diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tsan/pr106984.c | 7 | ||||
| -rw-r--r-- | gcc/tsan.cc | 13 |
2 files changed, 14 insertions, 6 deletions
diff --git a/gcc/testsuite/gcc.dg/tsan/pr106984.c b/gcc/testsuite/gcc.dg/tsan/pr106984.c new file mode 100644 index 0000000..69cf83d --- /dev/null +++ b/gcc/testsuite/gcc.dg/tsan/pr106984.c @@ -0,0 +1,7 @@ +/* { dg-do compile } */ +/* { dg-options "-fsanitize=thread" } */ + +int svcsw (int *ptr, int oldval, int newval) +{ + return __sync_val_compare_and_swap (ptr, oldval, newval); +} diff --git a/gcc/tsan.cc b/gcc/tsan.cc index 79d4582..2406527 100644 --- a/gcc/tsan.cc +++ b/gcc/tsan.cc @@ -620,15 +620,16 @@ instrument_builtin_call (gimple_stmt_iterator *gsi) maybe_clean_or_replace_eh_stmt (stmt, gsi_stmt (*gsi)); if (tsan_atomic_table[i].action == val_cas && lhs) { - tree cond; stmt = gsi_stmt (*gsi); - g = gimple_build_assign (make_ssa_name (TREE_TYPE (t)), t); + tree t2 = make_ssa_name (TREE_TYPE (t)); + g = gimple_build_assign (t2, t); gsi_insert_after (gsi, g, GSI_NEW_STMT); t = make_ssa_name (TREE_TYPE (TREE_TYPE (decl)), stmt); - cond = build2 (NE_EXPR, boolean_type_node, t, - build_int_cst (TREE_TYPE (t), 0)); - g = gimple_build_assign (lhs, COND_EXPR, cond, args[1], - gimple_assign_lhs (g)); + tree cond = make_ssa_name (boolean_type_node); + g = gimple_build_assign (cond, NE_EXPR, + t, build_zero_cst (TREE_TYPE (t))); + gsi_insert_after (gsi, g, GSI_NEW_STMT); + g = gimple_build_assign (lhs, COND_EXPR, cond, args[1], t2); gimple_call_set_lhs (stmt, t); update_stmt (stmt); gsi_insert_after (gsi, g, GSI_NEW_STMT); |