diff --git a/bolt/CMakeLists.txt b/bolt/CMakeLists.txt
--- a/bolt/CMakeLists.txt
+++ b/bolt/CMakeLists.txt
@@ -9,16 +9,33 @@
   set(BOLT_ENABLE_RUNTIME ON)
 endif()
 
+set(BOLT_CLANG_EXE "" CACHE FILEPATH "Path to clang executable for the target \
+architecture for use in BOLT tests")
+set(BOLT_LLD_EXE "" CACHE FILEPATH "Path to lld executable for the target \
+architecture for use in BOLT tests")
+
 set(BOLT_INCLUDE_TESTS OFF)
 if (LLVM_INCLUDE_TESTS)
-  if ("clang" IN_LIST LLVM_ENABLE_PROJECTS)
-    if ("lld" IN_LIST LLVM_ENABLE_PROJECTS)
+  if ("clang" IN_LIST LLVM_ENABLE_PROJECTS OR BOLT_CLANG_EXE)
+    if ("clang" IN_LIST LLVM_ENABLE_PROJECTS AND BOLT_CLANG_EXE)
+      message(WARNING "BOLT_CLANG_EXE is set and clang project is enabled. \
+            BOLT_CLANG_EXE will be used for BOLT tests.")
+    endif()
+    if ("lld" IN_LIST LLVM_ENABLE_PROJECTS OR BOLT_LLD_EXE)
+      if ("lld" IN_LIST LLVM_ENABLE_PROJECTS AND BOLT_LLD_EXE)
+        message(WARNING "BOLT_LLD_EXE is set and lld project is enabled. \
+              BOLT_LLD_EXE will be used for BOLT tests.")
+      endif()
       set(BOLT_INCLUDE_TESTS ON)
     else()
-      message(WARNING "Not including BOLT tests since lld is disabled")
+      message(WARNING "Not including BOLT tests since lld is disabled. \
+            Enable lld in LLVM_ENABLE_PROJECTS or provide a path to lld binary \
+            in BOLT_LLD_EXE.")
     endif()
   else()
-    message(WARNING "Not including BOLT tests since clang is disabled")
+    message(WARNING "Not including BOLT tests since clang is disabled. \
+          Enable clang in LLVM_ENABLE_PROJECTS or provide a path to clang \
+          binary in BOLT_CLANG_EXE.")
   endif()
 endif()
 
diff --git a/bolt/test/CMakeLists.txt b/bolt/test/CMakeLists.txt
--- a/bolt/test/CMakeLists.txt
+++ b/bolt/test/CMakeLists.txt
@@ -13,6 +13,16 @@
   bolt_site_config=${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg
   )
 
+if (BOLT_CLANG_EXE AND NOT "clang" IN_LIST LLVM_ENABLE_PROJECTS)
+  add_executable(clang IMPORTED GLOBAL)
+  set_property(TARGET clang PROPERTY IMPORTED_LOCATION "${BOLT_CLANG_EXE}")
+endif()
+
+if (BOLT_LLD_EXE AND NOT "lld" IN_LIST LLVM_ENABLE_PROJECTS)
+  add_executable(lld IMPORTED GLOBAL)
+  set_property(TARGET lld PROPERTY IMPORTED_LOCATION "${BOLT_LLD_EXE}")
+endif()
+
 list(APPEND BOLT_TEST_DEPS
   clang
   count
diff --git a/bolt/test/lit.cfg.py b/bolt/test/lit.cfg.py
--- a/bolt/test/lit.cfg.py
+++ b/bolt/test/lit.cfg.py
@@ -55,8 +55,8 @@
 
 llvm_config.use_default_substitutions()
 
-llvm_config.use_clang()
-llvm_config.use_lld()
+llvm_config.use_clang(additional_tool_dirs=[os.path.dirname(config.bolt_clang)])
+llvm_config.use_lld(additional_tool_dirs=[os.path.dirname(config.bolt_lld)])
 
 config.substitutions.append(('%cflags', '-no-pie'))
 config.substitutions.append(('%cxxflags', '-no-pie'))
diff --git a/bolt/test/lit.site.cfg.py.in b/bolt/test/lit.site.cfg.py.in
--- a/bolt/test/lit.site.cfg.py.in
+++ b/bolt/test/lit.site.cfg.py.in
@@ -19,6 +19,8 @@
 config.host_arch = "@HOST_ARCH@"
 config.enable_abi_breaking_checks = "@LLVM_ENABLE_ABI_BREAKING_CHECKS@"
 config.python_executable = "@PYTHON_EXECUTABLE@"
+config.bolt_clang = "@BOLT_CLANG_EXE@"
+config.bolt_lld = "@BOLT_LLD_EXE@"
 
 # Support substitution of the tools and libs dirs with user parameters. This is
 # used when we can't determine the tool dir at configuration time.