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| author | Shu-Chun Weng <scw@google.com> | 2021-05-03 16:12:44 -0700 |
|---|---|---|
| committer | Fangrui Song <i@maskray.me> | 2021-08-27 17:26:06 -0700 |
| commit | df64d523104d05a17c9ef66345077154588a5424 (patch) | |
| tree | 267825fc544f193c8812c17c9592a766e7df80ee | |
| parent | a21d58a0dcd816bd97b9de328ad1870cc7098d9b (diff) | |
| download | glibc-df64d523104d05a17c9ef66345077154588a5424.tar.gz | |
More aggressively prevent a buffer from being optimized out
The volatile global variable was first introduced in e86f9654c. I have
noticed the compiler still optimizing the buffer out on AArch64
presumably because the assignment is after all other observable
behaviors so it's still valid to eliminate it.
| -rw-r--r-- | string/tst-xbzero-opt.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/string/tst-xbzero-opt.c b/string/tst-xbzero-opt.c index e9c411b2ef..4f16c4d678 100644 --- a/string/tst-xbzero-opt.c +++ b/string/tst-xbzero-opt.c @@ -119,17 +119,17 @@ static void setup_no_clear (void) { unsigned char buf[TEST_BUFFER_SIZE]; - prepare_test_buffer (buf); vol_glob = buf; + prepare_test_buffer (buf); } static void setup_ordinary_clear (void) { unsigned char buf[TEST_BUFFER_SIZE]; + vol_glob = buf; prepare_test_buffer (buf); memset (buf, 0, TEST_BUFFER_SIZE); - vol_glob = buf; } static void |