https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63963
Bug ID: 63963
Summary: [5 Regression] LTO doesn't work with
__attribute__((__target__("sse4.2")))
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
On Linux/x86-64, r217664 gave
extern const uchar * search_line_sse42 (const uchar *s, const uchar *end);
int
main (int argc, char **argv)
{
return search_line_sse42 (argv[0], argv[0]) != 0;
}
[hjl@gnu-6 gcc]$ cat /tmp/lex.c
#include <stdint.h>
#include <x86intrin.h>
typedef unsigned char uchar;
const uchar *
__attribute__((__target__("sse4.2")))
search_line_sse42 (const uchar *s, const uchar *end)
{
typedef char v16qi __attribute__ ((__vector_size__ (16)));
static const v16qi search = { '\n', '\r', '?', '\\' };
uintptr_t si = (uintptr_t)s;
uintptr_t index;
v16qi sv;
sv = __builtin_ia32_loaddqu ((const char *) s);
index = __builtin_ia32_pcmpestri128 (search, 4, sv, 16, 0);
return s + index;
}
[hjl@gnu-6 gcc]$ ./xgcc -B./ -O2 -flto -c /tmp/x.c
[hjl@gnu-6 gcc]$ ./xgcc -B./ -O2 -flto x.o lex.o
/tmp/lex.c: In function \u2018main\u2019:
/tmp/lex.c:16:11: error: \u2018__builtin_ia32_pcmpestri128\u2019 needs isa
option -m32 -msse4.2
index = __builtin_ia32_pcmpestri128 (search, 4, sv, 16, 0);
^
lto-wrapper: fatal error: ./xgcc returned 1 exit status
compilation terminated.
/usr/local/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
[hjl@gnu-6 gcc]$
