
     "include/llvm/Config/AsmParsers.def") CONFIG_FILES="$CONFIG_FILES include/llvm/Config/AsmParsers.def" ;;
@@ -19312,6 +19350,7 @@ LLVM_ENUM_TARGETS!$LLVM_ENUM_TARGETS$ac_delim
 LLVM_ENUM_ASM_PRINTERS!$LLVM_ENUM_ASM_PRINTERS$ac_delim
 LLVM_ENUM_ASM_PARSERS!$LLVM_ENUM_ASM_PARSERS$ac_delim
 LLVM_ENUM_DISASSEMBLERS!$LLVM_ENUM_DISASSEMBLERS$ac_delim
+SUBZERO_ENUM_TARGETS!$SUBZERO_ENUM_TARGETS$ac_delim
 OPTIMIZE_OPTION!$OPTIMIZE_OPTION$ac_delim
 EXTRA_OPTIONS!$EXTRA_OPTIONS$ac_delim
 EXTRA_LD_OPTIONS!$EXTRA_LD_OPTIONS$ac_delim
@@ -19391,7 +19430,7 @@ LIBOBJS!$LIBOBJS$ac_delim
 LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 96; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5