0002-support-partitioned-builds.patch

--- a/test-release.sh
+++ b/test-release.sh
@@ -48,6 +48,7 @@ ExportBranch=""
 git_ref=""
 do_cmake_cache="no"
 do_bolt="no"
+Stages="all"
 if [ "$System" = "Linux" ]; then
     case $Machine in
         x86_64 | arm64 | aarch64 )
@@ -204,6 +205,20 @@ while [ $# -gt 0 ]; do
         -use-cmake-cache | --use-cmake-cache )
             do_cmake_cache="yes"
             ;;
+        -stage1 )
+            [ $Stages != "all" ] && echo 'Chaining stages is not supported' && exit 1
+            Stages="stage1"
+            do_test_suite="no"
+            ;;
+        -stage2 )
+            [ $Stages != "all" ] && echo 'Chaining stages is not supported' && exit 1
+            Stages="stage2"
+            do_test_suite="no"
+            ;;
+        -stage3 )
+            [ $Stages != "all" ] && echo 'Chaining stages is not supported' && exit 1
+            Stages="stage3"
+            ;;
         -help | --help | -h | --h | -\? )
             usage
             exit 0
@@ -673,6 +688,7 @@ for Flavor in $Flavors ; do
     echo "********************************************************************************"
     echo "  Release:     $Release-$RC"
     echo "  Build:       $Flavor"
+    echo "  Stage:       $Stages"
     echo "  System Info: "
     echo "    `uname -a`"
     echo "********************************************************************************"
@@ -691,6 +707,7 @@ for Flavor in $Flavors ; do
     llvmCore_phase3_objdir=$BuildDir/Phase3/$Flavor/llvmCore-$Release-$RC.obj
     llvmCore_phase3_destdir=$BuildDir/Phase3/$Flavor/llvmCore-$Release-$RC.install
 
+    if [ "$Stages" = "all" ] || [ "$Stages" = "stage1" ]; then
     rm -rf $llvmCore_phase1_objdir
     rm -rf $llvmCore_phase1_destdir
 
@@ -716,7 +733,13 @@ for Flavor in $Flavors ; do
     build_llvmCore 1 $Flavor \
         $llvmCore_phase1_objdir $llvmCore_phase1_destdir
     clean_RPATH $llvmCore_phase1_destdir/usr/local
+    fi
 
+    if [ "$Stages" = "stage1" ]; then
+        exit 0
+    fi
+
+    if [ "$Stages" = "all" ] || [ "$Stages" = "stage2" ]; then
     ########################################################################
     # Phase 2: Build llvmCore with newly built clang from phase 1.
     c_compiler=$llvmCore_phase1_destdir/usr/local/bin/clang
@@ -726,6 +749,11 @@ for Flavor in $Flavors ; do
     build_llvmCore 2 $Flavor \
         $llvmCore_phase2_objdir $llvmCore_phase2_destdir
     clean_RPATH $llvmCore_phase2_destdir/usr/local
+    fi
+
+    if [ "$Stages" = "stage2" ]; then
+        exit 0
+    fi
 
     ########################################################################
     # Phase 3: Build llvmCore with newly built clang from phase 2.
@@ -760,6 +788,10 @@ done
 
 ) 2>&1 | tee $LogDir/testing.$Release-$RC.log
 
+if [ "$Stages" != "stage3" ] && [ "$Stages" != "all" ]; then
+    exit 0
+fi
+
 if [ "$use_gzip" = "yes" ]; then
   echo "# Packaging the release as $Package.tar.gz"
 else