Running bootstrap-ubsan on ppc64le shows many instances of:
libcpp/lex.c:552:30: runtime error: load of misaligned address
0x01001f31d37a for type 'const uchar', which requires 16 byte alignment
But the unaligned vector loads are intended in this case, because they
are preferable to forced-alignment on POWER8. So just silence the ubsan
errors.
Tested with bootstrap-ubsan on ppc64le.
OK for trunk?
Thanks.
2015-03-02 Markus Trippelsdorf <mar...@trippelsdorf.de>
PR target/65261
* lex.c (init_vectorized_lexer): Silence ubsan errors.
diff --git a/libcpp/lex.c b/libcpp/lex.c
index 4638510..f7dbe27 100644
--- a/libcpp/lex.c
+++ b/libcpp/lex.c
@@ -519,6 +519,7 @@ init_vectorized_lexer (void)
and VSX unaligned loads (when VSX is available). This is otherwise
the same as the pre-GCC 5 version. */
+__attribute__ ((no_sanitize_undefined))
static const uchar *
search_line_fast (const uchar *s, const uchar *end ATTRIBUTE_UNUSED)
{
--
Markus
