[asan] simplify break_optimization in tests (Jakub Jelinek)

llvm-svn: 168990

compiler-rt/lib/asan/tests/CMakeLists.txt

@@ -105,7 +105,6 @@ endfunction()
 
 set(ASAN_NOINST_TEST_SOURCES
   asan_noinst_test.cc
-  asan_break_optimization.cc
   asan_test_main.cc
 )
 
@@ -147,8 +146,7 @@ if("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX AND NOT ANDROID)
   add_asan_compile_command(asan_benchmarks_test.cc "")
   add_custom_target(AsanBenchmarks)
   set_target_properties(AsanBenchmarks PROPERTIES FOLDER "Asan benchmarks")
-  add_asan_test(AsanBenchmarks AsanBenchmark asan_break_optimization.cc
-                                             asan_benchmarks_test.cc.asan.o)
+  add_asan_test(AsanBenchmarks AsanBenchmark asan_benchmarks_test.cc.asan.o)
 endif()
 
 # Main AddressSanitizer unit tests.

compiler-rt/lib/asan/tests/asan_break_optimization.cc

@@ -1,19 +0,0 @@
-//===-- asan_break_optimization.cc ----------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of AddressSanitizer, an address sanity checker.
-//
-//===----------------------------------------------------------------------===//
-
-#include "asan_test_utils.h"
-// Have this function in a separate file to avoid inlining.
-// (Yes, we know about cross-file inlining, but let's assume we don't use it).
-extern "C" void break_optimization(void *x) {
-  (void)x;
-}

compiler-rt/lib/asan/tests/asan_test_utils.h

@@ -53,8 +53,10 @@ typedef __int64          int64_t;
 #  define SANITIZER_WORDSIZE 32
 #endif
 
-// Make the compiler think that something is going on there.
-extern "C" void break_optimization(void *arg);
+// Make the compiler thinks that something is going on there.
+inline void break_optimization(void *arg) {
+  __asm__ __volatile__ ("" : : "r" (arg) : "memory");
+}
 
 // This function returns its parameter but in such a way that compiler
 // can not prove it.