Reapply "RuntimeLibcalls: Use get_host_tool_path for executables used … (#159488) (#159489)

This reverts commit 44b7abc.

Add additional if TARGET checks

Author: arsenm

llvm/benchmarks/CMakeLists.txt

@@ -14,3 +14,23 @@ add_benchmark(SandboxIRBench SandboxIRBench.cpp PARTIAL_SOURCES_INTENDED)
 add_benchmark(RuntimeLibcallsBench RuntimeLibcalls.cpp PARTIAL_SOURCES_INTENDED)
 
 
+# Extract the list of symbols in a random utility as sample data.
+set(SYMBOL_TEST_DATA_FILE "sample_symbol_list.txt")
+
+get_host_tool_path(llvm-nm LLVM_NM llvm_nm_exe llvm_nm_target)
+get_host_tool_path(llc LLC llc_exe llc_target)
+
+if(TARGET ${llc_target} AND TARGET ${llvm_nm_target})
+  add_custom_command(OUTPUT ${SYMBOL_TEST_DATA_FILE}
+    COMMAND ${llvm_nm_exe} --no-demangle --no-sort
+    --format=just-symbols
+    ${SYMBOL_TEST_DATA_SOURCE_BINARY} > ${SYMBOL_TEST_DATA_FILE}
+   DEPENDS ${llvm_nm_target} ${llc_target})
+
+  add_custom_target(generate-runtime-libcalls-sample-symbol-list
+                    DEPENDS ${SYMBOL_TEST_DATA_FILE})
+
+  add_dependencies(RuntimeLibcallsBench generate-runtime-libcalls-sample-symbol-list)
+  target_compile_definitions(RuntimeLibcallsBench PRIVATE
+    -DSYMBOL_TEST_DATA_FILE="${CMAKE_CURRENT_BINARY_DIR}/${SYMBOL_TEST_DATA_FILE}")
+endif()