re PR sanitizer/65400 (tsan mis-compiles inlineable C functions)

	PR sanitizer/65400
	* tsan.c (instrument_gimple): Clear tail call flag on
	calls.

	* c-c++-common/tsan/pr65400-3.c: New test.

From-SVN: r221512

1 files changed, 4 insertions, 0 deletions

diff --git a/gcc/tsan.c b/gcc/tsan.c
index ae89d5f..ebafbb0 100644
--- a/gcc/tsan.c
+++ b/gcc/tsan.c
@@ -680,6 +680,10 @@ instrument_gimple (gimple_stmt_iterator *gsi)
       && (gimple_call_fndecl (stmt)
 	  != builtin_decl_implicit (BUILT_IN_TSAN_INIT)))
     {
+      /* All functions with function call will have exit instrumented,
+	 therefore no function calls other than __tsan_func_exit
+	 shall appear in the functions.  */
+      gimple_call_set_tail (as_a <gcall *> (stmt), false);
       if (gimple_call_builtin_p (stmt, BUILT_IN_NORMAL))
 	instrument_builtin_call (gsi);
       return true;