diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/gimple-ssa-isolate-paths.cc | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr107301.c | 15 |
2 files changed, 19 insertions, 2 deletions
diff --git a/gcc/gimple-ssa-isolate-paths.cc b/gcc/gimple-ssa-isolate-paths.cc index 87ecd19..e4a4e08 100644 --- a/gcc/gimple-ssa-isolate-paths.cc +++ b/gcc/gimple-ssa-isolate-paths.cc @@ -647,7 +647,8 @@ handle_return_addr_local_phi_arg (basic_block bb, basic_block duplicate, if (!maybe && (flag_isolate_erroneous_paths_dereference || flag_isolate_erroneous_paths_attribute) - && gimple_bb (use_stmt) == bb) + && gimple_bb (use_stmt) == bb + && (duplicate || can_duplicate_block_p (bb))) { duplicate = isolate_path (bb, duplicate, e, use_stmt, lhs, true); @@ -765,7 +766,8 @@ find_implicit_erroneous_behavior (void) ? gimple_location (use_stmt) : phi_arg_loc; - if (stmt_uses_name_in_undefined_way (use_stmt, lhs, loc)) + if (stmt_uses_name_in_undefined_way (use_stmt, lhs, loc) + && (duplicate || can_duplicate_block_p (bb))) { duplicate = isolate_path (bb, duplicate, e, use_stmt, lhs, false); diff --git a/gcc/testsuite/gcc.dg/torture/pr107301.c b/gcc/testsuite/gcc.dg/torture/pr107301.c new file mode 100644 index 0000000..5f0afcc --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr107301.c @@ -0,0 +1,15 @@ +/* { dg-do compile } */ + +__attribute__ ((pure, returns_twice)) int +foo (int x) +{ + int a; + + a = x ? 3 : 0; + x /= a; + a = foo (x); + if (x == a) + __builtin_unreachable (); + + return 0; +} |