diff --git a/core/clang/TARGET_arm.mk b/core/clang/TARGET_arm.mk
index 30313f9..9c1a836 100644
--- a/core/clang/TARGET_arm.mk
+++ b/core/clang/TARGET_arm.mk
@@ -1,4 +1,4 @@
-$(clang_2nd_arch_prefix)RS_TRIPLE := armv7-linux-androideabi
+$(clang_2nd_arch_prefix)RS_TRIPLE := renderscript32-linux-androideabi
 $(clang_2nd_arch_prefix)RS_TRIPLE_CFLAGS :=
 $(clang_2nd_arch_prefix)RS_COMPAT_TRIPLE := armv7-none-linux-gnueabi
 
diff --git a/core/clang/TARGET_arm64.mk b/core/clang/TARGET_arm64.mk
index d504600..9a67b6b 100644
--- a/core/clang/TARGET_arm64.mk
+++ b/core/clang/TARGET_arm64.mk
@@ -1,4 +1,4 @@
-RS_TRIPLE := aarch64-linux-android
+RS_TRIPLE := renderscript64-linux-android
 RS_TRIPLE_CFLAGS :=
 RS_COMPAT_TRIPLE := aarch64-linux-android
 
diff --git a/core/clang/TARGET_mips.mk b/core/clang/TARGET_mips.mk
index df96c5a..dfd99b2 100644
--- a/core/clang/TARGET_mips.mk
+++ b/core/clang/TARGET_mips.mk
@@ -1,4 +1,4 @@
-$(clang_2nd_arch_prefix)RS_TRIPLE := armv7-linux-androideabi
+$(clang_2nd_arch_prefix)RS_TRIPLE := renderscript32-linux-androideabi
 $(clang_2nd_arch_prefix)RS_TRIPLE_CFLAGS :=
 RS_COMPAT_TRIPLE := mipsel-linux-android
 
diff --git a/core/clang/TARGET_mips64.mk b/core/clang/TARGET_mips64.mk
index 785752a..a3684cc 100644
--- a/core/clang/TARGET_mips64.mk
+++ b/core/clang/TARGET_mips64.mk
@@ -1,4 +1,4 @@
-RS_TRIPLE := aarch64-linux-android
+RS_TRIPLE := renderscript64-linux-android
 RS_TRIPLE_CFLAGS :=
 RS_COMPAT_TRIPLE := mips64el-linux-android
 
diff --git a/core/clang/TARGET_x86.mk b/core/clang/TARGET_x86.mk
index f00eb41..1b9c78c 100644
--- a/core/clang/TARGET_x86.mk
+++ b/core/clang/TARGET_x86.mk
@@ -1,4 +1,4 @@
-$(clang_2nd_arch_prefix)RS_TRIPLE := armv7-linux-androideabi
+$(clang_2nd_arch_prefix)RS_TRIPLE := renderscript32-linux-androideabi
 $(clang_2nd_arch_prefix)RS_TRIPLE_CFLAGS := -D__i386__
 $(clang_2nd_arch_prefix)RS_COMPAT_TRIPLE := i686-linux-android
 
diff --git a/core/clang/TARGET_x86_64.mk b/core/clang/TARGET_x86_64.mk
index 0d615f2..0d3ee3f 100644
--- a/core/clang/TARGET_x86_64.mk
+++ b/core/clang/TARGET_x86_64.mk
@@ -1,4 +1,4 @@
-RS_TRIPLE := aarch64-linux-android
+RS_TRIPLE := renderscript64-linux-android
 RS_TRIPLE_CFLAGS := -D__x86_64__
 RS_COMPAT_TRIPLE := x86_64-linux-android
 
diff --git a/core/clang/config.mk b/core/clang/config.mk
index a71f110..60e0641 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -15,7 +15,7 @@
 # RenderScript-specific tools
 # These are tied to the version of LLVM directly in external/, so they might
 # trail the host prebuilts being used for the rest of the build process.
-RS_LLVM_PREBUILTS_VERSION := clang-2812033
+RS_LLVM_PREBUILTS_VERSION := clang-3289846
 RS_LLVM_PREBUILTS_BASE := prebuilts/clang/host
 RS_LLVM_PREBUILTS_PATH := $(RS_LLVM_PREBUILTS_BASE)/$(BUILD_OS)-x86/$(RS_LLVM_PREBUILTS_VERSION)/bin
 RS_CLANG := $(RS_LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX)
diff --git a/core/main.mk b/core/main.mk
index dabe093..48a39d0 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -903,7 +903,6 @@
 
 .PHONY: checkbuild
 checkbuild: $(modules_to_check) droid_targets
-checkbuild: checkbuild-soong
 
 ifeq (true,$(ANDROID_BUILD_EVERYTHING_BY_DEFAULT))
 droid: checkbuild
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index 969c115..35a01ee 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -16,9 +16,6 @@
 $(error dont use LOCAL_PREBUILT_JAVA_LIBRARIES anymore LOCAL_PATH=$(LOCAL_PATH))
 endif
 
-# Not much sense to check build prebuilts
-LOCAL_DONT_CHECK_MODULE := true
-
 my_32_64_bit_suffix := $(if $($(LOCAL_2ND_ARCH_VAR_PREFIX)$(my_prefix)IS_64_BIT),64,32)
 
 ifdef LOCAL_PREBUILT_MODULE_FILE
@@ -38,6 +35,8 @@
   endif
 endif
 
+LOCAL_CHECKED_MODULE := $(my_prebuilt_src_file)
+
 my_strip_module := $(firstword \
   $(LOCAL_STRIP_MODULE_$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)) \
   $(LOCAL_STRIP_MODULE))
diff --git a/target/product/base.mk b/target/product/base.mk
index 4d70664..2eb20aa 100644
--- a/target/product/base.mk
+++ b/target/product/base.mk
@@ -129,6 +129,9 @@
     vold \
     wm
 
+# Packages included only for eng or userdebug builds, previously debug tagged
+PRODUCT_PACKAGES_DEBUG := \
+    perfprofd
 
 PRODUCT_COPY_FILES := $(call add-to-product-copy-files-if-exists,\
     frameworks/base/preloaded-classes:system/etc/preloaded-classes)
diff --git a/tools/warn.py b/tools/warn.py
index 45ffda0..355d120 100755
--- a/tools/warn.py
+++ b/tools/warn.py
@@ -2096,13 +2096,17 @@
 def parallel_classify_warnings(warning_lines):
   """Classify all warning lines with num_cpu parallel processes."""
   num_cpu = args.processes
-  groups = [[] for x in range(num_cpu)]
-  i = 0
-  for x in warning_lines:
-    groups[i].append(x)
-    i = (i + 1) % num_cpu
-  pool = multiprocessing.Pool(num_cpu)
-  group_results = pool.map(classify_warnings, groups)
+  if num_cpu > 1:
+    groups = [[] for x in range(num_cpu)]
+    i = 0
+    for x in warning_lines:
+      groups[i].append(x)
+      i = (i + 1) % num_cpu
+    pool = multiprocessing.Pool(num_cpu)
+    group_results = pool.map(classify_warnings, groups)
+  else:
+    group_results = [classify_warnings(warning_lines)]
+
   for result in group_results:
     for line, pattern_idx, project_idx in result:
       pattern = warn_patterns[pattern_idx]