[Bug debug/48147] [4.7 Regression] New debug test failures

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48147

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-03-16 13:41:28 UTC ---
Indeed - the linker plugin allows us to take foo() local.  The problem can
be reproduced w/o LTO with declaring foo static.  Then you get

FAIL: gcc.dg/guality/pr45882.c  -O2  line 16 b == 7
FAIL: gcc.dg/guality/pr45882.c  -O2  line 16 c == 11
FAIL: gcc.dg/guality/pr45882.c  -O2  line 16 d == 112
FAIL: gcc.dg/guality/pr45882.c  -O2  line 16 e == 142
FAIL: gcc.dg/guality/pr45882.c  -O3 -fomit-frame-pointer  line 16 b == 7
FAIL: gcc.dg/guality/pr45882.c  -O3 -fomit-frame-pointer  line 16 c == 11
FAIL: gcc.dg/guality/pr45882.c  -O3 -fomit-frame-pointer  line 16 d == 112
FAIL: gcc.dg/guality/pr45882.c  -O3 -fomit-frame-pointer  line 16 e == 142
FAIL: gcc.dg/guality/pr45882.c  -O3 -g  line 16 b == 7
FAIL: gcc.dg/guality/pr45882.c  -O3 -g  line 16 c == 11
FAIL: gcc.dg/guality/pr45882.c  -O3 -g  line 16 d == 112
FAIL: gcc.dg/guality/pr45882.c  -O3 -g  line 16 e == 142
FAIL: gcc.dg/guality/pr45882.c  -Os  line 16 b == 7
FAIL: gcc.dg/guality/pr45882.c  -Os  line 16 c == 11
FAIL: gcc.dg/guality/pr45882.c  -Os  line 16 d == 112
FAIL: gcc.dg/guality/pr45882.c  -Os  line 16 e == 142

as well.  So the question is what does the testcase try to test?

If you add used to the set of attributes of foo then the testcase passes with
LTO as well.

So LTO and -g works quite well ;)