Add CSSPGO configuration

Can be used with llvm/llvm-project#79942

driver.sh

@@ -41,6 +41,11 @@ PGO_ARGS="${BASE_PGO_ARGS} -C ${LCCC}PGO.cmake"
 BASE_LTO_PGO_ARGS="-DPGO_INSTRUMENT_LTO=Thin"
 # LTO+PGO: Two-stage + LTO + PGO
 LTO_PGO_ARGS="$BASE_LTO_PGO_ARGS $PGO_ARGS"
+# CSSPGO: Two-stage + CSSPGO build, trained on LLVM
+CSSPGO_ARGS="-DBOOTSTRAP_BOOTSTRAP_CLANG_PGO_TRAINING_DATA_SOURCE_DIR=${LL}
+  ${BASE_PGO_ARGS} -C ${LCCC}CSSPGO.cmake"
+# LTO+CSSPGO
+LTO_CSSPGO_ARGS="$BASE_LTO_PGO_ARGS $CSSPGO_ARGS"
 
 BOLT_PASSTHRU_ARGS="-DCLANG_BOOTSTRAP_CMAKE_ARGS=-C../../../../${LCCC}BOLT.cmake
   -DCLANG_BOOTSTRAP_TARGETS=clang-bolt"
@@ -49,9 +54,15 @@ BOLT_BASELINE_ARGS="$BASELINE_ARGS $BOLT_PASSTHRU_ARGS"
 BOLT_LTO_ARGS="$LTO_ARGS $BOLT_PASSTHRU_ARGS"
 BOLT_PGO_ARGS="$COMMON_CMAKE_ARGS -C ${LCCC}BOLT-PGO.cmake"
 BOLT_LTO_PGO_ARGS="$BASE_LTO_PGO_ARGS $BOLT_PGO_ARGS"
+BOLT_CSSPGO_ARGS="$COMMON_CMAKE_ARGS
+  -DBOOTSTRAP_CLANG_PGO_TRAINING_DATA_SOURCE_DIR=$PWD/${LL}
+  -C ${LCCC}BOLT-CSSPGO.cmake"
+BOLT_LTO_CSSPGO_ARGS="$BASE_LTO_PGO_ARGS $BOLT_CSSPGO_ARGS"
+
+CONFIGS=( BASELINE LTO PGO LTO_PGO CSSPGO LTO_CSSPGO )
 
 build () {
-    for cfg in BASELINE LTO PGO LTO_PGO
+    for cfg in ${CONFIGS[*]}
     do
         bcfg=BOLT_$cfg
         echo $bcfg
@@ -101,7 +112,7 @@ run () {
     RUNDIR=`mktemp -d`
     sudo mount -t tmpfs -o size=10g none $RUNDIR
 
-    for cfg in BASELINE LTO PGO LTO_PGO
+    for cfg in ${CONFIGS[*]}
     do
         echo $1
         bench $cfg $1 $RUNDIR