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| author | Richard Biener <rguenther@suse.de> | 2014-02-25 08:57:42 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2014-02-25 08:57:42 +0000 |
| commit | 4094757e4be196c5a0f059e96ad149263c60555e (patch) | |
| tree | f8e6f541c9aa135dc1f98fca81a46054249d5156 /gcc/lto-opts.c | |
| parent | adbdb8c76e9757634a688b093f6567d67b8b2498 (diff) | |
| download | gcc-4094757e4be196c5a0f059e96ad149263c60555e.zip gcc-4094757e4be196c5a0f059e96ad149263c60555e.tar.gz gcc-4094757e4be196c5a0f059e96ad149263c60555e.tar.bz2 | |
re PR lto/60319 (wrong code (that hangs) by LTO at -Os and above on x86_64-linux-gnu)
2014-02-25 Richard Biener <rguenther@suse.de>
PR lto/60319
* lto-opts.c (lto_write_options): Output non-explicit conservative
-fwrapv, -fno-trapv and -fno-strict-overflow.
* lto-wrapper.c (merge_and_complain): Handle merging those options.
(run_gcc): And pass them through.
From-SVN: r208112
Diffstat (limited to 'gcc/lto-opts.c')
| -rw-r--r-- | gcc/lto-opts.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/lto-opts.c b/gcc/lto-opts.c index 3f67572..06796d6 100644 --- a/gcc/lto-opts.c +++ b/gcc/lto-opts.c @@ -117,6 +117,18 @@ lto_write_options (void) default: gcc_unreachable (); } + /* We need to merge -f[no-]strict-overflow, -f[no-]wrapv and -f[no-]trapv + conservatively, so stream out their defaults. */ + if (!global_options_set.x_flag_wrapv + && global_options.x_flag_wrapv) + append_to_collect_gcc_options (&temporary_obstack, &first_p, "-fwrapv"); + if (!global_options_set.x_flag_trapv + && !global_options.x_flag_trapv) + append_to_collect_gcc_options (&temporary_obstack, &first_p, "-fno-trapv"); + if (!global_options_set.x_flag_strict_overflow + && !global_options.x_flag_strict_overflow) + append_to_collect_gcc_options (&temporary_obstack, &first_p, + "-fno-strict-overflow"); /* Output explicitly passed options. */ for (i = 1; i < save_decoded_options_count; ++i) |