In this PR we ICEd because instrument_func_exit checked that
the last stmt of predecessors of EXIT_BLOCK_PTR is GIMPLE_RETURN,
but here we should allow BUILT_IN_RETURN function as well, as
it's basically the same as return.
I'm not sure about the testcase, but we don't have tsan testsuite
yet ...
Regtested on x86_64-linux, ok for trunk?
2013-04-03 Marek Polacek <pola...@redhat.com>
PR sanitizer/55702
* tsan.c (instrument_func_exit): Allow BUILT_IN_RETURN
functions.
* gcc.dg/pr55702.c: New test.
--- gcc/tsan.c.mp 2013-04-03 15:20:20.525933474 +0200
+++ gcc/tsan.c 2013-04-03 16:06:36.482160964 +0200
@@ -681,7 +681,8 @@ instrument_func_exit (void)
{
gsi = gsi_last_bb (e->src);
stmt = gsi_stmt (gsi);
- gcc_assert (gimple_code (stmt) == GIMPLE_RETURN);
+ gcc_assert (gimple_code (stmt) == GIMPLE_RETURN
+ || gimple_call_builtin_p (stmt, BUILT_IN_RETURN));
loc = gimple_location (stmt);
builtin_decl = builtin_decl_implicit (BUILT_IN_TSAN_FUNC_EXIT);
g = gimple_build_call (builtin_decl, 0);
--- gcc/testsuite/gcc.dg/pr55702.c.mp 2013-04-03 16:06:02.650055814 +0200
+++ gcc/testsuite/gcc.dg/pr55702.c 2013-04-03 16:05:33.984962743 +0200
@@ -0,0 +1,9 @@
+/* PR sanitizer/55702 */
+/* { dg-do compile { target { x86_64-*-linux* && lp64 } } } */
+/* { dg-options "-fsanitize=thread" } */
+
+void
+foo ()
+{
+ __builtin_return (0);
+}
Marek
