From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../gcc.dg/Wstrict-aliasing-bogus-ref-all.c | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-ref-all.c (limited to 'gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-ref-all.c') diff --git a/gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-ref-all.c b/gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-ref-all.c new file mode 100644 index 000000000..7e8d17715 --- /dev/null +++ b/gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-ref-all.c @@ -0,0 +1,41 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -Wall" } */ + +struct g { long a; }; +unsigned long f(struct g *a) { return *(unsigned long *)&a->a; } + +struct A +{ + void *a; +}; + +int g(const struct A *x, long *y) +{ + typedef long __attribute__ ((may_alias)) long_a; + *y = *(const long_a *) (&x->a); + return 1; +} + +void *a; + +int +f0 (long *y) +{ + *y = *(const long *) &a; /* { dg-warning "will break" } */ + return 1; +} + +int +f1 (long *y) +{ + typedef long __attribute__ ((may_alias)) long_a; + *y = *(const long_a *) &a; + return 1; +} + +int +f2 (long *y) +{ + *y = *(const long *) &a; /* { dg-warning "will break" } */ + return 1; +} -- cgit v1.2.3